# LT1999IMS8-50#PBF

**Analog Devices** · Operational Amplifier · MSOP-8

LT1999IMS8-50#PBF from Analog Devices, in a MSOP-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 | V+ | power_in | Power supply voltage with a specified operating range of 4.5V to 5.5V, and lower supply voltages down to approximately 4V are possible but the part is not tested or characterized below 4.5V. |
| 2 | +IN | input | Positive sense input pin, with a common mode input voltage range of -5V to 80V. |
| 3 | -IN | input | Negative sense input pin, with a common mode input voltage range of -5V to 80V. |
| 4 | V+ | power_in | Power supply voltage, tied internally to pin 1, with a specified operating range of 4.5V to 5.5V. |
| 5 | GND | power_in | Ground pin, the reference for the SHDN pin and the device ground. |
| 6 | REF | input | Reference input that sets the output common mode level at mid-supply through a divider of two 160k resistors, and can be overdriven by an external source driving 80k to mid-supply within the LT1999-50 REF input range of 1.125V to V+ - 1.125V. |
| 7 | OUT | output | Voltage output with VOUT = AV·(VSENSE ± VOSI), designed to drive up to 200pF capacitive loads directly, and loads above 200pF should be decoupled with an external resistor of at least 100Ω. |
| 8 | SHDN | input | Shutdown pin that places the device in low power shutdown when pulled to within 0.5V of GND, and an internal 2µA pull-up places the device in the active state when left floating. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | MSOP-8 |
| Category | Amplifiers |
| Pins | 8 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| housing | PC |  | LT1999MPS8-20#PBF LT1999MPS8-20#TRPBF 99MP20 8-Lead Plastic SO -55°C to 150°C LT1999CMS8-50#PBF LT1999CMS8-50#TRPBF LTFPC 8-Lead Plastic MSOP 0°C to 70°C | 3 |

## CAD (KiCad official)

- Symbol: `LT1999IMS8-50#PBF`
- Footprint: `Package_SO:MSOP-8_3x3mm_P0.65mm`
- 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files: `lt1999ims8-50-pbf-etched.step` / `lt1999ims8-50-pbf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lt1999ims8-50-pbf.step` / `lt1999ims8-50-pbf.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Analog Devices datasheet](https://www.analog.com/media/en/technical-documentation/data-sheets/LT1999-10-1999-20-1999-50.pdf) (28 pp, sha256 `524fa5803afdb9fd`, retrieved 2026-11-02, tier: manufacturer)
- **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/lt1999ims8-50-pbf-datasheet.pdf)