Home Amplifiers Operational amplifiers (op amps) High-speed op amps (GBW ≥ 50 MHz)
Home
Amplifiers
Operational amplifiers (op amps)
High-speed op amps (GBW ≥ 50 MHz)

OPA691

ACTIVE

Wideband Current Feedback Operational Amplifier with Disable

Order now
Data sheet

OPA691

ACTIVE
Data sheet Order now

Product details

Architecture Current FB Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 4 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 12 GBW (typ) (MHz) 280 BW at Acl (MHz) 280 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 2100 Vn at flatband (typ) (nV√Hz) 1.7 Vn at 1 kHz (typ) (nV√Hz) 1.7 Iq per channel (typ) (mA) 5.1 Vos (offset voltage at 25°C) (max) (mV) 2.5 Rail-to-rail No Features Shutdown Rating Catalog Operating temperature range (°C) -40 to 85 CMRR (typ) (dB) 56 Input bias current (max) (pA) 35000000 Offset drift (typ) (µV/°C) 20 Iout (typ) (mA) 190 2nd harmonic (dBc) 70 3rd harmonic (dBc) 74 Frequency of harmonic distortion measurement (MHz) 5
Architecture Current FB Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 4 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 12 GBW (typ) (MHz) 280 BW at Acl (MHz) 280 Acl, min spec gain (V/V) 1 Slew rate (typ) (V/µs) 2100 Vn at flatband (typ) (nV√Hz) 1.7 Vn at 1 kHz (typ) (nV√Hz) 1.7 Iq per channel (typ) (mA) 5.1 Vos (offset voltage at 25°C) (max) (mV) 2.5 Rail-to-rail No Features Shutdown Rating Catalog Operating temperature range (°C) -40 to 85 CMRR (typ) (dB) 56 Input bias current (max) (pA) 35000000 Offset drift (typ) (µV/°C) 20 Iout (typ) (mA) 190 2nd harmonic (dBc) 70 3rd harmonic (dBc) 74 Frequency of harmonic distortion measurement (MHz) 5
SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm) SOT-23 (DBV) 6 8.12 mm² (2.9 mm × 2.8 mm)
  • FLEXIBLE SUPPLY RANGE:
        +5V to +12V Single-Supply
        ±2.5V to ±6V Dual-Supply
  • UNITY-GAIN STABLE: 280MHz (G =1)
  • HIGH OUTPUT CURRENT: 190mA
  • OUTPUT VOLTAGE SWING: ±4.0V
  • HIGH SLEW RATE: 2100V/µs
  • LOW dG/d: 0.07%/0.02°
  • LOW SUPPLY CURRENT: 5.1mA
  • LOW DISABLED CURRENT: 150µA
  • WIDEBAND +5V OPERATION: 190MHz (G = +2)
  • APPLICATIONS
    • xDSL LINE DRIVER
    • BROADBAND VIDEO BUFFERS
    • HIGH-SPEED IMAGING CHANNELS
    • PORTABLE INSTRUMENTS
    • ADC BUFFERS
    • ACTIVE FILTERS
    • WIDEBAND INVERTING SUMMING
    • HIGH SFDR IF AMPLIFIER

All trademarks are the property of their respective owners.
  • FLEXIBLE SUPPLY RANGE:
        +5V to +12V Single-Supply
        ±2.5V to ±6V Dual-Supply
  • UNITY-GAIN STABLE: 280MHz (G =1)
  • HIGH OUTPUT CURRENT: 190mA
  • OUTPUT VOLTAGE SWING: ±4.0V
  • HIGH SLEW RATE: 2100V/µs
  • LOW dG/d: 0.07%/0.02°
  • LOW SUPPLY CURRENT: 5.1mA
  • LOW DISABLED CURRENT: 150µA
  • WIDEBAND +5V OPERATION: 190MHz (G = +2)
  • APPLICATIONS
    • xDSL LINE DRIVER
    • BROADBAND VIDEO BUFFERS
    • HIGH-SPEED IMAGING CHANNELS
    • PORTABLE INSTRUMENTS
    • ADC BUFFERS
    • ACTIVE FILTERS
    • WIDEBAND INVERTING SUMMING
    • HIGH SFDR IF AMPLIFIER

All trademarks are the property of their respective owners.

The OPA691 sets a new level of performance for broadband current feedback op amps. Operating on a very low 5.1mA supply current, the OPA691 offers a slew rate and output power normally associated with a much higher supply current. A new output stage architecture delivers a high output current with minimal voltage headroom and crossover distortion. This gives exceptional single-supply operation. Using a single +5V supply, the OPA691 can deliver a 1V to 4V output swing with over 150mA drive current and 190MHz bandwidth. This combination of features makes the OPA691 an ideal RGB line driver or single-supply Analog-to-Digital Converter (ADC) input driver.

