EMC1053-1-ACZL-TR - Microchip Technology, Inc.

SMSC EMC1053 DATASHEET Revision 1.41 (08-31-07)

Datasheet

PRODUCT FEATURES

EMC1053

1°C Triple Temperature

Sensor with Resistance

Error Correction &

Hotter of Two Zones

General Description

The EMC1053 is a System Management Bus (SMBus)

temperature sensor that monitors three temperature

zones, one internal diode and two externally connected

diodes, for PC and embedded environments. The

EMC1053 includes resistance error correction and

ideality factor configuration to elimin ate maj or sour ces of

temperature measurement error.1

An added feature to the EMC1053 is a function that

automatically compares the two external temperature

zones and reports the hotter of the two temperatures.

Selectable conversion rates and standby mode support

low-power operation. The temperature measurement

ranges support two data ranges (and formats), -64°C to

+127°C and -64°C to +191°C.

Applications

Desktop and Notebook Computers

Hardware Management

Servers

Embedded Applications

Features

Supports two External Temperature Diodes

—±1°C Accuracy (40°C to 80°C)

— 0.125°C Resolution

— Ideality Factor Configuration

— Accepts 2200pF Cap Across External Diodes for Noise

Suppression

— Optional Resistive Error Correction on External Dio de 2

— Resistance Error Correction (up to 100 Ohms)

— Selectable Beta Compensation for Substrate Diodes

Internal Temperature Diode

—±3°C Accuracy (0°C to 85°C)

— 0.125°C Resolution

Low Power Operation

— 4uA Standby Current

3.0V to 3.6V Supply

Programmable Conversion Rate

SMBus 2.0 Compliant

Reports Hotter of Two Diodes with Dual-core CPU

Simplified Block Diagram

1.Patents pending.

Local Temp

Diode

Switching

Current

SMCLK

Internal Diode

Configuration

Status Register

SMBus Interface

External Diode

1 Regist er

External Diode

2 Register

SMDATA

11-bit

delta-sigma

ADC

Analog M u x

and Anti-Alias Filter

DP1

DN1

DP2

DN2

Digital Mux

and

Byte Interlock

Reel size is 4,000 pieces.

Evaluation Boards available upon request. (EVB-EMC1053, EVB-EMC1053C)

ORDERING NUMBER PACKAGE FEATURES SMBUS ADDRESS

EMC1053-1-ACZL-TR

8 pin MSOP Lead-Free

RoHS Compliant package Two external diodes with

REC

1001_100x

EMC1053-2-ACZL-TR 1001_101x

EMC1053-3-ACZL-TR 1001_000x

EMC1053-4-ACZL-TR 1001_001x

1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones

Datasheet

Revision 1.41 (08-31-07) 2 SMSC EMC1053

DATASHEET

80 ARKAY DRIVE, HAUPPAUGE, NY 11788 (631) 435-6000, FAX (631) 273-3123

Circuit diagrams and other informa tion relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete information sufficient for

construction purposes is not necessarily given. Although the information has been checked and is believed to be accurate, no responsibility is assumed for inaccuracies. SMSC

reserves the right to make changes to specifications and product descriptions at any time without notice. Contact your local SMSC sales office to obtain the latest specifications

before placing your product order. The provision of this information does not convey to the purchaser of the described semiconductor devices any licenses under any patent

rights or other intellectual property rights of SMSC or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated

version of SMSC's standard Terms of Sale Agreement dated before the date of your order (the "Terms of Sale Agreement"). The product may contain design defects or errors

known as anomalies which may cause the product's functions to deviate from published specifications. Anomaly sheets are available upon request. SMSC products are not

designed, intended, authorized or warranted for use in any life support or other application where product failure could cause or contribute to personal injury or severe property

damage. Any and all such uses without prior written approval of an Officer of SMSC and further testing and/or modification will be fully at the risk of the customer. Copies of

this document or other SMSC literature, as well as the Terms of Sale Agreement, may be obtained by visiting SMSC’s website at http://www.smsc.com. SMSC is a registered

trademark of Standard Microsystems Corporation (“SMSC”). Product names and company names are the trademarks of their respective holders.

SMSC DISCLAIMS AND EXCLUDES ANY AND ALL WARRANTIES, INCLUDING WITHOUT LIMITATION ANY AND ALL IMPL IED WARRANTIES OF MERCHANTABILITY,

FITNESS FOR A PARTICULAR P URPOSE, TITLE, AND AGAINST INFRINGEMENT AND THE LIKE, AND ANY AND ALL WARRANTIES ARISING FROM ANY COURSE

OF DEALING OR USAGE OF TRADE. IN NO EVENT SHALL SMSC BE LIABLE FOR ANY DIRECT, INCIDENTAL, INDIRECT, SPECIAL, PUNITIVE, OR CONSEQUENTIAL

DAMAGES; OR FOR LOST DATA, PROFITS, SAVINGS OR REVENUES OF ANY KIND; REGARDLESS OF THE FORM OF ACTION, WHETHER BASED ON CONTRACT;

TORT; NEGLIGENCE OF SMSC OR OTHERS ; STRICT LIABILITY; BREACH OF WARRANTY; OR OTHERWISE; WHETHER OR NOT ANY REMEDY OF BUYER IS HELD

TO HAVE FAILED OF ITS E SSENTIAL PURPOSE, AND WHETHER OR NOT SMSC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

ORDERING INFORMATION

1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones

Datasheet

SMSC EMC1053 3 Revision 1.41 (08-31-07)

