# CSA220MASOT235

**analogysemi** · Current Sense Amplifiers · SOT23-5

CSA220MASOT235 from analogysemi, in a SOT23-5. 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 | GND | power_in | Power ground pin and reference for the supply bypass capacitor; absolute voltage range on the RS+ and RS- inputs is referenced to GND, and VDD to GND is rated -0.3 V to 6.0 V. |
| 2 | OUT | output | Sense amplifier output; Table 8 gives VOL of 10 mV with 500 µA sink and VOH of VDD - 0.01 V with 500 µA source, and capacitive load is limited to 500 pF without an isolation resistor. |
| 3 | VDD | power_in | Supply voltage input, recommended 2.7 V to 5.5 V (absolute maximum -0.3 V to 6.0 V), with at least a 100 nF capacitor connected to GND. |
| 4 | RS- | input | External sense-resistor load-side connection; absolute input voltage is limited to GND to 76 V and continuous input current to ±20 mA. |
| 5 | RS+ | input | External sense-resistor power-side connection; absolute input voltage is limited to GND to 76 V, and RS+ to RS- is rated ±80 V for 1 s maximum due to package thermal dissipation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | analogysemi |
| Package | SOT23-5 |
| Category | Amplifiers/Comparators |
| Pins | 5 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Voltage VDD to GND |  | -0.3 |  | 6 | V |  | 5 |
| Voltage RS+, RS- to GND |  | -0.3 |  | 80 | V |  | 5 |
| Voltage RS+ to RS- |  | -80 |  | 80 | V | 1s maximum duration due to package thermal dissipation | 5 |
| Continuous input current (any pin) |  | -20 |  | 20 | mA |  | 5 |
| Operating temperature TA | TA | -40 |  | 125 | °C |  | 5 |
| Junction temperature TJ | TJ |  |  | 150 | °C |  | 5 |
| Storage temperature Tstg | Tstg | -65 |  | 150 | °C |  | 5 |
| Lead soldering |  |  |  | 300 | °C | 10s | 5 |
| Soldering (reflow) |  |  |  | 260 | °C |  | 5 |
| Power supply, VDD to GND | VDD | 2.7 | 3.3 | 5.5 | V |  | 6 |
| Absolute input voltage |  |  |  | 76 | V |  | 6 |
| Operating ambient temperature | TA | -40 |  | 125 | °C |  | 6 |
| Supply voltage | VDD | 2.7 |  | 5.5 | V | Guaranteed by PSRR | 7 |
| Supply current | IDD |  | 300 | 385 | µA | TA = 25°C | 7 |
| Supply current | IDD |  |  | 400 | µA | -40°C < TA < 125°C | 7 |
| Power-supply rejection ratio | PSRR | 105 | 130 |  | dB | 2.7V ≤ VDD ≤ 5.5V | 7 |
| Input common-mode voltage range | VCM | 0 |  | 76 | V | Guaranteed by CMRR | 7 |
| Input bias current at VRS+ and VRS- | IRS+, IRS- |  |  | 40 | nA |  | 7 |
| Input offset current | IRS+, IRS- |  |  | 80 | nA |  | 7 |
| Input leakage current | IRS+, IRS- |  |  | 0.04 | µA | VDD = 0V, VRS+ = VRS- = 76V | 7 |
| Common-mode rejection ratio | CMRR | 130 | 157 |  | dB | 0V < VRS+ < 76V | 7 |
| Input offset voltage (TA = 25°C) | VOS | -5 |  | 5 | µV | TA = 25°C | 7 |
| Input offset voltage (-40°C to 125°C) | VOS | -60 | 20 | 60 | µV | -40°C ≤ TA ≤ 125°C | 7 |
| Input offset voltage drift | TCVOS |  |  | 60 | nV/°C | Gain = 20 | 7 |
| Gain error | GE |  | 0.02 | 0.1 | % | TA = 25°C | 7 |
| Gain error | GE |  |  | 0.16 | % | -40°C ≤ TA ≤ 85°C | 7 |
| Gain error | GE |  |  | 0.25 | % | -40°C ≤ TA ≤ 125°C | 7 |
| Output low voltage | VOL |  |  | 10 | mV | Sink 500µA | 7 |
| Output low voltage | VOL |  |  | 4 | mV | No load | 7 |
| Input sense voltage gain (CSA220-20) | G |  | 20 |  | V/V | CSA220-20 | 7 |
| Signal bandwidth | BW |  | 50 |  | kHz | -3dB, all gain configurations, VSENSE > 5mV | 7 |
| Slew rate | SR |  | 0.2 |  | V/µs |  | 7 |
| Capacitive load stability | CLOAD |  |  | 20 | nF | With 250Ω isolation resistor | 7 |
| Capacitive load stability | CLOAD |  |  | 500 | pF | Without any isolation resistor | 7 |
| Input voltage-noise density | en |  | 68 |  | nV/√Hz | f = 1kHz | 7 |
| Input voltage-noise (0.1 Hz to 10 Hz) |  |  | 2.8 |  | µVPP | 0.1Hz to 10Hz | 7 |
| Junction-to-ambient thermal resistance | RθJA |  | 168 |  | °C/W |  | 6 |
| Junction-to-board thermal resistance | RθJB |  | 39 |  | °C/W |  | 6 |
| Junction-to-case (top) thermal resistance | RθJC(top) |  | 103 |  | °C/W |  | 6 |
| Junction-to-case (bottom) thermal resistance | RθJC(bot) |  | 66 |  | °C/W |  | 6 |
| Junction-to-top characterization parameter | ψJT |  | 10 |  | °C/W |  | 6 |
| Junction-to-board characterization parameter | ψJB |  | 36 |  | °C/W |  | 6 |

## CAD (KiCad official)

- Symbol: `CSA220MASOT235`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT23-5 (KiCad packages3D, STEP)
- 3D model files: `csa220masot235-etched.step` / `csa220masot235-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `csa220masot235.step` / `csa220masot235.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [analogysemi datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603010255563333632) (14 pp, sha256 `2d652f91e1250e0a`, retrieved 2026-10-19, tier: lcsc)
- **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/csa220masot235-datasheet.pdf)