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OPA604

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FET-Input, Audio Operational Amplifier

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Data sheet

OPA604

ACTIVE
Data sheet Order now

Product details

Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 48 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 9 Rail-to-rail No GBW (typ) (MHz) 20 Slew rate (typ) (V/µs) 25 Vos (offset voltage at 25°C) (max) (mV) 5 Iq per channel (typ) (mA) 5.3 Vn at 1 kHz (typ) (nV√Hz) 11 Rating Catalog Operating temperature range (°C) -40 to 85 Offset drift (typ) (µV/°C) 8 Features Burr-Brown™ Audio Input bias current (max) (pA) 200 CMRR (typ) (dB) 100 Iout (typ) (A) 0.035 Architecture FET Input common mode headroom (to negative supply) (typ) (V) 2 Input common mode headroom (to positive supply) (typ) (V) -2 Output swing headroom (to negative supply) (typ) (V) 2 Output swing headroom (to positive supply) (typ) (V) -2
Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 48 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 9 Rail-to-rail No GBW (typ) (MHz) 20 Slew rate (typ) (V/µs) 25 Vos (offset voltage at 25°C) (max) (mV) 5 Iq per channel (typ) (mA) 5.3 Vn at 1 kHz (typ) (nV√Hz) 11 Rating Catalog Operating temperature range (°C) -40 to 85 Offset drift (typ) (µV/°C) 8 Features Burr-Brown™ Audio Input bias current (max) (pA) 200 CMRR (typ) (dB) 100 Iout (typ) (A) 0.035 Architecture FET Input common mode headroom (to negative supply) (typ) (V) 2 Input common mode headroom (to positive supply) (typ) (V) -2 Output swing headroom (to negative supply) (typ) (V) 2 Output swing headroom (to positive supply) (typ) (V) -2
SOIC (D) 8 29.4 mm² 4.9 x 6
  • LOW DISTORTION: 0.0003% at 1kHz
  • LOW NOISE: 10nV/Hz
  • HIGH SLEW RATE: 25V/µs
  • WIDE GAIN-BANDWIDTH: 20MHz
  • UNITY-GAIN STABLE
  • WIDE SUPPLY RANGE: VS = ±4.5 to ±24V
  • DRIVES 600 LOAD
  • DUAL VERSION AVAILABLE (OPA2604)
  • APPLICATIONS
    • PROFESSIONAL AUDIO EQUIPMENT
    • PCM DAC I/V CONVERTERS
    • SPECTRAL ANALYSIS EQUIPMENT
    • ACTIVE FILTERS
    • TRANSDUCER AMPLIFIERS
    • DATA ACQUISITION

All trademarks are the property of their respective owners.
  • LOW DISTORTION: 0.0003% at 1kHz
  • LOW NOISE: 10nV/Hz
  • HIGH SLEW RATE: 25V/µs
  • WIDE GAIN-BANDWIDTH: 20MHz
  • UNITY-GAIN STABLE
  • WIDE SUPPLY RANGE: VS = ±4.5 to ±24V
  • DRIVES 600 LOAD
  • DUAL VERSION AVAILABLE (OPA2604)
  • APPLICATIONS
    • PROFESSIONAL AUDIO EQUIPMENT
    • PCM DAC I/V CONVERTERS
    • SPECTRAL ANALYSIS EQUIPMENT
    • ACTIVE FILTERS
    • TRANSDUCER AMPLIFIERS
    • DATA ACQUISITION

All trademarks are the property of their respective owners.

The OPA604 is a FET-input operational amplifier designed for enhanced AC performance. Very low distortion, low noise and wide bandwidth provide superior performance in high quality audio and other applications requiring excellent dynamic performance.

New circuit techniques and special laser trimming of dynamic circuit performance yield very low harmonic distortion. The result is an op amp with exceptional sound quality. The low-noise FET input of the OPA604 provides wide dynamic range, even with high source impedance. Offset voltage is laser-trimmed to minimize the need for interstage coupling capacitors.

The OPA604 is available in 8-pin plastic mini-DIP and SO-8 surface-mount packages, specified for the –25°C to +85°C temperature range.

The OPA604 is a FET-input operational amplifier designed for enhanced AC performance. Very low distortion, low noise and wide bandwidth provide superior performance in high quality audio and other applications requiring excellent dynamic performance.

New circuit techniques and special laser trimming of dynamic circuit performance yield very low harmonic distortion. The result is an op amp with exceptional sound quality. The low-noise FET input of the OPA604 provides wide dynamic range, even with high source impedance. Offset voltage is laser-trimmed to minimize the need for interstage coupling capacitors.

The OPA604 is available in 8-pin plastic mini-DIP and SO-8 surface-mount packages, specified for the –25°C to +85°C temperature range.
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Technical documentation

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Type Title Date
* Data sheet FET-Input, Low Distortion Operational Amplifier datasheet (Rev. A) 09 Sep 2003
Technical article No headroom, no problem: buffering and filtering an audio signal chain in low-voltage systems 11 Apr 2019
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017
Technical article Amp up your cans: Is your op amp stable? (Part 2) 22 Jan 2016
Technical article Stress-induced outbursts: Microphonics in ceramic capacitors (Part 2) 23 Dec 2014
Technical article Stress-induced outbursts: Microphonics in ceramic capacitors (Part 1) 19 Dec 2014
Application note Noise Analysis for High Speed Op Amps (Rev. A) 17 Jan 2005

Design & development

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Simulation model

OPA604 PSpice Model (Rev. A)

SBOM093A.ZIP (37 KB) - PSpice Model
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Simulation model

OPA604 TINA-TI Reference Design (Rev. B)

SBOC116B.TSC (97 KB) - TINA-TI Reference Design
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Simulation model

OPA604 TINA-TI Spice Model (Rev. A)

SBOC218A.ZIP (3 KB) - TINA-TI Spice Model
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Calculation tool

ANALOG-ENGINEER-CALC — Analog engineer's calculator

The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Simulation tool

TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
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