High Speed PLL For DTS



TB2118FG is a high−speed phase−locked loop (PLL) LSI for car audio tuners with a built−in charge pump circuit. All functions are controlled through serial bus lines. The device is used to configure high−performance digital tuning systems.

Features

Built−in high−speed program divider with built−in prescalers.

 FM: 30~150MHz (pulse swallowing method)   AM: 1~40MHz (pulse swallowing method)

Phase comparator outputs are constant current output for both FM and AM. Current values can be switched using serial data. In high−speed mode for large current output seek, the lockup time between FM band edges can be set to approx. 500µs by selecting an appropriate VT range and low−pass filter constant.

RDS supported

N−value data and charge pump output current data (total of 18−bits) can be selected using two resisters.

Built−in low−pass filter op−amps for FM and AM.

Built−in 20−bit binary counter for counting IF frequency.

Crystal oscillator can be used 10.25MHz or 10.35MHz.

Two output ports (open−collector output) and two I / O ports (CMOS) supported.

Package is SSOP 24 pin.