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Product details

Parameters

Architecture Voltage FB Number of channels (#) 1 Total supply voltage (Min) (+5V=5, +/-5V=10) 10 Total supply voltage (Max) (+5V=5, +/-5V=10) 12 GBW (Typ) (MHz) 3900 BW @ Acl (MHz) 600 Acl, min spec gain (V/V) 12 Slew rate (Typ) (V/us) 950 Vn at flatband (Typ) (nV/rtHz) 0.85 Vn at 1 kHz (Typ) (nV/rtHz) 0.85 Iq per channel (Typ) (mA) 18.1 Vos (offset voltage @ 25 C) (Max) (mV) 0.5 Rail-to-rail No Features Shutdown, Decompensated Rating Catalog Operating temperature range (C) -40 to 85 CMRR (Typ) (dB) 110 Input bias current (Max) (pA) 39000000 Offset drift (Typ) (uV/C) 1.5 Output current (Typ) (mA) 75 2nd harmonic (dBc) 74 3rd harmonic (dBc) 100 @ MHz 5 open-in-new Find other High-speed op amps (GBW>=50MHz)

Package | Pins | Size

SOIC (D) 8 19 mm² 3.91 x 4.9 SOT-23 (DBV) 6 5 mm² 2.9 x 1.6 open-in-new Find other High-speed op amps (GBW>=50MHz)

Features

  • HIGH GAIN BANDWIDTH: 3.9GHz
  • LOW INPUT VOLTAGE NOISE: 0.85nV/√Hz
  • VERY LOW DISTORTION: –105dBc (5MHz)
  • HIGH SLEW RATE: 950V/µs
  • HIGH DC ACCURACY: VIO < ±100µV
  • LOW SUPPLY CURRENT: 18.1mA
  • LOW SHUTDOWN POWER: 2mW
  • STABLE FOR GAINS 12
  • APPLICATIONS
    • HIGH DYNAMIC RANGE ADC PREAMPS
    • LOW NOISE, WIDEBAND, TRANSIMPEDANCE AMPLIFIERS
    • WIDEBAND, HIGH GAIN AMPLIFIERS
    • LOW NOISE DIFFERENTIAL RECEIVERS
    • ULTRASOUND CHANNEL AMPLIFIERS
    • IMPROVED UPGRADE FOR THE OPA687, CLC425, AND LMH6642

All trademarks are the property of their respective owners.

open-in-new Find other High-speed op amps (GBW>=50MHz)

Description

The OPA847 combines very high gain bandwidth and large signal performance with an ultra-low input noise voltage (0.85nV/√Hz) while using only 18mA supply current. Where power saving is critical, the OPA847 also includes an optional power shutdown pin that, when pulled low, disables the amplifier and decreases the supply current to < 1% of the powered-up value. This optional feature may be left disconnected to ensure normal amplifier operation when no power-down is required.

The combination of very low input voltage and current noise, along with a 3.9GHz gain bandwidth product, make the OPA847 an ideal amplifier for wideband transimpedance applications. As a voltage gain stage, the OPA847 is optimized for a flat frequency response at a gain of +20V/V and is stable down to gains as low as +12V/V. New external compensation techniques allow the OPA847 to be used at any inverting gain with excellent frequency response control. Using this technique in a differential Analog-to-Digital Converter (ADC) interface application, shown below, can deliver one of the highest dynamic range interfaces available.

open-in-new Find other High-speed op amps (GBW>=50MHz)
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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet Wideband, Ultra Low-Noise, Voltage-Feedback Operational Amplifier with Shutdown datasheet (Rev. E) Dec. 30, 2008
Technical articles How to reduce distortion in high-voltage, high-frequency signal generation for AWGs Oct. 30, 2018
Technical articles What are the advantages of using JFET-input amplifiers in high-speed applications? Jun. 18, 2018
Technical articles Unique active mux capability combines buffer and switch into one solution Oct. 10, 2017
White papers The Signal e-book: A compendium of blog posts on op amp design topics Mar. 28, 2017
Technical articles How to minimize filter loss when you drive an ADC Oct. 20, 2016
Application notes RLC Filter Design for ADC Interface Applications (Rev. A) May 13, 2015
User guides DEM-OPA-SO-1A User's Guide (Rev. B) Apr. 12, 2012
User guides DEM-OPA-SO-1B User's Guide (Rev. D) Apr. 12, 2012
User guides DEM-OPA-SOT-1A User's Guide (Rev. B) Apr. 12, 2012
User guides DEM-OPA-SO-1B User's Guide (Rev. C) Apr. 22, 2011
Application notes Transimpedance Considerations for High-Speed Operational Amplifiers Nov. 22, 2009
User guides Voltage-Controlled Amplifier Evaluation Kit Aug. 25, 2008
User guides DEM-OPA-SOT-1B User's Guide (Rev. B) Apr. 12, 2006
User guides DEM-OPA-SOT-1A User's Guide (Rev. A) Mar. 22, 2006
User guides DEM-OPA-SO-1A User's Guide (Rev. A) Mar. 16, 2006
Application notes Low-power, high-intercept interface to the ADS5424, 105-MSPS converter Oct. 10, 2005
Application notes Using a decompensated op amp for improved performance Mar. 11, 2005
Application notes Noise Analysis for High Speed Op Amps (Rev. A) Jan. 17, 2005
Application notes ADS5500, OPA695: PC Board Layout for Low Distortion High-Speed ADC Drivers Apr. 22, 2004
Application notes Measuring Board Parasitics in High-Speed Analog Design Jul. 07, 2003

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
5
Description

The DEM-OPA-SO-1B demonstration fixture in the non-inverting configuration helps designers evaluate the operation and performance of TI's single high speed, wideband operational amplifiers. This unpopulated PC board is compatible with products offered in the 8-lead SOIC (D) package.

For more (...)

EVALUATION BOARDS Download
document-generic User guide
5
Description

The DEM-OPA-SOT-1B demonstration fixture in the non-inverting configuration helps designers evaluate the operation and performance of TI's single high speed, wideband operational amplifiers. This unpopulated PC board is compatible with products offered in the SOT23 (DBV) package.

Design tools & simulation

SIMULATION MODELS Download
SBOC037.ZIP (1 KB) - PSpice Model
SIMULATION MODELS Download
SBOC037A.ZIP (2 KB) - PSpice Model
SIMULATION MODELS Download
SBOC098C.TSC (54 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SBOJ018.ZIP (54 KB) - Spice Model
SIMULATION MODELS Download
SBOM180A.ZIP (6 KB) - TINA-TI Spice 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
  • (...)
CALCULATION TOOLS Download
Voltage Divider Determines A Set of Resistors for a Voltage Divider
VOLT-DIVIDER-CALC 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. This calculator can also be used to design non-inverting attentuation circuits.

(...)

Reference designs

REFERENCE DESIGNS Download
Noise Measurement Post-Amp for Oscilloscope or Spectrum Analyzer
TIPD147 In some cases a scope or spectrum analyzer does not have the range required to measure very small noise levels.  This noise measurement post-amp boosts the output noise of the device under test (DUT) to allow for measurement with standard test equipment. The key requirements of this circuit is (...)
document-generic Schematic document-generic User guide
Design files

CAD/CAE symbols

Package Pins Download
SOIC (D) 8 View options
SOT-23 (DBV) 6 View options

Ordering & quality

Support & training

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