DATASHEET

Table of Contents

Chapter 1 Pin Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Chapter 2 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.1 Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.2 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.3 System Management Bus Interface Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.3.1 Write Byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.3.2 Read Byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.3.3 Send Byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.3.4 Receive Byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.3.5 SMBus Timing Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.4 SMBus Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.5 SMBus Timeout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Chapter 3 Product Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.1 Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.2 One Shot During Standby Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.3 Operation During Run Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.3.1 Conversion Rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.3.2 Dynamic Averaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.4 Temperature Monitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.5 Temperature Measurement Results and Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.6 Resistance Error Correction (REC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.7 Beta Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.8 Programmable Ideality Factor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.9 Diode Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Chapter 4 Register Set and Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.1 Legacy Temperature Data Registers (00h, 23h, 01h, 10h, F8h, F9h) . . . . . . . . . . . . . . . . . . . . . . 19

4.2 Extended Format Temperature Registers (FAh-FDh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.3 Status Register - 02h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.4 Configuration Register (03h Read, 09h Write) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.5 Configuration 2 Register - (04h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.6 One Shot Register - (0Fh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.7 Ideality Configuration Register s (27 h - 28h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.8 Beta Configuration Registers (29h - 2Ah). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4.9 Product ID Register (EDh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

4.10 Manufacturer ID Register (FEh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

4.11 Revision Register (FFh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Chapter 5 Typical Operating Curves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Chapter 6 Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

6.1 Package Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones

Datasheet

Revision 1.41 (08-31-07) 4 SMSC EMC1053

DATASHEET

List of Figures

Figure 1.1 EMC1053 Pin Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Figure 2.1 System Manag ement Bus Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 3.1 EMC1053 Diode System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 3.2 Block Diagram of Temperature Monitoring Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 3.3 External Diode Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 6.1 8-Pin MSOP Package Outline - 3x3mm Body 0.65mm Pitch. . . . . . . . . . . . . . . . . . . . . . . . . 27

1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones

Datasheet

SMSC EMC1053 5 Revision 1.41 (08-31-07)

DATASHEET

List of Tables

Table 1.1 EMC1053 Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Table 2.1 Absolute Maximum Ratings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Table 2.2 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Table 2.3 Write Byte Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Table 2.4 Read Byte Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Table 2.5 Send Byte Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Table 2.6 Receive Byte Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Table 3.1 Supply Current vs. Conve r sion Rat e and ADC Ave r aging Factor . . . . . . . . . . . . . . . . . . . . . . 12

Table 3.2 EMC1053 Temperature Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Table 4.1 EMC1053 Register Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Table 4.2 Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Table 4.3 Configuration Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Table 4.4 Conversion Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Table 4.5 Configuration 2 Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Table 4.6 One Shot Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Table 4.7 Ideality Configuration Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Table 4.8 Ideality Factor Look Up Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Table 4.9 Beta Configuration Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Table 4.10 Beta Configuration Look Up Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Table 4.11 Product ID Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Table 4.12 Manufacturer ID Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Table 4.13 Revision Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Table 6.1 8-Pin MSOP Package Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones

Datasheet

Revision 1.41 (08-31-07) 6 SMSC EMC1053

DATASHEET

Chapter 1 Pin Function

Figure 1.1 EMC1053 Pin Diagram

Table 1.1 EMC1053 Pin Descripti on

PIN PIN NO. DESCRIPTION

DP1 1 External Diode 1 Positive (anode) Connection

DN1 2 External Diode 1 Negative (cathode) Connection

DP2 3 External Diode 2 Positive (anode) Connection

DN2 4 External Diode 2 Negative (cathode) Connection

GND 5 Ground

VDD 6 Supply Voltage

SMDATA 7 System Management Bus Data - bi-directional data, open drain output

SMCLK 8 System Management Bus Clock Input

8-MSOP

DP1

DN1

DP2

DN2

SMCLK

SMDATA

VDD

GND

1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones

Datasheet

SMSC EMC1053 7 Revision 1.41 (08-31-07)

DATASHEET

Chapter 2 Electrical Specifications

2.1 Absolute Maximum Ratings

Note: Stresses ab ove those listed could cause damage to the device. This is a stress rating on ly and

functional operation of the device at any other condition above those ind icated in the operation

sections of this specification is not implied. When powering this device from laboratory or

system power supplies, it is im portant that the Absolute Maximum Ratings not be exceeded or

device failure can result. Some power supplies exhibit vol tage spikes on their outp uts when the

AC power is switched on or off. In addition, voltage transients on the AC power line may appear

on the DC output. If this possibility exists, it is suggested that a clamp circuit be used.

2.2 Electrical Specifications

Table 2.1 Absolute Maximum Ratings

DESCRIPTION RATING UNIT

Supply Voltage VDD -0.3 to 5.0 V

Voltage on SMDATA and SMCLK pins -0.3 to 5.5 V

Voltage on any other pin -0.3 to VDD+0.3 V

Operating Temperature Range -40 to 125 °C

Storage Temperature Range -55 to 150 °C

Lead Temperature Range Refer to JEDEC

Spec. J-STD-020

Package Thermal Characteristics for MSOP-8

Thermal Resistance TJA(at 0 air flow) 135.9 °C/W

ESD Rating, All Pins Human Body Model 2000 V

Table 2.2 Electrical Characteristics

VDD=3.0V to 3.6V, TA= -20°C to +85°C, Typical values at TA = 27°C unless otherwise noted

PARAMETER SYMBOL MIN TYP MAX UNITS CONDITIONS

DC Power

Supply Voltage VDD 3.0 3.3 3.6 V

Average Operating Current IDD 340 400 μA 4 conversions/s

See Table 4.4.

