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Datasheet

SAA7706H
(Product Specification)
05-Mar-01, 52 pages, 272 kB

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General description

The SAA7706H performs all the signal functions in front of the power amplifiers and behind the car radio tuner AM and FM outputs and the CD, tape and phone inputs. These functions are:

  • Interference absorption
  • Stereo decoding for FM and AM (stereo)
  • RDS-demodulation
  • FM and AM weak signal processing (soft mute, sliding stereo and high cut)
  • Dolby-B tape noise reduction
  • CD de-emphasis function
  • Audio controls for volume, balance, fader, tone and dynamics compression.


Some functions have been implemented in hardware (FM stereo decoder, RDS-demodulator and FM Interference Absorption Circuit (IAC) and are not freely programmable.

Digital audio signals from external sources with the Philips I²S-bus and the LSB-justified 16, 18, 20 and 24 bits format or SPDIF format are accepted.

The big advantage of this SAA7706H device is the ?dual media support?; this enables independent front seat and rear seat audio sources and control.

Features

Hardware

  • 5-bitstream 3rd-order sigma-delta Analog-to-Digital Converters (ADCs) with anti-aliasing broadband input filter
  • 1-bitstream 1st-order sigma-delta ADC with anti-aliasing broadband input filter
  • 4-bitstream Digital-to-Analog Converters (DACs) with 128-fold oversampling and noise shaping
  • Integrated semi-digital filter; no external post filter required for DAC
  • Dual media support: allowing separate front-seat and rear-seat signal sources and separate control
  • Simultaneous radio and audio processing
  • Digital FM stereo decoder
  • Digital FM interference suppression
  • RDS demodulation via separate ADC; with buffered output option
  • Two mono Common-Mode Rejection Ratio (CMRR) input stages for voice signals from phone and navigation inputs
  • Phone and navigation mixing at DAC front outputs
  • Two stereo CMRR input stages (CD-walkman and CD-changer etc.)
  • Analog single-ended TAPE and AUX input
  • Separate AM-left and AM-right inputs in the event of use of external AM stereo decoder
  • One digital input: I²S-bus or LSB-justified format
  • Two digital inputs: SPDIF format
  • Co-DSP support via I²S-bus or LSB-justified format
  • Audio output short-circuit protected
  • I²C-bus controlled (including fast mode)
  • MOST bus interfacing (details in separate manual)
  • Phase-locked loop derives the internal clocks from one common fundamental crystal oscillator
  • Combined AM/FM level input
  • Pin compatible with SAA7705 and SAA7708
  • All digital inputs are tolerant of 5 V input levels
  • All analog inputs have high GSM immunity
  • Low number of external components required
  • -40 to +85 Cel operating temperature range
  • Easy applicable.


Software

  • Improved FM weak signal processing
  • Integrated 19 kHz MPX filter; de-emphasis and stereo detection
  • Electronic adjustments: FM or AM level, FM channel separation, Dolby ¹) level
  • Baseband audio processing (treble, bass, balance, fader and volume)
  • Four channel 5-band parametric equalizer
  • 9-bands mono audio spectrum analyzer
  • Extended beep functions with tone sequencer for phone rings
  • Large volume jumps e-power interpolated to prevent zipper noise
  • Dual media support; allowing separate front-seat and rear-seat signal sources and separate control
  • Dynamic loudness or bass boost
  • Audio level monitor
  • Tape equalization and Music Search System (MSS) detection for tape
  • Dolby-B tape noise reduction (at 44.1 kHz only)
  • Dynamics compression available in all modes
  • CD de-emphasis processing
  • Voice-over possibility for phone and navigation signals
  • Improved AM signal processing
  • Digital AM CQUAM stereo decoder (not in all rom_codes available)
  • Digital AM interference suppression
  • Soft audio mute
  • RDS update processing: pause detection, mute and signal-quality sensor-freeze
  • General purpose tone generator
  • Noise generator allows for frequency response measurements
  • Boot-up ROM for fast start-up
  • Signal level, noise and multipath detection for AM or FM signal quality information
  • AM co-channel and adjacent channel detection (not in all rom_codes available).


