Comparators and Reference Circuits
ADCMP350/ADCMP352/ADCMP354/ADCMP356
Rev. A
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Fax: 781.326.8703© 2004-2009 Analog Devices, Inc. All rights reserved.
FEATURES
Comparators with 0.6 V on-chip references
Output stages:
Open-drain active-low (ADCMP350)
Push-pull active-low (ADCMP352)
Open-drain active-high (ADCMP354)
Push-pull active-high (ADCMP356)
High voltage (up to 22 V) tolerance on VIN and open-drain
output pins
Low power consumption (10 µA)
10 nA input bias current
15 mV hysteresis
5 µs propagation delay
Specified over −40°C to +125°C temperature range
4-lead SC70 package
APPLICATIONS
Voltage detectors
Microprocessor systems
Computers
Battery monitors
Intelligent instruments
Portable equipment
GENERAL DESCRIPTION
The ADCMP350/ADCMP352/ADCMP354/ADCMP356 parts
are comparator and reference circuits suitable for use in
general-purpose applications. The high voltage input and
output structures will allow voltages of up to 22 V on the input
of all devices and the output of the open-drain devices. High
performance over the −40°C to +125°C temperature range
makes them suitable for use in automotive and other thermally
harsh applications, while low power consumption and space-
efficient SC70 packaging make them ideal for battery-powered
portable equipment.
FUNCTIONAL BLOCK DIAGRAMS
ADCMP350/ADCMP352
GND
OUT (OD/PP)
V
CC
V
IN
REF
ADCMP354/ADCMP356
GND
OUT (OD/PP)
V
CC
V
IN
04745-001
REF
`
Figure 1.
Table 1. Selection Table
Part No. Reference Voltage (V) Input Connection Output
ADCMP350 0.6 Inverting Open Drain
ADCMP352 0.6 Inverting Push-Pull
ADCMP354 0.6 Noninverting Open Drain
ADCMP356 0.6 Noninverting Push-Pull
ADCMP350/ADCMP352/ADCMP354/ADCMP356
Rev. A | Page 2 of 12
TABLE OF CONTENTS
Specifications ..................................................................................... 3
Absolute Maximum Ratings ............................................................ 4
ESD Caution .................................................................................. 4
Pin Configuration and Function Descriptions ............................. 5
Typical Performance Characteristics ............................................. 6
Applications ........................................................................................9
Adding Hysteresis..........................................................................9
Voltage Detector ............................................................................9
Outline Dimensions ....................................................................... 10
Ordering Guide .......................................................................... 10
REVISION HISTORY
11/09—Rev. 0 to Rev. A
Changes to Ordering Guide .......................................................... 10
10/04—Revision 0: Initial Version
ADCMP350/ADCMP352/ADCMP354/ADCMP356
Rev. A | Page 3 of 12
SPECIFICATIONS
VCC = Full operating range, TA = –40°C to +125°C, unless otherwise noted.
Table 2.
Parameter Min Typ Max Unit Test Conditions/Comments
SUPPLY
VCC Operating Voltage Range 2.25 5.5 V
VIN Operating Voltage Range 0 22 V
Supply Current 10 15 µA
VIN THRESHOLD RISING 0.579 0.6 0.621 V VCC = 3.3V, TA = −40°C to +85°C
0.579 0.6 0.624 V VCC = 3.3V, TA = −40°C to +125°C
VIN THRESHOLD FALLING 0.564 0.585 0.606 V VCC = 3.3V, TA = −40°C to +85°C
0.564 0.585 0.609 V VCC = 3.3V, TA = −40°C to +125°C
INPUT BIAS CURRENT 10 nA VIN = 0.6 V
170 µA VIN = 22 V
THRESHOLD TEMPERATURE COEFFICIENT 30 ppm/°C
VIN TO OUT DELAY 5 µs VIN = VTH to (VTH − 100 mV)
OUT VOLTAGE LOW 0.4 V VIN < VTH min, ISINK = 1.2 mA
OUT VOLTAGE HIGH 0.8 × VCC V VIN > VTH max, ISOURCE = 500 µA,
Push-pull only
OUTPUT RISE TIME 30 ns Cout = 15 pF
OUTPUT FALL TIME 45 ns Cout = 15 pF
OUTPUT LEAKAGE CURRENT 1 µA OUT = 22 V, open drain only
ADCMP350/ADCMP352/ADCMP354/ADCMP356
Rev. A | Page 4 of 12
ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted.
Table 3.