ISTBY 24μA Standby mode

Internal Temperature Monitor

Temperature Accuracy ± 1 ± 3 °C-20°C≤TA≤85°C

Temperature Resolution 0.125 °C

1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones

Datasheet

Revision 1.41 (08-31-07) 8 SMSC EMC1053

DATASHEET

Note 2.1 300nS rise time max is required for 400kHz bus operation. For lower clock frequencies,

the maximum rise time is (0.1/FSMB)+50nS

External Temperature Monitor

Temperature Accuracy

Remote Diode 40°C to 80°C

Remote Diode 0°C to 125°C± 1

± 3 °C

°C15°C≤TA≤70°C

-20°C≤TA≤85°C

Temperature Resolution 0.125 °C

Filter Capacitor CFILTER 2.2 nF Connected across

external diode

Note 2.2

Voltage Tolerance

Voltage at pin ( SMDATA,SMCLK) VTOL -0.3 5.5 V

SMBus Interface (SMDATA,SMCLK)

Input High Level VIH 2.0 V

Input Low Level VIL 0.8 V

Input High/Low Current IIH/IIL -1 1 μA

Hysteresis 500 mV

Input Capacitance 5 pF

Output Low Sink Current 6 mA SMDATA = 0.6V

SMBus Timing

Clock Frequency FSMB 10 400 kHz

Spike Suppression 50 ns

Bus free time Start to Stop TBUF 1.3 μs

Hold time Start THD:STA 0.6 μs

Setup time Start TSU:STA 0.6 μs

Setup time Stop TSU:STO 0.6 μs

Data Hold Time THD:DAT 0.3 μs

Data Setup Time TSU:DAT 100 ns

Clock Low Period TLOW 1.3 μs

Clock High Period THIGH 0.6 μs

Clock/Data Fall Time TF* 300 ns *Min = 20+0.1Cb ns

Clock/Data Rise Time TR* 300

Note

2.1

ns *Min = 20+0.1Cb ns

Capacitive Load (each bus line) Cb0.6 400 pF

Table 2.2 Electrical Chara cteristics (co ntinu ed)

VDD=3.0V to 3.6V, TA= -20°C to +85°C, Typical values at TA = 27°C unless otherwise noted

PARAMETER SYMBOL MIN TYP MAX UNITS CONDITIONS

1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones

Datasheet

SMSC EMC1053 9 Revision 1.41 (08-31-07)

DATASHEET

Note 2.2 See SMSC Applications for Application Notes and Guidelines when measuring GPU

processor diodes and CPU processor diodes.

2.3 System Management Bus Interface Protocol

A host controller, such as an SMSC I/O controller, communicates with the EMC1053 via the two wire

serial interface named SMBus. The SMBus interface is used to read and write registers in the

EMC1053, which is a slave-only device. A detailed timing diagram is shown in Figure 2.1.

Figure 2.1 System Management Bus Timing Diagram

The EMC1053 implements a subset of the SMBus specification and supports Write Byte, Read Byte,

Send Byte, and Receive Byte protocols as shown. In the tables that describe the protocol, the “gray”

columns indicate that the slave is driving the bus.

All of the below protocols use the following convention:

2.3.1 Write Byte

The Write Byte is used to write one byte of data to the registers as shown in Table 2.3.

2.3.2 Read Byte

The Read Byte protocol is used to read one byte of data from the registers as shown in Table 2.4.

DATA SENT

TO DEVICE DAT A SENT TO

THE HOST

# of bits sent # of bits sent

Table 2.3 Write Byte Protocol

START SLAVE ADDRESS WR ACK COMMAND ACK DATA ACK STOP

171

181811

Table 2.4 Read Byte Protocol

START SLAVE

ADDRESS WR ACK COMMAND ACK START SLAVE

ADDRESS RD ACK DATA NACK STOP

1711811 7 11811

SMDATA

SMCLK

TLOW

THIGH

TBUF

THD:STA

PSS - Start Condition P - Stop Condition

THD:DAT TSU:DAT TSU:STA

THD:STA

TSU:STO

1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones

Datasheet

Revision 1.41 (08-31-07) 10 SMSC EMC1053

DATASHEET

2.3.3 Send Byte

The Send Byte protocol is used to set the Internal Address Register to the correct Address as shown

in Table 2.5. The Send Byte can be followed by the Receive Byte protocol described in Table 2.6 to

read data from the register. The send byte protocol cannot be used to write data - if data is to be

written to a register then the write byte protocol must be used as described in Section 2.3.1.

2.3.4 Receive Byte

The Receive Byte protocol is used to read data from a register when the internal register address

pointer is known to be at the right location (e.g. set via Send Byte). This can be used for consecutive

reads of the same register as shown in Table 2.6.

2.3.5 SMBus Timing Diagram

The Timing for the SMBus is shown in Figure 2.1.

2.4 SMBus Addresses

The EMC1053 may be ordered with one of four slave addresses as shown in Ordering Information.

Attempting to communicate with the EMC1053 SMBu s interface with an in valid slave ad dress or invalid

protocol results in no response from the device and does not affect its register contents. The EMC1053

supports stretching of the SMCLK signal by other devices on the SMBus but will not perform this

operation itself.

2.5 SMBus Timeout

The EMC1053 includes an SMBus time-out feature. Following a 25 ms period of inactivity on the

SMBus, the device will time-out and reset the SMBus interface.

