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SAA7705H

Features: 1.1 Hardware· Three 3rd-order Switched Capacitor Analog-to-Digital converters (SCADs)· Digital-to-Analog Converters (DACs) with four times oversampling and noise shaping· Digital stereo decoder for the FM multiplex signal· Improved digital Interference Absorption Circuit (IAC) for FM· Ra...

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SeekIC No. : 004484080 Detail

SAA7705H: Features: 1.1 Hardware· Three 3rd-order Switched Capacitor Analog-to-Digital converters (SCADs)· Digital-to-Analog Converters (DACs) with four times oversampling and noise shaping· Digital stereo de...

SAA7705H Data Sheet

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Part Number:
SAA7705H
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2025/12/26

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Product Details

Description



Features:

1.1 Hardware
· Three 3rd-order Switched Capacitor Analog-to-Digital converters (SCADs)
· Digital-to-Analog Converters (DACs) with four times oversampling and noise shaping
· Digital stereo decoder for the FM multiplex signal
· Improved digital Interference Absorption Circuit (IAC) for FM
· Radio Data System (RDS) processing with an optional 16-bit buffer via a separate channel (two tuners possible)
· Auxiliary high Common-Mode Rejection Ratio (CMRR) analog CD input (CD-walkman, speech, economic CD-changer, etc.)
· I2C-bus controlled
· Four channel 5-band I2C-bus controlled parametric equalizer
· Two separate full I2S-bus and LSB-justified formats high performance input interfaces
· Audio output short-circuit protected
· Separate AM left and right inputs
· Phase-Locked Loop (PLL) to generate the high frequency DSP clock from a common fundamental oscillator crystal
· Analog single-ended tape inputs
· I2S-bus subwoofer output (mono or stereo)
· Expandable with additional DSPs for sophisticated features through an I2S-bus gateway
· Operating ambient temperature from -40 to +85 °C.
1.2 Software
· Improved FM weak signal processing
· Integrated 19 kHz MPX filter and de-emphasis
· Electronic adjustments: FM/AM level, FM channel separation and Dolby level
· Baseband audio processing (treble, bass, balance, fader and volume)
· Dynamic loudness or bass boost
· Audio level meter
· Tape equalisation (tape analog playback)
· Music Search System (MSS) detection for tape
· Dolby-B tape noise reduction
· Adjustable dynamics compressor
· CD de-emphasis processing
· Improved AM reception
· Soft audio mute
· AM IAC
· Pause detection for RDS updates
· Signal level, noise and multipath detection for AM/FM signal quality information.


Application

· Car radio systems.


Pinout

Connection Diagram


Specifications

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
VDD

Vn

IIK

IOK

IO(sink/source)

IDD,ISS

Tamb

Tstg

VESD



Ilu(prot)

Ptot		 supply voltage

input voltage on any pin

DC input clamping diode current

DC output clamping diode
current

DC output source or sink current

supply current per supply pin

ambient operating temperature

storage temperature range

ESD voltage
human body model
machine model

latch-up protection current

total power dissipation





VI < -0.5 V or VI > VDD + 0.5 V

VO < -0.5 V or VO > VDD + 0.5 V

-0.5 V < VO < VDD + 0.5 V






100 pF; 1500

200 pF; 0.5 mH; 10

CIC spec/test method




 -0.5

-0.5

-

-

-

-

-40

-65

2000

200

100

-		 +3.6

+5.5

±10

±20

±20

±50

+85

+125

-

-

-

890		 V

V

mA

mA

mA

mA

°C

°C

V

V

mA

mW



Description

The SAA7705H performs all the signal functions in front of the power amplifiers and behind the AM and FM multiplex demodulation of a car radio or the tape input.

These functions of SAA7705H are:
· Interference absorption
· Stereo decoding
· RDS decoding
· FM and AM weak signal processing (soft mute, sliding stereo, etc.)
· Dolby-B tape noise reduction
· Audio controls (volume, balance, fader and tone).

Some functions of SAA7705H have been implemented in the hardware (stereo decoder, RDS decoding and IAC for FM multiplex) and are not freely programmable. Digital audio signals from external sources with the Philips I2S-bus format or the LSB-justified 16, 18 or 20 bits format are accepted.

There are four independent analog output channels of SAA7705H. The channels have a hardware implemented 5-band parametric equalizer, controlled via the I2C-bus.




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