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INA200-Q1, INA201-Q1, INA202-Q1
SBOS558C – APRIL 2011 – REVISED APRIL 2016
INA20x-Q1 Automotive Grade, –16-V to +80-V, Low- or High-Side, High-Speed,
Voltage-Output, Current-Sense Amplifier With Comparator and Reference
1 Features
3 Description
•
•
The INA200-Q1, INA201-Q1, and INA202-Q1
(INA20x-Q1) are low- or high-side current-shunt
monitors with voltage output. The INA20x-Q1 devices
can sense drops across shunts at common-mode
voltages from –16 V to +80 V. The INA20x-Q1 are
available with three output voltage scales: 20 V/V, 50
V/V, and 100 V/V, with up to a 500-kHz bandwidth.
1
•
•
•
•
•
Qualified for Automotive Applications
AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1: –40°C to 125°C
Ambient Operating Temperature Range
– Device HBM ESD Classification Level H2
– Device CDM ESD Classification Level C3B
Current-Sense Amplifier:
– Common-Mode Range: –16 V to +80 V
– 3.5% Max Error Over Temperature
– Bandwidth: 500 kHz (INA200-Q1)
– Three Gain Options:
– 20 V/V (INA200-Q1)
– 50 V/V (INA201-Q1)
– 100 V//V (INA202-Q1)
Integrated Open-Drain Comparator
– Latching Capability
– 0.6-V Internal Voltage Reference
Quiescent Current: 1800 μA (Max)
Latch-Up Exceeds 100 mA per JESD78
Package: VSSOP-8
The INA20x-Q1 also incorporate an open-drain
comparator and internal reference that provides a
0.6-V threshold. External dividers set the current trip
point. The comparator includes a latching capability,
and can be made transparent by grounding (or
leaving open) the RESET pin.
The INA20x-Q1 operate from a single 2.7-V to 18-V
supply, drawing a maximum of 1800 μA of supply
current. These devices are available in the very small
VSSOP-8 package. Specifications for all devices
extend over the operating temperature range of
–40°C to +125°C.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
INA200-Q1
INA201-Q1
VSSOP (8)
3.00 mm x 3.00 mm
INA202-Q1
2 Applications
•
•
•
•
(1) For all available packages, see the package option addendum
at the end of the data sheet.
Electric Power Steering (EPS) Systems
Body Control Modules
Brake Systems
Electronic Stability Control (ESC) Systems
Simplified Schematic
1
INA200-Q1 (G = 20)
INA201-Q1 (G = 50)
INA202-Q1 (G = 100)
VS
2 OUT
G
VIN+
8
VIN–
7
0.6-V
Reference
3 CMPIN
Comparator
4
CMPOUT 6
GND
RESET 5
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
INA200-Q1, INA201-Q1, INA202-Q1
SBOS558C – APRIL 2011 – REVISED APRIL 2016
www.ti.com
Table of Contents
1
2
3
4
5
6
7
Features ..................................................................
Applications ...........................................................
Description .............................................................
Revision History.....................................................
Device Comparison Table.....................................
Pin Configuration and Functions .........................
Specifications.........................................................
1
1
1
2
3
3
4
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
4
4
4
4
5
6
6
7
Absolute Maximum Ratings ......................................
ESD Ratings..............................................................
Recommended Operating Conditions.......................
Thermal Information ..................................................
Electrical Characteristics: Current-Shunt Monitor ....
Electrical Characteristics: Comparator.....................
Electrical Characteristics: General...........................
Typical Characteristics ..............................................
8
Parameter Measurement Information ................ 11
9
Detailed Description ............................................ 12
8.1 Hysteresis ............................................................... 11
9.1
9.2
9.3
9.4
Overview .................................................................
Functional Block Diagram .......................................
Feature Description.................................................
Device Functional Modes........................................
