Dual Low Power 1.5% Comparator
With 400 mV Reference
ADCMP670
FEATURES
FUNCTIONAL BLOCK DIAGRAM
VDD
400 mV ± 1.5% threshold
Supply range: 1.7 V to 5.5 V
Low quiescent current: 6.5 μA typical
Input range includes ground
Internal hysteresis: 8.9 mV typical
Low input bias current: ±10 nA maximum
Open-drain outputs
Supports wire-AND connections
Input polarities: one inverting and one noninverting
Low profile (1 mm) TSOT package
Drop-in replacement for the LT6700-1
ADCMP670-1
+INA
OUTA
400mV
OUTB
06493-001
–INB
GND
Figure 1.
APPLICATIONS
Li-Ion monitoring
Portable applications
Hand-held instruments
Window comparators
LED/relay driving
Optoisolator driving
Control systems
GENERAL DESCRIPTION
1A
1B
402
2A
2B
400
RISING INPUT
398
396
394
FALLING INPUT
392
390
388
TWO TYPICAL PARTS
COMP A AND COMP B
VDD = 5V
386
–40
–20
0
20
40
60
80
100
TEMPERATURE (°C)
120
06493-002
The ADCMP670 is currently available in one model, the
ADCMP670-1. This model has one inverting input and one
noninverting input, making it suitable for use as a window
comparator. The device is suitable for portable, commercial,
industrial, and automotive applications.
404
THRESHOLD VOLTAGE (mV)
The ADCMP670 consists of two low power, high accuracy,
comparator and reference circuits in a 6-lead TSOT package.
The internal 400 mV reference provides the ability to monitor
low voltage supplies. The device operates on a supply voltage
from 1.7 V to 5.5 V and draws only 6.5 μA typical, making it
suitable for low power system monitoring and portable applications. Hysteresis is included in the comparators. The comparator
outputs are open-drain and the output can be pulled up to any
voltage up to 5.5 V. The output stage is guaranteed to sink
greater than 5 mA over temperature.
Figure 2. Comparator Thresholds vs. Temperature
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2007-2009 Analog Devices, Inc. All rights reserved.
ADCMP670
TABLE OF CONTENTS
Features .............................................................................................. 1
Typical Performance Characteristics ..............................................8
Applications ....................................................................................... 1
Application Information ................................................................ 13
Functional Block Diagram .............................................................. 1
Comparators and Internal Reference ...................................... 13
General Description ......................................................................... 1
Power Supply............................................................................... 13
Revision History ............................................................................... 2
Inputs ........................................................................................... 13
Specifications..................................................................................... 3
Outputs ........................................................................................ 13
Absolute Maximum Ratings............................................................ 6
Adding Hysteresis....................................................................... 13
Thermal Resistance ...................................................................... 6
Outline Dimensions ....................................................................... 14
ESD Caution .................................................................................. 6
Ordering Guide .......................................................................... 14
Pin Configuration and Function Descriptions ............................. 7
REVISION HISTORY
7/09—Rev. 0 to Rev. A
Changes to Figure 12 ........................................................................ 9
2/07—Revision 0: Initial Version
Rev. A | Page 2 of 16
ADCMP670
SPECIFICATIONS
VDD = 1.7 V to 5.5 V, TA = 25°C, unless otherwise noted.
Table 1.
