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| 型号： | SAA7706H/N107,557 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 20/52页 |
| 文件大小： | 0K |
| 描述： | IC CAR RADIO DSP 80-QFP |
| 标准包装： | 330 |
| 类型： | 汽车信号处理器 |
| 接口： | I²C，I²:S，LSB，SPDIF |
| 电压 - 输入/输出： | 3.30V |
| 电压 - 核心： | 3.30V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 80-BQFP |
| 供应商设备封装： | 80-QFP（14x20） |
| 包装： | 托盘 |
| 其它名称： | 935267098557 SAA7706H/N107 SAA7706H/N107-ND |
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2001 Mar 05
27
Philips Semiconductors
Product specication
Car radio Digital Signal Processor (DSP)
SAA7706H
8.15
RDS demodulator (pins RDS_CLOCK
and RDS_DATA)
The RDS demodulator recovers the additional inaudible
RDS information which is transmitted by FM radio
broadcasting. The (buffered) data is provided as output for
further processing by a suitable decoder. The operational
functions of the decoder are in accordance with the EBU
specification
”EN 50067”.
The RDS demodulator has three different functions:
Clock and data recovery from the MPX signal
Buffering of 16 bits, if selected
Interfacing with the microcontroller.
8.15.1
CLOCK AND DATA RECOVERY
The RDS-chain has a separate input. This enables RDS
updates during tape play and also the use of a second
receiver for monitoring the RDS information of signals from
an other transmitter (double tuner concept). It can as such
be done without interruption of the audio program. The
MPX signal from the main tuner of the car radio can be
connected to this RDS input via the built-in source
selector. The input selection is controlled by an I2C-bus bit.
The RDS chain contains a sigma-delta ADC (ADC3),
followed by two decimation filters. The first filter passes the
multiplex band including the signals around 57 kHz and
reduces the sigma-delta noise. The second filter reduces
the RDS bandwidth around 57 kHz. The overall filter curve
is shown in Fig.16 and a more detailed curve of the RDS
57 kHz band in Fig.17.
handbook, full pagewidth
152
0
100
0
38
114
MGT471
76
133
19
95
57
80
60
40
20
f (kHz)
α
(dB)
Fig.16 Overall frequency response curve decimation filters.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SAA7707H | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Car radio Digital Signal Processor CDSP |
| SAA7708H | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Car Radio Digital Signal Processor |
| SAA7709/N107 | 制造商:PHILIPS-SEMI 功能描述: |
| SAA7709H/N103 | 功能描述:音频 DSP DIGITAL SIGNAL PROCESSOR RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
| SAA7709H/N103,518 | 功能描述:音频 DSP DIRAC-2 RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
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