12
12
13
13
10 Application Information ...................................... 14
10.1 Application Information.......................................... 14
10.2 Typical Applications .............................................. 18
11 Power Supply Recommendations ..................... 22
12 Layout................................................................... 22
12.1 Layout Guidelines ................................................. 22
12.2 Layout Example .................................................... 22
13 Device and Documentation Support ................. 23
13.1
13.2
13.3
13.4
13.5
Related Links ........................................................
Community Resources..........................................
Trademarks ...........................................................
Electrostatic Discharge Caution ............................
Glossary ................................................................
23
23
23
23
23
14 Mechanical, Packaging, and Orderable
Information ........................................................... 23
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision B (November 2012) to Revision C
Page
•
Added Device Information andESD Ratings, and Thermal Information tables, and Feature Description, Device
Functional Modes, Application and Implementation, Power Supply Recommendations, Layout, Device and
Documentation Support, and Mechanical, Packaging, and Orderable Information sections ................................................. 1
•
Updated data sheet title.......................................................................................................................................................... 1
•
Updated Features bullets for clarity........................................................................................................................................ 1
•
Changed MSOP to VSSOP throughout data sheet to match industry-standard term............................................................ 1
•
Updated Applications bullets .................................................................................................................................................. 1
•
Updated Description section text for clarity ........................................................................................................................... 1
•
Changed all figures in data sheet to show Q1 device names ................................................................................................ 1
•
Changed pin names in Absolute Maximum Ratings to show correct names ......................................................................... 4
•
Added Operating Temperature to Absolute Maximum Ratings table ..................................................................................... 4
•
Changed CMP VOUT to CMPOUT in large-signal differential voltage gain parameter condition............................................... 6
•
Deleted package name from Figure 27 ................................................................................................................................ 15
•
Changed Figure 28 caption ................................................................................................................................................. 15
•
Changed text from "RFILT – 3%" to "RFILT + 3%" in 2nd paragraph of Input Filtering section ............................................... 15
•
Changed 22-kΩ R1 resistor to R3 in Figure 31 ..................................................................................................................... 18
Changes from Revision A (September 2012) to Revision B
Page
•
Changed from Mixed Production status to Production Data. ................................................................................................. 1
•
Changed device graphic from pair to single ........................................................................................................................... 1
•
Added AEC-Q100 info to Features bullets ............................................................................................................................. 1
•
Updated Applications bullets .................................................................................................................................................. 1
•
Removed D package from pin configuration image. .............................................................................................................. 4
2
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Product Folder Links: INA200-Q1 INA201-Q1 INA202-Q1
INA200-Q1, INA201-Q1, INA202-Q1
www.ti.com
SBOS558C – APRIL 2011 – REVISED APRIL 2016
5 Device Comparison Table
DEVICE
INA193A-Q1
DESCRIPTION
Same amplifier performance as INA200-Q1 without integrated comparator
INA203-Q1
Dual comparator alternative to the INA200-Q1 single comparator
INA282-Q1
Automotive, 80-V, bidirectional, high-accuracy, low- or high-side, voltage out current shunt monitor
INA300-Q1
Automotive, 36-V, low- or high-side, overcurrent protection comparator
INA301
Overcurrent protection, high-speed, precision, current sense amplifier with integrated comparator
6 Pin Configuration and Functions
DGK Package
8-Pin VSSOP
Top View
VS
1
8
VIN+
OUT
2
7
VIN-
CMPIN
3
6
CMPOUT
GND
4
5
RESET
Pin Functions
PIN
NO.
