Comparators and Reference Circuits
ADCMP350/ADCMP354/ADCMP356
Rev. B
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FEATURES
Comparators with 0.6 V on-chip references
Output stages
Open-drain active low (ADCMP350)
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
FUNCTIONAL BLOCK DIAGRAM
A
DCMP350
GND
OUT (OD)
V
CC
V
IN
REF
05112-001
Figure 1. ADCMP350 Functional Block Diagram
ADCMP354/ADCMP356
GND
OUT (OD/PP)
V
CC
VIN
REF
05112-021
Figure 2. ADCMP354/ADCMP356 Functional Block Diagram
GENERAL DESCRIPTION
The ADCMP350/ADCMP354/ADCMP356 are comparator and
reference circuits suitable for use in general-purpose applications.
The high voltage input and output structures 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.
Table 1. Selection Table
Part No.
Reference
Voltage (V)
Input
Connection Output
ADCMP350 0.6 Inverting Open-drain
ADCMP354 0.6 Noninverting Open-drain
ADCMP356 0.6 Noninverting Push-pull
ADCMP350/ADCMP354/ADCMP356
Rev. B | Page 2 of 12
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Absolute Maximum Ratings ............................................................ 4
ESD Caution .................................................................................. 4
Pin Configuration and Function Descriptions ..............................5
Typical Performance Characteristics ..............................................6
Applications Information .................................................................9
Adding Hysteresis..........................................................................9
Voltage Detector ............................................................................9
Outline Dimensions ....................................................................... 10
Ordering Guide .......................................................................... 10
REVISION HISTORY
4/11—Rev. A to Rev. B
Deleted ADCMP352 .......................................................... Universal
Changes to Adding Hysteresis Section, Figure 20, and
Figure 21 ............................................................................................ 9
11/09—Rev. 0 to Rev. A
Changes to Ordering Guide .......................................................... 10
10/04—Revision 0: Initial Version
ADCMP350/ADCMP354/ADCMP356
Rev. B | 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 = 3.3 V, TA = −40°C to +85°C
0.579 0.6 0.624 V VCC = 3.3 V, TA = −40°C to +125°C
VIN THRESHOLD FALLING 0.564 0.585 0.606 V VCC = 3.3 V, TA = −40°C to +85°C
0.564 0.585 0.609 V VCC = 3.3 V, 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 minimum, ISINK = 1.2 mA
OUT VOLTAGE HIGH 0.8 × VCC V VIN > VTH maximum, 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/ADCMP354/ADCMP356
Rev. B | 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; 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
ADCMP350/ADCMP354/ADCMP356
Rev. B | Page 5 of 12
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
4
ADCMP350/
ADCMP354/
ADCMP356
GND OUT
V
CC
V
IN
1
32
05112-002
Figure 3. 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 the model number.
2 GND Ground.
3 OUT Digital Output. Open-drain or push-pull options depending on the model number.
4 VCC Power Supply.
ADCMP350/ADCMP354/ADCMP356
Rev. B | 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
VCC (V)
ICC (µA)
05112-003
3.75 4.05 4.35 4.65 4.95 5.25
TA+125°C
TA +25°C
TA–40°C
TA+85°C
Figure 4. 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 5. VIN Trip Threshold vs. Temperature (VCC = 3.3 V)
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 6. VIN Trip Hysteresis vs. Temperature
0
4
6
8
10
12
14
16
18
20
02468 22
VIN (V)
SUPPLY CURRENT (µA)
05112-006
2
10 12 14 16 18 20
Figure 7. Supply Current vs. Input Voltage (VIN)
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 8. Input Leakage vs. Input Voltage (VIN)
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 9. VIN Leakage Current vs. VIN Voltage (VCC = 3.8 V)
ADCMP350/ADCMP354/ADCMP356
Rev. B | 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 10. Input Leakage vs. Supply Voltage, VCC (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
VCC (V)
3.75 4.05 4.35 4.65 4.95 5.25
500
VTRIP RISING
VTRIP FALLING
Figure 11. VIN Trip Threshold vs. VCC
2
4
8
10
12
14
16
18
20
HYSTERESIS (mV)
05112-020
6
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
0
HYSTERESIS
Figure 12. 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 13. 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 14. 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 15. Fall Time vs. Supply Voltage
ADCMP350/ADCMP354/ADCMP356
Rev. B | Page 8 of 12
10
20
40
50
60
70
80
90
100
SHORT-CIRCUIT SINK CURRENT (mA)
05112-013
30
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 16. Short-Circuit Sink Current vs. Supply Voltage
(VCC = 3.3 V, 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 17. Propagation Delay vs. Input Overdrive (VCC = 3.3 V, Push-Pull Only)
05112-015
CH1 20mV/DIV CH2 1.00V/DIV TIMEBASE: 10µs/DIV
1
2
CH1 = VIN
CH2 = VOUT
Figure 18. 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 19. Propagation Delay Timing, 100 mV Overdrive
ADCMP350/ADCMP354/ADCMP356
Rev. B | Page 9 of 12
APPLICATIONS INFORMATION
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 20, 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 is decreasing, the threshold is below VREF.
The upper input threshold level is given by
( )
PULLUP
CC
PULLUP
RR2
R1VRR2R1
+
−++
=
REF
IN_HI
V
V
where VREF = 0.6 V, assuming RLOAD >> R2, RPULLUP
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
PULLUP
RR2
R1
+
=∆
CC
IN
V
V
ADCMP354
OUT
VCC = 5V
RPULLUP
RLOAD
R2
R1
V
IN
VREF = 0.6V
05112-022
Figure 20. Noninverting Comparator Configuration with Added Hysteresis
VOLTAGE DETECTOR
The ADCMP350/ADCMP354/ADCMP356 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 21 shows the typical configuration of the ADCMP354
for monitoring a supply to indicate that the voltage is above a
certain level.
ADCMP354
OUT
V
CC
= 5V
R
PULLUP
R1
R2
V
IN
V
REF
= 0.6V
05112-023
Figure 21. Voltage Detector Application
ADCMP350/ADCMP354/ADCMP356
Rev. B | 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 22. 4-Lead Thin Shrink Small Outline Transistor Package [SC70]
(KS-4)
Dimensions shown in millimeters
ORDERING GUIDE
Model1Temperature Range Package Description
Package
Option Branding
ADCMP350YKS-REEL7 –40°C to +125°C 4-Lead Thin Shrink Small Outline Transistor Package [SC70] KS-4 M0Z
ADCMP350YKSZ-REEL7 –40°C to +125°C 4-Lead Thin Shrink Small Outline Transistor Package [SC70] KS-4 M55
ADCMP354YKS-REEL7 –40°C to +125°C 4-Lead Thin Shrink Small Outline Transistor Package [SC70] KS-4 M13
ADCMP354YKSZ-REEL7 –40°C to +125°C 4-Lead Thin Shrink Small Outline Transistor Package [SC70] KS-4 M56
ADCMP356YKS-REEL7 –40°C to +125°C 4-Lead Thin Shrink Small Outline Transistor Package [SC70] KS-4 M15
ADCMP356YKSZ-REEL7 –40°C to +125°C 4-Lead Thin Shrink Small Outline Transistor Package [SC70] KS-4 M8V
1 Z = RoHS Compliant Part.
ADCMP350/ADCMP354/ADCMP356
Rev. B | Page 11 of 12
NOTES
ADCMP350/ADCMP354/ADCMP356
Rev. B | Page 12 of 12
NOTES
©2004–2011 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D05112-0-4/11(B)
