# GS8721-CR

**Gainsil** · Operational Amplifier · SC-70-5

GS8721-CR from Gainsil, in a SC-70-5. 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 | OUT | output | Amplifier output with rail-to-rail swing, typically within 15mV of the supply rail at RL=10kΩ and 100mV at RL=600Ω. |
| 2 | VSS | power_in | Negative supply (ground in single-supply operation); VDD to VSS is rated -0.5V to +7.5V absolute maximum and operates from 2.1V to 5.5V. |
| 3 | IN+ | input | Non-inverting input with rail-to-rail common-mode range of VSS-0.1V to VDD+0.1V and 1pA typical bias current. |
| 4 | IN- | input | Inverting input with rail-to-rail common-mode range of VSS-0.1V to VDD+0.1V and 1pA typical bias current. |
| 5 | VDD | power_in | Positive supply, 2.1V to 5.5V single supply, with a 0.1μF ceramic bypass capacitor placed close to the pin. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Gainsil |
| Package | SC-70-5 |
| 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 |
|---|---|---|---|---|---|---|---|
| Input Offset Voltage (VOS), max at +25℃ | VOS |  | 0.8 | 3.5 | mV |  | 3 |
| Input Offset Voltage (VOS), max over temperature 0℃ to 70℃ | VOS |  |  | 3.9 | mV | 0℃ to 70℃ | 3 |
| Input Offset Voltage (VOS), max over temperature -40℃ to 85℃ | VOS |  |  | 4.3 | mV | -40℃ to 85℃ | 3 |
| Input Offset Voltage (VOS), max over temperature -40℃ to 125℃ | VOS |  |  | 4.6 | mV | -40℃ to 125℃ | 3 |
| Input Common Mode Voltage Range (VCM) | VCM | -0.1 |  | 5.6 | V | VS = 5.5V | 3 |
| Output Current (IOUT), min at +25℃ | IOUT | 55 | 70 |  | mA |  | 3 |
| Output Current (IOUT), min over temperature 0℃ to 70℃ | IOUT | 45 |  |  | mA | 0℃ to 70℃ | 3 |
| Output Current (IOUT), min over temperature -40℃ to 85℃ | IOUT | 42 |  |  | mA | -40℃ to 85℃ | 3 |
| Output Current (IOUT), min over temperature -40℃ to 125℃ | IOUT | 38 |  |  | mA | -40℃ to 125℃ | 3 |
| Power Supply Rejection Ratio (PSRR), min at +25℃ | PSRR | 74 | 91 |  | dB | VS = +2.5V to +5.5V | 3 |
| Power Supply Rejection Ratio (PSRR), min over temperature 0℃ to 70℃ | PSRR | 72 |  |  | dB | VS = +2.5V to +5.5V; 0℃ to 70℃ | 3 |
| Power Supply Rejection Ratio (PSRR), min over temperature -40℃ to 85℃ | PSRR | 72 |  |  | dB | VS = +2.5V to +5.5V; -40℃ to 85℃ | 3 |
| Power Supply Rejection Ratio (PSRR), min over temperature -40℃ to 125℃ | PSRR | 68 |  |  | dB | VS = +2.5V to +5.5V; -40℃ to 125℃ | 3 |
| Quiescent Current/Amplifier (IQ), max at +25℃ | IQ |  | 1.1 | 1.5 | mA | IOUT = 0 | 3 |
| Quiescent Current/Amplifier (IQ), max over temperature 0℃ to 70℃ | IQ |  |  | 1.65 | mA | IOUT = 0; 0℃ to 70℃ | 3 |
| Quiescent Current/Amplifier (IQ), max over temperature -40℃ to 85℃ | IQ |  |  | 1.7 | mA | IOUT = 0; -40℃ to 85℃ | 3 |
| Quiescent Current/Amplifier (IQ), max over temperature -40℃ to 125℃ | IQ |  |  | 1.85 | mA | IOUT = 0; -40℃ to 125℃ | 3 |
| Operating Voltage Range |  | 2.1 |  | 5.5 | V |  | 3 |
| DISABLE Voltage-Off |  |  |  | 0.8 | V |  | 3 |
| DISABLE Voltage-On |  | 2 |  |  | V |  | 3 |
| Power Supply Voltage (VDD to Vss) |  | -0.5 |  | 7.5 | V |  | 2 |
| PDB Input Voltage |  |  |  | 7 | V |  | 2 |
| Operating Temperature Range |  | -40 |  | 125 | °C |  | 2 |
| Junction Temperature |  |  |  | 160 | °C |  | 2 |
| Storage Temperature Range |  | -55 |  | 150 | °C |  | 2 |
| Lead Temperature (soldering) |  |  |  | 260 | °C | soldering, 10 sec | 2 |
| Package Thermal Resistance, SC70-5, θJA | θJA |  | 333 |  | °C/W | TA = +25℃; SC70-5 | 2 |
| ESD Susceptibility, HBM |  |  |  | 8 | KV | HBM | 2 |
| ESD Susceptibility, MM |  |  |  | 400 | V | MM | 2 |

## CAD (KiCad official)

- Symbol: `GS8721-CR`
- Footprint: `Package_TO_SOT_SMD:SOT-353_SC-70-5`
- 3D model: SC-70-5 (KiCad packages3D, STEP)
- 3D model files: `gs8721-cr-etched.step` / `gs8721-cr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `gs8721-cr.step` / `gs8721-cr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Gainsil datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588918258015064065) (18 pp, sha256 `7d4bae44a19b3397`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/gs8721-cr-datasheet.pdf)