Specifications
| Type | Description |
|---|---|
| Part Number | OPA1656 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Package Case | D package, 8-pin SOIC |
| Channel Count | 2 |
| Package | D, SOIC, 8-pin |
| Input Voltage Noise Density | 2.9 nV/√Hz |
| Input Current Noise Density | 6 fA/√Hz |
| Total Harmonic Distortion + Noise | 0.000029%, -131 dB |
| Total Harmonic Distortion + Noise | 0.0001%, -120 dB |
| Total Harmonic Distortion + Noise | 0.000029%, -131 dB |
| Total Harmonic Distortion + Noise | 0.000035%, -129 dB |
| Intermodulation Distortion | 0.000018%, -135 dB |
| Intermodulation Distortion | 0.000020%, -134 dB |
| Gain-Bandwidth Product | 53 MHz |
| Unity Gain Bandwidth | 20 MHz |
| Slew Rate | 24 V/µs |
| Full-Power Bandwidth | 3.8 MHz |
| Overload Recovery Time | 100 ns |
| Channel Separation | -135 dB |
| Settling Time | 800 ns |
| Input Voltage Noise | 0.53 µVRMS |
| Input Voltage Noise | 1.9 µVPP |
| Input Voltage Noise Density | 11.8 nV/√Hz |
| Input Voltage Noise Density | 4.3 nV/√Hz |
| Input Voltage Noise Density | 2.9 nV/√Hz |
| Input Current Noise Density | 6 fA/√Hz |
| Input Offset Voltage | typ ±0.5 mV, max ±1 mV |
| Input Offset Voltage Drift | typ 0.3 µV/°C, max 2 µV/°C |
| Power-Supply Rejection Ratio | typ 0.3 µV/V, max 5 µV/V |
| Input Bias Current | typ ±10 pA, max ±20 pA |
| Input Offset Current | typ ±10 pA, max ±20 pA |
| Common-Mode Voltage Range | (V-) to (V+) - 2.25 V |
| Common-Mode Rejection Ratio | min 106 dB, typ 120 dB |
| Differential Input Impedance | 100 MΩ || 9.1 pF |
| Common-Mode Input Impedance | 6 TΩ || 1.9 pF |
| Open-Loop Voltage Gain | min 134 dB, typ 150 dB |
| Open-Loop Voltage Gain | min 134 dB, typ 154 dB |
| Voltage Output Swing | (V-) + 0.25 V to (V+) - 0.25 V |
| Open-Loop Output Impedance | 26 Ω |
| Short-Circuit Current | ±100 mA |
| Capacitive Load Drive | 100 pF |
| Quiescent Current Per Channel | typ 3.9 mA, max 4.6 mA |
| Quiescent Current Per Channel | max 5.0 mA |
| Recommended Single Supply Voltage | min 4.5 V, max 36 V |
| Recommended Dual Supply Voltage | min ±2.25 V, max ±18 V |
| Recommended Operating Temperature | -40°C to +125°C |
| Absolute Maximum Supply Voltage | 40 V |
| Absolute Maximum Input Voltage | (V-) - 0.5 V to (V+) + 0.5 V |
| Absolute Maximum Input Current | -10 mA to +10 mA |
| Absolute Maximum Output Short-Circuit | Continuous |
| Absolute Maximum Operating Temperature | -55°C to +125°C |
| Maximum Junction Temperature | 150°C |
| Storage Temperature | -65°C to +150°C |
| ESD Rating HBM | ±2000 V |
| ESD Rating CDM | ±1000 V |
| Junction-to-Ambient Thermal Resistance | 119.9°C/W |
| Junction-to-Case Top Thermal Resistance | 51.8°C/W |
| Junction-to-Board Thermal Resistance | 65.4°C/W |
| Junction-to-Top Characterization Parameter | 10.0°C/W |
| Junction-to-Board Characterization Parameter | 64.2°C/W |
| Pin 1 | OUT A |
| Pin 2 | -IN A |
| Pin 3 | +IN A |
| Pin 4 | V- |
| Pin 5 | +IN B |
| Pin 6 | -IN B |
| Pin 7 | OUT B |
| Pin 8 | V+ |
| Datasheet Status | request_only |
Product Overview
For circuit design, the device provides 53 MHz gain-bandwidth product, 20 MHz unity-gain bandwidth, 24 V/µs slew rate, 100 ns overload recovery, and 800 ns settling to 0.01% for a 10-V step at G=-1. Recommended operating conditions cover 4.5 V to 36 V single supply, ±2.25 V to ±18 V dual supply, and -40°C to +125°C operating free-air temperature.
Key Features
- Dual FET-input audio op amp with 2 channels
- D package, 8-pin SOIC package option
- 2.9 nV/√Hz input voltage noise density at 10 kHz
- 6 fA/√Hz input current noise density at 1 kHz
- 53 MHz gain-bandwidth product at G=100
- 20 MHz unity-gain bandwidth at G=1
- 24 V/µs slew rate for 10-V step
- 0.000029% THD+N at 1 kHz and 600 Ω
- -135 dB channel separation at 1 kHz
- ±2.25 V to ±18 V recommended dual supply
- 4.5 V to 36 V recommended single supply
- -40°C to +125°C recommended operating temperature
Typical Applications
- Audio signal-chain circuits
- Dual-channel audio amplification
- Low-noise audio stages
- FET-input amplifier circuits
- Audio distortion measurement paths
- Line-level audio output stages
- Single-supply audio designs
- Dual-supply audio designs
Procurement Notes
When requesting a quote for OPA1656, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What type of device is the OPA1656?
The OPA1656 is a Texas Instruments dual FET-input audio operational amplifier in the Signal_Chain category. It provides 2 channels and is offered in a D package, 8-pin SOIC package option.
What supply voltages are recommended for OPA1656?
Recommended operating conditions specify a single supply from 4.5 V to 36 V or a dual supply from ±2.25 V to ±18 V. The recommended operating free-air temperature range is -40°C to +125°C.
What are the key noise specifications for OPA1656?
The OPA1656 is specified with 2.9 nV/√Hz input voltage noise density at 10 kHz and 6 fA/√Hz input current noise density at 1 kHz. Audio-band input voltage noise is 0.53 µVRMS from 20 Hz to 20 kHz.
What is the OPA1656 pinout in the SOIC package?
For the D 8-pin SOIC top view, pins are OUT A, -IN A, +IN A, V-, +IN B, -IN B, OUT B, and V+ on pins 1 through 8 respectively.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: June 30, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.