Automotive 1.8-GHz unity-gain bandwidth, 3.3-nV/√Hz, FET input amplifier

The OPA859-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 0.9-GHz gain bandwidth product (GBWP)

enables high closed-loop bandwidths in low-capacitance photodiode

applications.

The graph below shows the bandwidth and noise

performance of the OPA859-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 OPA859-Q1 package has a feedback pin

(FB) that simplifies the feedback network connection between

the input and the output.

The OPA859-Q1 is optimized to

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

OPA859-Q1 is used with

time-to-digital converters, such as the TDC7201. Use the OPA859-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.