NAME
I/O
DESCRIPTION
1
Vs
Analog
Power supply
2
OUT
Analog output
Output voltage
3
CMPIN
Analog input
Comparator input
4
GND
Analog
5
RESET
Analog input
Ground
6
CMPOUT
Analog output
7
VIN–
Analog input
Negative input, connect to shunt low side
8
VIN+
Analog input
Positive input, connect to shunt high side
Comparator reset pin, active low
Comparator output
Copyright © 2011–2016, Texas Instruments Incorporated
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3
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SBOS558C – APRIL 2011 – REVISED APRIL 2016
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7 Specifications
7.1 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted)
(1)
MIN
MAX
UNIT
2.7
18
V
Differential (VIN+ – VIN–)
–18
18
V
Common mode (2), VCM = (VIN+ + VIN–) / 2
–16
80
V
GND – 0.3
(VS) + 0.3
V
GND – 0.3
(VS) + 0.3
V
GND – 0.3
18
V
5
mA
125
°C
150
°C
150
°C
Supply voltage, VS
Current-shunt monitor analog
inputs, VIN+, VIN–
Comparator analog input and reset pins, CMPIN and RESET (2)
Analog output, OUT
(2)
Comparator output, CMPOUT (2)
Input current into any pin (2)
Operating temperature, TA
–40
Junction temperature
Storage temperature, Tstg
(1)
(2)
–65
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings
only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended
Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
This voltage may exceed the ratings shown if the current at that pin does not exceed 5 mA.
7.2 ESD Ratings
VALUE
V(ESD)
(1)
Electrostatic discharge
Human-body model (HBM), per AEC Q100-002 (1)
±2000
Charged-device model (CDM), per AEC Q100-011
±1000
UNIT
V
AEC Q100-002 indicates that HBM stressing shall be in accordance with the ANSI/ESDA/JEDEC JS-001 specification.
7.3 Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
MIN
NOM
MAX
VCM
Common-mode input voltage
–16
12
80
UNIT
VS
Operating supply voltage
2.7
12
18
V
TA
Operating free-air temperature
–40
25
125
°C
V
7.4 Thermal Information
INA20x-Q1
THERMAL METRIC
(1)
DGK (VSSOP)
UNIT
8 PINS
RθJA
Junction-to-ambient thermal resistance
162.2
°C/W
RθJC(top)
Junction-to-case (top) thermal resistance
37.7
°C/W
RθJB
Junction-to-board thermal resistance
82.9
°C/W
ψJT
Junction-to-top characterization parameter
1.3
°C/W
ψJB
Junction-to-board characterization parameter
81.4
°C/W
(1)
4
For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report, SPRA953.
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7.5
SBOS558C – APRIL 2011 – REVISED APRIL 2016
Electrical Characteristics: Current-Shunt Monitor
at TA = 25°C, VS = 12 V, VCM = 12 V, VSENSE = VIN+ – VIN–= 100 mV, RL = 10 kΩ to GND, RPULL-UP = 5.1 kΩ connected from
CMPOUT to VS, and CMPIN = GND (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
0.15
(VS – 0.25) /
Gain
UNIT
INPUT
VSENSE
Full-scale sense input voltage
VSENSE = VIN+ – VIN–
VCM
Common-mode input range
TA = –40°C to 125°C
–16
VIN+ = –16 V to 80 V
80
CMR
Common-mode rejection
VIN+ = 12 V to 80 V, TA = –40°C to 125°C.
80
Offset voltage, RTI (1)
V
100
100
dB
123
TA = 25°C
VOS
V
±0.5
dB
±2.5
mV
TA = 25°C to 125°C
±3
mV
TA = –40°C to 25°C
±3.5
mV
dVOS/dT
Offset voltage, RTI, versus
temperature
TA = –40°C to 125°C
PSR
Offset voltage, RTI, versus power
supply
VOUT = 2 V, VIN+ = 18 V, 2.7 V, TA = –40°C to 125°C
2.5
100
μV/V
IB
Input bias current, VIN– Pin
TA = –40°C to 125°C
±9
±16
μA
INA200-Q1
20
V/V
INA201-Q1
50
V/V
INA202-Q1
100
V/V
μV/°C
5
OUTPUT (VSENSE ≥ 20mV)
G
Gain
VSENSE = 20 mV to 100 mV
Gain error
Total output error
±0.2%
±1%
±0.75%
±2.2%
VSENSE = 20 mV to 100 mV, TA = –40°C to 125°C
(2)
Nonlinearity error (3)
RO
Output impedance
CLOAD
Maximum capacitive load
±2%
VSENSE = 120 mV, VS = 16 V
VSENSE = 120 mV, VS = 16 V, TA = –40°C to 125°C
±3.5%
VSENSE = 20 mV to 100 mV
±0.002%
No sustained oscillation
1.5
Ω
10
nF
OUTPUT (VSENSE < 20 mV) (4)
–16 V ≤ VCM < 0 V
Output
0 V ≤ VCM ≤ VS, VS = 5 V
VS < VCM ≤ 80 V
INA20x-Q1
300
mV
INA200-Q1
0.4
V
INA201-Q1
1
V
INA202-Q1
2
INA20x-Q1
V
300
mV
VOLTAGE OUTPUT (5)
Output swing to the positive rail
VIN– = 11 V, VIN+ = 12 V, TA = –40°C to 125°C
(VS) – 0.15
(VS) – 0.25
V
Output swing to GND (6)
VIN– = 0 V, VIN+ = –0.5 V, TA = –40°C to 125°C
(VGND) + 0.004
(VGND) + 0.05
V
FREQUENCY RESPONSE
BW
Bandwidth
Phase margin
SR
CLOAD = 5 pF
INA200-Q1
500
kHz
INA201-Q1
300
kHz
INA202-Q1
200
kHz
40
Degrees
1
V/μs
2
μs
40
nV/√Hz
CLOAD < 10 nF
Slew rate
Settling time (1%)
VSENSE = 10 mVPP to 100 mVPP, CLOAD = 5 pF
NOISE, RTI
Voltage noise density
(1)
(2)
(3)
(4)
(5)
(6)
Offset is extrapolated from measurements of the output at 20 mV and 100 mV VSENSE.
Total output error includes effects of gain error and VOS.
Linearity is best fit to a straight line.
For details on this region of operation, see the Accuracy Variations section in the Device Functional Modes.
See Figure 7.
Specified by design.
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SBOS558C – APRIL 2011 – REVISED APRIL 2016
7.6
www.ti.com
Electrical Characteristics: Comparator
at TA = 25°C, VS = 12 V, VCM = 12 V, VSENSE = 100 mV, RL = 10 kΩ to GND, and RPULL-UP = 5.1 kΩ connected from CMPOUT to
VS (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
TA = 25°C
590
608
620
mV
TA = –40°C to 125°C
586
625
mV
OFFSET VOLTAGE
Threshold
Hysteresis (1)
TA = –40°C to 85°C
–8
mV
INPUT BIAS CURRENT (2)
0.005
CMPIN pin
TA = –40°C to 125°C
10
nA
15
nA
INPUT VOLTAGE RANGE
CMPIN pin
0 to VS – 1.5
V
OUTPUT (OPEN-DRAIN)
Large-signal differential voltage gain
CMPOUT = 1 V to 4 V,
RL ≥ 15 kΩ connected to 5 V
ILKG
High-level leakage current (3) (4)
VID = 0.4 V, VOH = VS
0.0001
1
μA
VOL
Low-level output voltage (3)
VID = –0.6 V, IOL = 2.35 mA
220
300
mV
RL to 5 V, CL = 15 pF, 100-mV input step with
5-mV overdrive
1.3
200
V/mV
RESPONSE TIME
Response time (5)
μs
RESET
RESET threshold (6)
1.1
Logic input impedance
Minimum RESET pulse duration
MΩ
1.5
μs
3
μs
RESET propagation delay
(1)
(2)
(3)
(4)
(5)
(6)
7.7
V
2
Hysteresis refers to the threshold (the threshold specification applies to a rising edge of a noninverting input) of a falling edge on the
noninverting input of the comparator; see Figure 25.
Specified by design.
VID refers to the differential voltage at the comparator inputs.