The OPA691’s low 5.1mA supply current is precisely trimmed at 25°C. This trim, along with low drift over-temperature, ensures lower maximum supply current than competing products. System power may be further reduced by using the optional disable control pin. Leaving this disable pin open, or holding it HIGH, gives normal operation. If pulled LOW, the OPA691 supply current drops to less than 150µA while the output goes into a high impedance state. This feature may be used for power savings.

The OPA691 sets a new level of performance for broadband current feedback op amps. Operating on a very low 5.1mA supply current, the OPA691 offers a slew rate and output power normally associated with a much higher supply current. A new output stage architecture delivers a high output current with minimal voltage headroom and crossover distortion. This gives exceptional single-supply operation. Using a single +5V supply, the OPA691 can deliver a 1V to 4V output swing with over 150mA drive current and 190MHz bandwidth. This combination of features makes the OPA691 an ideal RGB line driver or single-supply Analog-to-Digital Converter (ADC) input driver.

The OPA691’s low 5.1mA supply current is precisely trimmed at 25°C. This trim, along with low drift over-temperature, ensures lower maximum supply current than competing products. System power may be further reduced by using the optional disable control pin. Leaving this disable pin open, or holding it HIGH, gives normal operation. If pulled LOW, the OPA691 supply current drops to less than 150µA while the output goes into a high impedance state. This feature may be used for power savings.
filter Find other High-speed op amps (GBW ≥ 50 MHz)
Download View video with transcript Video

Similar products you might be interested in

open-in-new Compare alternates
Pin-for-pin with same functionality to the compared device.
OPA695 ACTIVE Ultra-Wideband, Current-Feedback Operational Amplifier with Disable Wider bandwidth (1.7 GHz), faster slew rate (4300 V/µs) and improved harmonic distortion
LMH6703 ACTIVE 1.2 GHz, Low Distortion Op Amp with Shutdown Wider bandwidth (BW) (1800 MHz), slew rate (4200 V/µs) and harmonic distortion 
Same functionality with different pin-out to the compared device.
THS3095 ACTIVE Single, high-voltage low-distortion current-feedback operational amplifier with power down Wider supply voltage (32V), higher slew rate (6,000V/µs) and lower noise (1.1nV/rtHz)

Technical documentation

No results found. Please clear your search and try again.
View all 15
Top documentation Type Title Format options Date
* Data sheet Wideband, Current Feedback Operational Amplifier With Disable datasheet (Rev. D) Jul 2, 2008
Technical article 3 common questions when designing with high-speed amplifiers PDF | HTML Jul 17, 2020
E-book The Signal e-book: A compendium of blog posts on op amp design topics PDF | HTML Mar 28, 2017
Application note RLC Filter Design for ADC Interface Applications (Rev. A) May 13, 2015
User guide DEM-OPA-SO-1A User's Guide (Rev. B) Apr 12, 2012
User guide DEM-OPA-SOT-1A User's Guide (Rev. B) Apr 12, 2012
Application note A Numerical Solution to an Analog Problem Apr 25, 2010
Application note Wireline Data Transmission and Reception Jan 27, 2010
Analog design Journal Expanding the usability of current-feedback amplifiers Feb 28, 2005
Analog design Journal Active filters using current-feedback amplifiers Feb 25, 2005
Application note Noise Analysis for High Speed Op Amps (Rev. A) Jan 17, 2005
Application note Stabilizing Current-Feedback Op Amps While Optimizing Circuit Performance Apr 28, 2004
Application note ADS5500, OPA695: PC Board Layout for Low Distortion High-Speed ADC Drivers Apr 22, 2004
Application note Measuring Board Parasitics in High-Speed Analog Design Jul 7, 2003
Application note Current Feedback Amplifiers: Review, Stability Analysis, and Applications Nov 20, 2000

Design & development

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

Evaluation board

DEM-OPA-SO-1A — Single op-amp evaluation module for SO-8 package

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.

Supported products & hardware
In stock
Limit:
??asset.out-of-stock-ti_en_US??
Not available
Evaluation board

DEM-OPA-SOT-1A — Single operational amplifier evaluation module for SOT-23 5-pin and 6-pin packages

DEM-OPA-SOT-1A is a demonstration board that evaluates the operation and performance of high-speed, wide-bandwidth operational amplifiers. This unpopulated PC board is compatible with products offered in the small-outline transistor (SOT) DBV package.

Supported products & hardware
In stock
Limit:
??asset.out-of-stock-ti_en_US??
Not available
Simulation model

OPA691 PSpice Model (Rev. B)

SBOM151B.ZIP (37 KB) - PSpice model
Supported products & hardware
Simulation model

OPA691 TINA-TI Reference Design (Rev. B)

SBOC240B.TSC (103 KB) - TINA-TI reference design
Supported products & hardware
Simulation model

OPA691 TINA-TI Spice Model (Rev. A)

SBOM303A.ZIP (6 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
Package Pins CAD symbols, footprints & 3D models
SOIC (D) 8 Ultra Librarian
SOT-23 (DBV) 6 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

Ordering & quality

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos