ADA4350

Data Sheet FET Input Analog Front End with ADC Driver ADA4350 FEATURES GENERAL DESCRIPTION Low noise, low input bias current FET input amplifier Very low input bias current: ±0.25 pA typical at 25°C Low input voltage noise 92 nV/√Hz typical at 10 Hz at 5 V 5 nV/√Hz typical at 100 kHz at ±5 V Gain bandwidth product: 175 MHz Input capacitance 3 pF typical, differential mode 2 pF typical, common mode Integrated gain switching Sampling and feedback switch off leakage: ±0.5 pA typical Worst case tON/tOFF times: 105 ns typical/65 ns typical The ADA4350 is an analog front end for photodetectors or other sensors whose output produces a current proportional to the sensed parameter or voltage input applications where the system requires the user to select between very precise gain levels to maximize the dynamic range. The ADA4350 integrates a FET input amplifier, a switching network, and an ADC driver with all functions controllable via a serial peripheral interface (SPI) or paralle...