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SAA7706H

Car radio Digital Signal Processor (DSP)

Philips Electronics 

Philips Semiconductors

Car radio Digital Signal Processor (DSP)

Product specification

SAA7706H

• 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).

2 APPLICATIONS

• High-end car radio systems.

3 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.

4 QUICK REFERENCE DATA

SYMBOL

PARAMETER

Supplies

VDD

operating supply voltage

IDDD

supply current of the digital part

IDDA

supply current of the analog part

Ptot

total power dissipation

FM_MPX input

Vi(con)(max)(rms) maximum conversion input level

(RMS value)

THD

total harmonic distortion

S/N

signal-to-noise ratio input stereo

CD, TAPE, AUX and AM inputs

Vi(con)(max)(rms) maximum conversion input level

(RMS value)

CONDITIONS

MIN. TYP. MAX. UNIT

all VDD pins with respect 3

to VSS

DSP1 at 50 MHz; DSP2 −

at 62.9 MHz

zero input and output −

signal

DSP1 at 50 MHz; DSP2 −

at 62.9 MHz

3.3

3.6 V

110

150 mA

40

60

mA

540

750 mW

THD < 1%;

0.33

VOLFM = 00H

input signal 0.368 V

−

(RMS) at 1 kHz;

−

bandwidth = 19 kHz;

VOLFM = 00H

input signal at 1 kHz;

75

bandwidth = 40 kHz;

0 dB reference = 0.368 V

(RMS); VOLFM = 00H

0.368

−70

0.03

81

−

V

−65 dB

0.056 %

−

dB

THD < 1%

0.6 0.66 −

V

2001 Mar 05

4

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