# CSA220LASOT235

**analogysemi** · Current-Sensing Amplifiers · SOT-23-5

CSA220LASOT235 from analogysemi, 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 | GND | power_in | Device ground reference. |
| 2 | OUT | output | Analog output. Output voltage equals (RS+ − RS−) × Gain (10V/V for CSA220-10). VOH ≈ VDD − 15mV (500µA source), VOL ≈ 15mV (500µA sink). |
| 3 | VDD | power_in | Supply voltage input, 2.7V to 5.5V (3.3V nominal). Bypass with at least 100nF ceramic capacitor to GND. |
| 4 | RS- | input | Load-side connection of the external current-sense resistor (inverting input). Common-mode range 0V to 76V relative to GND; RS+ to RS− differential range ±80V (1s max). |
| 5 | RS+ | input | Power-side connection of the external current-sense resistor (non-inverting input). Common-mode range 0V to 76V relative to GND. |

## Key specifications

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

## Ordering variants

Same part, different packaging or reel option.

- `CSA220LASOT235`
- `CSA220MASOT235`
- `CSA220NASOT235`
- `CSA220PASOT235`

## CAD (KiCad official)

- Symbol: `CSA220LASOT235`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `csa220lasot235-etched.step` / `csa220lasot235-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `csa220lasot235.step` / `csa220lasot235.glb` are the bare package body.

## 3D model downloads

Two STEP files. Same geometry, different body top:

| File | Size | Use it when |
|---|---|---|
| [`csa220lasot235.step`](csa220lasot235.step) | 85 KB | You want the bare part, or you mark your own boards. |
| [`csa220lasot235-etched.step`](csa220lasot235-etched.step) | 2.7 MB | You want the part with `CSA220LASOT235` already on it. |

The marking in the etched file is real recessed geometry cut into the solid, not a
texture or a decal: 643 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:** [analogysemi datasheet](docs/csa220lasot235-datasheet.pdf) (13 pp, sha256 `963c8a26e263d7bd`, 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/csa220lasot235-datasheet.pdf)