# OPA2691ID

**Texas Instruments** · Operational Amplifier · SOIC-8

OPA2691ID from Texas Instruments, in a SOIC-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 | Out A | output | Channel A output, rated for ±190mA output current at +25°C (min) with a no-load output swing of ±4.0V (min). |
| 2 | -In A | input | Channel A inverting input, with the input voltage range limited to ±VS and the differential input voltage limited to ±1.2V. |
| 3 | +In A | input | Channel A noninverting input, with the input voltage range limited to ±VS and the differential input voltage limited to ±1.2V. |
| 4 | -VS | power_in | Negative power supply; dual-supply operation is specified from ±2.5V to ±6V, with an absolute maximum supply of ±6.5VDC. |
| 5 | +In B | input | Channel B noninverting input, with the input voltage range limited to ±VS and the differential input voltage limited to ±1.2V. |
| 6 | -In B | input | Channel B inverting input, with the input voltage range limited to ±VS and the differential input voltage limited to ±1.2V. |
| 7 | Out B | output | Channel B output, rated for ±190mA output current at +25°C (min) with a no-load output swing of ±4.0V (min). |
| 8 | +VS | power_in | Positive power supply; single-supply operation is specified from +5V to +12V, with an absolute maximum supply of ±6.5VDC. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Amplifiers/Comparators |
| 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 |
|---|---|---|---|---|---|---|---|
| Power Supply (absolute maximum, ±6.5 VDC) |  | -6.5 |  | 6.5 | V |  | 2 |
| Differential Input Voltage |  | -1.2 |  | 1.2 | V |  | 2 |
| Storage Temperature Range |  | -65 |  | 125 | °C | D, 14D | 2 |
| Lead Temperature (soldering, 10s) |  |  |  | 300 | °C | soldering, 10 s | 2 |
| Junction Temperature | TJ |  |  | 175 | °C |  | 2 |
| ESD Performance HBM |  |  |  | 2000 | V | HBM | 2 |
| ESD Performance CDM |  |  |  | 1500 | V | CDM | 2 |
| Specification Temperature Range |  | -40 |  | 85 | °C | Specification: D package (SO-8) | 3 |
| Small-Signal Bandwidth |  | 180 | 225 |  | MHz | VS=±5V; G=+2, RF=402Ω; -40°C to +85°C | 3 |
| Peaking at a Gain of +1 |  |  | 0.2 | 2 | dB | VS=±5V; RF=453Ω, VO=0.5Vp-p; -40°C to +85°C | 3 |
| Slew Rate |  | 1350 | 2100 |  | V/µs | VS=±5V; G=+2, 4V step; -40°C to +85°C | 3 |
| 2nd-Harmonic Distortion (RL = 100Ω) |  |  | -70 | -58 | dBc | VS=±5V; G=+2, f=5MHz, VO=2Vp-p; -40°C to +85°C | 3 |
| 3rd-Harmonic Distortion (RL = 100Ω) |  |  | -74 | -68 | dBc | VS=±5V; G=+2, f=5MHz, VO=2Vp-p; -40°C to +85°C | 3 |
| Input Voltage Noise |  |  | 1.7 | 3.1 | nV/√Hz | f > 1MHz; -40°C to +85°C | 3 |
| Open-Loop Transimpedance Gain | ZOL | 100 | 225 |  | kΩ | VS=±5V; VO=0V, RL=100Ω; -40°C to +85°C | 3 |
| Input Offset Voltage |  |  | 0.8 | 4.3 | mV | VS=±5V; VCM=0V; -40°C to +85°C | 3 |
| Average Offset Voltage Drift |  |  | 12 | 20 | µV/°C | VS=±5V; VCM=0V | 3 |
| Noninverting Input Bias Current |  |  | 15 | 45 | µA | VS=±5V; VCM=0V; -40°C to +85°C | 3 |
| Inverting Input Bias Current |  |  | 5 | 40 | µA | VS=±5V; VCM=0V; -40°C to +85°C | 3 |
| Average Inverting Input Bias Current Drift |  |  | 90 | 200 | nA°/C | VS=±5V; VCM=0V | 3 |
| Common-Mode Input Range (CMIR) |  | 3.2 | 3.5 |  | V | VS=±5V; -40°C to +85°C | 3 |
| Common-Mode Rejection (CMRR) |  | 50 | 56 |  | dB | VS=±5V; VCM=0V; -40°C to +85°C | 3 |
| Voltage Output Swing (No Load) |  | 3.6 | 4 |  | V | VS=±5V; no load; -40°C to +85°C | 3 |
| Voltage Output Swing (100Ω Load) |  | 3.3 | 3.9 |  | V | VS=±5V; RL=100Ω; -40°C to +85°C | 3 |
| Current Output, Sourcing |  | 100 | 190 |  | mA | VS=±5V; VO=0; -40°C to +85°C | 3 |
| Current Output, Sinking |  | -100 | -190 |  | mA | VS=±5V; VO=0; -40°C to +85°C | 3 |
| Maximum Operating Voltage Range |  |  |  | 6 | V |  | 3 |
| Minimum Operating Voltage Range |  | 2 |  |  | V |  | 3 |
| Max Quiescent Current |  |  | 10.2 | 11.5 | mA | VS=±5V, both channels; -40°C to +85°C | 3 |
| Min Quiescent Current |  | 8.9 | 10.2 |  | mA | VS=±5V, both channels; -40°C to +85°C | 3 |
| Power-Supply Rejection Ratio (-PSRR) |  | 49 | 58 |  | dB | Input referred; -40°C to +85°C | 3 |
| Small-Signal Bandwidth |  | 140 | 190 |  | MHz | VS=+5V; G=+2, RF=453Ω; -40°C to +85°C | 4 |
| Peaking at a Gain of +1 |  |  | 0.2 | 3 | dB | VS=+5V; RF=649Ω, VO<0.5Vp-p; -40°C to +85°C | 4 |
| Slew Rate |  | 550 | 850 |  | V/µs | VS=+5V; G=+2, 2V step; -40°C to +85°C | 4 |
| 2nd-Harmonic Distortion (RL = 100Ω to VS/2) |  |  | -66 | -56 | dBc | VS=+5V; G=+2, f=5MHz, VO=2Vp-p; -40°C to +85°C | 4 |
| 3rd-Harmonic Distortion (RL = 100Ω to VS/2) |  |  | -71 | -65 | dBc | VS=+5V; G=+2, f=5MHz, VO=2Vp-p; -40°C to +85°C | 4 |
| Input Voltage Noise |  |  | 1.7 | 3.1 | nV/√Hz | f > 1MHz; -40°C to +85°C | 4 |
| Open-Loop Transimpedance Gain | ZOL | 80 | 200 |  | kΩ | VS=+5V; VO=VS/2, RL=100Ω to VS/2; -40°C to +85°C | 4 |
| Input Offset Voltage |  |  | 0.8 | 4.8 | mV | VS=+5V; VCM=2.5V; -40°C to +85°C | 4 |
| Average Offset Voltage Drift |  |  | 12 | 20 | µV/°C | VS=+5V; VCM=2.5V | 4 |
| Noninverting Input Bias Current |  |  | 20 | 56 | µA | VS=+5V; VCM=2.5V; -40°C to +85°C | 4 |
| Inverting Input Bias Current |  |  | 5 | 35 | µA | VS=+5V; VCM=2.5V; -40°C to +85°C | 4 |
| Average Inverting Input Bias Current Drift |  |  | 112 | 250 | nA/°C | VS=+5V; VCM=2.5V | 4 |
| Least Positive Input Voltage |  |  | 1.5 | 1.8 | V |  | 4 |
| Most Positive Input Voltage |  | 3.2 | 3.5 |  | V |  | 4 |
| Common-Mode Rejection (CMRR) |  | 48 | 54 |  | dB | VS=+5V; VCM=2.5V; -40°C to +85°C | 4 |
| Most Positive Output Voltage (No Load) |  | 3.5 | 4 |  | V | VS=+5V; no load; -40°C to +85°C | 4 |
| Most Positive Output Voltage (RL = 100Ω, 2.5V) |  | 3.4 | 3.9 |  | V | VS=+5V; RL=100Ω, 2.5V; -40°C to +85°C | 4 |
| Least Positive Output Voltage (No Load) |  |  | 1 | 1.5 | V | VS=+5V; no load; -40°C to +85°C | 4 |
| Least Positive Output Voltage (RL = 100Ω, 2.5V) |  |  | 1.1 | 1.6 | V | VS=+5V; RL=100Ω, 2.5V; -40°C to +85°C | 4 |
| Current Output, Sourcing |  | 80 | 160 |  | mA | VS=+5V; VO=VS/2; -40°C to +85°C | 4 |
| Current Output, Sinking |  | -80 | -160 |  | mA | VS=+5V; VO=VS/2; -40°C to +85°C | 4 |
| Maximum Single-Supply Operating Voltage |  |  |  | 12 | V |  | 4 |
| Minimum Single-Supply Operating Voltage |  | 4 |  |  | V |  | 4 |
| Max Quiescent Current |  |  | 9 | 10.4 | mA | VS=+5V, both channels; -40°C to +85°C | 4 |
| Min Quiescent Current |  | 7.8 | 9 |  | mA | VS=+5V, both channels; -40°C to +85°C | 4 |
| Specified Operating Voltage |  |  | 5 |  | V | ±5 V supply | 3 |
| Specified Single-Supply Operating Voltage |  |  | 5 |  | V | +5 V single supply | 4 |
| Thermal Resistance, Junction-to-Ambient | θJA |  | 125 |  | °C/W | D SO-8 package | 3 |

## CAD (KiCad official)

- Symbol: `OPA2691ID`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `opa2691id-etched.step` / `opa2691id-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `opa2691id.step` / `opa2691id.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/opa2691.pdf) (33 pp, sha256 `ad1546153594907b`, retrieved 2026-10-12, tier: manufacturer)
- **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/opa2691id-datasheet.pdf)