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INA321E
Public Made by Adomby adom
Texas Instruments Instrumentation Amplifiers, VSSOP-8. 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
markdownINA321E
Texas Instruments · Instrumentation Amplifiers · VSSOP-8
INA321E from Texas Instruments, in a VSSOP-8. 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 | RG | passive | Gain-setting connection; the external resistors on RG, REF and VOUT set gain as G = 5 + 5(R2/R1), and resistor mismatch or tempco adds directly to gain error. |
| 2 | VIN− | power_in | Inverting differential input; it needs a DC bias-current return path, and inputs that swing more than 0.5V beyond the supply rails should be limited to 10mA or less. |
| 3 | VIN+ | power_in | Non-inverting differential input; it needs a DC bias-current return path, and inputs that swing more than 0.5V beyond the supply rails should be limited to 10mA or less. |
| 4 | V− | power_in | Negative power supply; the device is specified for V+ to V− from +2.7V to +5.5V, with an absolute maximum of 7.5V. |
| 5 | REF | input | Reference terminal that sets the zero-output level and must be low impedance (as little as 160Ω in series degrades CMRR to 80dB), and it must be at least 1.2V below the positive supply rail. |
| 6 | VOUT | output | Output referred to the REF terminal, with rail-to-rail swing for gains of 10 or greater, and optimized for loads of 10kΩ or greater. |
| 7 | V+ | power_in | Positive power supply; the device is specified from +2.7V to +5.5V (operating voltage range +2.5V to +5.5V), with an absolute maximum of 7.5V between V+ and V−. |
| 8 | Shutdown | input | Shutdown control, nominally tied to V+; pulling it below 0.8V on a 5V supply puts the amplifier into sleep mode with less than 1µA quiescent current. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VSSOP-8 |
| Category | Amplifiers/Comparators |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
INA321E - Footprint:
Package_SO:VSSOP-8_2.3x2mm_P0.5mm - 3D model: VSSOP-8 (KiCad packages3D, STEP)
- 3D model files:
ina321e-etched.step/ina321e-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ina321e.step/ina321e.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).