Product details


Common mode voltage (Max) (V) 36 Common mode voltage (Min) (V) 2.7 Input offset (+/-) (Max) (uV) 1000 Input offset drift (+/-) (Typ) (uV/C) 1 Gain (V/V) Adjustable Gain error (%) 2 Gain error drift (+/-) (Max) (ppm/°C) 100 CMRR (Min) (dB) 100 Bandwidth (kHz) 440 Supply voltage (Max) (V) 40 Supply voltage (Min) (V) 2.7 Iq (Max) (mA) 0.125 Number of channels (#) 1 Comparators (#) 0 Features Current Output Rating Catalog Operating temperature range (C) -40 to 125 open-in-new Find other Current sense amplifiers analog output

Package | Pins | Size

SOT-23 (DBV) 5 5 mm² 2.9 x 1.6 open-in-new Find other Current sense amplifiers analog output


  • Complete Unipolar High-Side Current Measurement Circuit
  • Wide Supply and Common-Mode Range
  • INA139: 2.7 V to 40 V
  • INA169: 2.7 V to 60 V
  • Independent Supply and Input Common-Mode Voltages
  • Single Resistor Gain Set
  • Low Quiescent Current: 60 µA (Typical)
  • 5-Pin, SOT-23 Packages

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The INA139 and INA169 are high-side, unipolar, current shunt monitors. Wide input common-mode voltage range, high-speed, low quiescent current, and tiny SOT-23 packaging enable use in a variety of applications.

Input common-mode and power-supply voltages are independent and can range from 2.7 V to 40 V for the INA139 and 2.7 V to 60 V for the INA169. Quiescent current is only 60 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 the INA139 and INA169 are available in 5-pin SOT-23 packages. The INA139 device is specified for the –40°C to +125°C temperature range, and the INA169 is specified from –40°C to +85°C.

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Technical documentation

Design & development

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

Design tools & simulation

SBOM946.TSC (79 KB) - TINA-TI Reference Design
SBOM947.ZIP (8 KB) - TINA-TI Spice Model
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

Reference designs

10V-13V Input Constant Output Current Capacitor-Charger Boost Converter (28V@0.13A) Reference Design
PMP11228 — This 28V boost converter charges a capacitor "bank" at a constant 0.13A to reduce the power drawn from the 10V - 13V input. Two control loop are implemented; one to regulate output current and a second to regulate output voltage. This design can support high pulse load currents at a repetitive rate (...)
document-generic Schematic document-generic User guide

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SOT-23 (DBV) 5 View options

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