Automotive 5.5-GHz gain bandwidth, decompensated transimpedance amplifier with FET input

The OPA858-Q1 is a wideband,

low-noise operational amplifier with CMOS

inputs for wideband transimpedance

and voltage amplifier applications. When the device is

configured as a transimpedance amplifier (TIA), the 5.5-GHz gain bandwidth product (GBWP)

enables high closed-loop bandwidths at transimpedance gains in the range of tens to

hundreds of kΩs.

The graph below shows the bandwidth and noise

performance of the OPA858-Q1 as a function of

the photodiode capacitance when the amplifier is configured

as a TIA. The total noise is calculated along a bandwidth

range extending from DC to the calculated frequency

(f) on the left scale. The OPA858-Q1 package has a feedback pin

(FB) that simplifies the feedback network connection between

the input and the output.

The OPA858-Q1 is optimized to

operate in optical time-of-flight (ToF) systems where the

OPA858-Q1 is used with

time-to-digital converters, such as the TDC7201. Use the OPA858-Q1 to drive a high-speed

analog-to-digital converter (ADC) in high-resolution LIDAR

systems with a differential output amplifier, such as the

THS4541-Q1.