DESCRIPTION
Demonstration circuit 2900A is a 16-channel analog
LiDAR receiver chain. The LTC®6561 is featured; which
has 74kΩ transimpedance gain and 30μA linear input
current range. Utilizing the LTC6561’s output MUX, four
devices are combined to a single output. The LTC6561’s
fast overload recovery makes it well suited for LIDAR
receivers. The LTC6561 operates from 5V single supply.
The LTC6561’s single-ended output can swing 2VP-P
on a 100Ω load. On the DC2900A, the FirstSensor’s
16-channel 400nm to 1100nm wavelength sensitive APD
array sensor feeds four LTC6561s for current to voltage
conversion and amplification. The APDs are DC coupled
to the TIAs inputs to facilitate fast channel switching and
output multiplexing. The DC2900A AC-coupled output is
intended to demonstrate time domain measurements into
50Ω systems.