OPA1656 SoundPlus™ ultra-low noise and distortion, Burr-Brown™ audio operational amplifier | TI.com

OPA1656
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SoundPlus™ ultra-low noise and distortion, Burr-Brown™ audio operational amplifier

 

Recommended alternative parts

  • OPA2156  -  OPA2156 is a higher precision (25µV offset) alternative optimized for industrial applications

Description

The OPA1656 is a Burr-Brown™ operational amplifier (op amp) 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 OPA1656 delivers a low distortion of 0.000035% (–129 dB) at 20 kHz, and improves audio signal fidelity across the full audio bandwidth. This device also features 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 OPA1656 operates 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. The device is offered in an 8-pin SOIC package.

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

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Parametrics

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Part number Order Number of channels (#) Total supply voltage (Min) (+5V=5, +/-5V=10) Total supply voltage (Max) (+5V=5, +/-5V=10) GBW (Typ) (MHz) Slew rate (Typ) (V/us) Rail-to-rail Vos (offset voltage @ 25 C) (Max) (mV) Iq per channel (Typ) (mA) Vn at 1 kHz (Typ) (nV/rtHz) Features THD + N @ 1 kHz (Typ) (%) Rating Operating temperature range (C) Package Group Output current (Typ) (mA) Package size: mm2:W x L (PKG) Architecture CMRR (Typ) (dB) Input bias current (Max) (pA)
OPA1656 Order now 2     4.5     36     50     23     Out     1     4.0     4.0     Burr-Brown™ Audio
Premium Sound    
0.00001     Catalog     -40 to 125     SOIC | 8     100     8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)     CMOS     136     10    
OPA1642 Order now 2     5     36     11     20     In to V-
Out    
3.5     1.8     5.1     Burr-Brown™ Audio
Premium Sound    
0.00005     Catalog     -40 to 85     SOIC | 8
VSSOP | 8    
30     8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)    
FET     126     20    
OPA1678 Order now 2     4.5     36     16     9     Out     2     2     4.5         0.0001     Catalog     -40 to 85     SOIC | 8
SON | 8
VSSOP | 8    
50     8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
8SON: 9 mm2: 3 x 3 (SON | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)    
FET     110      
OPA1688 Order now 2     4.5     36     10     8     In to V-
Out    
1.5     1.6     8     Burr-Brown™ Audio
EMI Hardened
High Cload Drive
Small Size    
0.00005     Catalog     -40 to 85     SOIC | 8
SON | 8    
75     8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
8SON: 9 mm2: 3 x 3 (SON | 8)    
CMOS     120     20