Parameter
THRESHOLDS 1
Rising Input Threshold Voltage
Falling Input Threshold Voltage
Hysteresis = VTH(R) – VTH(F)
INPUT CHARACTERISTICS
Input Bias Current
OPEN-DRAN OUTPUTS
Output Low Voltage 2
Output Leakage Current 3
DYNAMIC PERFORMANCE2, 4
High-to-Low Propagation Delay
Low-to-High Propagation Delay
Output Rise Time
Output Fall Time
POWER SUPPLY
Supply Current 5
Min
Typ
Max
Unit
Test Conditions/Comments
394
395
386
387
7
400
400
391.1
391.1
8.9
406
405
401
400
11
mV
mV
mV
mV
mV
VDD = 1.7 V
VDD = 5.5 V
VDD = 1.7 V
VDD = 5.5 V
0.01
4
10
10
nA
nA
VDD = 1.7 V, VIN = VDD
VDD = 1.7 V, VIN = 0.1 V
140
130
0.01
0.01
200
200
0.8
0.8
mV
mV
μA
μA
VDD = 1.7 V, IOUT = 3 mA
VDD = 5.5 V, IOUT = 5 mA
VDD =1.7 V, VOUT = VDD
VDD =1.7 V, VOUT = 5.5 V
μs
μs
μs
μs
VDD = 5.5 V, VOL = 400 mV
VDD = 5.5 V, VOH = 0.9 × VDD
VDD = 5.5 V, VO = (0.1 to 0.9) × VDD
VDD = 5.5 V, VO = (0.1 to 0.9) × VDD
μA
μA
VDD = 1.7 V
VDD = 5.5 V
10
8
0.5
0.07
5.7
6.5
10
11
1
RL = 100 kΩ, VO = 2 V swing.
10 mV input overdrive.
3
VIN = 40 mV overdrive.
4
RL = 10 kΩ.
5
No load current.
2
Rev. A | Page 3 of 16
ADCMP670
VDD = 1.7 V to 5.5 V, 0°C ≤ TA ≤ 70°C, unless otherwise noted.
Table 2.
Parameter
THRESHOLDS 1
Rising Input Threshold Voltage
Falling Input Threshold Voltage
Hysteresis = VTH(R) – VTH(F)
INPUT CHARACTERISTICS
Input Bias Current
Min
Typ
391
392.5
383.5
384.5
6.5
OPEN-DRAIN OUTPUTS
Output Low Voltage 2
Output Leakage Current 3
POWER SUPPLY
Supply Current 4
Max
Unit
Test Conditions/Comments
409
407.5
403.5
402.5
12.5
mV
mV
mV
mV
mV
VDD = 1.7 V
VDD = 5.5 V
VDD = 1.7 V
VDD = 5.5 V
15
15
nA
nA
VDD = 1.7 V, VIN = VDD
VDD = 1.7 V, VIN = 0.1 V
250
250
1
1
mV
mV
μA
μA
VDD = 1.7 V, IOUT = 3 mA
VDD = 5.5 V, IOUT = 5 mA
VDD =1.7 V, VOUT = VDD
VDD =1.7 V, VOUT = 5.5 V
13
14
μA
μA
VDD = 1.7 V
VDD = 5.5 V
Max
Unit
Test Conditions/Comments
410
408
404.5
403.5
13.0
mV
mV
mV
mV
mV
VDD = 1.7 V
VDD = 5.5 V
VDD = 1.7 V
VDD = 5.5 V
15
15
nA
nA
VDD = 1.7 V, VIN = VDD
VDD = 1.7 V, VIN = 0.1 V
250
250
1
1
mV
mV
μA
μA
VDD = 1.7 V, IOUT = 3 mA
VDD = 5.5 V, IOUT = 5 mA
VDD =1.7 V, VOUT = VDD
VDD =1.7 V, VOUT = 5.5 V
14
15
μA
μA
VDD = 1.7 V
VDD = 5.5 V
1
RL = 100 kΩ, VO = 2 V swing.
10 mV input overdrive.
VIN = 40 mV overdrive.
4
No load.
2
3
VDD = 1.7 V to 5.5 V, −40°C ≤ TA ≤ 85°C, unless otherwise noted.
Table 3.
Parameter
THRESHOLDS 1
Rising Input Threshold Voltage
Falling Input Threshold Voltage
Hysteresis = VTH(R) – VTH(F)
INPUT CHARACTERISTICS
Input Bias Current
OPEN-DRAIN OUTPUTS
Output Low Voltage 2
Output Leakage Current 3
POWER SUPPLY
Supply Current 4
Min
390
392
382.5
383.5
5.5
Typ
1
RL = 100 kΩ, VO = 2 V swing.
10 mV input overdrive.
3
VIN = 40 mV overdrive.
4
No load.
