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): 11/52頁
文件大?。?/td> 271K
代理商: SAA7706H
2001 Mar 05
11
Philips Semiconductors
Product specification
Car radio Digital Signal Processor (DSP)
SAA7706H
8
FUNCTIONAL DESCRIPTION
8.1
Analog front-end
The analog front-end consists of two identical sigma-delta
stereo ADCs (ADC1 and ADC2) with several input control
blocks for handling common mode signals and acting as
input selector. A mono version (ADC3) is added for
handling RDS signals. Also a first-order sigma-delta ADC
for tuner level information is incorporated.
The switches S1 and S2 select (see Fig.3) between the
FM_MPX/FM_RDS and the CD, TAPE, AUX, AM,
PHONE and NAV connection to ADC1 and ADC2. The
inputs CD, TAPE, AUX, AM, PHONE and NAV can be
selected with the audio input controls (AIC1/2). The
ground reference (G0 and G1) can be selected to be able
to handle common mode signals for CD or TAPE. The
ground reference G0 is connected to an external pin
and G1 is internally referenced (see Fig.4).
The PHONE and NAV inputs have their own CMRR input
stage and can be redirected to ADC1/2 via the Audio Input
Control (AIC). For pin compatibility with SAA7704,
SAA7705 and SAA7708 the AM is combined with the NAV
input. It is also possible to directly mix PHONE or NAV
(controlled with MIXC) with the front FSDAC channels
after volume control. The FM inputs (FM_MPX/FM_RDS)
can be selected with external pin SEL_FR. The
FM and RDSinputsensitivitycanbeadjustedwithVOLFM
and VOLRDS via I
2
C-bus.
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