AD ADCMP361 Comparator and reference with dual polarity output Datasheet

FEATURES
FUNCTIONAL BLOCK DIAGRAM
400 mV ± 0.275% threshold
Supply range: 1.7 V to 5.5 V
Low quiescent current: 6.5 µA typical
Input range includes ground
Internal hysteresis: 9.3 mV typical
Low input bias current: ±5 nA maximum
Dual open-drain outputs
Small SOT-23 package
Qualified for automotive applications
VDD
ADCMP361
IN
OUT
400mV
OUT
06496-001
Data Sheet
Single 0.275% Comparator and Reference
with Dual Polarity Outputs
ADCMP361
GND
APPLICATIONS
Figure 1.
Li-Ion monitoring
Threshold detectors
Relay driving
Optoisolator driving
Industrial control systems
Handheld instruments
GENERAL DESCRIPTION
There are dual open-drain outputs to enable the comparator
and reference circuit to be used in an inverting or noninverting
configuration. The outputs can be pulled to any voltage up to a
maximum of 5.5 V. The output stage is guaranteed to sink greater
than 5 mA over temperature
The device is suitable for portable, commercial, industrial, and
automotive applications.
R1
4.7MΩ
VDD
IN
3V +
Li-Ion
CELL
R3
1MΩ
ADCMP361
+
OUT
–
R2
1MΩ
OUT
400mV
C1
100nF
GND
06496-029
The ADCMP361 is a single low power, high accuracy comparator with a 400 mV reference in a 5-lead SOT-23 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 only draws 6.5 µA typical, making it suitable
for low power system monitoring and portable applications.
Hysteresis is included in the comparators.
Figure 2. Typical Li-Ion Monitoring Application
DISCHARGING
VBATT
2.280V
CHARGING
2.271V
06496-030
VOUT
Figure 3. Li-Ion Monitoring Waveforms
Rev. B
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Tel: 781.329.4700 ©2007–2014 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
ADCMP361
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Typical Performance Characteristics ..............................................6
Applications ....................................................................................... 1
Application Information ................................................................ 11
Functional Block Diagram .............................................................. 1
Comparators and Internal Reference ...................................... 11
General Description ......................................................................... 1
Power Supply............................................................................... 11
Revision History ............................................................................... 2
Inputs ........................................................................................... 11
Specifications..................................................................................... 3
Outputs ........................................................................................ 11
Absolute Maximum Ratings............................................................ 4
Adding Hysteresis....................................................................... 11
Thermal Characteristics .............................................................. 4
Outline Dimensions ....................................................................... 12
ESD Caution .................................................................................. 4
Ordering Guide .......................................................................... 12
Pin Configuration and Function Descriptions ............................. 5
Automotive Products ................................................................. 12
REVISION HISTORY
5/14—Rev. A to Rev. B
Changes to Adding Hysteresis Section and Added Figure 32;
Renumbered Sequentially.............................................................. 11
3/11—Rev. 0 to Rev. A
Changes to Features Section............................................................ 1
Changes to Adding Hysteresis Section ........................................ 11
Added Figure 31, Renumbered Sequentially .............................. 10
Updated Outline Dimensions ....................................................... 12
Changes to Ordering Guide .......................................................... 12
Added Automotive Products Section .......................................... 12
2/07—Revision 0: Initial Version
Rev. B | Page 2 of 12
Data Sheet
ADCMP361
SPECIFICATIONS
VDD = 1.7 V to 5.5 V, −40°C ≤ TA ≤ +125°C, unless otherwise noted.
Table 1.
