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High-speed op amps (GBW ≥ 50 MHz)

THS4021

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2-GHz, single-channel ultra-low-noise voltage-feedback amplifier

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OPA892 ACTIVE 2-GHz 10-V/V stable 0.95-nV√Hz operational amplifier with ultra-low total harmonic distortion (THD) Wider supply (36V), lower noise (0.95 nV/Hz), higher precision (1mV) and improved THD+N (-114dBc)

THS4021

ACTIVE
Data sheet Order now

Product details

Architecture Voltage FB Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 9 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 32 GBW (typ) (MHz) 2000 BW at Acl (MHz) 290 Acl, min spec gain (V/V) 10 Slew rate (typ) (V/µs) 470 Vn at flatband (typ) (nV√Hz) 1.2 Vn at 1 kHz (typ) (nV√Hz) 1.2 Iq per channel (typ) (mA) 7.5 Vos (offset voltage at 25°C) (max) (mV) 2 Rail-to-rail No Features Decompensated Rating Catalog Operating temperature range (°C) -40 to 85 CMRR (typ) (dB) 95 Input bias current (max) (pA) 20000000 Offset drift (typ) (µV/°C) 2 Iout (typ) (mA) 200 2nd harmonic (dBc) 77 3rd harmonic (dBc) 100 Frequency of harmonic distortion measurement (MHz) 1
Architecture Voltage FB Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 9 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 32 GBW (typ) (MHz) 2000 BW at Acl (MHz) 290 Acl, min spec gain (V/V) 10 Slew rate (typ) (V/µs) 470 Vn at flatband (typ) (nV√Hz) 1.2 Vn at 1 kHz (typ) (nV√Hz) 1.2 Iq per channel (typ) (mA) 7.5 Vos (offset voltage at 25°C) (max) (mV) 2 Rail-to-rail No Features Decompensated Rating Catalog Operating temperature range (°C) -40 to 85 CMRR (typ) (dB) 95 Input bias current (max) (pA) 20000000 Offset drift (typ) (µV/°C) 2 Iout (typ) (mA) 200 2nd harmonic (dBc) 77 3rd harmonic (dBc) 100 Frequency of harmonic distortion measurement (MHz) 1
HVSSOP (DGN) 8 14.7 mm² 3 x 4.9 SOIC (D) 8 29.4 mm² 4.9 x 6
  • Ultra-low 1.2nV/√Hz voltage noise
  • High speed:
    • 2GHz gain-bandwidth product
    • 470V/µs slew rate
    • 30ns settling time (0.1%)
  • Stable at gains ≥10V/V
  • Output drive, IO = 200mA (typical)
  • Very low distortion:
    • THD = –68dBc (f = 1MHz, RL = 150Ω)
  • Wide range of power supplies:
    • VCC = ±4.5V to ±16V
  • Offset nulling pins on the THS4021
  • Ultra-low 1.2nV/√Hz voltage noise
  • High speed:
    • 2GHz gain-bandwidth product
    • 470V/µs slew rate
    • 30ns settling time (0.1%)
  • Stable at gains ≥10V/V
  • Output drive, IO = 200mA (typical)
  • Very low distortion:
    • THD = –68dBc (f = 1MHz, RL = 150Ω)
  • Wide range of power supplies:
    • VCC = ±4.5V to ±16V
  • Offset nulling pins on the THS4021

The THS4021 and THS4022 (THS402x) are ultra-low voltage noise, high-speed voltage-feedback amplifiers that are an excellent choice for applications requiring low voltage noise, including communication and imaging. The single-amplifier THS4021 and the dual-amplifier THS4022 offer very good ac performance with a 290MHz closed-loop bandwidth, 470V/µs slew rate, and 30ns settling time (0.1%) for a gain of 10V/V. The THS402x are stable at gains of 10V/V or greater and –9V/V or less. These amplifiers have a high drive capability of 200mA and draw only 7.5mA of supply current per amplifier. With a total harmonic distortion (THD) of –68dBc at f = 1MHz, the THS402x are designed for applications requiring low distortion.

The THS4021 and THS4022 (THS402x) are ultra-low voltage noise, high-speed voltage-feedback amplifiers that are an excellent choice for applications requiring low voltage noise, including communication and imaging. The single-amplifier THS4021 and the dual-amplifier THS4022 offer very good ac performance with a 290MHz closed-loop bandwidth, 470V/µs slew rate, and 30ns settling time (0.1%) for a gain of 10V/V. The THS402x are stable at gains of 10V/V or greater and –9V/V or less. These amplifiers have a high drive capability of 200mA and draw only 7.5mA of supply current per amplifier. With a total harmonic distortion (THD) of –68dBc at f = 1MHz, the THS402x are designed for applications requiring low distortion.
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Technical documentation

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Type Title Date
* Data sheet THS402x 2GHz, 10V/V Stable, Low-Noise, High-Speed Amplifiers datasheet (Rev. F) PDF | HTML 15 Jul 2024
Technical article 3 common questions when designing with high-speed amplifiers PDF | HTML 17 Jul 2020
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017
Analog Design Journal Using a decompensated op amp for improved performance 11 Mar 2005
Application note Noise Analysis for High Speed Op Amps (Rev. A) 17 Jan 2005
Application note Using a Decompensated Operational Amplifier for Improved Performance 30 Mar 2001
User guide THS4021 High-Speed Operational Amplifier Evaluation Module User's Guide 29 Oct 1999

Design & development

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Evaluation board

THS4021EVM — THS4021 evaluation module for 2-GHz, single-channel ultra-low-noise voltage-feedback amplifier

The THS4021 high-speed operational amplifier evaluation module (EVM) is a complete high-speed amplifier circuit. It consists of the THS4021 high-speed, low-power operational amplifier IC, along with a small number of passive parts, mounted on a small circuit boad measuing approximately 1.7 inch by (...)

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THS4021 PSpice Model (Rev. A)

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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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VOLT-DIVIDER-CALC — Voltage divider calculation tool

The voltage divider calculation tool (VOLT-DIVIDER-CALC) quickly determines a set of resistors for a voltage divider. This KnowledgeBase JavaScript utility can be used to find a set of resistors for a voltage divider to achieve the desired output voltage. VOLT-DIVIDER-CALC can also be used to (...)
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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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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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