Datasheet > RDA1846S

RDA1846S

更新时间： 2022-05-21 08:16:44

品牌	Logo	应用领域
RDC		射频对讲机
页数	文件大小	规格书
16页	592K
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RDA1846S 数据手册

RDA1846S

SINGLE CHIP TRANSCEIVER FOR WALKIE TALKIE Rev.0.1–Aug.2011

1. General Description

The RDA1846S 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 RDA1846S has a powerful digital signal

processor, which makes it have optimum voice

quality, flexible function options, and robust

performance under varying reception conditions.

The RDA1846S 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.

Figure 1.1 RDA1846S Top View

23/24 bit programmable DCS code

1.1 Features



CMOS single-chip fully-integrated transceiver

Fully integrated frequency synthesizer and VCO

Support worldwide frequency band





DTMF and programmable in-band dual tone

Programmable in-band single tone transmitter

Auto RX/TX/SLEEP state switching

8 GPIOs



RDA1846S :134MHz ~ 174MHz

200MHz~ 260MHz

400MHz ~ 520MHz

3-wire/4-wire/I²C serial control bus interface



12.5KHz, 25KHz channels

Support multiple XTAL clocks

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



12.8/25.6Mhz

13/26Mhz



Digital auto frequency control (AFC)

Digital auto gain control (AGC)

Selectable pre/de-emphasis

1.2 Applications

Received signal strength indicator (RSSI)

VOX and SQ



Cellular handsets

Family radio services

Walkie Talkies

Build-in CTCSS/CDCSS generator and judgment



CTCSS with 120/180 /240 degree phase shift

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.

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