SA58646RF/IF射頻/中頻RFID的射頻收發(fā)器IC規(guī)格書(shū)PDF中文資料

description

The SA58646 is a BiCMOS integrated circuit that performs all functions from the antenna

to the microcontroller for reception and transmission for both the base station and the

handset in a 902 MHz to 928 MHz full-duplex radio. The SA58646 may be used in a UHF

push-to-talk walkie-talkie or in a UHF to 900 MHz data transceiver. The SA58646 is a

pin-compatible derivative of the UAA3515 with advanced features.

This IC integrates most of the functions required for a half-duplex or full-duplex radio in a

single integrated circuit. Additionally, the programmability implemented reduces

significantly external components count, board space requirements and external

adjustments.

Features

RF RX (single frequency conversion FM receiver):

? Integrated LNA

? Image reject mixer

? FM detector at 10.7 MHz including an IF limiter, a wide band PLL demodulator, an

output amplifier and a RSSI output

? Carrier detection with programmable threshold

? Programmable data amplifier (slicer) phase

Synthesizer:

? Crystal reference oscillator with integrated tuning capacitor

? Reference frequency divider

? Narrow band RX PLL including RX VCO with integrated varicaps

? Narrow band TX PLL including TX VCO with integrated varicaps

? VCO external inductors can be done with printed transmission lines on the PCB

which offers substantial savings

? Programmable clock divider with output buffer to drive a microcontroller

Baseband RX section:

? Programmable RX gain (enable phone volume control)

? Expander with output noise level control

? Earpiece amplifier with volume control feature

? Data amplifier

Baseband TX section:

? Microphone amplifier

? Compressor with automatic level control and hard limiter

? Programmable TX gain