2
Rev. A | Page 4 of 16
ADCMP670
VDD = 1.7 V to 5.5 V, −40°C ≤ TA ≤ 125°C, unless otherwise noted.
Table 4.
Parameter
THRESHOLDS 1
Rising Input Threshold Voltage
Falling Input Threshold Voltage
Hysteresis = VTH(R) – VTH(F)
INPUT CHARACTERISTICS
Input Bias Current
OPEN-DRAIN OUTPUTS
Output Low Voltage 2
Output Leakage Current 3
POWER SUPPLY
Supply Current 4
Min
390
392
381.5
381.05
2
Typ
Max
Unit
Test Conditions/Comments
411
410
405.5
404.5
13.5
mV
mV
mV
mV
mV
VDD = 1.7 V
VDD = 5.5 V
VDD = 1.7 V
VDD = 5.5 V
45
45
nA
nA
VDD = 1.7 V, VIN = VDD
VDD = 1.7 V, VIN = 0.1 V
250
250
1
1
mV
mV
μA
μA
VDD = 1.7 V, IOUT = 3 mA
VDD = 5.5 V, IOUT = 5 mA
VDD = 1.7 V, VOUT = VDD
VDD = 1.7 V, VOUT = 5.5 V
16
17
μA
μA
VDD = 1.7 V
VDD= 5.5 V
1
RL = 100 kΩ, VO = 2 V swing.
10 mV input overdrive.
VIN = 40 mV overdrive.
4
No load.
2
3
Rev. A | Page 5 of 16
ADCMP670
ABSOLUTE MAXIMUM RATINGS
THERMAL RESISTANCE
Table 5.
Parameter
VDD
+INA, −INB
OUTA, OUTB
Output Short Circuit Duration1
Input Current
Operating Temperature Range
Storage Temperature Range
Lead Temperature
Soldering (10 sec)
Vapor Phase (60 sec)
Infrared (15 sec)
1
θJA is specified for the worst-case conditions, that is, a device
soldered in a circuit board for surface-mount packages.
Range
−0.3 V to +6 V
−0.3 V to +6 V
−0.3 V to +6 V
Indefinite
−10 mA
−40°C to +125°C
−65°C to +150°C
Table 6. Thermal Resistance
Package Type
6-Lead TSOT
ESD CAUTION
300°C
215°C
220°C
When the output is shorted indefinitely, the use of a heat sink may be required to
keep the junction temperature within the absolute maximum ratings.
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.
Rev. A | Page 6 of 16
θJA
200
Unit
°C/W
ADCMP670
OUTA
1
GND
2
+INA
3
ADCMP670-1
TOP VIEW
(Not to Scale)
6
OUTB
5
VDD
4
–INB
06493-003
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Figure 3. Pin Configuration
Table 7. Pin Function Descriptions
Pin No.
1
2
3
Mnemonic
OUTA
GND
+INA
4
−INB
5
6
VDD
OUTB
Description
Open-Drain Output for Comparator A.
Ground.
Monitors analog input voltage on Comparator A. Connected to noninverting input. The other input of Comparator A is
connected to a 400 mV reference.
Monitors analog input voltage on Comparator B. Connected to inverting input. The other input of Comparator B is
connected to a 400 mV reference.
Power Supply Pin.
Open-Drain Output for Comparator B.
