ADA4351-2

RECOMMENDED FOR NEW DESIGNS

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

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

Part Models
3
1ku List Price
Starting From $3.95

Part Details

  • 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
ADA4351-2
Compact, Dual-Channel, Precision, Programmable Gain Transimpedance Amplifier (PGTIA)
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Hardware Ecosystem

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Tools & Simulations

SPICE Model 1

Photodiode Circuit Design Wizard

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Evaluation Kits

eval board
EVAL-KW4101Z

Precision Integrating Transimpedance Amplifier KWIK Demo Board

Features and Benefits

  • Enables quick measurement of input current from the photodiode using ADA4351-2.
  • The included LED allows to measure pA in light setting configuration and fA in dark setting configuration.
  • The circuit is enclosed by a black box to reduce the sensitivity to ambient lighting conditions.
  • Plug and play in ADALM2000 learning module

Product Details

The EVAL-KW4101Z is a know-how with integrated knowledge (KWIK) demonstration board designed for evaluating current through a precision integrating transimpedance amplifier (TIA). It can measure femto ampere (fA) level of dark current of a TIA as well as pico ampere (pA) level of signal current with the included light-emitting diode (LED).

The EVAL-KW4101Z is mainly an integrator circuit with a 24pF external film capacitor. Connected to the TIA's noninverting input pin is a voltage divider circuit, with R1 and R2 being 1.27kΩ and 1kΩ, respectively. This thereby sets the common-mode input voltage (CMV) to 2.2V. The main circuit involves a sensitive photodiode and is thus confined within a black box enclosure to reduce the effects of ambient lighting conditions. See Figure 1 for the schematic diagram of the ADA4351-2 configured as an integrator with an external capacitor, resistor divider at the input, and a single supply of 5V.

Please see the User Guide for the full description.

EVAL-KW4101Z
Precision Integrating Transimpedance Amplifier KWIK Demo Board

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