# LMV321B-TR

**3PEAK** · Operational Amplifier · SOT-23-5

LMV321B-TR from 3PEAK, in a SOT-23-5. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | +In | input | Non-inverting analog input. Rail-to-rail input; common-mode range extends from (V-) - 0.1 V to (V+) + 0.1 V. Input bias current ~1 pA at 25 °C. ESD-protected with clamp diodes to each rail; keep input current below ±10 mA if the pin is driven beyond the supplies. |
| 2 | -Vs | power_in | Negative supply rail (typically GND in single-supply operation). Total supply voltage (V+) - (V-) must not exceed 6 V absolute maximum; recommended 2.5 V to 5.5 V total. |
| 3 | -In | input | Inverting analog input. Rail-to-rail input; common-mode range extends 100 mV beyond each supply rail. Input bias current ~1 pA at 25 °C; input capacitance 8 pF differential / 7 pF common-mode. |
| 4 | Out | output | Rail-to-rail analog output. Swings to within 15 mV of each supply rail with a 10 kΩ load. Short-circuit current typically 100 mA (indefinite short-circuit duration allowed, subject to junction-temperature limits). |
| 5 | +Vs | power_in | Positive supply rail. Operating range 2.5 V to 5.5 V referenced to -Vs; absolute maximum (+Vs) - (-Vs) = 6 V. Quiescent current 80 µA typical (130 µA max) per amplifier. Bypass with a local decoupling capacitor to -Vs. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | 3PEAK |
| Package | SOT-23-5 |
| Category | Op-amp/Cmp |
| Pins | 5 |

## Ordering variants

Same part, different packaging or reel option.

- `LMV321B-TR`
- `LMV321B-TRCR`

## CAD (KiCad official)

- Symbol: `LMV321B-TR`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `lmv321b-tr-etched.step` / `lmv321b-tr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lmv321b-tr.step` / `lmv321b-tr.glb` are the bare package body.

## 3D model downloads

Two STEP files. Same geometry, different body top:

| File | Size | Use it when |
|---|---|---|
| [`lmv321b-tr.step`](lmv321b-tr.step) | 85 KB | You want the bare part, or you mark your own boards. |
| [`lmv321b-tr-etched.step`](lmv321b-tr-etched.step) | 1.6 MB | You want the part with `LMV321B-TR` already on it. |

The marking in the etched file is real recessed geometry cut into the solid, not a
texture or a decal: 405 faces against 102 in the bare model. It
survives export, section views, and rendering in any CAD tool, and it drops straight
into KiCad or Fusion with no extra setup.

## Provenance

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

- **Datasheet:** [3PEAK datasheet](docs/lmv321b-tr-datasheet.pdf) (16 pp, sha256 `77ea0faba82619fb`, retrieved 2026-08-17, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/lmv321b-tr-datasheet.pdf)