德州仪器基于SN761633的FM收音机解决方案

TI 公司的SN761633 是单片FM立体声收音机接收器和发送器，频率范围从76 MHz 到108 MHz，广泛用于手提媒体播放器 (PMP)，MP3 播放器和个人导航设备。

本文介绍了SN761633的主要性能，功能方框图以及应用电路图。

The SN761633 is an FM radio receiver and transmitter IC for portable audio players.The circuit consists of a stereo FM radio receiver and FM transmitter， and is available in a small-outline package.

主要特性：

·Single-Chip FM Stereo Radio and Transmitter

·FM Stereo MPX [Receive (Rx)， Transmit (Tx)]

·Frequency Range 76 MHz to 108 MHz (Rx， Tx)

·Low Supply Current

·Rx： 11.5 mA (VCC = 3 V， No RF Input)

·Tx： 13 mA (VCC = 3 V， No Audio Input，

·RTX = Open)

·32.768-kHz Crystal

·I2C Interface

·MPX Output for RDS (Rx)

·Seek Tuning (Rx)

·RFAGC (Rx)

·RF Auto-Power Control (Tx)

·Pilot Cancel (Rx)

·Sixth-Order 15-kHz LPF (Tx)

·Programmable De/Pre-Emphasis (50/75 µs)

·Pilot Out (Tx)

·General-Purpose External Input (Tx)

·High Power Selectable RF Output (Tx)

·–7/–3/1/4 dBm

·High Cut Control (HCC)， Stereo Noise Control (SNC) (Rx)

·Soft Mute (Rx)

·VCC = 2.5 V to 4 V

·40-Pin QFN Package

应用：

·手提媒体播放器

·MP3 播放器

·个人导航设备

图1SN761633方框图

图2 SN761633应用电路图