Part Number: RDA1846
Function: Single-chip Transceiver
Package: QFN 32 Pin Type
The RDA1846 is a highly integrated single-chip transceiver for Walkie Talkie applications. It totally realizes the translation from RF carrier to voice in the RX path and from voice to RF carrier in the TX path, requiring only one micro controller. The RDA1846 has a powerful digital signal processor, which makes it have optimum voice quality, flexible function options, and robust performance under varying reception conditions. The RDA1846 can be tuned to the worldwide frequency band for Walkie Talkie from 400MHz to 500MHz and especially from 134MHz to 174MHz which meets the frequency band of weather broadcast. The transceiver uses the CMOS process with a package size of 5X5mm. By virtue of its high integration, it requires the least external components and eliminates the complicated design of sensitive RF circuits on PCB.
CMOS single-chip fully-integrated transceiver Fully integrated frequency synthesizer and VCO Support worldwide frequency band
134MHz ~ 174MHz 400MHz ~ 500MHz MIC_IN AVDD Figure 1.1 RDA1846 Top View DTMF and programmable in-band dual tone Programmable in-band single tone transmitter Auto RX/TX/SLEEP state switching 8 GPIOs 3-wire/4-wire/I2C serial control bus interface On chip 8 dBm PA Analog and digital volume control Directly support 32Ω resistance loading 3.3 to 4.8 V supply voltage with Integrated LDO 5X5 mm 32 pin QFN package 12.5KHz, 25KHz channels Support multiple XTAL clocks 12.8/25.6Mhz 13/26Mhz Digital auto frequency control (AFC) Digital auto gain control (AGC) Selectable pre/de-emphasis Received signal strength indicator (RSSI) VOX and SQ Build-in CTCSS/CDCSS generator and judgment CTCSS with 120/180 /240 degree phase shift 23/24 bit programmable DCS code 1.2 Applications Cellular handsets Family radio services Walkie Talkies Copyright © RDA Microelectronics Inc. 2009. All rights are reserved. The information contained herein is the exclusive property of RDA and shall not be distributed, reproduced, or disclosed in whole or in part without prior written permission of RDA. AFOUT AVDD NC NC Cc GPIO7 Free Datasheet http:// 2. Table of Contents General Description 1 1.1 Features1 1.2 Applications .1 2. Table of Contents [.]