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INA1620

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High-fidelity audio operational amplifier with integrated thin-film resistors and EMI filtering

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Data sheet

INA1620

ACTIVE
Data sheet Order now

Product details

Number of channels 2 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 36 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 4 Vos (offset voltage at 25°C) (max) (mV) 1 Offset drift (typ) (µV/°C) 0.5 Input bias current (max) (pA) 2000000 GBW (typ) (MHz) 32 Features Burr-Brown™ Audio, High Cload Drive, Premium Sound, Shutdown, Small Size Slew rate (typ) (V/µs) 10 Rail-to-rail No Iq per channel (typ) (mA) 2.6 Vn at 1 kHz (typ) (nV√Hz) 2.8 CMRR (typ) (dB) 127 Rating Catalog Operating temperature range (°C) -40 to 125 Iout (typ) (A) 0.145 Architecture Bipolar Input common mode headroom (to negative supply) (typ) (V) 1.5 Input common mode headroom (to positive supply) (typ) (V) -1 Output swing headroom (to negative supply) (typ) (V) 0.8 Output swing headroom (to positive supply) (typ) (V) -0.8 THD + N at 1 kHz (typ) (%) 0.000025
Number of channels 2 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 36 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 4 Vos (offset voltage at 25°C) (max) (mV) 1 Offset drift (typ) (µV/°C) 0.5 Input bias current (max) (pA) 2000000 GBW (typ) (MHz) 32 Features Burr-Brown™ Audio, High Cload Drive, Premium Sound, Shutdown, Small Size Slew rate (typ) (V/µs) 10 Rail-to-rail No Iq per channel (typ) (mA) 2.6 Vn at 1 kHz (typ) (nV√Hz) 2.8 CMRR (typ) (dB) 127 Rating Catalog Operating temperature range (°C) -40 to 125 Iout (typ) (A) 0.145 Architecture Bipolar Input common mode headroom (to negative supply) (typ) (V) 1.5 Input common mode headroom (to positive supply) (typ) (V) -1 Output swing headroom (to negative supply) (typ) (V) 0.8 Output swing headroom (to positive supply) (typ) (V) -0.8 THD + N at 1 kHz (typ) (%) 0.000025
WQFN (RTW) 24 16 mm² (4 mm × 4 mm)
  • High-Quality Thin-Film Resistors
    Matched to 0.004% (Typical)
  • Integrated EMI Filters
  • Ultra-low Noise: 2.8 nV/√Hz at 1 kHz
  • Ultra-low Total Harmonic Distortion + Noise:
    –119 dB THD+N (142 mW/Ch Into 32 Ω/Ch)
  • Wide Gain Bandwidth Product:
    32 MHz (G = +1000)
  • High Slew Rate: 10 V/µs
  • High Capacitive-Load Drive Capability: > 600 pF
  • High Open-Loop Gain: 136 dB (600-Ω Load)
  • Low Quiescent Current: 2.6 mA per Channel
  • Low-Power Shutdown Mode With Reduced Pop-and-Click Noise: 5 µA per Channel
  • Short-Circuit Protection
  • Wide Supply Range: ±2 V to ±18 V
  • Available in Small 24-pin WQFN Package
  • High-Quality Thin-Film Resistors
    Matched to 0.004% (Typical)
  • Integrated EMI Filters
  • Ultra-low Noise: 2.8 nV/√Hz at 1 kHz
  • Ultra-low Total Harmonic Distortion + Noise:
    –119 dB THD+N (142 mW/Ch Into 32 Ω/Ch)
  • Wide Gain Bandwidth Product:
    32 MHz (G = +1000)
  • High Slew Rate: 10 V/µs
  • High Capacitive-Load Drive Capability: > 600 pF
  • High Open-Loop Gain: 136 dB (600-Ω Load)
  • Low Quiescent Current: 2.6 mA per Channel
  • Low-Power Shutdown Mode With Reduced Pop-and-Click Noise: 5 µA per Channel
  • Short-Circuit Protection
  • Wide Supply Range: ±2 V to ±18 V
  • Available in Small 24-pin WQFN Package

The INA1620 integrates 4 precision-matched thin-film resistor pairs and EMI filtering on-chip with a low-distortion, high output current, dual audio operational amplifier. The amplifier achieves a very low,
2.8-nV/√Hz noise density with an ultra-low THD+N of –119.2 dB at 1 kHz and drives a 32-Ω load at 150-mW output power. The integrated thin-film resistors are matched to within 0.004% and can be used to create a large number of very high-performance audio circuits.

