Dual FET-Input, Low Distortion Operational Amplifier - OPA2604


Dual FET-Input, Low Distortion Operational Amplifier

Special Note

For newer devices, see OPA1642, OPA1652 or OPA1688.


The OPA2604 is a dual, FET-input operational amplifier designed for enhanced AC performance. Low distortion, low noise, and wide bandwidth provide superior performance in high quality audio and other applications requiring dynamic performance.

New circuit techniques and special laser-trimming of dynamic circuit performance yield low harmonic distortion. The result is an operational amplifier with exceptional sound quality. The low-noise FET input of the OPA2604 provides wide dynamic range, even with high source impedance. Offset voltage is laser-trimmed to minimize the need for interstage coupling capacitors.

The OPA2604 is available in 8-pin plastic mini-DIP and 8-Pin SOIC surface-mount packages, specified for the –25°C to 85°C temperature range.


  • Low Distortion: 0.0003% at 1 kHz
  • Low Noise: 10 nV/√Hz
  • High Slew Rate: 25 V/µs
  • Wide Gain-Bandwidth: 20 MHz
  • Unity-Gain Stable
  • Wide Supply Range: VS = ±4.5 to ±24 V
  • Drives 600-Ω Loads

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Parametrics Compare all products in Precision Amplifier

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)
Vos (Offset Voltage @ 25C) (Max) (mV)
Iq per channel (Typ) (mA)
Vn at 1kHz (Typ) (nV/rtHz)
Offset Drift (Typ) (uV/C)
IIB (Max) (pA)
Io (Typ) (mA)
CMRR (Typ) (dB)
Additional Features
Operating Temperature Range (C)
Approx. Price (US$)
OPA2604 OPA604
2     1    
9     9    
48     48    
20     20    
25     25    
5     5    
5.25     5.3    
11     11    
8     8    
1000     200    
35     35    
100     100    
FET     FET    
Vos Adj Pin     Vos Adj Pin    
-40 to 85      
1.90 | 1ku     1.05 | 1ku    

Other qualified versions of OPA2604

Version Part Number Definition
Automotive OPA2604-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects

Featured tools and software

WEBENCH® Designer OPA2604

Amplifier Topology
Desired Power Supply Voltage
Positive Supply (Vcc):  V
Negative Supply (Vee):  V
Allowed Power Supply(Vcc-Vee) = 9.0 to 48.0 V
Desired Input and Output Requirements
  Min Max
Vin  V  V
Vout  V  V
Minimum Temperature = -25.0 °C
Maximum Temperature = 85.0 °C