參數(shù)資料
型號： SAA7706H
廠商： NXP Semiconductors N.V.
元件分類： 數(shù)字信號處理
英文描述： Car radio Digital Signal Processor (DSP)
封裝： SAA7706H/N109S<SOT318-2 (QFP80)|<<http://www.nxp.com/packages/SOT318-2.html<1<Always Pb-free,;SAA7706H/N109S<SOT318-2 (QFP80)|<<http://www.nxp.com/packages/SOT318-2.html&
文件頁數(shù)： 17/52頁
文件大?。?/td> 271K
代理商： SAA7706H
2001 Mar 05
17
Philips Semiconductors
Product specification
Car radio Digital Signal Processor (DSP)
SAA7706H
8.3
Signal path for level information
For FM weak signal processing, for AM and FM purposes
(absolute level and multipath) a level input is implemented
(pin LEVEL). In the event of radio reception the clocking of
the filters and the level-ADC is based on a 38 kHz
sampling frequency. A DC input signal is converted by a
bitstream sigma-delta ADC followed by a decimation filter.
The input signal has to be obtained from a radio part. The
tuner must deliver the level information of either AM or FM
to pin LEVEL.
The input signal for level must be in the range 0 to 3.3 V
(V
VDACP
V
VDACN
). The 9-bit level-ADC converts this
input voltage in steps with a resolution better than at least
14 mV over the 3.3 V range.
The tolerance on the gain is less than 2%. The MSB is
always logic 0 to represent a positive level. Input level
span can be increased by an external resistor tap. The
high input impedance of the level-ADC makes this
possible.
The decimation filter reduces in the event of an 38 kHz
based clocking regime the bandwidth of the incoming
signal to a frequency range of 0 to 29 kHz with a resulting
f
s
= 76 kHz. The response curve is given in Fig.9.
The level information is sub-sampled by the DSP1 to
obtain a field strength and a multipath indication. These
values are stored in the coefficient or data RAM. Via the
I
2
C-bus they can be read and used in other microcontroller
programs.
handbook, full pagewidth
(dB)
0
10
40
30
80
70
60
50
20
40
50
60
10
0
30
20
f (kHz)
MGT465
Fig.9 Frequency response level-ADC and decimal filter.
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參數(shù)描述
SAA7706H/N107 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC DIGITAL SIGNAL PROCESSOR RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時器數(shù)量:3 設備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風格:SMD/SMT
SAA7706H/N107,518 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC DIRAC-1 RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時器數(shù)量:3 設備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風格:SMD/SMT
SAA7706H/N107,557 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC DIGITAL SIGNAL RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時器數(shù)量:3 設備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風格:SMD/SMT
SAA7706H/N107S,518 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC CAR RADIO DIGITAL SIGNAL PROCESSOR RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時器數(shù)量:3 設備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風格:SMD/SMT
SAA7706H/N107S,557 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC INTEGRATED RDS/TMC RECEIVER RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時器數(shù)量:3 設備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風格:SMD/SMT
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