Parameter
THRESHOLDS 1
Rising Input Threshold Voltage
Falling Input Threshold Voltage
Hysteresis = VTH(R) – VTH(F)
Threshold Voltage Accuracy
Threshold Voltage Temperature Coefficient
POWER SUPPLY
Supply Current
INPUT CHARACTERISTICS
Input Bias Current
OPEN-DRAIN OUTPUTS
Output Low Voltage 2
Output Leakage Current 3
DYNAMIC PERFORMANCE
High-to-Low Propagation Delay2, 4
Low-to-High Propagation Delay2, 4
Output Rise time2, 4
Output Fall time2, 4
Min
399.3
391.2
393.1
393.1
381.1
381.2
381.0
2
Typ
400.4
400.4
400.4
400.4
391.1
391.1
391.1
9.3
Max
401.5
407.7
405.9
405.8
400.9
398.4
398.2
13.5
±0.275
16
Unit
Test Conditions/Comments
mV
mV
mV
mV
mV
mV
mV
mV
%
ppm/°C
VDD = 3.3 V, TA = 25°C
VDD = 1.7 V
VDD = 3.3 V
VDD = 5.5 V
VDD = 1.7 V
VDD = 3.3 V
VDD = 5.5 V
TA = 25°C, VDD = 3.3 V
6.5
7.0
9
10
µA
µA
VDD = 1.7 V
VDD = 5.5 V
0.01
0.01
5
5
nA
nA
VDD = 1.7 V, VIN = VDD
VDD = 1.7 V, VIN = 0.1 V
140
140
0.01
0.01
220
220
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
µs
µs
µs
µs
VDD = 5 V, VOL = 400 mV
VDD = 5 V, VOH = 0.9 × VDD
VDD = 5 V, VO = (0.1 to 0.9) × VDD
VDD = 5 V, VO = (0.1 to 0.9) × VDD
10
8
0.5
0.07
RL = 100 kΩ, VO = 2 V swing.
10 mV input overdrive.
3
VIN = 40 mV overdrive.
4
RL = 10 kΩ.
1
2
Rev. B | Page 3 of 12
ADCMP361
Data Sheet
ABSOLUTE MAXIMUM RATINGS
THERMAL CHARACTERISTICS
Table 2.
Parameter
VDD
IN
OUT, OUT
Operating Temperature Range
Storage Temperature Range
Lead Temperature
Soldering (10 sec)
Vapor Phase (60 sec)
Infrared (15 sec)
θJA is specified for the worst-case conditions, that is, a device
soldered in a circuit board for surface-mount packages.
Rating
−0.3 V to +6 V
−0.3 V to +6 V
−0.3 V to +6 V
−40°C to +125°C
−65°C to +150°C
Table 3. Thermal Resistance
Package Type
5-Lead SOT-23
ESD CAUTION
300°C
215°C
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.
Rev. B | Page 4 of 12
θJA
240
Unit
°C/W
Data Sheet
ADCMP361
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
OUT
1
5
OUT
4
VDD
GND
2
IN
3
TOP VIEW
(Not to Scale)
06496-002
ADCMP361
Figure 4. Pin Configuration
Table 4. Pin Function Descriptions
Pin No.
1
2
3
4
5
Mnemonic
OUT
GND
IN
VDD
OUT
Description
Noninverting Open-Drain Output.
Ground.
Monitors analog input voltage on comparator. The other input of the comparator is connected to a 400 mV reference.
Power Supply.
Inverting Open-Drain Output.
