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INA253

Public Made by Adom

by adom

TI current-sense amplifier with integrated precision shunt, TSSOP-20. -4 to 80 V, 15 A, bidirectional. Datasheet-verified.

componentamplifiercurrent-senseintegrated-shunttssop-20texas-instruments
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Contents

README

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INA253

Texas Instruments · Current-sense amplifier · TSSOP-20

Current-sense amplifier that integrates its own precision 2 mOhm shunt on-chip, so a designer drops in one part instead of matching an external resistor to the amplifier and fighting layout parasitics. The inputs handle a common-mode range from -4 to 80 V for high-side use, it carries up to 15 A continuous, and a REF pin sets the zero-current output for bidirectional current. The matched shunt gives a tight, temperature-stable gain error. A complete, board-friendly current measurement in one package.

Pinout

Pin Name Type Function
1 IS- passive Load-side terminal of the integrated 2-mΩ shunt resistor. Connect to load. Pins 1, 2, and 3 are internally tied together as one side of the shunt.
2 IS- passive Load-side terminal of the integrated 2-mΩ shunt resistor. Connect to load.
3 IS- passive Load-side terminal of the integrated 2-mΩ shunt resistor. Connect to load.
4 SH- output Kelvin sense output from the load-side of the internal shunt resistor. Connect to IN- directly if no filtering is needed.
5 IN- input Amplifier differential input from the load side of the shunt resistor. Common-mode range -4 V to +80 V.
6 GND power_in Device ground reference.
7 DNC1 unconnected Do Not Connect. Leave floating; do not tie to any potential.
8 NC unconnected No connect.
9 VS power_in Power supply input, 2.7 V to 5.5 V. Draws up to 2.4 mA quiescent current.
10 REF2 input Reference voltage 2 input, 0 V to VS. Sets the output reference along with REF1 for bidirectional current sensing.
11 REF1 input Reference voltage 1 input, 0 V to VS. Sets the output reference along with REF2 for bidirectional current sensing.
12 NC unconnected No connect.
13 OUT output Analog output voltage proportional to sensed current times the gain (100/200/400 mV/A depending on A1/A2/A3 variant).
14 DNC2 unconnected Do Not Connect. Leave floating; do not tie to any potential.
15 NC passive Reserved; connect this pin to GND.
16 IN+ input Amplifier differential input from the supply side of the shunt resistor. Common-mode range -4 V to +80 V.
17 SH+ output Kelvin sense output from the supply-side of the internal shunt resistor. Connect to IN+ directly if no filtering is needed.
18 IS+ passive Supply-side terminal of the integrated 2-mΩ shunt resistor. Connect to supply. Pins 18, 19, and 20 are internally tied together as one side of the shunt.
19 IS+ passive Supply-side terminal of the integrated 2-mΩ shunt resistor. Connect to supply.
20 IS+ passive Supply-side terminal of the integrated 2-mΩ shunt resistor. Connect to supply.

Key specifications

Parameter Value
Type Current-sense amplifier with integrated shunt
Shunt 2 mOhm integrated
Common-mode range -4 V to 80 V
Continuous current 15 A
Direction Bidirectional (via REF)
Gain Fixed (part option)
Supply 2.7-5.5 V
Package TSSOP-20

Ordering variants

Same part, different packaging or reel option.

  • INA253A2PW (gain 2 V/A)
  • INA253A3PW (gain 4 V/A)
  • INA253A4PW (gain 8 V/A)

CAD (KiCad official)

  • Symbol: Amplifier_Current:INA253 (KiCad official)
  • Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
  • 3D model: TSSOP-20 (KiCad packages3D, STEP)
  • 3D model files: ina253-etched.step / ina253-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ina253.step / ina253.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (36 pp, sha256 f316d2de54cc0924, retrieved 2026-08-17, tier: manufacturer)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF