Product details


Number of channels (#) 2 GBW (Typ) (MHz) 900 Total supply voltage (Max) (+5V=5, +/-5V=10) 5.5 Total supply voltage (Min) (+5V=5, +/-5V=10) 3.3 Vos (offset voltage @ 25 C) (Max) (mV) 8 Rail-to-rail No Features Shutdown BW @ Acl (MHz) 1800 Operating temperature range (C) -55 to 125 open-in-new Find other Transimpedance amplifiers

Package | Pins | Size

WQFN (RTW) 24 16 mm² 4 x 4 open-in-new Find other Transimpedance amplifiers


  • Gain Bandwidth Product: 900 MHz
  • Internal Switches for Programmable Gain
  • High Impedance FET Inputs
  • Input Voltage Noise 2.5 nV/√Hz
  • Slew Rate: 350 V/µs
  • Supply Voltage Range: 3.3 V to 5.25 V
  • Quiescent Current: 21 mA/channel
  • Power Down Mode: IQ < 75µA
  • Temperature Range: -55 °C to 125 °C
  • Supports Defense, Aerospace, and Medical Applications
    • Controlled Baseline
    • One Assembly and Test Site
    • One Fabrication Site
    • Extended Product Life Cycle
    • Extended Product-Change Notification
    • Product Traceability

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The OPA3S2859-EP is a wideband, low-noise programmable gain amplifier with CMOS inputs for wideband transimpedance and voltage amplifier applications. When the device is configured as a transimpedence amplifier (TIA), the 0.9-GHz gain bandwidth product (GBWP) enables high closed-loop bandwidths in low-capacitance photodiode (PD) applications.

The three internal switched feedback paths along with an optional parallel non-switched feedback path allows for up to four selectable gain configurations. The internal switches minimize parasitic contributions to increase performance compared to systems that use discrete external switches. Each switch is optimized for feedback resistor values ranging from < 1 kΩ to  > 100 kΩ for wide dynamic range applications. The selected switch path is controlled for both channels using a  2-wire parallel interface. For each channel selected, the gain path can also be held constant by exerting the latch pin, which subsequently disables switch control for the selected channel and prevents the channel from changing gain.

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OPA859 ACTIVE 1.8 GHz Unity-Gain Bandwidth, 3.3 nV/√Hz, FET Input Amplifier A single-channel amplifier that has a similar FET input and 900-MHz bandwidth, but without integrated switches for configurable gain options.
NEW OPA859-Q1 ACTIVE Automotive 1.8-GHz unity-gain bandwidth, 3.3-nV/√Hz, FET input amplifier An automotive Q100 qualified single-channel amplifier that has a similar FET input and 900-MHz bandwidth, but without integrated switches for configurable gain.

Technical documentation

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Type Title Date
* Data sheet Enhanced Product, Dual-Channel, 900-MHz, 2.5-nV/√Hz, Programmable Gain Transimp datasheet (Rev. A) Apr. 22, 2021
Technical article What you need to know about transimpedance amplifiers – part 1 May 06, 2016

Design & development

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Hardware development

document-generic User guide
The OPA3S2859RTWEVM evaluation module (EVM) is designed to easily demonstrate the functionality and versatility of the amplifier. The EVM can be configured for single or split supplies and footprints for SMA connectors on all analog inputs and outputs. The layout is optimized to reduce (...)
  • Configurable for single or split supplies
  • Input connections to use integrated feedback switches or connect directly to amplifiers input
  • Layout configured to minimize parasitic coupling
  • Optional jumpers or RF connectors for control signals

Design tools & simulation

SBOMBM8.TSC (32 KB) - TINA-TI Reference Design
SBOMBN0.ZIP (139 KB) - PSpice Model
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 (...)
  • 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
  • (...)
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

CAD/CAE symbols

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WQFN (RTW) 24 View options

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