# INA2126U

**Texas Instruments** · Instrumentation Amplifiers · SOIC-16

INA2126U from Texas Instruments, in a SOIC-16. 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 | V-INA | power_in | Inverting input of amplifier A; input voltage is clamped by internal diodes to the supply rails, and source current should be limited to 10 mA if the signal exceeds the supplies. |
| 2 | V+INA | power_in | Non-inverting input of amplifier A; input voltage is clamped by internal diodes to the supply rails, and source current should be limited to 10 mA if the signal exceeds the supplies. |
| 3 | RGA | passive | Gain-set pin for amplifier A; for gains greater than 5, a gain resistor RG is placed between pins 3 and 4 (G = 5 + 80 kΩ / RG). |
| 4 | RGA | passive | Gain-set pin for amplifier A; for gains greater than 5, a gain resistor RG is placed between pins 3 and 4 (G = 5 + 80 kΩ / RG). |
| 5 | RefA | input | Reference input for amplifier A; this pin must be driven from a low-impedance source or tied to ground. |
| 6 | VOA | output | Output of amplifier A; connect to SenseA (pin 7) for proper operation. |
| 7 | SenseA | input | Feedback sense input for amplifier A; must be connected to output VOA (pin 6) for proper operation. |
| 8 | V- | power_in | Negative power supply; dual supply range is ±1.35 V to ±18 V, or single supply 2.7 V to 36 V (V- to V+). |
| 9 | V+ | power_in | Positive power supply; dual supply range is ±1.35 V to ±18 V, or single supply 2.7 V to 36 V (V- to V+). |
| 10 | SenseB | input | Feedback sense input for amplifier B; must be connected to output VOB (pin 11) for proper operation. |
| 11 | VOB | output | Output of amplifier B; connect to SenseB (pin 10) for proper operation. |
| 12 | RefB | input | Reference input for amplifier B; this pin must be driven from a low-impedance source or tied to ground. |
| 13 | RGB | passive | Gain-set pin for amplifier B; for gains greater than 5, a gain resistor RG is placed between pins 13 and 14 (G = 5 + 80 kΩ / RG). |
| 14 | RGB | passive | Gain-set pin for amplifier B; for gains greater than 5, a gain resistor RG is placed between pins 13 and 14 (G = 5 + 80 kΩ / RG). |
| 15 | V+INB | power_in | Non-inverting input of amplifier B; input voltage is clamped by internal diodes to the supply rails, and source current should be limited to 10 mA if the signal exceeds the supplies. |
| 16 | V-INB | power_in | Inverting input of amplifier B; input voltage is clamped by internal diodes to the supply rails, and source current should be limited to 10 mA if the signal exceeds the supplies. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16 |
| Category | Amplifiers/Comparators |
| Pins | 16 |

## CAD (KiCad official)

- Symbol: `INA2126U`
- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`
- 3D model: SOIC-16 (KiCad packages3D, STEP)
- 3D model files: `ina2126u-etched.step` / `ina2126u-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ina2126u.step` / `ina2126u.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/ina126) (38 pp, sha256 `67a5c87b926613db`, retrieved 2026-10-07, 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 0.3`, 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](docs/ina2126u-datasheet.pdf)