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.

特性 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.