Product details


Common mode voltage (Max) (V) 36 Common mode voltage (Min) (V) 2.7 Input offset (+/-) (Max) (uV) 2000 Input offset drift (+/-) (Typ) (uV/C) 1 Gain (V/V) Adjustable Gain error (%) 3.2 Gain error drift (+/-) (Max) (ppm/°C) 150 CMRR (Min) (dB) 100 Bandwidth (kHz) 800 Supply voltage (Max) (V) 36 Supply voltage (Min) (V) 2.7 Iq (Max) (mA) 0.06 Number of channels (#) 1 Comparators (#) 0 Features Current Output Rating Automotive Operating temperature range (C) -40 to 125 open-in-new Find other Current sense amplifiers analog output

Package | Pins | Size

TSSOP (PW) 8 19 mm² 3 x 6.4 open-in-new Find other Current sense amplifiers analog output


  • 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 2
    • Device CDM ESD Classification Level C6
  • Complete Unipolar High-Side Current-Measurement Circuit
  • Wide Supply and Common-Mode Ranges:
    • INA138-Q1: 2.7 V to 36 V
    • INA168-Q1: 2.7 V to 60 V
  • Independent Supply and Input Common-Mode Voltages
  • Single Resistor Gain Set
  • Low Quiescent Current (25 µA Typical)
  • Wide Temperature Range: –40°C to +125°C
  • Packages: TSSOP-8, SOT-23-5 (INA168-Q1)

All trademarks are the property of their respective owners.

open-in-new Find other Current sense amplifiers analog output


The INA138-Q1 and INA168-Q1 (INA1x8-Q1) devices are high-side, unidirectional, current sense amplifiers. Wide input common-mode voltage range, low quiescent current, and TSSOP and SOT-23 packaging enable use in a variety of applications.

Input common-mode and power-supply voltages are independent, and range from 2.7 V to 36 V for the INA138-Q1, and 2.7 V to 60 V for the INA168-Q1. Quiescent current is only 25 µA, which permits connecting the power supply to either side of the current-measurement shunt with minimal error.

The device converts a differential input voltage to a current output. This current is converted back to a voltage with an external load resistor that sets any gain from 1 to over 100. Although designed for current shunt measurement, the circuit invites creative applications in measurement and level shifting.

Both devices are available in a TSSOP-8 package. The INA168-Q1 is also available in a SOT-23-5 package. Both devices are specified for the –40°C to +125°C temperature range.


open-in-new Find other Current sense amplifiers analog output
Similar products you might be interested in
open-in-new Compare products
Same functionality and pinout but is not an equivalent to the compared device:
INA139-Q1 ACTIVE AEC-Q100, 2.7 to 36V, 440kHz Variable gain current sense amplifier The INA139-Q1 is functionally equivalent with higher bandwidth
INA168-Q1 ACTIVE AEC-Q100, 2.7 to 60V, 800kHz Variable gain current sense amplifier The INA168-Q1 is functionally equivalent supporting up to 60 V

Technical documentation

star = Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 7
Type Title Date
* Data sheet INA1x8-Q1 Automotive-Grade, High-Side, Current-Output, Current-Shunt Monitor datasheet (Rev. J) Aug. 03, 2018
Technical article How current-sense amplifiers monitor satellite health Feb. 08, 2021
Technical article A key to accurate system thermal management: monitoring both current flow and temperature Oct. 04, 2018
Application note High-voltage, high-side floating current sensing circuit using current output, c Jun. 28, 2018
Technical article System trade-offs for high- and low-side current measurements Jun. 01, 2017
Technical article Why should you care about overcurrent protection in your system? Jun. 16, 2016
Application note Extending Voltage Range of Current Shunt Monitor Feb. 15, 2006

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Design tools & simulation

SBFC024.TSM (3 KB) - TINA-TI Spice Model
SBOC152A.TSC (45 KB) - TINA-TI Reference Design
SBOM140A.ZIP (25 KB) - PSpice Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
document-generic User guide
SGLC001A.ZIP (28 KB)

Reference designs

Voltage and Current Measurement Reference Design for Automotive On-Board Charger System
TIDA-00456 This TI Design uses Texas Instruments current shunt amplifiers, operational amplifiers (Op-Amp), ADCs, and digital isolators to provide current and voltage measurements for an on-board charger system in a hybrid-electric/electric vehicle. The measured current and voltage can be used as control (...)
document-generic Schematic document-generic User guide
High Voltage 12 V – 400 V DC Current Sense Reference Design
TIDA-00332 This Verified Design shows a circuit to measure currents with a common mode of up to 400V using an INA138. This is achieved by creating a simple floating power supply and biasing the INA138 directly from the high voltage source. The 400V in this design is an example. With different components even (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
TSSOP (PW) 8 View options

Ordering & quality

Information included:
  • RoHS
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​