LTC6563 Series

The LTC6563 is a low-noise four-channel transimpedance amplifier (TIA) with 600MHz bandwidth. The LTC6563 TIA’s low noise, wide linear range, and low power dissipation are ideal for LIDAR receivers using Avalanche photodiodes (APDs) and photodiodes (PDs). The amplifier features selectable 22.2/16.7/11.1/5.55kΩ Transimpedance gain (RT) and 90μA linear input current range. Using an APD with a total input capacitance of 0.5pF, the input current noise density is 1.8pA/√Hzat 100MHz and 3.7pA/√Hzat 600MHz. The LTC6563 consumes between 194mW and 325mW on a 3.3V supply depending on output mode. An internal 4-to-1 MUX simplifies the system design. In addition, external multiplexing capability allows channel expansion up to 64 channels, saving space and power. Fast overload recovery and fast channel switchover make the LTC6563 well suited for LIDAR receivers with multiple APDs. The built-in high-speed differential ADC driver can swing as much as 2VP-Pwhile driving into 100Ω external differential load.The LTC6563 is packaged in a 3mm × 5mm 24-pin exposed pad QFN package with wettable flanks.APPLICATIONSAutomotive LIDAR ReceiverIndustrial LIDAR Receiver