Table 2.5 Send Byte Protocol

START SLAVE ADDR WR ACK REG. ADDR ACK STOP

171

1811

Table 2.6 Receive Byte Protocol

START SLAVE ADDR RD ACK REG. DATA NACK STOP

171

1811

1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones

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SMSC EMC1053 11 Revision 1.41 (08-31-07)

DATASHEET

Chapter 3 Product Description

The EMC1053 is an SMBus sensor that monitors three temperature zones for use in a personal

computer or embedded environment. The part may be used as a companion to one of SMSC’s broad

line of SIO host devices to perform fan control and thermal management.

A typical system drawing of the EMC1053 is shown in Figure 3.1.

3.1 Power Modes

The EMC1053 has two power modes.

Run Mode - In this mode, the temperature monitors are active and converting at the programmed

conversion rate. The average power dissipation will depend on the conversion rate. When the

EMC1053 is not actively converting a channel, it goes into a lower power wait state.

Standby Mode (power-up default) - in this mode, the EMC10 53 is put into a low p ower state. In the

standby mode, temperature monitoring is disabled. The device will still respond to SMBus

commands.

3.2 One Shot During Standby Mode

The EMC1053 supports a One-Shot command when it is in Standby Mode. Writing to the One-Shot

to Standby Mode.

3.3 Operation During Run Mode

When the device is active, there are two modes of operation available.

Normal Mode (power-up default) - In this mode of operation, the EMC1053 continuously samples

and updates all of its temperature channels.

Hotter of Two Mode - In this mode, the EMC1053 continuously samples and then compares the

two remote zones. The hotter of the two remote zones is loaded into the External Diode 2 Data

Registers. In addition, the HOTTER bit in the Status register is set or cleared to indicate which

external diode zone is hotter. If the two remote zones are exactly equal to each other, then the

HOTTER bit is cleared (set to ‘0’), and the results of the two remote zones are stored in their

respective registers.

Figure 3.1 EMC1053 Diode System

EMC1053 Host

SMBus

Interface

SMBus

Internal

Diode

DP1

DN1

DP2

DN2

1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones

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3.3.1 Conversion Rates

The EMC1053 may be configured for different conversion rates based on the system requirements.

The available rates are 1 full set of conversions per second to 16 full sets of conversions per second.

The conversion rate is configured as described in Section 4.4. The available conversion rates are

shown in Table 4.4.

3.3.2 Dynamic Averaging

The EMC1053 temperature cha nnels support a n ew f eature that measures the external d iode chann els

for an extended time based on the selected conversion rate. This functionality can be disabled as

described in Section 4.5 for increased power savings at the lower conversion rates. When Dynamic

Averaging is enabled, the device will automatica lly adjust the sampling and measure ment time for both

external diode channels. This allows the device to average 2x or 4x longer than the normal 11 bit

operation while still maintaining the selected conversion rate. The benefits of Dynamic Averaging are

improved noise rejection due to the longer integration time as well as less random variation on the

temperature measurement.

The Dynamic Averaging applies when a One-Shot command is issued. The device will perform the

desired averaging during the one-shot operation according to the selected conversion rate.

The Dynamic Averaging will affect the average supply current based on the chosen conversion rate

as shown in Table 3.1.

3.4 Temperature Monitors

In general, thermal diode temp erature measurements are based on the ch ange in forward bi as voltage

of a diode when operated at two different currents. This ΔVBE is then proportional to absolute

temperature as shown in the following equation:

Table 3.1 Supply Current vs. Conversion Rate and ADC Av era gi ng Factor

CONVERSION RATE

ADC AVERAGING FACTOR

(MAX_RES = 1)

(DA_N = 0)

(MAX_RES = 0)

(DA_N = 0) 1X

(DA_N = 1)

1 / sec 190uA 132uA 105uA

2 / sec 315uA 205uA 150uA

4 / sec 580uA 350uA 235uA

8 / sec N/A 640uA 405uA

16 / sec N/A N/A 750uA

where:

k = Boltzmann’s constant

T = absolute temperature in Kelvin [1]

q = electron charge

= diode ideality factor

⎟

⎠

⎞

⎜

⎝

⎛

=−=Δ

LOW

HIGH

LOWBEHIGHBEBE I

VVV ln

1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones

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DATASHEET

Figure 3.2 shows a block diagram of the temperature measurement circuit. The negative terminal for

the remote temperature diode, DN, is internally biased with a forward diode voltage referenced to

ground.

The external diodes in the EMC1053 are compatible with a broad range of thermal diodes that may

be connected as shown in Figure 3.3.

Figure 3.2 Block Diagram of Temperature Monitoring Circuit

Figure 3.3 External Diode Configurations

Anti-

Aliasing

Filter ΔΣ

ADC

Resistance

Error

Correction

Substrate

PNP

ILOW IHIGH

Local

Ground

Typical

remotesubstrate

transistor

i.e. CPU substrate

PNP

Typical

remote

discrete NPN transistor

i.e.

2N3904

Typical

remote

discrete PNP transistor

i.e.

2N3906

1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones

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3.5 Temperature Measurement Results and Data

Each temperature result for each zone is available in two byte wide data registers. As shown in

Section 4.1, the 11-bit format has the 8 most significant bits stored in the high byte register and the 3

least significant bits stored in the three MSB positions of the low byte register. The delta-sigma ADC

may be operated with more than 11 bits of resolution for improved averaging as described in

Section 4.5, but the temperature result is reported at 11-bit resolution.

The temperature results for the two remote zones are also stored in extended format wi th a rang e from

-64°C to +191°C. The data format is a 2’s complement number offset by 64°C as shown in Section 4.2.

