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Product details

Parameters

Number of channels (#) 1 Total supply voltage (Min) (+5V=5, +/-5V=10) 5 Total supply voltage (Max) (+5V=5, +/-5V=10) 36 GBW (Typ) (MHz) 11 Slew rate (Typ) (V/us) 20 Rail-to-rail In to V-, Out Vos (offset voltage @ 25 C) (Max) (mV) 3.5 Iq per channel (Typ) (mA) 1.8 Vn at 1 kHz (Typ) (nV/rtHz) 5.1 Features Burr-Brown™ Audio, Premium Sound THD + N @ 1 kHz (Typ) (%) 0.00005 Rating Catalog Operating temperature range (C) -40 to 85 Output current (Typ) (mA) 30 Architecture FET CMRR (Typ) (dB) 126 Input bias current (Max) (pA) 20 open-in-new Find other Audio op amps

Package | Pins | Size

SOIC (D) 8 19 mm² 4.9 x 3.9 VSSOP (DGK) 8 15 mm² 3 x 4.9 open-in-new Find other Audio op amps

Features

  • Superior Sound Quality
  • True JFET Input Operational Amplifier
    With Low Input Bias Current
  • Low Noise: 5.1 nV/√Hz at 1 kHz
  • Ultralow Distortion: 0.00005% at 1 kHz
  • High Slew Rate: 20 V/µs
  • Unity Gain Stable
  • No Phase Reversal
  • Low Quiescent Current:
    1.8 mA per Channel
  • Rail-to-rail Output
  • Wide Supply Range: ±2.25 V to ±18 V
  • Single, Dual, and Quad Versions Available
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Description

The OPA1641 (single), OPA1642 (dual), and OPA1644 (quad) series are JFET-input, ultralow distortion, low-noise operational amplifiers fully specified for audio applications.

The OPA1641, OPA1642, and OPA1644 rail-to-rail output swing allows increased headroom, making these devices ideal for use in any audio circuit. Features include 5.1-nV/√Hz noise, low THD+N (0.00005%), a low input bias current of 2 pA, and low quiescent current of 1.8 mA per channel.

These devices operate over a very wide supply voltage range of ±2.25 V to ±18 V. The OPA1641, OPA1642, and OPA1644 series of operational amplifiers are unity-gain stable and provide excellent dynamic behavior over a wide range of load conditions.

The dual and quad versions feature completely independent circuitry for lowest crosstalk and freedom from interactions between channels, even when overdriven or overloaded.

The OPA1641, OPA1642, and OPA1644 are specified from –40°C to +85°C.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 8
Type Title Date
* Datasheet OPA164x SoundPlus™ High-Performance, JFET-Input Audio Operational Amplifiers datasheet (Rev. D) Apr. 04, 2016
Technical articles Get started with smart home audio design May 09, 2019
Technical articles No headroom, no problem: buffering and filtering an audio signal chain in low-voltage systems Apr. 11, 2019
Application notes MUX-friendly precision operational amplifiers (Rev. A) Feb. 11, 2019
Technical articles Forget the tiny homes craze – Have you heard about tiny inductors for automotive Class-D amplifiers? Oct. 12, 2017
White papers The Signal e-book: A compendium of blog posts on op amp design topics Mar. 28, 2017
Technical articles Amp up your cans: Is your op amp stable? (Part 2) Jan. 22, 2016
Application notes Compensate Transimpedance Amplifiers Intuitively (Rev. A) Mar. 30, 2005

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Design tools & simulation

SIMULATION MODELS Download
SBOM407C.ZIP (10 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SBOM408C.TSC (1784 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SBOM627B.ZIP (14 KB) - PSpice Model
SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SIMULATION TOOLS Download
SPICE-based analog simulation program
TINA-TI 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 (...)
document-generic User guide
CALCULATION TOOLS Download
Analog engineer's calculator
ANALOG-ENGINEER-CALC — 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 op-amp gain with feedback (...)
Features
  • Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
    • Noise calculations
    • Common unit translation
  • Solves common amplifier circuit design problems
    • Gain selections using standard resistors
    • Filter configurations
    • Total noise for common amplifier configurations
  • (...)

CAD/CAE symbols

Package Pins Download
SOIC (D) 8 View options
VSSOP (DGK) 8 View options

Ordering & quality

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