The INA1620 operates over a very wide supply range of ±2 V to ±18 V on only 2.6 mA of supply current per channel. The INA1620 also has a shutdown mode, allowing the amplifiers to be switched from normal operation to a standby current that is typically less than 5 µA. Shutdown mode is specifically designed to eliminate click-and-pop noise when transitioning into or out of shutdown mode.

The INA1620 has a unique internal layout for lowest crosstalk, and freedom from interactions between channels, even when overdriven or overloaded. This device is specified from –40°C to +125°C.

The INA1620 integrates 4 precision-matched thin-film resistor pairs and EMI filtering on-chip with a low-distortion, high output current, dual audio operational amplifier. The amplifier achieves a very low,
2.8-nV/√Hz noise density with an ultra-low THD+N of –119.2 dB at 1 kHz and drives a 32-Ω load at 150-mW output power. The integrated thin-film resistors are matched to within 0.004% and can be used to create a large number of very high-performance audio circuits.

The INA1620 operates over a very wide supply range of ±2 V to ±18 V on only 2.6 mA of supply current per channel. The INA1620 also has a shutdown mode, allowing the amplifiers to be switched from normal operation to a standby current that is typically less than 5 µA. Shutdown mode is specifically designed to eliminate click-and-pop noise when transitioning into or out of shutdown mode.

The INA1620 has a unique internal layout for lowest crosstalk, and freedom from interactions between channels, even when overdriven or overloaded. This device is specified from –40°C to +125°C.
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Technical documentation

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* Data sheet INA1620 High-Fidelity Audio Operational Amplifier With Integrated Thin-Film Resistors and EMI Filters datasheet (Rev. B) PDF | HTML Jul 11, 2018
Application note How to Measure Total Harmonic Distortion of an Op-Amp and THD + N Fundamentals PDF | HTML Nov 9, 2023
Application note Analysis of Improved Howland Current Pump Configurations (Rev. A) PDF | HTML Feb 9, 2023
Application note Importance of Input Bias Current Return Paths in Instrumentation Amplifier Apps PDF | HTML Jul 27, 2021
Application note Parallel Amplifiers for Higher Output Power: An Improved Howland Pump Approach PDF | HTML Jul 11, 2021
Application brief Understanding Op Amp Noise in Audio Circuits PDF | HTML Jun 14, 2021
Application brief Parallel INA1620 Headphone Amplifiers for Higher Output Power Apr 25, 2019
Application brief On-Chip Thin Film Resistors Enable High-Performance Audio Circuitry Jun 19, 2018

Design & development

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

Evaluation board

INA1620EVM — INA1620 Audio Operational Amplifier Evaluation Module

The INA1620EVM is a hardware platform for evaluating the INA1620 audio operational amplifier. Each channel of the INA1620 is configured as a difference amplifier, allowing easy connection to an audio analyzer or audio DAC, and outputs a single-ended signal. The INA1620EVM includes a headphone (...)
User guide: PDF
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Simulation model

INA1620 PSpice Model (Rev. B)

SBOMAL4B.ZIP (22 KB) - PSpice model
Supported products & hardware
Simulation model

INA1620 TINA-TI Reference Design (Rev. A)

SBOMAL5A.TSC (360 KB) - TINA-TI reference design
Supported products & hardware
Simulation model

INA1620 TINA-TI Spice Model (Rev. A)

SBOMAL6A.ZIP (10 KB) - TINA-TI Spice model
Supported products & hardware
Calculation tool

ANALOG-ENGINEER-CALC — PC software 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 (...)

Supported products & hardware
Calculation tool

OPAMP-NOISECALC — Noise Calculator

This folder contains three tools to help in understandning and managing noise in cicuits. The included tools are:

  • A noise generator tool - This is a Lab View 4-Run Time executable that generates Gaussian white noise, uniform white noise, 1/f noise, short noise, and 60Hz line noise. Temporal data, (...)
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Package Pins CAD symbols, footprints & 3D models
WQFN (RTW) 24 Ultra Librarian
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