The data for each of the remote zones in both legacy and extended format is stored in separate data

registers so that both data formats are always available. Table 3.2 shows the default and extended

range formats.

3.6 Resistance Error Correction (REC)

Resistance error correction is an automatic feature that eliminates the need to characterize and

compensate for series resistance in the external diode lines. The EMC1053 corrects for as much as

100 ohms of series resistance.

When using a temp erature sensor that does not include resistance error correcti on, voltage developed

across the parasitic resistance in the external diode path produces an error in the reported

temperature. The error introduced by this resistance is approximately +0.7°C per ohm. Sources of

series resistance are PCB trace resistance, on die (i.e. on the processor) metal resistance, bulk

resistance in the base and emitter of the temperature transistor.

Table 3.2 EMC1053 Temperature Data Format

TEMPERATURE (°C)

RANGE -64°C TO 127°C RANGE -64°C TO 191°C

BINARY OFFSET BINARY

Diode Fault 100 0000 0000 100 0000 0000

<= -64 110 0000 0000 100 0000 0000

-63.875 110 0000 0001 100 0000 0001

-63 110 0000 1000 100 0000 1000

-1 111 1111 1000 101 1111 1000

0 000 0000 0000 110 0000 0000

0.125 000 0000 0001 110 0000 0001

1 000 0000 1000 110 0000 1000

64 010 0000 0000 000 0000 0000

65 010 0000 1000 000 0000 1000

127 011 1111 1000 001 1111 1000

1 2 7 . 87 5 0 11 1111 1111 0 0 1 1111 1111

128 011 1111 1111 010 0000 0000

1 9 1 0 11 1111 1111 0 11 1111 1 0 00

>= 191.875 011 1111 1111 011 1111 1111

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When monitoring the thermal diode of an AMD K8 processor, the Resistance Error Correction must be

disabled for accurate temperature measurements. This is accomplished by cleari ng the REC bit in the

configuration 2 register (see Section 4.5). Please see Application note “13.16 - Using the EMC1043

with AMD Processors” for more details.

3.7 Beta Compensation

The Beta Compensation functio n can be programmed to eliminate temperature errors caused by beta

variation in modern, low beta transistors used for monitoring processor temperatures. Changes in

beta as differing currents are applied to temperature transistors can cause significant temperature

errors in monitoring devices. As modern processor geometries shrink the trend is for transistor betas

to decrease, which exacerbates temperature errors.

By default, this functionality is disabled. It can be enabled by writing any value other than 07h in the

Beta Configuration Registers (see Section 4.10).

Discrete transistors, with collector connected to base to form a diode, are generally immune to these

temperature errors because of high (>100) betas. A beta variation of 10% from low current to high

current, when beta equals 100, induces approximately 0.12° error at 100°C. However for a low beta

(1.0) substrate transistor used for processor temperature measurement, a beta variation of 10% from

low to high current induces approximately 6.12° error at 100°C.

When measuring an AMD K8 processor, the Beta Compensation circuitry must be disabled. See

Section 4.8. Please see SMSC Application note “13.16 - Using the EMC1043 with AMD Processors”

for more details.

3.8 Programmable Ideality Factor

The EMC1053 default is for a diode ideality factor of 1.008 which is common for a 2N3904 diode and

for many processor transistors. When a diode or transistor is used that has a different ideality factor

value than 1.008 a temperature error is induced that is a linear function of temperature. Previous

solutions for this mismatch in ideality factor has been to supply a programmable offset to the

temperature reading which corrects the error at a single temperature but causes a re sidual error at all

other temperatures. The EMC1053 ideality factor register corrects this mismatch error at all

temperatures (see Section 4.7).

APPLICATION NOTE: When monitorin g a substrate transisto r or CP U diode and b eta compensation is enable d, the

Ideality Factor should not be adjusted. Beta Compensation automatically corrects for most

ideality errors.

3.9 Diode Faults

The EMC1053 detects a fault if the DP pin is left floating or is shorted to VDD. In the case of a diode

fault, the corresponding status bit will be set and the output data will be set at 400h.

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1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones

Datasheet

Chapter 4 Register Set and Description

The following registers are accessible through the SMBus Interface.

Table 4.1 EMC1053 Register Set

ADDRESS

R/W REGISTER NAME SYMBOL B7 B6 B5 B4 B3 B2 B1 B0 DEFAULT

VALUEREAD WRITE

00h N/A R Internal Temperature

High Byte - Legacy

Format

INTHBL Sign 64 32 16 8 4 2 1 00h

23h N/A R Internal Temperature

Low Byte - Legacy

Format

INTLBL 0.5 0.25 0.125 00h

01h N/A R External Diode 1 High

Byte - Legacy Format ET1HBL Sign 64 32 16 8 4 2 1 00h

10h N/A R External Diode 1 Low

Byte - Legacy Format ET1LBL 0.5 0.25 0.125 00h

F8h N/A R External Diode 2 High

Byte - Legacy Format ET2HBL Sign 64 32 16 8 4 2 1 00h

F9h N/A R External Diode 2 Low

Byte - Legacy Format ET2LBL 0.5 0.25 0.125 00h

FAh N/A R External Diode 1 High

Byte - Extended

Format

ET1HBE 128 64 32 16 8 4 2 1 00h

FBh N/A R External Diode 1 Low

Byte - Extended

Format

ET1LBE 0.5 0.25 0.125 00h

FCh N/A R External Diode 2 HIgh

Byte - Extended

Format

ET2HBE 128 64 32 16 8 4 2 1 00h

1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones

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FDh N/A R External Diode 2 Low

