# CSA231MATSSOP8

**analogysemi** · Current-Sensing Amplifiers · TSSOP-8

CSA231MATSSOP8 from analogysemi, in a TSSOP-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 | NC | unconnected | No internal connection; do not connect. |
| 2 | RS+ | input | External sense resistor power-side connection; input common-mode range 0V to 76V (abs max 80V). |
| 3 | RS- | input | External sense resistor load-side connection; input common-mode range 0V to 76V (abs max 80V). |
| 4 | GND | power_in | Ground. |
| 5 | VDD | power_in | Supply voltage 2.7V to 5.5V, bypass with at least 100nF capacitor to GND. |
| 6 | REF2 | input | Reference voltage input 2, typically connected to GND; range GND to VDD. |
| 7 | REF1 | input | Reference voltage input 1, typically connected to VDD; range GND to VDD. |
| 8 | OUT | output | Output voltage referenced to 1/2 (REF1 + REF2). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | analogysemi |
| Package | TSSOP-8 |
| Category | Operational Amplifier/Comparator |
| Pins | 8 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply Voltage | VDD | 2.7 |  | 5.5 | V | Guaranteed by PSRR | 7 |
| Supply Current | IDD |  | 560 | 800 | µA | TA = 25°C | 7 |
| Supply Current (temp) | IDD |  |  | 850 | µA | -40°C < TA < 125°C | 7 |
| Power-Supply Rejection Ratio | PSRR | 105 | 108 |  | dB | 2.7V ≤ VDD ≤ 5.5V | 7 |
| Input Common-Mode Voltage Range | VCM | 0 |  | 76 | V | Guaranteed by CMRR | 7 |
| Input Bias Current | IRS+, IRS- |  | 0.003 | 0.1 | µA |  | 7 |
| Input Offset Current | IRS+, IRS- |  |  | 0.2 | µA |  | 7 |
| Input Leakage Current | IRS+, IRS- |  |  | 0.2 | µA | VDD = 0V, VRS+ = VRS- = 76V | 7 |
| Common-Mode Rejection Ratio | CMRR | 130 | 159 |  | dB | 0V < VRS+ < 76V | 7 |
| Input Offset Voltage | VOS | -60 | 8 | 60 | µV | TA = 25°C | 7 |
| Input Offset Voltage (temp) | VOS | -150 | 50 | 150 | µV | -40°C ≤ TA ≤ 125°C | 7 |
| Gain Error | GE |  | 0.02 | 0.1 | % | TA = 25°C | 7 |
| Gain Error | GE |  |  | 0.25 | % | -40°C ≤ TA ≤ 85°C | 7 |
| Gain Error | GE |  |  | 0.3 | % | -40°C ≤ TA ≤ 125°C | 7 |
| Output Low Voltage | VOL |  |  | 10 | mV | Sink 500µA | 7 |
| VREF Input Range | VREF | 0 |  | 5.5 | V | GND to VDD | 7 |
| Gain | G |  | 20 |  | V/V | CSA231-20 | 7 |
| VREF Resistor | RREF |  | 22.6 |  | kΩ |  | 7 |
| VREF Resistor Match |  |  | 0.1 |  | % |  | 7 |
| Input Offset Voltage Drift | TCVOS |  | 50 |  | nV/°C |  | 7 |
| VREF Resistor Temperature Drift | TCRREF |  | 180 |  | Ω/°C |  | 7 |
| Reference Voltage Rejection Ratio | RVRR |  | 1 |  | µV/V | Input-referred | 7 |
| Output Low Voltage (no load) | VOL |  | 4 |  | mV | No load | 7 |
| Signal Bandwidth | BW |  | 90 |  | kHz | -3dB, all gain configurations, VSENSE > 5mV | 7 |
| Slew Rate | SR |  | 0.5 |  | V/µs |  | 7 |
| AC PSRR | AC PSRR |  | 47 |  | dB | f = 200kHz | 7 |
| AC CMRR | AC CMRR |  | 95 |  | dB | f = 200kHz | 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 |  | 58 |  | nV/√Hz | f = 1kHz | 7 |
| Power-Up Time |  |  | 80 |  | µs |  | 7 |
| Saturation Recovery Time |  |  | 5 |  | µs |  | 7 |
| VDD to GND | VDD | -0.3 |  | 6 | V |  | 5 |
| RS+, RS- to GND |  | -0.3 |  | 80 | V |  | 5 |
| REF1, REF2 to GND |  | -0.3 |  |  | V | max VDD + 0.3 | 5 |
| 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 | -40 |  | 125 | °C |  | 5 |
| Junction temperature | TJ |  |  | 150 | °C |  | 5 |
| Storage temperature | Tstg | -65 |  | 150 | °C |  | 5 |
| Lead temperature |  |  |  | 300 | °C | soldering, 10s | 5 |
| Soldering (reflow) |  |  |  | 260 | °C |  | 5 |
| ESD HBM | V(ESD) | -6000 |  | 6000 | V | HBM per ANSI/ESDA/JEDEC JS-001 | 5 |
| ESD CDM | V(ESD) | -1000 |  | 1000 | V | CDM per JESD22-C101 | 5 |
| Power Supply VDD to GND | VDD | 2.7 | 3.3 | 5.5 | V |  | 6 |
| VRS+ and VRS- to GND |  | 0 |  | 76 | V |  | 6 |
| VRS+, VRS- |  | -1 |  | 1 | V |  | 6 |
| Operating Ambient Temperature | TA | -40 |  | 125 | °C |  | 6 |
| Junction-to-Ambient Thermal Resistance | RθJA |  | 187 |  | °C/W | TSSOP-8 | 6 |
| Junction-to-Board Thermal Resistance | RθJB |  | 120 |  | °C/W | TSSOP-8 | 6 |
| Junction-to-Case (Top) Thermal Resistance | RθJC(top) |  | 46 |  | °C/W | TSSOP-8 | 6 |
| Junction-to-Case (Bottom) Thermal Resistance | RθJC(bot) |  | 82 |  | °C/W | TSSOP-8 | 6 |

## CAD (KiCad official)

- Symbol: `CSA231MATSSOP8`
- Footprint: `Package_SO:TSSOP-8_3x3mm_P0.65mm`
- 3D model: TSSOP-8 (KiCad packages3D, STEP)
- 3D model files: `csa231matssop8-etched.step` / `csa231matssop8-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `csa231matssop8.step` / `csa231matssop8.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [analogysemi datasheet](docs/csa231matssop8-datasheet.pdf) (18 pp, sha256 `014c0566634450de`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/csa231matssop8-datasheet.pdf)