Rev. A | Page 7 of 16
ADCMP670
TYPICAL PERFORMANCE CHARACTERISTICS
50
VDD = 5V
TA = 25°C
VDD = 5V
TA = 25°C
40
PERCENT OF UNITS (%)
40
30
20
FALLING INPUT THRESHOLD VOLTAGE (mV)
Figure 4. Distribution of Rising Input Threshold Voltage
Figure 7. Distribution of Falling Input Threshold Voltage
402
VDD = 5V
TA = 25°C
RISING INPUT THRESHOLD VOLTAGE (mV)
PERCENT OF UNITS (%)
30
25
20
15
10
5
6.0 6.4 6.8 7.2 7.6 8.0 8.4 8.8 9.2 9.6 10.0 10.4 10.8
HYSTERESIS (mV)
RISING INPUT THRESHOLD VOLTAGE (mV)
398
–20
0
20
40
60
80
400
399
401
FOUR TYPICAL PARTS
VDD = 5V
400
396
–40
= 1.8V
= 2.5V
= 3.3V
= 5.0V
–20
0
20
40
60
80
100
120
Figure 8. Rising Input Threshold Voltage vs. Temperature
100
120
TEMPERATURE (°C)
06493-006
RISING INPUT THRESHOLD VOLTAGE (mV)
402
1
2
3
4
VDD
VDD
VDD
VDD
TEMPERATURE (°C)
Figure 5. Distribution of Hysteresis
404
401
398
–40
06493-005
0
388 389 390 391 392 393 394 395 396 397 398 399 400
06493-007
0
06493-004
394 395 396 397 398 399 400 401 402 403 404 405 406
RISING INPUT THRESHOLD VOLTAGE (mV)
35
20
10
10
0
30
06493-008
PERCENT OF UNITS (%)
50
Figure 6. Rising Input Threshold Voltage vs. Temperature
TA = –40°C
400
TA = +25°C
399
TA = +85°C
398
397
TA = +125°C
396
395
1.7
2.2
2.7
3.2
3.7
4.2
4.7
5.2
5.7
SUPPLY VOLTAGE (V)
Figure 9. Rising Input Threshold Voltage vs. Supply Voltage
Rev. A | Page 8 of 16
06493-009
60
ADCMP670
12.0
11.5
11.0
10.5
1A
1B
2A
2B
11.0
10.5
10.0
9.5
9.0
HYSTERESIS (mV)
FOUR TYPICAL PARTS
VDD = 5V
8.5
8.0
7.5
7.0
6.5
6.0
5.5
5.0
4.5
VDD
VDD
VDD
VDD
10.0
9.5
9.0
= 1.8V
= 2.5V
= 3.3V
= 5.0V
8.5
8.0
7.5
7.0
6.5
6.0
5.5
5.0
4.5
–20
0
20
40
60
80
100
120
TEMPERATURE (°C)
4.0
–40
06493-010
4.0
–40
–20
0
20
40
60
80
100
120
TEMPERATURE (°C)
Figure 10. Hysteresis vs. Temperature
06493-013
HYSTERESIS (mV)
12.0
11.5
Figure 13. Hysteresis vs. Temperature
12
1
TA = +125°C
11
0
THRESHOLD SHIFT (mV)
TA = +25°C
9
TA = +85°C
8
7
TA = –40°C
6
TA = –40°C
TA = +25°C
TA = +85°C
TA = +125°C
–1
–2
–3
2.2
2.7
3.2
3.7
4.2
4.7
5.2
5.7
SUPPLY VOLTAGE (V)
–5
1.5
06493-011
4
1.7
1.9
2.0
2.1
2.2
2.3
2.4
2.5
50
NO LOAD CURRENT
8
SUPPLY CURRENT (µA)
40
TA = +125°C
TA = +85°C
7
TA = +25°C
6
TA = –40°C
2.2
2.7
30
20
TA = +25°C
10
5
3.2
3.7
4.2
4.7
5.2
SUPPLY VOLTAGE (V)
06493-012
SUPPLY CURRENT (µA)
1.8
Figure 14. Minimum Supply Voltage
9
4
1.7
1.7
SUPPLY VOLTAGE (V)
Figure 11. Hysteresis vs. Supply Voltage
10
1.6
06493-014
–4
5
0
TA = +85°C
TA = +125°C
TA = –40°C
0
0.5
1.0
SUPPLY VOLTAGE (V)
Figure 15. Startup Supply Current
Figure 12. Quiescent Supply Current vs. Supply Voltage
Rev. A | Page 9 of 16
1.5
06493-015
HYSTERESIS (mV)
10
ADCMP670
1000
100
10
1
0.001
0.01
0.1
1
10
100
OUTPUT SINK CURRENT (mA)
TA = 25°C
10
1
0.001
0.01
0.1
10k
= 5.0V
= 3.3V
= 2.5V
= 1.7V
1k
100
10
100
OUTPUT SINK CURRENT (mA)
TA = –40°C
0.1
–0.3
06493-018
1
–0.2
Figure 20. Below Ground Input Bias Current
3
10
TA = +125°C
TA = +85°C
TA = +25°C
TA = –40°C
–1
–3
–5
0
0.2
0.4
0.6
0.8
INPUT VOLTAGE (V)
1.0
06493-020
CURRENT IS POSITIVE
GOING INTO THE DEVICE.
VDD = 5V
0V < VIB < 1V
Figure 18. Low Level Input Bias Current
TA = +125°C
1
TA = +85°C
TA = +25°C
0.1
0.01
TA = –40°C
CURRENT IS GOING INTO THE DEVICE
VDD = 5V
VIB > 1V
1
2
3
4
INPUT VOLTAGE (V)
Figure 21. High Level Input Bias Current
Rev. A | Page 10 of 16
5
06493-021
INPUT BIAS CURRENT (nA)
1
INPUT BIAS CURRENT (nA)
0
–0.1
INPUT VOLTAGE (V)
Figure 17. Supply Current vs. Output Sink Current
–7
TA = +85°C
TA = +25°C
10
1
0.1
100
CURRENT IS GOING
OUT OF THE DEVICE.
VDD = 5V
–0.3V < VIB < 0V
TA = +125°C
10
0.01
10
Figure 19. Supply Current vs. Output Sink Current
100
1
0.001
1
OUTPUT SINK CURRENT (mA)
INPUT BIAS CURRENT (nA)
SUPPLY CURRENT (µA)
VDD
VDD
VDD
VDD
TA = 85°C
= 5.0V
= 3.3V
= 2.5V
= 1.7V
100
Figure 16. Supply Current vs. Output Sink Current
1000
VDD
VDD
VDD
VDD
06493-017
SUPPLY CURRENT (µA)
= 5.0V
= 3.3V
= 2.5V
= 1.7V
06493-019
VDD
VDD
VDD
VDD
TA = –40°C
06493-016
SUPPLY CURRENT (µA)
1000
ADCMP670
1000
100
10
1
0.001
0.01
0.1
1
10
OUTPUT SINK CURRENT (mA)
10
0.1
1
10
Figure 25. Output Saturation Voltage vs. Output Sink Current
80
TA = 85°C
VDD = 5.0V
VDD = 3.3V
VDD = 2.5V
VDD = 1.8V
VDD = 5V
SHORT-CIRCUIT CURRENT (mA)
10
TA = –40°C
TA = +25°C
70
100
60
50
TA = +85°C
TA = +125°C
40
30
20
0.1
1
10
OUTPUT SINK CURRENT (mA)
0
0
Figure 23. Output Saturation Voltage vs. Output Sink Current
70
OUTPUT LEAKAGE CURRENT (nA)
60
50
VDD = 3.3V
30
VDD = 2.5V
20
VDD = 1.8V
0
2
4
OUTPUT VOLTAGE (V)
06493-026
10
0
VDD = 5V
VDD = 5.0V
40
4
Figure 26. Output Short-Circuit Current
10
TA = 25°C
2
OUTPUT VOLTAGE (V)
Figure 24. Output Short-Circuit Current
TA = +125°C
1
TA = +85°C
TA = +25°C
0.1
TA = –40°C
0.01
0.001
0
1
2
3
OUTPUT VOLTAGE (V)
Figure 27. Output Leakage Current
Rev. A | Page 11 of 16
4
5
06493-027
0.01
06493-025
10
1
0.001
SHORT-CIRCUIT CURRENT (mA)
0.01
OUTPUT SINK CURRENT (mA)
06493-024
OUTPUT SATURATION VOLTAGE (mV)
100
1
0.001
Figure 22. Output Saturation Voltage vs. Output Sink Current
1000
TA = –40°C
VDD = 5.0V
VDD = 3.3V
VDD = 2.5V
VDD = 1.8V
06493-023
OUTPUT SATURATION VOLTAGE (mV)
TA = 25°C
VDD = 5.0V
VDD = 3.3V
VDD = 2.5V
VDD = 1.8V
06493-022
OUTPUT SATURATION VOLTAGE (mV)
1000
ADCMP670
60
RISE AND FALL TIMES (µs)
50
40
30
20
VDD = 5V
CL = 20pF
TA = 25°C
10
RISE
1
0.1
10
0
20
40
60
80
100
INPUT OVERDRIVE (mV)
06493-028
0
FALL
Figure 28. Propagation Delay vs. Input Overdrive
2
INV (OUTB)
3
VIN (+INA, –INB)
M20.0µs
CH1
7mV
06493-029
1
CH2 5.00V
1
10
100
1000
OUTPUT PULL-UP RESISTOR (kΩ)
Figure 30. Rise and Fall Times vs. Output Pull-Up Resistor
NON INV (OUTA)
CH1 50.0mV
CH3 5.00V
0.01
0.1
Figure 29. Noninverting and Inverting Comparators Propagation Delay
Rev. A | Page 12 of 16
06493-030
PROPAGATION DELAY (µs)
100
LH NONINV
LH INV
HL NONINV
HL INV
TA = 25°C
ADCMP670
APPLICATION INFORMATION
The ADCMP670 is a dual low power comparator with a
built-in 400 mV reference that operates from 1.7 V to 5.5 V.
The comparator is 1.5% accurate with a built-in hysteresis of
8.9 mV. The outputs are open-drain, capable of sinking 40 mA.
COMPARATORS AND INTERNAL REFERENCE
Each comparator has one input available externally.
Comparator A has a noninverting input and Comparator B has
an inverting input available. The other comparator inputs are
connected internally to the 400 mV reference. The rising input
threshold voltage of the comparators is designed to be equal to
that of the reference.
POWER SUPPLY
OUTPUTS
The comparator outputs are open-drain and are also limited to
the maximum specified VDD voltage range, regardless of the VDD
voltage. These outputs are capable of sinking up to 40 mA.
Outputs can be tied together to provide a window comparator
with a single output.
ADDING HYSTERESIS
To prevent oscillations at the output caused by noise or
slowly moving signals passing the switching threshold, each
comparator has built-in hysteresis of approximately 8.9 mV.
Positive feedback can be used to increase hysteresis to the
noninverting comparator.
The ADCMP670 is designed to operate from 1.7 V to 5.5 V.
A 0.1 μF decoupling capacitor is recommended between VDD
and GND.
INPUTS
The comparator inputs are limited to the maximum VDD voltage
range. The voltage on these inputs can be above VDD but never
above the maximum allowed VDD voltage. When adding a
resistor string to the input, care must be taken when choosing
resistor values. This is due to the fact that the input bias current
will be in parallel with the bottom resistor of the string. This
bottom resistor must therefore be chosen first to control the
error introduced by this bias current.
Rev. A | Page 13 of 16
ADCMP670
OUTLINE DIMENSIONS
2.90 BSC
6
5
4
2.80 BSC
1.60 BSC
1
2
PIN 1
INDICATOR
3
0.95 BSC
1.90
BSC
*1.00 MAX
0.10 MAX
0.50
0.30
SEATING
PLANE
0.20
0.08
8°
4°
0°
0.60
0.45
0.30
*COMPLIANT TO JEDEC STANDARDS MO-193-AA WITH
THE EXCEPTION OF PACKAGE HEIGHT AND THICKNESS.
102808-A
*0.90
0.87
0.84
Figure 31. . 6-Lead Thin Small Outline Transistor Package [TSOT]
(UJ-6)
Dimensions shown in millimeters
ORDERING GUIDE
Model
ADCMP670-1YUJZ-RL71
1
Temperature Range
–40°C to +125°C
Package Description
6-Lead Thin Small Outline Transistor Package [TSOT]
Z = RoHS Compliant Part.
Rev. A | Page 14 of 16
Package Option
UJ-6
Branding
M97
ADCMP670
NOTES
Rev. A | Page 15 of 15
ADCMP670
NOTES
©2007-2009 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D06493-0-7/09(A)
Rev. A | Page 16 of 16
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