Compact, Dual-Channel, Precision, Programmable Gain Transimpedance Amplifier (PGTIA)

Show More showmore-icon

Compact, Dual channel, Precision Programmable-Gain Transimpedance Amplifier (PGTIA) with 2 external gain settings per channel

Part Details
Part Models 3
1ku List Price Starting From $3.95
  • Small, dual-channel, complete PGTIA and AFE solution
  • Small size package:16-lead LFCSP, 3 mm × 3 mm
  • Integrated switches, 2 external gains per channel
  • Wide input current dynamic range from picoamps to milliamps
  • Excellent DC precision
    • Low offset voltage: ±100 μV maximum, 25°C
    • Low offset voltage drift: ±0.85 μV/°C maximum, −40°C to +125°C
    • Low input bias current: ±9 pA maximum, 25°C
    • Low switch off leakage current : ±90 pA maximum (−40°C to +125°C)
  • New integrated architecture eliminates gain error due to switch resistance
  • Single-supply operation: +2.7 V to +5.5 V (dual-supply operation: ±1.85 V to ±2.75 V)
  • Wide gain bandwidth product: 8.5 MHz
  • Wide operating temperature range: −40°C to +125°C
Additional Details
show more Icon

The ADA4351-2 is a compact, monolithic, dual-channel, precision, programmable gain transimpedance amplifier (PGTIA). The ADA4351-2 is a breakthrough solution for precisely measuring small currents over a wide dynamic range. The precision of the ADA4351-2 over a wide temperature range of −40°C to +125°C enables users to perform one calibration of the end equipment at room temperature, thereby saving test time and cost. The ADA4351-2 integrates two low off leakage current switches per channel, and the gain is programmable using two user-selectable external resistors to provide a flexible, fully functional compact PGTIA solution. Separate analog and digital supplies allow the amplifier of the ADA4351-2 to operate on bipolar supplies, while the integrated logic level shifting allows the digital interface to remain ground referenced. Additionally, with its robust output stage and low noise, the ADA4351-2 can directly drive 16-bit precision analog-to-digital converters (ADCs, such as AD4696), providing a complete analog front-end (AFE) to address the most challenging precision current measurement applications.

The ADA4351-2 is offered in a 3 mm × 3 mm LFCSP, reducing the printed circuit board (PCB) area by up to 70% relative to a discrete design using standalone operational amplifiers (op amps) and switches. Additionally, there is no exposed pad (EPAD) on the back side of the LFCSP, eliminating the need for vias and allowing routing on all layers of the PCB beneath the device to further reduce the board area and to provide the most compact PGTIA and AFE solution.


  • Precision current to voltage (I to V) conversion
  • Programmable gain TIAs
  • Photodetector interface and amplification
  • Optical networking equipment
  • Optical power measurement
  • Instrumentation—spectroscopy and chromatography
  • Precision data acquisition systems (DAQ)
Part Models 3
1ku List Price Starting From $3.95

close icon


Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
  • HTML
  • HTML
  • HTML
  • HTML
  • HTML
  • HTML
Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

reference details image


Evaluating the ADA4351-2 Compact, Dual-Channel, Precision, Programmable Gain Transimpedance Amplifier (PGTIA)



Evaluating the ADA4351-2 Compact, Dual-Channel, Precision, Programmable Gain Transimpedance Amplifier (PGTIA)

Evaluating the ADA4351-2 Compact, Dual-Channel, Precision, Programmable Gain Transimpedance Amplifier (PGTIA)

Features and Benefits

  • Full featured evaluation board for the ADA4351-2, a dual-channel, PGTIA in a 3 mm × 3 mm, 16-lead LFCSP with no exposed pad
  • Enables quick prototyping
  • Provisions for user-defined circuit configuration, including provisions for photodiodes
  • Available edge-mounted SMA connectors and test points for simple connection with test equipment

Product Detail

The EVAL-ADA4351-2EBZ evaluation board is designed to help users evaluate the ADA4351-2, a two-channel programmable gain transimpedance amplifier (PGTIA) that features an integrated gain switching network with two user-defined gain states that can be set via external resistors, offered in a 3 mm × 3mm × 0.78 mm, 16-lead lead frame chip scale package (LFCSP).

The EVAL-ADA4351-2EBZ is a 4-layer printed circuit board (PCB) with dimensions at 2.9 inches x 2.25 inches. Figure 1 and Figure 2 in the user guide shows the top and bottom view of the EVAL-ADA4351-2EBZ, respectively. The EVAL-ADA4351-2EBZ comes populated with the key components that allow users to run and to evaluate the board quickly and with relative ease. That aside, the EVAL-ADA4351-2EBZ also provides open resistor and capacitor slots on its input and output stages, allowing the user to install components with user-defined values for connections such as a low-pass filter (LPF) or voltage divider.

The EVAL-ADA4351-2EBZ is accessible through Subminiature Version A (SMA) female socket edge mounts that allow users to directly connect test equipment to the inputs and outputs of both channels, as well as the gain switch control pins. The EVAL-ADA4351-2EBZ also comes with an unpopulated photodiode slot on each channel, allowing for quick prototyping.

For full details on the ADA4351-2, see the ADA4351-2 data sheet, which should be consulted in conjunction with the user guide when using the EVAL-ADA4351-2EBZ.

Tools & Simulations

Tools & Simulations 3

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Recently Viewed