Byte - Extended

Format

ET2LBE 0.5 0.25 0.125 00h

Status and Control

02h N/A R Status STS Busy - - HOTT

ER - - D2 D1 00h

03h 09h R/W Configuration CFG - ADC_ST

OP - - - CR<2:0> 45h

04h 04h R/W Configuration 2 CFG2 - - - - MAX_

RES DA_n COMP REC 09h

One Shot

N/A 0Fh W One Shot Conversion Shot The data written to this register is irrelevant and will not be stored 00h

Ideality

27h 27h R/W External Diode 1

Ideality Correction

Factor

IDCF1 - - B5 B4 B3 B2 B1 B0 12h

(1.008)

28h 28h R/W External Diode 2

Ideality Correction

Factor

IDCF2 - - B5 B4 B3 B2 B1 B0 12h

(1.008)

29h 29h R/W External Diode 1 Beta

Configuration BCF1 - - - - - BETA<2:0> 07h

Table 4.1 EMC1053 Reg ister Set (continued)

ADDRESS

R/W REGISTER NAME SYMBOL B7 B6 B5 B4 B3 B2 B1 B0 DEFAULT

VALUEREAD WRITE

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1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones

Datasheet

2Ah 2Ah R/W External Diode 2 Beta

Configuration BCF2 - - - - - BETA<2:0> 07h

EDh EDh R Product ID PID 0 0 1 1 1 1 0 0 3Ch (-1)

0 0 1 1 1 1 0 1 3Dh (-2)

0 0 1 1 1 1 1 0 3Eh (-3)

0 0 1 1 1 1 1 1 3Fh (-4)

FEh FEh R Manufacturer ID SMSC 0 1 0 1 1 1 0 1 5Dh

FFh FFh R Revision Register REV - - - - 0 0 0 1 01h

Table 4.1 EMC1053 Register Set (continued)

ADDRESS

R/W REGISTER NAME SYMBOL B7 B6 B5 B4 B3 B2 B1 B0 DEFAULT

VALUEREAD WRITE

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DATASHEET

During Power on Reset (POR), the default values are stored in the registers. A POR is initiated when

power is first applied to the part and the voltage on the VDD supply surpasses the POR level as

specified in the electrical characteristics. Any reads to undefined registers will return 00h. Writes to

undefined registers will not have an effect.

The EMC1053 uses an interl ock mechanism that will update the Low byte of a particular moni tor when

the High Byte is read. This prevents changes in register content when the ADC updates between

successive reads.

4.1 Legacy Temperature Data Registers (00h, 23h, 01h, 10h, F8h,

F9h)

As shown in Table 4.1, each temperature monitor has two data registers. The 11 bit temperature data

is stored aligned to the left resulting in the High Byte containing te mperature in 1°C steps and the Low

Byte containing fractions of a degree.

4.2 Extended Format Temperature Registers (FAh-FDh)

The Extended Format Temperature Registers store only the external diode temperatures in the

extended data format. This is because, due to the operating range limitations of the EMC1053, the

internal temperature could not benefit from the extended temperature range. Like the Legacy data

formatting, the data is stored in two registers per temperature channel.

4.3 Status Register - 02h

The Status Register is a read o nly register and returns the opera ti onal status of the part. External dio de

faults are indicated by bits 1 and 0. If either bit is set to ‘1’, then a diode fault has occurred. When a

diode fault occurs, the D1 or D2 status bit is set, but otherwise the data remains unchanged.

Bit 7 - Busy - indicates that the ADC is currently converting a temperature.

Bit 4 - HOTTER - during Hotter of Two mode, this bit indicates which of the external diode channels

is hotter. If this bit is ‘0’, then External Diode 1 is hotter or equal to External Diode 2. If this bit is ‘1’,

then External Diode 2 is hotter than External Diod e 1. During no rmal operatio n, th is bit wil l always re ad

a ‘0’.

Bit 1 - D2 - indicates that a diode fault has occurred on External Diode 2.

Bit 0 - D1 - indicates that a diode fault has occurred on External Diode 1.

4.4 Configuration Register (03h Read, 09h Write)

Table 4.2 Status Register

ADDR REGISTER B7 B6 B5 B4 B3 B2 B1 B0 DEFAULT

02h Status Busy - - HOTTER - - D2 D1 00h

Table 4.3 Configu r ation Register

ADDR REGISTER B7 B6 B5 B4 B3 B2 B1 B0 DEFAULT

03h Read,

09h Write Config - STANDBY - - - CR<2:0> 45h

1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones

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Revision 1.41 (08-31-07) 20 SMSC EMC1053

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The Configuration Register controls the basic functionality of the EMC1053. The bits are described

below:

Bit 6 - STANDBY- controls the ADC conversions and power modes of the part.

'0' - The device is in the run operating mode. The ADC is converting at the user-programmed

conversion rate.

'1' - (default) The device is in the standby operating mode (see Section 3.1).

Bit 2-0 - CR<2:0> - determines the conversion rate for the temperature monitoring per Table 4.4.

4.5 Configuration 2 Register - (04h)

The Configuration 2 Register controls the basic functionality of the EMC1053 that is NOT compatible

with the EMC1023.

Bit 3 - MAX_RES - controls the external diode conversion time during dynamic averaging. Although

the dynamic averaging may be used to increase the ADC resolution, only 11 bits of data are available

in the temperature registers.

‘0’ - the dynami c averaging will set the ADC averaging factor at 1x when the conversion rate is set

at 16 conversions per second and 2x at conversion rates lower than 16 per second.

