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OPA1656
  • OPA1656
  • OPA1656
  • OPA1656

OPA1656

ACTIVE

SoundPlus™ ultra-low noise and distortion, Burr-Brown™ audio operational amplifier

Texas Instruments OPA1656 Product Info

1 April 2026 4

Parameters

Number of channels

2

Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V)

4.5

Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V)

36

GBW (typ) (MHz)

53

Slew rate (typ) (V/µs)

24

Rail-to-rail

Out

Vos (offset voltage at 25°C) (max) (mV)

1

Iq per channel (typ) (mA)

3.9

Vn at 1 kHz (typ) (nV√Hz)

4.3

Features

Burr-Brown™ Audio, Premium Sound

THD + N at 1 kHz (typ) (%)

0.000029

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Iout (typ) (A)

0.1

Product type

Premier

Architecture

CMOS

CMRR (typ) (dB)

120

Input bias current (max) (pA)

20

Package

SOIC (D)-8-29.4 mm² 4.9 x 6

Features

  • Ultra-low noise:
    • Voltage noise: 2.9 nV/√Hz at 10 kHz
    • Current noise: 6 fA/√Hz at 1 kHz
  • Low distortion:
    • 0.000029% (–131 dB) at 1 kHz
    • 0.000035% (–129 dB) at 20 kHz
  • High open-loop gain: 150 dB
  • High output current: 100 mA
  • Low input bias current: 10 pA
  • Slew rate: 24 V/µs
  • Gain bandwidth product: 53 MHz
  • Rail-to-rail output
  • Wide supply range: ±2.25 V to ±18 V or 4.5 V to 36 V
  • Quiescent current: 3.9 mA per channel
  • Ultra-low noise:
    • Voltage noise: 2.9 nV/√Hz at 10 kHz
    • Current noise: 6 fA/√Hz at 1 kHz
  • Low distortion:
    • 0.000029% (–131 dB) at 1 kHz
    • 0.000035% (–129 dB) at 20 kHz
  • High open-loop gain: 150 dB
  • High output current: 100 mA
  • Low input bias current: 10 pA
  • Slew rate: 24 V/µs
  • Gain bandwidth product: 53 MHz
  • Rail-to-rail output
  • Wide supply range: ±2.25 V to ±18 V or 4.5 V to 36 V
  • Quiescent current: 3.9 mA per channel

Description

The OPA1655 and OPA1656 (OPA165x) are Burr-Brown™ op amps designed specifically for audio and industrial applications, where maintaining signal fidelity is crucial. The FET-input architecture achieves a low 2.9‑nV/√Hz voltage noise density and 6‑fA/√Hz current noise density, allowing for very-low noise performance in a wide variety of circuits. The high bandwidth and high open-loop-gain design of the OPA165x delivers a low distortion of 0.000035% (–129 dB) at 20 kHz, and improves audio signal fidelity across the full audio bandwidth. These devices also feature excellent output current drive capability, offering rail-to-rail output swing to within 250 mV of the power supplies with a 2‑kΩ load, and can deliver 100 mA of output current.

The OPA165x operate over a very wide supply range of ±2.25 V to ±18 V or (4.5 V to 36 V) on 3.9 mA of supply current to accommodate the power-supply constraints of many types of audio products. The temperature range is specified from –40°C to +125°C.

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