Parameter Rating
VCC −0.3 V to +6 V
VIN −0.3 V to +25 V
OUT (Open Drain) −0.3 V to +25 V
OUT (Push-Pull) −0.3 V to (VCC + 0.3 V)
Operating Temperature Range −40°C to +125°C
Storage Temperature Range −65°C to +150°C
θJA Thermal Impedance, SC70 146°C/W
Lead Temperature
Soldering (10 sec) 300°C
Vapor Phase (60 sec) 215°C
Infrared (15 sec) 220°C
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only and functional operation of the device at these or
any other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
ESD CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the
human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
ADCMP350/ADCMP352/ADCMP354/ADCMP356
Rev. A | Page 5 of 12
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
4
ADCMP350/
ADCMP352/
ADCMP354/
ADCMP356
GND OUT
V
CC
V
IN
04745-002
1
3
2
Figure 2. Pin Configuration
Table 4. Pin Function Descriptions
Pin No. Mnemonic Description
1 VIN Monitors Analog Input Voltage. Connected to inverting or noninverting input, depending on model number.
2 GND Ground.
3 OUT Digital Output. Open-drain or push-pull options, depending on model number.
4 VCC Power Supply.
ADCMP350/ADCMP352/ADCMP354/ADCMP356
Rev. A | Page 6 of 12
TYPICAL PERFORMANCE CHARACTERISTICS
7.0
7.5
8.0
8.5
9.0
9.5
10.0
10.5
11.0
2.25
2.55 2.85 3.15 3.45 5.55
V
CC
(V)
I
CC
(µA)
05112-003
3.75 4.05 4.35 4.65 4.95 5.25
T
A
+125°C
T
A
+25°C
T
A
–40°C
T
A
+85°C
Figure 3. ICC vs. VCC over Temperature.
500
540
560
580
600
620
640
660
680
700
–40 –25 –10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
V
TRIP
(mV)
05112-004
VTRIP
TRIP RISING
520
VTRIP
TRIP FALLING
Figure 4. VIN Trip Threshold vs. Temperature.(VCC = 3.3V)
0
4
6
8
10
12
14
16
18
20
–40 –25 –10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
HYSTERESIS (mV)
05112-005
2
HYSTERESIS
Figure 5. VIN Trip Hysteresis vs. Temperature
0
4
6
8
10
12
14
16
18
20
02468 22
V
IN
(V)
SUPPLY CURRENT (µA)
05112-006
2
10 12 14 16 18 20
Figure 6. Supply Current vs. Input Voltage
0
40
60
80
100
120
140
160
180
200
02468 22
V
IN
(V)
IN LEAKAGE (µA)
05112-007
20
10 12 14 16 18 20
T
A
= +125°C
T
A
= +85°C
T
A
= +25°C
T
A
= –40°C
Figure 7. Input Leakage vs. Input Voltage
05112-019
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0 3.3
V
IN
(V)
V
IN
LEAKAGE (µA)
TA = 25°C
Figure 8. VIN Leakage Current vs. VIN Voltage (VCC = 3.8 V)
ADCMP350/ADCMP352/ADCMP354/ADCMP356
Rev. A | Page 7 of 12
110
120
140
150
160
170
180
190
200
IN LEAKAGE (µA)
05112-008
130
2.25 2.55 2.85 3.15 3.45 5.55
V
CC
(V)
3.75 4.05 4.35 4.65 4.95 5.25
T
A
= +125°C
T
A
= +85°C
T
A
= –40°C
T
A
= +25°C
100
Figure 9. Input Leakage vs. Supply Voltage (VIN = 22 V)
520
540
580
600
620
640
660
680
700
VTRIP (mV)
05112-009
560
2.25 2.55
2.85 3.15 3.45 5.55
V
CC
(V)
3.75 4.05 4.35 4.65 4.95 5.25
500
V
TRIP
RISING
V
TRIP
FALLING
Figure 10. VIN Trip Threshold vs. VCC
Figure 11. VIN Trip Hysteresis vs. VCC
0.1
1
10
100
1000
10000
0.01 0.1 10
OUTPUT SINK CURRENT (mA)
OUTPUT VOLTAGE (mV)
05112-010
1
TA = +125°C
TA = +85°C
TA = +25°C
TA = –40°C
Figure 12. Output Voltage vs. Output Sink Current (Isink = 500 mA)
20
40
80
100
120
OUTPUT LOW VOLTAGE (mV)
05112-011
60
2.25 2.40 2.70 3.00 3.30 5.50
SUPPLY VOLTAGE (V)
3.60 3.90 4.20 4.50
4.80 5.20
0
Figure 13. Output Low Voltage vs. Supply Voltage (Isink = 500 mA)
20
40
80
100
120
140
160
180
200
FALL TIME (ns)
05112-012
60
2.25 2.40 2.70 3.00 3.30 5.50
SUPPLY VOLTAGE (V)
3.60 3.90 4.20 4.50 4.80 5.20
0
RISE TIME
FALL TIME
Figure 14. Fall Time vs. Supply Voltage
ADCMP350/ADCMP352/ADCMP354/ADCMP356
Rev. A | Page 8 of 12
Figure 15. Short-Circuit Sink Current vs. Supply Voltage
(Vcc = 3.3, PUSH-PULL Only)
5
15
20
25
10 80 90 100 110 130
INPUT OVERDRIVE (mV)
PROPAGATION DELAY (µs)
05112-014
0
10
120706050403020
t
PLH
t
PHL
Figure 16. Propagation Delay vs. Input Overdrive (Vcc = 3.3, PUSH-PULL Only)
05112-015
CH1 20mV/DIV CH2 1.00V/DIV TIMEBASE: 10µs/DIV
1
2
CH1 = VIN
CH2 = VOUT
Figure 17. Propagation Delay Timing, 10 mV Overdrive
05112-016
CH1 100mV/DIV CH2 1.00V/DIV TIMEBASE: 10µs/DIV
1
2
CH1 = VIN
CH2 = VOUT
Figure 18. Propagation Delay Timing, 100 mV Overdrive
ADCMP350/ADCMP352/ADCMP354/ADCMP356
Rev. A | Page 9 of 12
APPLICATIONS
ADDING HYSTERESIS
To prevent oscillations at the output caused by noise or slowly
moving signals passing the switching threshold, positive
feedback can be used to add hysteresis to the noninverting parts
(ADCMP354 and ADCMP356).
For the noninverting configuration shown in Figure 19, two
resistors are used to create different switching thresholds,
depending on whether the input signal is increasing or
decreasing in magnitude. When the input voltage is increasing,
the threshold is above VREF, and when it’s decreasing, the
threshold is below VREF.
The upper input threshold level is given by
( )
R2
R1VR2R1V
VCC
REF
IN_HI
−+
=
where VREF = 0.6 V.
The lower input threshold level is given by
( )
R2
R2R1V
VREF
IN_LO
+
=
The hysteresis is the difference between these voltage levels and
is given by
R2
R1V
VCC
IN =∆
ADM331
OUT
ADCMP354
V
CC
= 5V
R
PULLUP
R
LOAD
R2
R1
V
IN
V
IN
05112-017
V
REF
= 0.6V
Figure 19. Noninverting Comparator Configuration with Hysteresis
VOLTAGE DETECTOR
The ADCMP35x parts can be used to monitor voltages, such as
battery monitoring or threshold detectors. Using a resistor
divider at the input to select the appropriate trip voltage, the
comparator can be configured to give a logic output when the
input passes that threshold. Figure 20 shows the typical
configuration of the ADCMP354 for monitoring a supply to
indicate that the voltage is above a certain level.
ADM331
OUT
ADCMP354
V
CC = 5V
R
PULLUP
R1 V
IN
V
IN
05112-018
V
REF
= 0.6V
R1
Figure 20. Voltage Detector Application
ADCMP350/ADCMP352/ADCMP354/ADCMP356
Rev. A | Page 10 of 12
OUTLINE DIMENSIONS
*PACKAGE OUTLINE CORRESPONDS IN FULL TO EIAJ SC82
EXCEPT FOR WIDTH OF PIN 2 AS SHOWN.
072809-A
*0.70
0.50
0.10 MAX
1.00
0.80 1.10
0.80
0.40
0.10
0.18
0.10 0.30
0.10
2
1
34
0.50 BSC
0.65 BSC
2.20
1.80
2.40
1.80
1.35
1.15
COPLANARITY
0.10
SEATING
PLANE
0.30
0.15
Figure 21. 4-Lead Thin Shrink Small Outline Transistor Package [SC70]
(KS-4)
Dimensions shown in millimeters
ORDERING GUIDE
Model Temperature Range Package Description
Package
Option Branding
ADCMP350YKS-REEL7 –40°C to +125°C 4-Lead SC70 KS-4 M0Z
ADCMP350YKSZ-REEL71 –40°C to +125°C 4-Lead SC70 KS-4 M55
ADCMP352YKS-REEL7 –40°C to +125°C 4-Lead SC70 KS-4 M11
ADCMP352YKSZ-REEL71 –40°C to +125°C 4-Lead SC70 KS-4 M8U
ADCMP354YKS-REEL7 –40°C to +125°C 4-Lead SC70 KS-4 M13
ADCMP354YKSZ-REEL71 –40°C to +125°C 4-Lead SC70 KS-4 M56
ADCMP356YKS-REEL7 –40°C to +125°C 4-Lead SC70 KS-4 M15
ADCMP356YKSZ-REEL71 –40°C to +125°C 4-Lead SC70 KS-4 M8V
1 Z = RoHS Compliant Part.
ADCMP350/ADCMP352/ADCMP354/ADCMP356
Rev. A | Page 11 of 12
NOTES
ADCMP350/ADCMP352/ADCMP354/ADCMP356
Rev. A | Page 12 of 12
NOTES
© 2004-2009 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D05112-0-11/09(A)