component
INA2321EA
Public Made by Adomby adom
Texas Instruments Instrumentation Amplifiers, TSSOP-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownINA2321EA
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ina2321ea.step/ina2321ea.glbare 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, primaryclaude-haiku-5-5(text), consensusclaude-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).