Sense Amplifier. INA186-Q1 Datasheet

INA186-Q1 Amplifier. Datasheet pdf. Equivalent

INA186-Q1 Datasheet
Recommendation INA186-Q1 Datasheet
Part INA186-Q1
Description 40-V Current Sense Amplifier
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INA186-Q1
SBOS386 – MAY 2019
INA186-Q1 Automotive, 40-V Current Sense Amplifier for Cost-Sensitive Systems
1 Features
1 AEC-Q100 qualified for automotive applications:
– Temperature grade 1: –40°C to +125°C, TA
• Wide common-mode voltage range, VCM:
–0.2 V to +40 V with survivability up to 42 V
(Recommended for automotive 12-V battery
applications)
• Low input bias currents, IIB: 500 pA (typ)
• Low power:
– Low supply voltage, VS: 1.7 V to 5.5 V
– Low quiescent current, IQ: 48 µA (typ)
• Accuracy:
– Gain error, EG: ±1% (max)
– Gain drift: 10 ppm/°C (max)
– Offset voltage, VOS: ±50 μV (max)
– Offset drift: 0.5 μV/°C (max)
• Bidirectional current sensing capability
• Gain options:
– INA186A1-Q1: 25 V/V
– INA186A2-Q1: 50 V/V
– INA186A3-Q1: 100 V/V
– INA186A4-Q1: 200 V/V
– INA186A5-Q1: 500 V/V
2 Applications
• Body control module (BCM)
• Telematics control unit
• Emergency call (eCall)
• 12-V battery management system (BMS)
• Automotive head unit
3 Description
The INA186-Q1 is an automotive, bidirectional, low-
power, voltage-output, current-sense amplifier (also
called a current-shunt monitor). This device is
commonly used for monitoring systems directly
connected to an automotive 12-V battery. The
INA186-Q1 can sense drops across shunts at
common-mode voltages from –0.2 V to +40 V,
independent of the supply voltage. In addition, the
input pins have an absolute maximum voltage of 42V.
The low input bias current of the INA186-Q1 permits
the use of larger current-sense resistors, thus
providing accurate current measurements in the
microamp range. The low offset voltage of the zero-
drift architecture extends the dynamic range of the
current measurement. This feature allows for smaller
sense resistors with lower power loss, while still
providing accurate current measurements.
The INA186-Q1 operates from a single 1.7-V to 5.5-V
power supply, and draws a maximum of 90 μA of
supply current. Five fixed gain options are available:
25 V/V, 50 V/V, 100 V/V, 200 V/V, or 500 V/V. The
device is specified over the operating temperature
range of –40°C to +125°C, and offered in an SC70
package.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
INA186-Q1
SC70 (6)
2.00 mm × 1.25 mm
(1) For all available packages, see the package option addendum
at the end of the datasheet.
Bus Voltage
±0.2 V to +40 V
RSENSE
0.5 nA
(typ)
Typical Application
Supply Voltage
1.7 V to 5.5 V
LOAD
0.5 nA
(typ)
IN±
CBYPASS
0.1 F
VS
INA186-Q1 OUT
ADC
Microcontroller
IN+
GND
REF
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.



Texas Instruments INA186-Q1
INA186-Q1
SBOS386 – MAY 2019
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics........................................... 5
6.6 Typical Characteristics .............................................. 6
7 Detailed Description ............................................ 10
7.1 Overview ................................................................. 10
7.2 Functional Block Diagram ....................................... 10
7.3 Feature Description................................................. 11
7.4 Device Functional Modes........................................ 13
8 Application and Implementation ........................ 16
8.1 Application Information............................................ 16
8.2 Typical Applications ................................................ 21
9 Power Supply Recommendations...................... 23
10 Layout................................................................... 23
10.1 Layout Guidelines ................................................. 23
10.2 Layout Example .................................................... 23
11 Device and Documentation Support ................. 24
11.1 Documentation Support ........................................ 24
11.2 Receiving Notification of Documentation Updates 24
11.3 Community Resources.......................................... 24
11.4 Trademarks ........................................................... 24
11.5 Electrostatic Discharge Caution ............................ 24
11.6 Glossary ................................................................ 24
12 Mechanical, Packaging, and Orderable
Information ........................................................... 24
4 Revision History
DATE
May 2019
REVISION
*
NOTES
Initial release.
2 Submit Documentation Feedback
Product Folder Links: INA186-Q1
Copyright © 2019, Texas Instruments Incorporated



Texas Instruments INA186-Q1
www.ti.com
5 Pin Configuration and Functions
DCK Package
6-Pin SC70
Top View
INA186-Q1
SBOS386 – MAY 2019
NAME
GND
IN–
PIN
NO.
2
5
IN+ 4
OUT
REF
VS
6
1
3
REF
GND
VS
1
2
3
6 OUT
5 IN±
4 IN+
Not to scale
Pin Functions
TYPE
DESCRIPTION
Analog
Analog input
Analog input
Analog output
Analog input
Analog
Ground
Current-sense amplifier negative input. For high-side applications, connect to load side of
sense resistor. For low-side applications, connect to ground side of sense resistor.
Current-sense amplifier positive input. For high-side applications, connect to bus voltage side
of sense resistor. For low-side applications, connect to load side of sense resistor.
OUT pin. This pin provides an analog voltage output that is the gained up voltage difference
from the IN+ to the IN– pins, and is offset by the voltage applied to the REF pin.
Reference input. Enables bidirectional current sensing with an externally applied voltage.
Power supply, 1.7 V to 5.5 V
Copyright © 2019, Texas Instruments Incorporated
Product Folder Links: INA186-Q1
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