‘1’ (default) - the dynamic averaging will set the ADC averaging factor at 1x when the conversion

rate is set at 16 conversions per second, 2x a t 8 conversions / second and 4x at conversion rate s

lower than 8 per second.

Bit 2 - DA_n - controls the dynamic digital averaging circuitry. See Section 3.3.2.

‘0’ (default) - dynamic a veraging is enabled. Depending o n th e selected conversion rate, the ADC

averaging factor is increased for the external diodes.

Table 4.4 Conversion Rate

CR<2:0> CONVERSIONS / SECOND

(CONVERSION TIME)21 0

0 0 0 Reserved

0 0 1 Reserved

0 1 0 Reserved

0 1 1 1 Conversion / sec

1 0 0 2 Conversions / sec

1 0 1 4 Conversions / sec (default)

1 1 0 8 Conversions / sec

1 1 1 16 Conversions / sec

Table 4.5 Configuration 2 Register

ADDRREGISTERB7B6B5B4 B3 B2B1B0DEFAULT

04h CFG2 - - - - MAX_RES DA_n COMP REC 09h

1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones

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‘1’ - dynamic averaging is disabled. The ADC averaging factor will remain fixed at 1x for all

conversion rates and will allow increased power savings at the slower conversion rates.

Bit 1 - COMP - configures the device to perform a comparison for the Hotter of Two mode (see Section

3.3, "Operation During Run Mode," on page 11.)

‘0’ (default) - the device is in normal mode

‘1’ - the device is in Hotter of Two mode. In this mode, the two external diode channels are

measured and compared against each other. The hotter of the two channels has its data loaded

into the External Diode 2 Data Registers. The Internal Diode and External Diode 1 Data Registers

remain unaffected.

Bit 0 - REC - controls the Resistance Error Correction circuitry

'0' - The Resistance Error Correction circuitry is disabled.

'1' (default) - The Resistance Error Correction circuitry is active and will automatically correct for

up to 100 ohms of series resistance in the diode lines for both External Diode 1 and External Diode

2 channels.

4.6 One Shot Register - (0Fh)

The One Shot Register is an address place holder for the one-shot command. Writing to the address

initiates the command. The data written is not important and is not stored. Reading from the one-shot

registers will always return 00h.

4.7 Ideality Configuration Registers (27h - 28h)

The Ideality Configuration Registers store the ideality correction factor that is applied to each external

diode.

The table below shows the ideality factor settings for the Ideality Configuration registers. Shading

indicates power-up default. All codes that are not listed are reserved and should not be used.

Beta Compensation and Resistance Error Correction automatically correct for most diode ideality

errors, therefore it is not recommended that these settings be updated without consulting SMSC.

Table 4.6 One Shot Registers

ADDR REGISTER B7 B6 B5 B4 B3 B2 B1 B0 DEFAULT

0Fh One Shot

Conversion Writing to this register address initiates the one-shot. The data is not

important and is not stored 00h

Table 4.7 Ideality Configuration Registers

ADDR REGISTER B7 B6 B5 B4 B3 B2 B1 B0 DEFAULT

27h Diode 1 Ideality

Correction Factor - - B5 B4 B3 B2 B1 B0 12h

(1.008)

28h Diode 2 Ideality

Correction Factor - - B5 B4 B3 B2 B1 B0 12h

(1.008)

1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones

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4.8 Beta Configuration Registers (29h - 2Ah)

By default, the beta compensation circuitry is disabled and the EMC1053 is configured to measure

discrete diode-connected transistors. Writing to the Beta Configuration Registers will enable the beta

compensation circuitry and should be used if measuring a CPU substrate diode.

The beta compensation circuit is able to compensate for beta variation within a given range. The beta

configuration register is configured to the proper range to match the CPU to be monitored. The beta

values should be set so that the minimum expected beta is not below the threshold indicated in

Table 4.10. Beta compensation is activated if the BETA<2:0> bits are set to any value other than 07h.

Table 4.8 Ideality Factor Look Up Table

SETTING FACTOR SETTING FACTOR SETTING FACTOR

001000 0.9951 011000 1.0159 101000 1.0377

001001 0.9964 011001 1.0173 101001 1.0391

001010 0.9976 011010 1.0186 101010 1.0404

001011 0.9989 011011 1.0199 101011 1.0418

001100 1.0002 011100 1.0213 101100 1.0432

001101 1.0015 011101 1.0226 101101 1.0446

001110 1.0028 011110 1.0240 101110 1.0460

001111 1.0041 011111 1.0253 101111 1.0475

010000 1.0054 100000 1.0267 110000 1.0489

010001 1.0067 100001 1.0280 110001 1.0503

010010 1.0080 100010 1.0294

010011 1.0093 100011 1.0308

010100 1.0106 100100 1.0321

010101 1.0119 100101 1.0335

010110 1.0133 100110 1.0349

010111 1.0146 100111 1.0363

Table 4.9 Beta Configuration Registers

ADDR REGISTER B7 B6 B5 B4 B3 B2 B1 B0 DEFAULT

29h Diode 1 Beta

Configuration - - - - - BETA<2:0> 07h

2Ah Diode 2 Beta

Configuration - - - - - BETA<2:0> 07h

1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones

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DATASHEET

4.9 Product ID Register (EDh)

The Product ID Register holds the unique product ID for identifying SMSC EMC products. See

Table 4.1 for a list of the product ID number for each version of the EMC1053.

4.10 Manufacturer ID Register (FEh)

The Manufacturer ID register contains an 8 bit word that identifies the manufacturer of the EMC1053

(SMSC = 5Dh).

