The Analog Devices ADA4350 Analog Front End (AFE) with ADC driver is designed to interface directly with current mode sensors. In voltage input applications, the device interfaces with sensors such as photodetectors and high-output impedance voltage sensors, requiring designers to choose between very precise gain levels to maximize dynamic range, or their output current and detected The parameters are proportional.
The ADA4350 integrates FET input amplifiers, gain switching networks, and ADC drivers into a single IC. Designers can control all functions through a serial peripheral interface (SPI) or parallel control logic. The ADA4350's switching network allows designers to select up to six different externally configurable feedback networks. Using external components of the feedback network, designers can more easily match the system to the required photodetector or sensor capacitance. The design of the switches minimizes sources of error, so they hardly add errors to the signal path. Designers can use output drivers in single-ended or differential mode.
The company said that the ADA4350 has very low noise performance at a low frequency of 90nV / vHz at 10Hz and broadband noise of 5nV / vHz at 100kHz. It is an excellent choice for various photodetectors, sensors and precision data acquisition systems .