Pulling the open-drain output to the range of 2.7 V to 18 V is permissible, regardless of VS.
The comparator response time specified is the interval between the input step function and the instant when the output crosses 1.4 V.
The RESET input has an internal 2-MΩ (typical) pulldown. Leaving RESET open results in a low state, with transparent comparator
operation.
Electrical Characteristics: General
at TA = 25°C, VS = 12 V, VCM = 12 V, VSENSE = 100 mV, RL = 10 kΩ to GND, RPULL-UP = 5.1 kΩ connected from CMPOUT to VS,
and CMPIN = 1 V (unless otherwise noted)
GENERAL PARAMETERS
CONDITIONS
MIN
TYP
MAX
UNIT
1350
1800
μA
1850
μA
POWER SUPPLY
IQ
VOUT = 2 V
Quiescent current
VSENSE = 0 mV, TA = –40°C to 125°C
Comparator power-on reset threshold (1)
(1)
6
1.5
V
The INA20x-Q1 devices power up with the comparator in a defined reset state as long as the RESET pin is open or grounded. The
comparator is in reset as long as the power supply is below the voltage shown here. The comparator assumes a state based on the
comparator input above this supply voltage. If RESET is high at power up, the comparator output comes up high and requires a reset to
assume a low state, if appropriate.
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SBOS558C – APRIL 2011 – REVISED APRIL 2016
7.8 Typical Characteristics
At TA = 25°C, VS = 12 V, VIN+ = 12 V, and VSENSE = 100 mV (unless otherwise noted)
45
40
G = 50
35
Gain (dB)
30
G = 100
40
G = 50
35
Gain (dB)
45
CLOAD = 1000pF
G = 100
G = 20
25
20
30
20
15
15
10
10
5
G = 20
25
5
10k
100k
10k
1M
100k
Frequency (Hz)
Figure 1. Gain vs Frequency
Figure 2. Gain vs Frequency
20
140
18
130
Common-Mode and
Power-Supply Rejection (dB)
100V/V
16
VOUT (V)
14
50V/V
12
10
8
20V/V
6
4
120
CMR
110
100
90
PSR
80
70
60
50
2
40
0
20
100
200
300
400
500
600
700
800
900
10
100
1k
VDIFFERENTIAL (mV)
10k
100k
Frequency (Hz)
Figure 3. Gain Plot
Figure 4. Common-Mode and Power-Supply Rejection vs
Frequency
4.0
0.1
3.5
0.09
0.08
3.0
Output Error (% )
Output Error
(% error of the ideal output value)
1M
Frequency (Hz)
2.5
2.0
1.5
1.0
0.07
0.06
0.05
0.04
0.03
0.02
0.5
0.01
0
0
50
100 150
200
250 300
350 400 450 500
VSENSE (mV)
Figure 5. Output Error vs VSENSE
Copyright © 2011–2016, Texas Instruments Incorporated
0
0
-16 -12 -8 -4
4
8
12 16 20
...
76 80
Common-Mode Voltage (V)
Figure 6. Output Error vs Common-Mode Voltage
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Typical Characteristics (continued)
At TA = 25°C, VS = 12 V, VIN+ = 12 V, and VSENSE = 100 mV (unless otherwise noted)
3.5
12
11
VS = 12V
10
9
2.5
+25°C
8
-40°C
+125°C
7
6
VS = 3V
5
Sourcing Current
+25°C
4
-40°C
Output stage is designed
to source current. Current
sinking capability is
approximately 400mA.
3
2
1
+125°C
0
0
IQ (mA)
Output Voltage (V)
3.0
Sourcing Current
2.0
1.5
1.0
0.5
0
5
10
20
15
25
30
0
1
2
3
4
5
7
6
9
10
Output Voltage (V)
Figure 7. Positive Output Voltage Swing vs Output Current
Figure 8. Quiescent Current vs Output Voltage
34
VSENSE = 100mV
1.75
Output Short-Circuit Current (mA)
2.00
VS = 2.7V
VS = 12V
IQ (mA)
1.50
1.25
VS = 12V
1.00
VS = 2.7V
VSENSE = 0mV
0.75
0.50
-16 -12 -8 -4
-40°C
30
+25°C
26
+125°C
22
18
14
10
6
0
4
8
12 16 20 24 28 32 36
2.5 3.5
4.5
5.5 6.5
VCM (V)
7.5
8.5
9.5 10.5 11.5 17
18
Supply Voltage (V)
Figure 9. Quiescent Current vs Common-Mode Voltage
Figure 10. Output Short-Circuit Current vs Supply Voltage
G = 20
Output Voltage (50mV/div)
Output Voltage (500mV/div)
G = 20
VSENSE = 20mV to 30mV
VSENSE = 20mV to 110mV
Time (2ms/div)
Figure 11. Step Response
8
8
Output Current (mA)
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Time (2ms/div)
Figure 12. Step Response
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SBOS558C – APRIL 2011 – REVISED APRIL 2016
Typical Characteristics (continued)
At TA = 25°C, VS = 12 V, VIN+ = 12 V, and VSENSE = 100 mV (unless otherwise noted)
G = 50
Output Voltage (50mV/div)
Output Voltage (100mV/div)
G = 20
VSENSE = 90mV to 100mV
VSENSE = 20mV to 30mV
Time (2ms/div)
Time (5ms/div)
Figure 13. Step Response
Figure 14. Step Response
G = 50
Output Voltage (1V/div)
Output Voltage (100mV/div)
G = 50
VSENSE = 90mV to 100mV
VSENSE = 20mV to 110mV
Time (5ms/div)
Time (5ms/div)
Figure 15. Step Response
Figure 16. Step Response
600
G = 100
Output Voltage (2V/div)
500
VOL (mV)
400
300
200
100
VSENSE = 20mV to 110mV
0
Time (10ms/div)
0
1
2
3
4
5
6
ISINK (mA)
Figure 17. Step Response
Figure 18. Comparator VOL vs ISINK
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Typical Characteristics (continued)
At TA = 25°C, VS = 12 V, VIN+ = 12 V, and VSENSE = 100 mV (unless otherwise noted)
600
602
Comparator Trip Point (mV)
599
Reset Voltage (mV)
598
597
596
595
594
593
592
601
600
599
598
597
591
596
590
2
4
6
8
10
12
14
16
18
-50
0
-25
Supply Voltage (V)
Figure 19. Comparator Trip Point vs Supply Voltage
50
75
100
125
Figure 20. Comparator Trip Point vs Temperature
200
1.2
175
1.0
Reset Voltage (V)
Propagation Delay (ns)
25
Temperature (°C)
150
125
100
75
0.8
0.6
0.4
0.2
50
0
0
20
40
60
80
100 120 140
160 180
200
2
4
6
8
10
12
14
16
18
Overdrive Voltage (mV)
Supply Voltage (V)
Figure 21. Comparator Propagation Delay vs Overdrive
Voltage
Figure 22. Comparator Reset Voltage vs Supply Voltage
300
Propagation Delay (ns)
275
Input
200mV/div
250
225
200
Output
2V/div
175
150
125
-50
VOD = 5mV
-25
0
25
50
75
100
2ms/div
125
Temperature (°C)
Figure 24. Comparator Propagation Delay
Figure 23. Comparator Propagation Delay vs Temperature
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8 Parameter Measurement Information
8.1 Hysteresis
Figure 25 shows the typical comparator hysteresis.
VTHRESHOLD
0.592V 0.6V
Input Voltage
Hysteresis = VTHRESHOLD - 8mV
Figure 25. Typical Comparator Hysteresis
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9 Detailed Description
9.1 Overview
The INA20x-Q1 current-shunt monitors operate over a wide common-mode voltage range (–16 V to +80 V).