Rev. B | Page 5 of 12
ADCMP361
Data Sheet
TYPICAL PERFORMANCE CHARACTERISTICS
50
60
VDD = 5V
TA = 25°C
VDD = 5V
TA = 25°C
40
PERCENT OF UNITS (%)
40
30
20
RISING INPUT THRESHOLD VOLTAGE (mV)
0
388 389 390 391 392 393 394 395 396 397 398 399 400
FALLING INPUT THRESHOLD VOLTAGE (mV)
Figure 8. Distribution of Falling Input Threshold Voltage
35
404
RISING INPUT THRESHOLD VOLTAGE (mV)
VDD = 5V
TA = 25°C
30
25
20
15
10
0
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)
TA = –40°C
400
TA = +25°C
HYSTERESIS (mV)
399
TA = +85°C
398
397
TA = +125°C
3.2
3.7
4.2
4.7
5.2
5.7
SUPPLY VOLTAGE (V)
06496-007
396
2.7
–20
0
20
40
60
80
100
120
Figure 9. Rising Input Threshold Voltage vs. Temperature
401
2.2
398
TEMPERATURE (°C)
Figure 6. Distribution of Hysteresis
395
1.7
FOUR TYPICAL PARTS
VDD = 5V
400
396
–40
06496-004
5
402
1
2
3
4
06496-005
Figure 5. Distribution of Rising Input Threshold Voltage
06496-006
394 395 396 397 398 399 400 401 402 403 404 405 406
06496-003
0
PERCENT OF UNITS (%)
20
10
10
RISING INPUT THRESHOLD VOLTAGE (mV)
30
Figure 7. Rising Input Threshold Voltage vs. Supply Voltage
12.0
11.5
11.0
10.5
10.0
9.5
9.0
8.5
8.0
7.5
7.0
6.5
6.0
5.5
5.0
4.5
4.0
–40
VDD
VDD
VDD
VDD
–20
= 1.8V
= 2.5V
= 3.3V
= 5.0V
0
20
40
60
80
TEMPERATURE (°C)
Figure 10. Hysteresis vs. Temperature
Rev. B | Page 6 of 12
100
120
06496-010
PERCENT OF UNITS (%)
50
Data Sheet
ADCMP361
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
–4
5
2.7
2.2
3.2
3.7
4.2
5.7
5.2
4.7
SUPPLY VOLTAGE (V)
–5
1.5
06496-008
4
1.7
1.7
1.6
1.8
1.9
2.0
2.1
2.2
2.3
2.4
2.5
SUPPLY VOLTAGE (V)
06496-011
HYSTERESIS (mV)
10
Figure 14. Minimum Supply Voltage
Figure 11. Hysteresis vs. Supply Voltage
50
10
NO LOAD CURRENT
40
8
TA = +125°C
7
TA = +25°C
6
TA = –40°C
2.7
TA = +25°C
3.2
3.7
4.2
5.2
4.7
SUPPLY VOLTAGE (V)
TA = +85°C
TA = +125°C
TA = –40°C
0
06496-009
2.2
20
10
5
4
1.7
30
0
0.5
Figure 12. Quiescent Supply Current vs. Supply Voltage
1000
VDD
VDD
VDD
VDD
1000
= 5.0V
= 3.3V
= 2.5V
= 1.7V
SUPPLY CURRENT (µA)
TA = 25°C
100
10
1
0.001
0.01
0.1
1
10
OUTPUT SINK CURRENT (mA)
1.5
Figure 15. Start-Up Supply Current
100
06496-013
SUPPLY CURRENT (µA)
TA = –40°C
1.0
SUPPLY VOLTAGE (V)
Figure 13. Supply Current vs. Output Sink Current
VDD
VDD
VDD
VDD
= 5.0V
= 3.3V
= 2.5V
= 1.7V
100
10
1
0.001
0.01
0.1
1
10
OUTPUT SINK CURRENT (mA)
Figure 16. Supply Current vs. Output Sink Current
Rev. B | Page 7 of 12
100
06496-014
TA = +85°C
06496-012
SUPPLY CURRENT (µA)
SUPPLY CURRENT (mA)
9
ADCMP361
Data Sheet
10k
VDD
VDD
VDD
VDD
= 5.0V
= 3.3V
= 2.5V
= 1.7V
1k
100
10
100
TA = +85°C
TA = +25°C
10
1
0.01
0.1
1
10
100
OUTPUT SINK CURRENT (mA)
TA = –40°C
0.1
–0.3
06496-015
1
0.001
0
Figure 20. Below Ground Input Bias Current
10
3
INPUT BIAS CURRENT (nA)
1
TA = +125°C
TA = +85°C
TA = +25°C
TA = –40°C
–1
–3
TA = +125°C
1
TA = +85°C
TA = +25°C
0.1
CURRENT IS POSITIVE
GOING INTO THE DEVICE.