Table 4.10 Beta Configuration Look Up Table

BETA<2:0>

MINIMUM BETA21 0

00 0 0.11

00 1 0.18

01 0 0.25

0 1 1 0.33

10 0 0.43

10 1 1.00

11 0 2.33

1 1 1 Disabled (default)

Table 4.11 Product ID Registe r

ADDR REGISTER B7 B6 B5 B4 B3 B2 B1 B0 DEFAULT

EDhPID 00111 1X X3Ch (-1)

3Dh (-2)

3Eh (-3)

3Fh (-4)

Table 4.12 Manufacturer ID Regis t er

ADDR REGISTER B7 B6 B5 B4 B3 B2 B1 B0 DEFAULT

FEhSMSC01 0111015Dh

1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones

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DATASHEET

4.11 Revision Register (FFh)

The Revision register contains a 4 bit word that identifies the die revision.

Table 4.13 Revision Register

ADDR REGISTER B7 B6 B5 B4 B3 B2 B1 B0 DEFAULT

FFhREV - - - - 000101h

1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones

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Chapter 5 Typical Operating Curves

Supply Current vs. Conversion Rate

(TA = 27°C, VDD = 3.3V)

100

200

300

400

500

600

700

800

124816

Conversion Rate (conv / sec)

Supply Curre nt (uA)

Temperatu re Error vs. Filter Capacito r

(2N3904, TA = 27°C, TDIODE = 27°C, VDD = 3.3V)

-1.0

-0.8

-0.5

-0.3

0.0

0.3

0.5

0 1000 2000 3000 4000

Filter Capacitor (pF)

Temperature Error (°C)

Temperature Error vs. Ambient Temperature

(2N3904, TDIODE = 27°C, VDD = 3.3V)

-2.0

-1.5

-1.0

-0.5

0.0

0.5

1.0

1.5

2.0

0 153045607590

Ambient Temperature (°C)

Temperature Error (°C)

Temperature Error vs. External Diode Temperature

(2N3904, TA=42.5°C, VDD = 3.3 V)

-2.0

-1.5

-1.0

-0.5

0.0

0.5

1.0

1.5

2.0

0 25 50 75 100 125

External Diode Temperature ( °C)

Temperature Error (°C)

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Temperature Error vs. Leakage Resistance

(2N3904, TA = TDIODE = 27°C, VDD = 3.3V)

-40.0

-30.0

-20.0

-10.0

0.0

10.0

20.0

30.0

110100

Leakage Resistance (MΩ)

Temp eratu re Er ro r(° C)

DP to G N D

DP to VDD

Standby Current vs. Supply Voltage

(TA = 27°C)

0.0

0.5

1.0

1.5

2.0

2.5

3.0

2.9 3.1 3.3 3.5 3.7

Supply Voltage (V)

Standby Curre nt (uA)

T emp eratu re Erro r vs. Seri es Resi stan ce

2N3904, TA = TDIODE = 27°C, VDD = 3.3V

0.0

0.3

0.5

0.8

1.0

0 20406080100

S eries Resitance (Ω)

Temper ature E r r or

(° C) REC A ct iv e

Temper ature E r r or

(° C) REC Di sab led

REC Active

REC Disabled

T emp eratu re Error vs. CPU T emperature

Typical 65nm CP U from major vendor

(TA = 27°C, VDD = 3.3V, BETA = 011, CFILTER = 0pF)

-1

20 30 40 50 60 70 80 90 100

CPU T emperature (°C )

Temperat ure Error ( °C)

Beta Compensation Enabled

Beta Compensation Disabled

1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones

Datasheet

SMSC EMC1053 27 Revision 1.41 (08-31-07)

DATASHEET

Chapter 6 Package Outline

Figure 6.1 8-Pin MSOP Package Outline - 3x3mm Body 0.65mm Pitch

Table 6.1 8-Pin MSOP Package Para meters

Notes:

1. Controlling Unit: millimeters.

2. Tolerance on the true position of the leads is ± 0.065 mm maximum.

3. Package body dimensions D and E1 do not include mold protrusion or flash. Dimensions D and

E1 to be determined at datum plane H. Maximum mold protrusion or flash is 0.15mm (0.006 inches)

per end, and 0.15mm (0.006 inches) per side.

4. Dimension for foot length L measured at the gauge plane 0.25 mm above the seating plane.

5. Details of pin 1 identifier are optional but must be located within the zone indicated.

MIN NOMINAL MAX REMARKS

A 0.80 ~ 1.10 Overall Package Height

A1 0.05 ~ 0.15 Standoff

A2 0.75 0.85 0.95 Body Thickness

D 2.80 3.00 3.20 X Body Size

E 4.65 4.90 5.15 Y Span

E1 2.80 ~ 3.20 Y body Size

H 0.08 ~ 0.23 Lead Foot Thickness

L 0.40 ~ 0.80 Lead Foot Length

L1 0.95 REF Lead Length

e 0.65 BSC Lead Pitch

θ0o~8

oLead Foot Angle

W 0.22 ~ 0.38 Lead Width

ccc ~ ~ 0.10 Coplanarity

1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones

Datasheet

Revision 1.41 (08-31-07) 28 SMSC EMC1053

DATASHEET

6.1 Package Markings

All devices will be marked on the fi rst line of the top side with “1053 ”and the appropriate dash number

as ordered (-1 through -4). On the second line, they will be marked with version (V), revision (R) and

country of origin (CC) resulting in a four letter code of (VRCC).