¹) Dolby - Available only to licensees of Dolby Laboratories Licensing Corporation, San Francisco, CA94111, USA, from whom licensing and application information must be obtained. Dolby is a registered trade-mark of Dolby Laboratories Licensing Corporation.

Products/packages

Type numberNorth American Type numberOrdering code (12NC)Product statusPackagePackingMarkingChemical contentLeadfree conversion date
SAA7706H/N107SAA7706H/N107-T9352 670 98518Volume productionSOT318-2
(QFP80)
Reel Dry Pack, SMD, 13"Standard MarkingSAA7706H/N107
week 12, 2005
SAA7706H/N107SAA7706H/N1079352 670 98557Volume productionSOT318-2
(QFP80)
Tray Dry Pack, Bakeable, MultipleStandard MarkingSAA7706H/N107
week 12, 2005
SAA7706H/N1099352 678 59518Volume productionSOT318-2
(QFP80)
Reel Dry Pack, SMD, 13"Standard MarkingSAA7706H/N109
week 12, 2005
SAA7706H/N109SAA7706H/N1099352 678 59557Volume productionSOT318-2
(QFP80)
Tray Dry Pack, Bakeable, MultipleStandard MarkingSAA7706H/N109
week 12, 2005
SAA7706H/N210SAA7706H/N210-T9352 702 85518Volume productionSOT318-2
(QFP80)
Reel Dry Pack, SMD, 13"Standard MarkingSAA7706H/N210
week 12, 2005
SAA7706H/N210SAA7706H/N2109352 702 85557Volume productionSOT318-2
(QFP80)
Tray Dry Pack, Bakeable, MultipleStandard MarkingSAA7706H/N210
week 12, 2005

Pricing/ordering/availability

Type numberOrdering code(12NC)Indicative price/unit($)RegionDistributorIn stockInventory dateBuy onlineSamples
SAA7706H/N1079352 670  98518        Order samples
SAA7706H/N1079352 670  98557       not available
SAA7706H/N1099352 678  59518        Order samples
SAA7706H/N1099352 678  59557       not available
SAA7706H/N2109352 702  85518        Order samples
SAA7706H/N2109352 702  85557       not available

Applications

  • High-end car radio systems.


Block diagrams/pinning

Parametrics/similar products

Type numberPackageSupply
voltage(V)
Dolby B
noise
reduction
Improved
FM
weak
signal
processing
Integrated
19
kHz
MPX
filter
and
de-emphasis
Electronic
adjustment
of
FM/AM
level,
FM
channel
separation
and
Dolby
level
Treble,
bass,
balance,
fader
and
volume
baseband
audio
processing
Dynamic
loudness
or
bass
boost
Phone
and
navigation
audio
mixing
and
processing
in
DSP
9 band
mono
audio
spectrum
analyzer
Audio
level
meter
Music
Search
detection
for
Tape(MSS)
Pause
detection
for
RDS
updates
Adjustable
dynamics
compressor
CD
de-emphasis
processing
Improved
AM
reception
Soft
audio
mute
Signal
level,
noise
and
multipath
detection
Three
3rd
order
SCAD
D/A
converters
with
four
fold
over
sampling
and
noise
shaping
Digital
stereo
decoder
Improved,
digital
IAC
for
FM
RDS
processing
with
optional
16-bit
buffer
Auxiliary
high
CMRR
analog
CD
input
4 channel
5 band
I²C-bus
controlled
parametric
equalizer
Two
separate
full
I²S
and
LSB
justified
formats
high
performance
outputs
Audio
output
short
circuit
protected
I²C-bus
controlled
Separated
AM
left
and
right
inputs
Phase
Lock
Loop
Analog
single-ended
tape
inputs
Expandable
with
additional
DSPs
SAA7706H/N107SOT318-2
(QFP80)
3.3~5.0yesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyesyes


Similar products
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