# LMP91200MTX

**Texas Instruments** · ADCs/DACs - Special Purpose · TSSOP-16

LMP91200MTX from Texas Instruments, in a TSSOP-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 | VDD | power_in | Positive power supply, 1.8 V to 5.5 V operating range. |
| 2 | NC | unconnected | No connect, leave floating. |
| 3 | NC | unconnected | No connect, leave floating. |
| 4 | GUARD1 | output | Active guard pin at same potential as INP for parasitic leakage reduction. |
| 5 | INP | input | Noninverting analog input of pH buffer, 0 V to 3.3 V operating range. |
| 6 | GUARD2 | output | Active guard pin at same potential as INP for parasitic leakage reduction. |
| 7 | VCMHI | output | High impedance common-mode output with 250 kΩ output impedance. |
| 8 | VCM | output | Buffered common-mode output with 4 Ω output impedance. |
| 9 | VREF | power_in | Voltage reference input with 500 kΩ input impedance. |
| 10 | GND | power_in | Analog ground. |
| 11 | VOCM | output | Output common-mode voltage for differential measurements. |
| 12 | VOUT | output | Analog output from pH buffer amplifier. |
| 13 | GND | power_in | Analog ground. |
| 14 | VDD | power_in | Positive power supply connection. |
| 15 | GND | power_in | Analog ground. |
| 16 | GND | power_in | Analog ground. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-16 |
| Category | Data Acquisition |
| Pins | 16 |

## CAD (KiCad official)

- Symbol: `LMP91200MTX`
- Footprint: `Package_SO:TSSOP-16_4.4x5mm_P0.65mm`
- 3D model: TSSOP-16 (KiCad packages3D, STEP)
- 3D model files: `lmp91200mtx-etched.step` / `lmp91200mtx-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lmp91200mtx.step` / `lmp91200mtx.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/lmp91200) (25 pp, sha256 `037b1b0bfd82bb87`, retrieved 2026-09-27, tier: lcsc)
- **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/lmp91200mtx-datasheet.pdf)