These devices integrate an open-drain comparator with an internal 0.6-V reference at the negative input. Use
external dividers from the output of the current shunt monitor to the positive input of the comparator to set the
positive input for overcurrent detection. The comparator includes a latching capability, but can also be made
transparent by grounding (or floating) the RESET pin.
9.2 Functional Block Diagram
VS
VIN+
OUT
G
VIN
0.6-V
Reference
CMPIN
Comparator
GND
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CMPOUT
RESET
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9.3 Feature Description
9.3.1 Comparator
The INA200-Q1, INA201-Q1, and INA202-Q1 devices incorporate an open-drain comparator. This comparator
typically has 2 mV of offset and a 1.3 μs (typical) response time. The RESET pin latches and resets the output of
the comparator; see Figure 26.
0.6V
VIN
0V
CMPOUT
RESET
Figure 26. Comparator Latching Capability
9.3.2 Output Voltage Range
The output of the INA20x-Q1 is accurate within the output voltage swing range set by the power supply pin, VS.
Best illustration of this performance occurs when using the INA202-Q1 (gain-of-100 version), where a 100-mV
full-scale input from the shunt resistor requires an output voltage swing of 10 V, and a power-supply voltage
sufficient to achieve 10 V on the output.
9.4 Device Functional Modes
The INA20x-Q1 have a single functional mode and are operational when the power-supply voltage is greater
than 2.7 V. The common-mode voltage must be between –16 V and +80 V. The maximum power supply voltage
for the INA20x-Q1 is 18 V.
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10 Application Information
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
10.1 Application Information
The INA20x-Q1 series is designed to enable easy configuration for detecting overcurrent conditions and current
monitoring in an application. This device is individually targeted towards overcurrent detection of a single
threshold. However, this device can also be paired with additional devices and circuitry to create more complex
monitoring functional blocks.
10.1.1 Basic Connections
Figure 27 shows the basic connections of the INA200-Q1, INA201-Q1, and INA202-Q1. Connect the input pins,
VIN+ and VIN–, as close as possible to the shunt resistor to minimize any resistance in series with the shunt
resistance.
Stability requires the use of power-supply bypass capacitors. Applications with noisy or high-impedance power
supplies may require additional decoupling capacitors to reject power-supply noise. Connect bypass capacitors
close to the device pins.
RSHUNT
3 mΩ
Load Supply
-18 V to +80 V
Load
5 V Supply
INA200-Q1
(G = 20)
1
VS
2 OUT
CBYPASS
0.01 µF
G
VIN+
8
VIN-
7
CMPOUT
6
RESET
5
RPULL-UP
4.7 kΩ
0.6 V
Reference
R1
3 CMPIN
Comparator
R2
4
GND
Transparent/Reset
Latch
Figure 27. INA200-Q1 Basic Connections
10.1.2 Selecting RS
The value chosen for the shunt resistor, RS, depends on the application and is a compromise between smallsignal accuracy and maximum permissible voltage loss in the measurement line. High values of RS provide better
accuracy at lower currents by minimizing the effects of offset, whereas low values of RS minimize voltage loss in
the supply line. Most applications attain best performance with an RS value that provides a full-scale shunt
voltage range of 50 mV to 100 mV. Maximum input voltage for accurate measurements is 500 mV, but output
voltage is limited by supply.
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Application Information (continued)
10.1.3 Input Filtering
An obvious and straightforward location for filtering is at the output of the INA20x-Q1 series; however, this
location negates the advantage of the low output impedance of the internal buffer. The only other option for
filtering is at the input pins of the INA20x-Q1, but the internal 5-kΩ + 30% input impedance complicates input
filtering, as illustrated in Figure 28. Use the lowest possible resistor values to minimize both the initial shift in gain
and effects of tolerance. Equation 1 gives the effect on initial gain:
Gain Error % = 100 - 100 ´
5kW
5kW + RFILT
(1)
RSHUNT
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