By Texas Instruments 27
Texas Instruments' OPA858 is a wideband, low-noise op-amp with CMOS inputs for wideband transimpedance and voltage amplifier applications. When the device is configured as a transimpedance amplifier (TIA), the 5.5 GHz GBWP enables applications requiring high closed-loop bandwidths at transimpedance gains in the tens to hundreds of kΩs range.
The OPA858 can be a function of the photodiode capacitance when the amplifier is configured as a TIA. The total noise is calculated over a bandwidth range extending from DC to the calculated f-3 dB frequency. The device package features a feedback pin (FB) that simplifies the feedback network connection between the input and the output.
The OPA858 is optimized for use in optical ToF systems when used with a time-to-digital converter. The OPA858 can be used in high-resolution LIDAR systems with a high-speed analog-to-digital converter (ADC) and a differential output amplifier to drive the ADC.