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High-speed op amps (GBW ≥ 50 MHz)

OPA4820

ACTIVE

Quad, Unity-Gain, Low-Noise, Voltage-Feedback Operational Amplifier

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Data sheet

OPA4820

ACTIVE
Data sheet Order now

Product details

Architecture Voltage FB Number of channels 4 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 5 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 12 GBW (typ) (MHz) 250 BW at Acl (MHz) 650 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 240 Vn at flatband (typ) (nV√Hz) 2.5 Vn at 1 kHz (typ) (nV√Hz) 2.5 Iq per channel (typ) (mA) 5.6 Vos (offset voltage at 25°C) (max) (mV) 0.8 Rail-to-rail No Rating Catalog Operating temperature range (°C) -40 to 85 CMRR (typ) (dB) 85 Input bias current (max) (pA) 20000000 Offset drift (typ) (µV/°C) 4 Iout (typ) (mA) 85 2nd harmonic (dBc) 84 3rd harmonic (dBc) 92 Frequency of harmonic distortion measurement (MHz) 1
Architecture Voltage FB Number of channels 4 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 5 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 12 GBW (typ) (MHz) 250 BW at Acl (MHz) 650 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 240 Vn at flatband (typ) (nV√Hz) 2.5 Vn at 1 kHz (typ) (nV√Hz) 2.5 Iq per channel (typ) (mA) 5.6 Vos (offset voltage at 25°C) (max) (mV) 0.8 Rail-to-rail No Rating Catalog Operating temperature range (°C) -40 to 85 CMRR (typ) (dB) 85 Input bias current (max) (pA) 20000000 Offset drift (typ) (µV/°C) 4 Iout (typ) (mA) 85 2nd harmonic (dBc) 84 3rd harmonic (dBc) 92 Frequency of harmonic distortion measurement (MHz) 1
SOIC (D) 14 51.9 mm² 8.65 x 6 TSSOP (PW) 14 32 mm² 5 x 6.4
  • HIGH BANDWIDTH: 220MHz (G = +2)
  • HIGH OUTPUT CURRENT: ±85mA
  • LOW INPUT NOISE: 2.5nV/Hz
  • LOW SUPPLY CURRENT: 5.7mA/ch
  • FLEXIBLE SUPPLY VOLTAGE:
    ±2V to ±6.3V Dual Supply
    +4V to +12.6V Single Supply
  • EXCELLENT DC ACCURACY:
    • Maximum 25°C Input Offset Voltage = 0.8mV
    • Maximum 25°C Input Offset Current = 500nA
  • APPLICATIONS
    • LOW–COST VIDEO LINE DRIVERS
    • ADC PREAMPS
    • ACTIVE FILTERS
    • LOW–NOISE INTEGRATORS
    • PORTABLE TEST EQUIPMENT
    • OPTICAL CHANNEL AMPLIFIERS
    • LOW–POWER, BASEBAND AMPLIFIERS
    • CCD IMAGING CHANNEL AMPLIFIERS
    • OPA4650 UPGRADE

All trademarks are the property of their respective owners.
  • HIGH BANDWIDTH: 220MHz (G = +2)
  • HIGH OUTPUT CURRENT: ±85mA
  • LOW INPUT NOISE: 2.5nV/Hz
  • LOW SUPPLY CURRENT: 5.7mA/ch
  • FLEXIBLE SUPPLY VOLTAGE:
    ±2V to ±6.3V Dual Supply
    +4V to +12.6V Single Supply
  • EXCELLENT DC ACCURACY:
    • Maximum 25°C Input Offset Voltage = 0.8mV
    • Maximum 25°C Input Offset Current = 500nA
  • APPLICATIONS
    • LOW–COST VIDEO LINE DRIVERS
    • ADC PREAMPS
    • ACTIVE FILTERS
    • LOW–NOISE INTEGRATORS
    • PORTABLE TEST EQUIPMENT
    • OPTICAL CHANNEL AMPLIFIERS
    • LOW–POWER, BASEBAND AMPLIFIERS
    • CCD IMAGING CHANNEL AMPLIFIERS
    • OPA4650 UPGRADE

All trademarks are the property of their respective owners.

The OPA4820 provides a wideband, unity-gain stable, voltage-feedback amplifier with a very low input noise voltage and high output current using a low 5.7mA/ch supply current. At unity-gain, the OPA4820 gives > 600MHz bandwidth with < 1 dB peaking. The OPA4820 complements this high-speed operation with excellent DC precision in a low-power device. A worst-case input offset voltage of ±0.8mV and an offset current of ±500nA give excellent absolute DC precision for pulse amplifier applications.

Minimal input and output voltage swing headroom allow the OPA4820 to operate on a single +5V supply with > 2VPP output swing. While not a rail-to-rail (RR) output, this swing will support most emerging analog-to-digital converter (ADC) input ranges with lower power and noise than typical RR output op amps.

Exceptionally low dG/dP (0.01%/0.03°) supports low-cost composite video line driver applications. Existing designs can use the industry-standard quad pinout SO-14 package while emerging high-density portable applications can use the TSSOP-14.

The OPA4820 provides a wideband, unity-gain stable, voltage-feedback amplifier with a very low input noise voltage and high output current using a low 5.7mA/ch supply current. At unity-gain, the OPA4820 gives > 600MHz bandwidth with < 1 dB peaking. The OPA4820 complements this high-speed operation with excellent DC precision in a low-power device. A worst-case input offset voltage of ±0.8mV and an offset current of ±500nA give excellent absolute DC precision for pulse amplifier applications.

Minimal input and output voltage swing headroom allow the OPA4820 to operate on a single +5V supply with > 2VPP output swing. While not a rail-to-rail (RR) output, this swing will support most emerging analog-to-digital converter (ADC) input ranges with lower power and noise than typical RR output op amps.

Exceptionally low dG/dP (0.01%/0.03°) supports low-cost composite video line driver applications. Existing designs can use the industry-standard quad pinout SO-14 package while emerging high-density portable applications can use the TSSOP-14.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet Quad, Unity-Gain, Low-Noise, Voltage-Feedback Operational Amplifier datasheet (Rev. D) 28 Aug 2008
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017
Application note RLC Filter Design for ADC Interface Applications (Rev. A) 13 May 2015
User guide DEM-OPA-SO-4A User's Guide (Rev. B) 26 Nov 2008
User guide DEM-OPA-TSSOP-4A User's Guide (Rev. C) 12 Aug 2008
Application note ADS5500, OPA695: PC Board Layout for Low Distortion High-Speed ADC Drivers 22 Apr 2004
Application note Measuring Board Parasitics in High-Speed Analog Design 07 Jul 2003

Design & development

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Evaluation board

DEM-OPA-SO-4A — Quad op-amp SO-14 generic evaluation module

User guide: PDF
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Evaluation board

DEM-OPA-TSSOP-4A — Quad op amp evaluation module for TSSOP-14 package

User guide: PDF
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Simulation model

OPA4820 PSpice Model

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Simulation model

OPA4820 TINA-TI Reference Design

SBOM578.TSC (95 KB) - TINA-TI Reference Design
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Simulation model

OPA4820 TINA-TI Spice Model

SBOM577.ZIP (4 KB) - TINA-TI Spice Model
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Calculation tool

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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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SOIC (D) 14 Ultra Librarian
TSSOP (PW) 14 Ultra Librarian
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