# INA129P

**Texas Instruments** · Instrumentation Amplifiers · PDIP-8

INA129P from Texas Instruments, in a PDIP-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 pin; connect external resistor between pins 1 and 8 to program gain according to formula G = 1 + 49.4kΩ/RG. |
| 2 | VIN- | power_in | Inverting input pin accepting common-mode voltage from (V-) + 2V to (V+) - 2V with maximum safe input voltage of ±40V. |
| 3 | VIN+ | power_in | Non-inverting input pin accepting common-mode voltage from (V-) + 2V to (V+) - 2V with maximum safe input voltage of ±40V. |
| 4 | V- | power_in | Negative power supply pin; supply voltage range ±2.25V to ±18V dual supply or 4.5V to 36V single supply. |
| 5 | REF | input | Reference input pin that must be driven by low impedance source; output voltage is referenced to this pin and is typically connected to ground. |
| 6 | VO | output | Output pin providing amplified differential voltage with output swing from (V-) + 1.4V to (V+) - 1.4V for CSO:SHE or (V-) + 0.15V to (V+) - 0.15V for CSO:FRE. |
| 7 | V+ | power_in | Positive power supply pin; supply voltage range ±2.25V to ±18V dual supply or 4.5V to 36V single supply. |
| 8 | RG | passive | Gain setting pin; connect external resistor between pins 1 and 8 to program gain according to formula G = 1 + 49.4kΩ/RG. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `INA129P`
- Footprint: `Package_DIP:DIP-8_W7.62mm`
- 3D model: PDIP-8 (KiCad packages3D, STEP)
- 3D model files: `ina129p-etched.step` / `ina129p-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ina129p.step` / `ina129p.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/ina128) (42 pp, sha256 `281c28fb0fb9d538`, retrieved 2026-09-26, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (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](docs/ina129p-datasheet.pdf)