OPA1678 Dual low distortion, low noise, tool box audio op amp  | TI.com

OPA1678 (ACTIVE) Dual low distortion, low noise, tool box audio op amp 

Dual low distortion, low noise, tool box audio op amp  - OPA1678
Datasheet
OPA167x Low-Distortion Audio Operational Amplifiers datasheet (Rev. C)
 

Recommended alternative device

For a rail-to-rail input and output device with similar performance, see the  OPA1671.

Description

The OPA1678 (dual-channel) and OPA1679 (quad-channel) operational amplifiers offer higher system-level performance over legacy op amps commonly used in audio circuitry. The OPA167x amplifiers achieve a low 4.5-nV/√Hz noise density and low distortion of 0.0001% at 1 kHz, which improves audio signal fidelity. They also offer rail-to-rail output swing to within 800 mV with a 2-kΩ load, which increases headroom and maximizes dynamic range.

The OPA1678 and OPA1679 operate over a very wide supply range of ±2.25 V to ±18 V or (4.5 V to 36 V) on only 2 mA of supply current to accommodate the power supply constraints of many types of audio products. These op amps are unity-gain stable and have excellent dynamic behavior over a wide range of load conditions allowing them to be used in many audio circuits.

The OPA167x amplifiers use completely independent internal circuitry for lowest crosstalk and freedom from interactions between channels, even when overdriven or overloaded.

The OPA167x temperature ranges are specified from –40°C to +85°C.

 

Features

  • Low noise: 4.5 nV/√Hz at 1 kHz
  • Low distortion: 0.0001% at 1 kHz
  • High open-loop gain: 114 dB
  • High common-mode rejection: 110 dB
  • Low quiescent current:
    • 2 mA per channel
  • Low input bias current: 10 pA (typical)
  • Slew rate: 9 V/µs
  • Wide gain bandwidth: 16 MHz (G = 1)
  • Unity-gain stable
  • Rail-to-rail output
  • Wide supply range:
    • ±2.25 V to ±18 V, or 4.5 V to 36 V
  • Dual-channel and quad-channel versions
  • Small package sizes:
    • Dual-channel: SO-8, MSOP-8, SON-8
    • Quad-channel: SO-14, TSSOP-14, QFN-16

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Parametrics

Compare all products in Audio op amps Email Download to Excel
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)
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)
See datasheet (SON)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)    		 FET     110      
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    
OPA1656 Samples not available 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    
OPA1671 Order now 1     1.7     5.5     13     5     In
Out    		 1.25     0.94     7       0.00035     Catalog     -40 to 125     SC70 | 5     66     5SC70: 4 mm2: 2.1 x 2 (SC70 | 5)     CMOS     102      
OPA1679 Order now 4     4.5     36     16     9