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INA821IDR

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by Ray

Texas Instruments Instrumentation Amplifiers, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

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Datasheet

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Contents

README

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INA821IDR

Texas Instruments · Instrumentation Amplifiers · SOIC-8

INA821IDR from Texas Instruments, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 -IN input Negative (inverting) analog input to the instrumentation amplifier. Protected up to ±40 V. Signal input voltage range −40 V to +40 V (absolute max).
2 RG passive Gain-setting pin. Place an external gain resistor RG between pin 2 and pin 3 to set gain per G = 1 + 49.4 kΩ / RG. Leave open for unity gain (G = 1).
3 RG passive Gain-setting pin. Place an external gain resistor RG between pin 2 and pin 3 to set gain per G = 1 + 49.4 kΩ / RG. Leave open for unity gain (G = 1).
4 +IN input Positive (noninverting) analog input to the instrumentation amplifier. Protected up to ±40 V. Signal input voltage range −40 V to +40 V (absolute max).
5 -VS power_in Negative supply rail. Connect to GND for single-supply operation or to the negative rail for dual-supply operation. Total supply range 4.5 V to 36 V (single) or ±2.25 V to ±18 V (dual).
6 REF input Reference input that sets the output-voltage zero level (VOUT = G × (VIN+ − VIN−) + VREF). Must be driven from a low-impedance source to preserve common-mode rejection.
7 OUT output Amplifier output. Output swings within (−VS − 0.5 V) to (+VS + 0.5 V) absolute limits and is short-circuit protected (continuous short to VS/2).
8 +VS power_in Positive supply rail. Total supply range 4.5 V to 36 V (single) or ±2.25 V to ±18 V (dual). Quiescent supply current 650 µA (max).

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-8
Category Amplifiers/Comparators
Pins 8

Ordering variants

Same part, different packaging or reel option.

  • INA821IDR
  • INA821IDRIDGKR
  • INA821IDRIDGK
  • INA821IDRGR
  • INA821IDRG

CAD (KiCad official)

  • Symbol: INA821IDR
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Texas Instruments datasheet (50 pp, sha256 f0b5748985ffaabb, 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