|
|
PDF RDA5820 Data sheet ( Hoja de datos )
| Número de pieza | RDA5820 | |
| Descripción | SINGLE-CHIP BROADCAST FM TRANSCEIVER | |
| Fabricantes | RDA | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de RDA5820 (archivo pdf) en la parte inferior de esta página. Total 28 Páginas | ||
|
No Preview Available !
RDA5820
SINGLE-CHIP BROADCAST FM TRANSCEIVER Rev.1.3–Oct.2008
1 General Description
The RDA5820 is a single-chip broadcast FM
transceiver with fully integrated synthesizer, IF
selectivity and MPX decoder. The chip uses the
CMOS process, support multi-interface and
require the least external component. The
package size is 4X4mm and is completely
adjustment-free. All these make it very suitable for
portable devices.
The RDA5820 has a powerful low-IF digital audio
processor, this make it have optimum sound
quality with varying reception conditions.
The RDA5820 use RDA patented dual
synthesizers, all digital transmit structure, this
make it have perfectly transmition performance
and agility.
Figure 1-1. RDA5820 Top View
The RDA5820 support 65M~115M frequency band receive and transmit, integrate 4K memory, these
make it can be used in simple wireless control appliance such as toy.
1.1 Features
l CMOS single-chip fully-integrated FM transceiver
l Low power consumption
Ø Total current consumption lower than 20mA at
3.0V power supply
l Support worldwide and campus frequency band
Ø 65 -115 MHz
l Digital low-IF tuner
Ø Image-reject down-converter
Ø High performance A/D converter
Ø IF selectivity performed internally
l Fully integrated digital frequency synthesizer
Ø Fully integrated on-chip RF and IF VCO
Ø Fully integrated on-chip loop filter
l All digital transmitter
l Autonomous search tuning
l Support integrated Rx/Tx PCB antenna
l Support SNR FM searching
l Include 4K memory
l Support 32.768KHz crystal oscillator
l Digital auto gain control (AGC)
l Digital adaptive noise cancellation
Ø Mono/stereo switch
Ø Soft mute
Ø High cut
l Programmable de-emphasis (50/75 µs)
l Receive signal strength indicator (RSSI)
l Bass boost
l Volume control
l Support I2S digital transmitter
l Support audio power amplifier ( 32Ω resistance
Copyright © RDA Microelectronics Inc. 2006. 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.
1 page  
RDA Microelectronics, Inc.
RDA5820 FM Transceiver V1.3
Figure 3-2. RDA5820 FM Transmit Block Diagram
3.3 FM Transmitter
The transmitter uses a digital modulate
structure. Audio signals (LIN and RIN) are
amplified by PGAs firstly, then converted to
digital codes by ADCs. The DSP core finishes
audio coding and FM modulate, pre-emphasis.
The syntersizer2 transmits the digital FM data
to VCO2. The PA (Power Amplifier) amplify the
FM signal.
The PGA gain and PA gain are adjustable by
set according registers bits (PGA_GAIN[2:0]
and PA_GAIN[5:0]).
PGA_GAIN V-LIN(VPP) PGA_GAIN V-LIN(VPP)
[2:0] [2:0]
000
1.20V
100
0.075V
001
0.60V
101
0.037V
010
0.30V
110
0.018V
011
0.15V
111
0.009V
3.4 Audio Amplify
Audio signals (LIN and RIN) can also directly
send to audio amplifier in DACs and driving the
headphone through LOUT and ROUT ports.
3.5 I2S
The RDA5820 supports directly digital FM
transmit. The digital signals can input through
chip’s ports GPIO1/2/3, then transmits directly
through synthersizer2 and PA.
Also transmit to DAC and send out through
LOUT and ROUT ports.
I2S mode support master and slave mode.
3.6 PA
The PA (Power Amplifier) work frequency band is
65~115MHz, and output power is linearly
adjustable. The PA use linear structure for better
frequency distortion performance.
3.7 Synthesizer1
The frequency synthesizer 1 (including
synthesizer1 and VCO1 ) generates the local
oscillator signal which divide to quadrature, then
be used to downconvert the RF input to a
constant low intermediate frequency (IF). The
synthesizer reference clock is 32.768 KHz.
The synthesizer1 frequency is defined by bits
CHAN[9:0] with the range from 65MHz to
115MHz.
The synthesizer1 also generates reference to
synthesizer2 under FM TX (transmit) mode.
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.
Page 4 of 28
5 Page 
RDA Microelectronics, Inc.
RDA5820 FM Transceiver V1.3
7 Serial Interface
7.1 Three-wire Interface Timing
Table 7-1 Three-wire Interface Timing Characteristics
(VDD = 2.7 to 5.5 V, TA = -25 to 85 °C, unless otherwise specified)
PARAMETER
SYMBOL TEST CONDITION MIN TYP MAX UNIT
SCLK Cycle Time
SCLK Rise Time
SCLK Fall Time
SCLK High Time
SCLK Low Time
SDIO Input, SEN to SCLK↑ Setup
SDIO Input, to SCLK↑ Hold
SCLK↑ to SDIO Output Valid
SEN↑ to SDIO Output High Z
tCLK
tR
tF
tHI
tLO
ts
th
tcdv
tsdz
Read
Read
35 ns
50 ns
50 ns
10 ns
10 ns
10 -
- ns
10 -
- ns
2 - 10 ns
2 - 10 ns
Digital Input Pin Capacitance
5 pF
Figure 7-1. Three-wire Interface Write Timing Diagram
Figure 7-2. Three-wire Interface Read Timing Diagram
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.
Page 10 of 28
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet RDA5820.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| RDA5820 | SINGLE-CHIP BROADCAST FM TRANSCEIVER | RDA |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |