OPA875

ACTIVE

Single-channel, 700-MHz, op amp with 2:1 high-speed multiplexer

Product details

Number of channels 1 Diff gain (%) 0.025 Iout (typ) (A) 0.07 Vs (min) (V) 5 Vs (max) (V) 5 Diff phase (°) 0.025 Iq (typ) (mA) 11 Features Integrated multiplexer Operating temperature range (°C) -40 to 85 Rating Catalog
Number of channels 1 Diff gain (%) 0.025 Iout (typ) (A) 0.07 Vs (min) (V) 5 Vs (max) (V) 5 Diff phase (°) 0.025 Iq (typ) (mA) 11 Features Integrated multiplexer Operating temperature range (°C) -40 to 85 Rating Catalog
SOIC (D) 8 29.4 mm² 4.9 x 6 VSSOP (DGK) 8 14.7 mm² 3 x 4.9
  • 700MHz SMALL-SIGNAL BANDWIDTH
    (AV = +2)
  • 425MHz, 4VPP BANDWIDTH
  • 0.1dB GAIN FLATNESS to 200MHz
  • 4ns CHANNEL SWITCHING TIME
  • LOW SWITCHING GLITCH: 40mVPP
  • 3100V/µs SLEW RATE
  • 0.025%/0.025° DIFFERENTIAL GAIN, PHASE
  • HIGH GAIN ACCURACY: 2.0V/V ±0.4%
  • APPLICATIONS
    • RGB SWITCHING
    • LCD PROJECTOR INPUT SELECT
    • WORKSTATION GRAPHICS
    • ADC INPUT MUX
    • DROP-IN UPGRADE TO LT1675-1

All other trademarks are the property of their respective owners.

  • 700MHz SMALL-SIGNAL BANDWIDTH
    (AV = +2)
  • 425MHz, 4VPP BANDWIDTH
  • 0.1dB GAIN FLATNESS to 200MHz
  • 4ns CHANNEL SWITCHING TIME
  • LOW SWITCHING GLITCH: 40mVPP
  • 3100V/µs SLEW RATE
  • 0.025%/0.025° DIFFERENTIAL GAIN, PHASE
  • HIGH GAIN ACCURACY: 2.0V/V ±0.4%
  • APPLICATIONS
    • RGB SWITCHING
    • LCD PROJECTOR INPUT SELECT
    • WORKSTATION GRAPHICS
    • ADC INPUT MUX
    • DROP-IN UPGRADE TO LT1675-1

All other trademarks are the property of their respective owners.

The OPA875 offers a very wideband, single-channel 2:1 multiplexer in an SO-8 or a small MSOP-8 package. Using only 11mA, the OPA875 provides a gain of +2 video amplifier channel with greater than 425MHz large-signal bandwidth (4VPP). Gain accuracy and switching glitch are improved over earlier solutions using a new input stage switching approach. This technique uses current steering as the input switch while maintaining an overall closed-loop design. With greater than 700MHz small-signal bandwidth at a gain of 2, the OPA875 gives a typical 0.1dB gain flatness to greater than 200MHz.

System power may be reduced using the chip enable feature for the OPA875. Taking the chip enable line high powers down the OPA875 to less than 300µA total supply current. Muxing multiple OPA875 outputs together, then using the chip enable to select which channels are active, increases the number of possible inputs.

Where three channels are required, consider using the OPA3875 for the same level of performance.

The OPA875 offers a very wideband, single-channel 2:1 multiplexer in an SO-8 or a small MSOP-8 package. Using only 11mA, the OPA875 provides a gain of +2 video amplifier channel with greater than 425MHz large-signal bandwidth (4VPP). Gain accuracy and switching glitch are improved over earlier solutions using a new input stage switching approach. This technique uses current steering as the input switch while maintaining an overall closed-loop design. With greater than 700MHz small-signal bandwidth at a gain of 2, the OPA875 gives a typical 0.1dB gain flatness to greater than 200MHz.

System power may be reduced using the chip enable feature for the OPA875. Taking the chip enable line high powers down the OPA875 to less than 300µA total supply current. Muxing multiple OPA875 outputs together, then using the chip enable to select which channels are active, increases the number of possible inputs.

Where three channels are required, consider using the OPA3875 for the same level of performance.

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Technical documentation

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Type Title Date
* Data sheet Single 2:1 High-Speed Video Multiplexer datasheet (Rev. C) 28 Aug 2008
User guide DEM-OPA-MSOP-1B Demonstration Fixture (Rev. C) 28 Apr 2015
User guide DEM-OPA-SO-1D Demonstration Fixture (Rev. A) 03 Apr 2009
User guide DEM-OPA-SO-1E User's Guide (Rev. A) 03 Apr 2009
Application note Noise Analysis for High Speed Op Amps (Rev. A) 17 Jan 2005

Design & development

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

Evaluation board

DEM-OPA-MSOP-1B — DEM-OPA-MSOP-1B Evaluation Module

User guide: PDF
Not available on TI.com
Evaluation board

DEM-OPA-SO-1D — DEM-OPA-SO-1D Evaluation Module

User guide: PDF
Not available on TI.com
Simulation model

OPA875 PSpice Model

SBOC226.ZIP (5 KB) - PSpice Model
Simulation tool

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 (...)
Simulation tool

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 (...)
User guide: PDF
Package Pins Download
SOIC (D) 8 View options
VSSOP (DGK) 8 View options

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