VDD = 5V
0V < VIB < 1V
0.2
0.4
0.6
0.8
1.0
INPUT VOLTAGE (V)
0.01
1
1000
TA = 25°C
OUTPUT SATURATION VOLTAGE (mV)
= 5.0V
= 3.3V
= 2.5V
= 1.8V
100
0.1
1
10
OUTPUT SINK CURRENT (mA)
06496-019
10
0.01
5
Figure 21. High Level Input Bias Current
1000
1
0.001
4
INPUT VOLTAGE (V)
Figure 18. Low Level Input Bias Current
VDD
VDD
VDD
VDD
3
2
06496-018
CURRENT IS GOING INTO THE DEVICE
VDD = 5V
VIB > 1V
–7
0
TA = –40°C
Figure 19. Output Saturation Voltage vs. Output Sink Current
TA = –40°C
VDD = 5.0V
VDD = 3.3V
VDD = 2.5V
VDD = 1.8V
100
10
1
0.001
0.01
0.1
1
10
OUTPUT SINK CURRENT (mA)
Figure 22. Output Saturation Voltage vs. Output Sink Current
Rev. B | Page 8 of 12
06496-020
–5
06496-017
INPUT BIAS CURRENT (nA)
–0.1
–0.2
INPUT VOLTAGE (V)
Figure 17. Supply Current vs. Output Sink Current
OUTPUT SATURATION VOLTAGE (mV)
CURRENT IS GOING
OUT OF THE DEVICE.
VDD = 5V
–0.3V < VIB < 0V
TA = +125°C
INPUT BIAS CURRENT (nA)
SUPPLY CURRENT (µA)
TA = 85°C
06496-016
1000
Data Sheet
ADCMP361
80
TA = 85°C
VDD = 5.0V
VDD = 3.3V
VDD = 2.5V
VDD = 1.8V
VDD = 5V
SHORT-CIRCUIT CURRENT (mA)
100
10
60
50
TA = +85°C
TA = +125°C
40
30
20
1
10
0
0
Figure 26. Short-Circuit Current vs. Output Voltage
10
TA = 25°C
VDD = 5V
VDD = 5.0V
OUTPUT LEAKAGE CURRENT (nA)
60
50
VDD = 3.3V
40
30
VDD = 2.5V
20
VDD = 1.8V
10
2
0
4
OUTPUT VOLTAGE (V)
TA = +125°C
1
TA = +85°C
TA = +25°C
0.1
TA = –40°C
0.01
0.001
06496-023
0
4
OUTPUT VOLTAGE (V)
Figure 23. Output Saturation Voltage vs. Output Sink Current
70
2
06496-022
0.1
0
1
2
3
4
5
OUTPUT VOLTAGE (V)
Figure 24. Short-Circuit Current vs. Output Voltage
06496-024
0.01
OUTPUT SINK CURRENT (mA)
Figure 27. Output Leakage Current vs. Output Voltage
100
60
LH NONINV
LH INV
HL NONINV
HL INV
TA = 25°C
RISE AND FALL TIMES (µs)
50
VDD = 5V
CL = 20pF
TA = 25°C
40
30
20
10
RISE
1
0.1
10
0
0
20
40
60
80
INPUT OVERDRIVE (mV)
100
06496-025
FALL
Figure 25. Propagation Delay vs. Input Overdrive
0.01
0.1
1
10
100
1000
OUTPUT PULL-UP RESISTOR (kΩ)
Figure 28. Rise and Fall Times vs. Output Pull-Up Resistor
Rev. B | Page 9 of 12
06496-027
SHORT-CIRCUIT CURRENT (mA)
TA = –40°C
10
1
0.001
PROPAGATION DELAY (µs)
TA = +25°C
70
06496-021
OUTPUT SATURATION VOLTAGE (mV)
1000
ADCMP361
Data Sheet
NON INV (OUTA)
2
INV (OUTB)
3
VIN (+INA, –INB)
CH1 50.0mV
CH3 5.00V
CH2 5.00V
M20.0µs
CH1
7mV
06496-026
1
Figure 29. Noninverting and Inverting Comparators Propagation Delay
Rev. B | Page 10 of 12
Data Sheet
ADCMP361
APPLICATION INFORMATION
The ADCMP361 is a low power comparator and reference
circuit featuring a 400 mV reference that operates from 1.7 V
to 5.5 V. The comparator is 0.275% accurate with a built-in
hysteresis of 9.3 mV. There are two outputs, one the inverse
of the other. This enables the ADCMP361 to be used as an
inverting or a noninverting comparator circuit. These opendrain outputs are capable of sinking 40 mA.
the input voltage is increasing, the threshold is above VREF, and
when it is decreasing, the threshold is below VREF. VIN_HI is the
high input threshold used to trigger the output low to high
transmission. VIN_LO is the low input threshold used to trigger
the output high to low transmission.
The upper input threshold level is given by
VIN_HI =
COMPARATORS AND INTERNAL REFERENCE
The comparator has one input available externally; the other
comparator input is 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.
The lower input threshold level is given by
VIN_LO =
VREF (R1 + R2 + RPULLUP ) − VCC R1
R2 + RPULLUP
The hysteresis is the difference between these voltage levels and
is given by
INPUTS
∆VIN =
The comparator input is 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, take care when choosing resistor values. This
is due to the fact that the input bias current will be in parallel
with the bottom resistor, R2, of the input resistor divider string.
This bottom resistor must therefore be chosen carefully in order
to reduce the error introduced by this bias current (see Figure 30).
R2
assuming RLOAD >> R2, RPULLUP where VREF = 0.4 V.
POWER SUPPLY
The ADCMP361 is designed to operate from 1.7 V to 5.5 V. A 100 nF
decoupling capacitor is recommended between VDD and GND.
VREF (R1+ R2 )
VCC R1
R2 + RPULLUP
VDD
ADCMP361
VIN
RPULLUP
OUT
R1
RLOAD
OUT
VREF = 0.4V
R2
ADCMP361
R1
Figure 31. Comparator Configuration with Added Hysteresis
IN
OUT
R2
06496-031
VDD
VIN
VCC = 5V
IBIAS
OUT
ADCMP361
VREF
Figure 30. Input Bias Current Effect on Input Resistor String
VIN
OUTPUTS
IN–
OUT
IN+
R1 = 200kΩ
The open-drain comparator outputs are limited to the
maximum specified VDD voltage range, regardless of the
VDD voltage. These outputs are capable of sinking up 40 mA.
R2 = 1MΩ
VOUT
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 9.3 mV. Positive
feedback can be used to increase hysteresis.
For the configuration shown in Figure 31, two resistors are used
to create different switching thresholds, depending on whether
the input signal is increasing or decreasing in magnitude. When
Rev. B | Page 11 of 12
VIN_LO
VIN_HI
VIN
06496-132
GND
06496-028
400mV
Figure 32. Noninverting Comparator Configuration with Hysteresis
ADCMP361
Data Sheet
OUTLINE DIMENSIONS
3.00
2.90
2.80
1.70
1.60
1.50
5
1
4
2
3.00
2.80
2.60
3
0.95 BSC
1.90
BSC
1.45 MAX
0.95 MIN
0.15 MAX
0.05 MIN
0.50 MAX
0.35 MIN
0.20 MAX
0.08 MIN
SEATING
PLANE
10°
5°
0°
0.60
BSC
COMPLIANT TO JEDEC STANDARDS MO-178-AA
0.55
0.45
0.35
11-01-2010-A
1.30
1.15
0.90
Figure 33. 5-Lead Small Outline Transistor Package [SOT-23]
(RJ-5)
Dimensions shown in millimeters
ORDERING GUIDE
Model 1, 2
ADCMP361YRJZ-REEL7
ADCMP361WRJZ-RL7
1
2
Temperature Range
–40°C to +125°C
–40°C to +125°C
Package Description
5-Lead SOT-23
5-Lead SOT-23
Package Option
RJ-5
RJ-5
Branding
M99
M99
Z = RoHS Compliant Part.
W = Qualified for Automotive Applications.
AUTOMOTIVE PRODUCTS
The ADCMP361W models are available with controlled manufacturing to support the quality and reliability requirements of automotive
applications. Note that these automotive models may have specifications that differ from the commercial models; therefore, designers
should review the Specifications section of this data sheet carefully. Only the automotive grade products shown are available for use in
automotive applications. Contact your local Analog Devices account representative for specific product ordering information and to
obtain the specific Automotive Reliability reports for these models.
©2007–2014 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D06496-0-5/14(B)
Rev. B | Page 12 of 12