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Product details

Parameters

Architecture FET / CMOS Input, Voltage FB Number of channels (#) 1 Total supply voltage (Min) (+5V=5, +/-5V=10) 8 Total supply voltage (Max) (+5V=5, +/-5V=10) 12 GBW (Typ) (MHz) 1600 BW @ Acl (MHz) 350 Acl, min spec gain (V/V) 7 Slew rate (Typ) (V/us) 700 Vn at flatband (Typ) (nV/rtHz) 4.8 Vn at 1 kHz (Typ) (nV/rtHz) 7 Iq per channel (Typ) (mA) 14 Vos (offset voltage @ 25 C) (Max) (mV) 1.8 Rail-to-rail No Features Decompensated Rating Catalog Operating temperature range (C) -40 to 85 CMRR (Typ) (dB) 89 Input bias current (Max) (pA) 20 Offset drift (Typ) (uV/C) 2 Output current (Typ) (mA) 70 2nd harmonic (dBc) 74 3rd harmonic (dBc) 106 @ 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) 5 5 mm² 2.9 x 1.6 open-in-new Find other High-speed op amps (GBW>=50MHz)

Features

  • High Gain Bandwidth Product: 1.6 GHz
  • High Bandwidth 275 MHz (G = 10)
  • Slew Rate 700 V/µs (G = 10, 1-V Step)
  • Available in High Grade With Improved DC
    Specifications
  • Operating Temperature Range: –40°C to 85°C
  • Low-Input Offset Voltage: ±250 µV
  • Low-Input Bias Current: 2 pA
  • Low-Input Voltage Noise: 4.8 nV/√Hz
  • High-Output Current: 70 mA
  • Fast Overdrive Recovery
open-in-new Find other High-speed op amps (GBW>=50MHz)

Description

The OPA657 device combines a high-gain bandwidth, low-distortion, voltage-feedback operational amplifier with a low-voltage noise JFET-input stage to offer a very high dynamic range amplifier for high-precision ADC (analog-to-digital converter) driving or wideband transimpedance applications. Photodiode applications see improved noise and bandwidth using this decompensated, high-gain bandwidth amplifier.

Very low level signals can be significantly amplified in a single OPA657 gain stage with exceptional bandwidth and accuracy. Having a high 1.6-GHz gain bandwidth product gives greater than 10-MHz signal bandwidths up to gains of 160 V/V (44 dB). The very low input bias current and capacitance supports this performance even for relatively high source impedances.

Broadband photodetector applications benefit from the low-voltage noise JFET inputs for the OPA657. The JFET input contributes virtually no current noise while for broadband applications, a low voltage noise is also required. The low 4.8 nV/√Hz input voltage noise provides exceptional input sensitivity for higher bandwidth applications. The example shown below gives a total equivalent input noise current of 1.8 pA/√Hz over a 10-MHz bandwidth.

open-in-new Find other High-speed op amps (GBW>=50MHz)
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Same functionality with different pin-out to the compared device.
OPA818 ACTIVE 2.7-GHz, 13-V, decompensated 7-V/V, FET-input operational amplifier This device has lower noise (2.2 nV/rtHz) and higher gain-bandwidth (2.7 GHz) 

Technical documentation

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Type Title Date
* Data sheet OPA657 1.6-GHz, Low-Noise, FET-Input Operational Amplifier datasheet (Rev. F) Aug. 31, 2015
Technical article 3 common questions when designing with high-speed amplifiers Jul. 17, 2020
Technical article How to reduce distortion in high-voltage, high-frequency signal generation for AWGs Oct. 30, 2018
Technical article What are the advantages of using JFET-input amplifiers in high-speed applications? Jun. 19, 2018
Technical article Unique active mux capability combines buffer and switch into one solution Oct. 10, 2017
Application note Transimpedance Amplifiers (TIA): Choosing the Best Amplifier for the job (Rev. A) May 16, 2017
E-book The Signal e-book: A compendium of blog posts on op amp design topics Mar. 28, 2017
User guide DEM-OPA-SO-1A User's Guide (Rev. B) Apr. 12, 2012
User guide DEM-OPA-SO-1B User's Guide (Rev. D) Apr. 12, 2012
User guide DEM-OPA-SOT-1A User's Guide (Rev. B) Apr. 12, 2012
User guide DEM-OPA-SO-1B User's Guide (Rev. C) Apr. 22, 2011
Application note Transimpedance Considerations for High-Speed Operational Amplifiers Nov. 22, 2009
User guide DEM-OPA-SOT-1B User's Guide (Rev. B) Apr. 12, 2006
User guide DEM-OPA-SOT-1A User's Guide (Rev. A) Mar. 22, 2006
User guide DEM-OPA-SO-1A User's Guide (Rev. A) Mar. 16, 2006
Application note Using a decompensated op amp for improved performance Mar. 11, 2005
Application note Designing for low distortion with high-speed op amps Mar. 02, 2005
Application note Noise Analysis for High Speed Op Amps (Rev. A) Jan. 17, 2005
Application note Measuring Board Parasitics in High-Speed Analog Design Jul. 07, 2003
Application note Voltage Feedback vs. Current Feedback Op Amps Nov. 30, 1998

Design & development

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

Hardware development

EVALUATION BOARD Download
document-generic User guide
5
Description

The DEM-OPA-SO-1A demonstration fixture helps designers evaluate the operation and performance of TI's High Speed, Wide Bandwidth Operational Amplifiers. This unpopulated PC board is compatible with products offered in the 8-lead SOIC (D) package.

EVALUATION BOARD Download
document-generic User guide
5
Description

The DEM-OPA-SOT-1A is a demonstration fixture that helps designers evaluate the operation and performance of TI's High Speed, Wide Bandwidth Operational Amplifiers. This unpopulated PC board is compatible with products offered in the SOT(DBV) package.

Design tools & simulation

SIMULATION MODEL Download
SBOC121C.TSC (2056 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SBOM137F.ZIP (355 KB) - PSpice Model
SIMULATION MODEL Download
SBOM196B.ZIP (13 KB) - TINA-TI Spice Model
SIMULATION TOOL 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 TOOL 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 TOOL 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 TOOL 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.

(...)

CAD/CAE symbols

Package Pins Download
SOIC (D) 8 View options
SOT-23 (DBV) 5 View options

Ordering & quality

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  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Support & training

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