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INA2321EA

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Texas Instruments Instrumentation Amplifiers, TSSOP-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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INA2321EA

Texas Instruments · Instrumentation Amplifiers · TSSOP-14

INA2321EA from Texas Instruments, in a TSSOP-14. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 Shutdown A input Shutdown control for amplifier A, nominally connected to V+; pulling it below 0.8V on a 5V supply puts the amplifier into sleep mode (under 1µA quiescent current) within nanoseconds.
2 VOUTA output Output of amplifier A, referred to the REFA terminal, swinging rail-to-rail for gains of 10 or greater and optimized for load impedances of 10kΩ or greater.
3 REFA input Reference terminal that sets the zero-output level for amplifier A; it requires a low-impedance connection, must be at least 1.2V below the positive supply rail, and 160Ω in series degrades CMRR to 80dB.
4 V+ power_in Positive power supply, specified from +2.7V to +5.5V (operating range +2.5V to +5.5V), and should be decoupled with 0.1µF capacitors as close to the device as possible.
5 REFB input Reference terminal that sets the zero-output level for amplifier B; it requires a low-impedance connection, must be at least 1.2V below the positive supply rail, and 160Ω in series degrades CMRR to 80dB.
6 VOUTB output Output of amplifier B, referred to the REFB terminal, swinging rail-to-rail for gains of 10 or greater and optimized for load impedances of 10kΩ or greater.
7 Shutdown B input Shutdown control for amplifier B, nominally connected to V+; pulling it below 0.8V on a 5V supply puts the amplifier into sleep mode (under 1µA quiescent current) within nanoseconds.
8 RGB passive Gain-setting resistor connection for amplifier B, where gain G = 5 + 5(R2/R1) and gain above 5 V/V is set by external resistors across this pin.
9 VIN−B power_in Inverting input of amplifier B; input ESD diodes conduct if the input exceeds the supply rails by more than 500mV, so input signals beyond that must be limited to 10mA, and a bias-current return path is required.
10 VIN+B power_in Non-inverting input of amplifier B; input ESD diodes conduct if the input exceeds the supply rails by more than 500mV, so input signals beyond that must be limited to 10mA, and a bias-current return path is required.
11 V− power_in Negative power supply terminal, supporting single-supply or bipolar-supply operation of the INA321 family.
12 VIN+A power_in Non-inverting input of amplifier A; input ESD diodes conduct if the input exceeds the supply rails by more than 500mV, so input signals beyond that must be limited to 10mA, and a bias-current return path is required.
13 VIN−A power_in Inverting input of amplifier A; input ESD diodes conduct if the input exceeds the supply rails by more than 500mV, so input signals beyond that must be limited to 10mA, and a bias-current return path is required.
14 RGA passive Gain-setting resistor connection for amplifier A, where gain G = 5 + 5(R2/R1) and gain above 5 V/V is set by external resistors across this pin.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package TSSOP-14
Category Amplifiers/Comparators
Pins 14

CAD (KiCad official)

  • Symbol: INA2321EA
  • Footprint: Package_SO:TSSOP-14_4.4x5mm_P0.65mm
  • 3D model: TSSOP-14 (KiCad packages3D, STEP)
  • 3D model files: ina2321ea-etched.step / ina2321ea-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ina2321ea.step / ina2321ea.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (25 pp, sha256 2363d452254a2876, retrieved 2026-10-11, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF