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SAA7740H

Features: · Two digital inputs and two digital outputs in the I2S-bus format (i.e. 4 audio channels)· Independent input/output interfaces· Slave input/output interfaces· Slave processing· I2C-bus microcontroller interface· DC filtering at the inputs· One programmable 2nd-order digital filter unit·...

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SeekIC No. : 004484089 Detail

SAA7740H: Features: · Two digital inputs and two digital outputs in the I2S-bus format (i.e. 4 audio channels)· Independent input/output interfaces· Slave input/output interfaces· Slave processing· I2C-bus mi...

SAA7740H Data Sheet

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Part Number:
SAA7740H
Supply Ability:
5000

Price Break

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

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Product Details

Description



Features:

· Two digital inputs and two digital outputs in the I2S-bus format (i.e. 4 audio channels)
· Independent input/output interfaces
· Slave input/output interfaces
· Slave processing
· I2C-bus microcontroller interface
· DC filtering at the inputs
· One programmable 2nd-order digital filter unit
· Two multiply accumulate processor units (24 ×16-bit/MAC)
· DRAM interface and address computation unit for external delay lines
· On-chip coefficient and external delay line address storage
· Hardware controlled soft mute via the MUTE pin
· Hardware controlled soft demute via the RST pin
· Operating ambient temperature; -40 to +85 °C. Software
· 5-band parametric equalizer with selectable centre frequency, slope setting and boost/cut gain settings from -12 to +12 dB
· Stereo width control from mono to stereo to spatial stereo
· Stereo Hall-effects for field acoustics, such as concert halls, with 8 coefficients and 8 delayed taps per channel
· External delay line processing for delays up to 1 second
· Reverberation with selectable reverberation time (up to 5 seconds) and energy
· Three different surround sound programs to obtain a spatial effect on 4 loudspeakers
· Passive DOLBY surround processing with the addition of an external dynamic noise reduction IC
· Karaoke processing
· Dual 16th-order correction filtering
· Quad 8th-order correction filtering
· Digital volume and balance control
· Soft controlled soft mute/demute via the microcontroller interface
· Input switching matrix
· Output rear and front switching matrix.


Application

· Digital amplifiers
· Audio combination sets
· Car audio systems
· TV audio channels.


Pinout

Connection Diagram


Specifications

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
VDD

VDD

IIK

IOK

IO

IDD

ISS

LTCH

PO

Ptot

Tstg

Tamb

Ves		 DC supply voltage
(each supply pin)

voltage difference between VDD
and VDDX

DC input clamp diode current

DC output clamp diode current
(output type 4 mA)

DC output sink or source

current (output type 4 mA)

DC supply current per pin

DC supply current per pin

latch-up protection

power dissipation per output

total power dissipation

storage temperature

operating ambient temperature

electrostatic discharge






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


VO < -0.5 V or

VO > VDD + 0.5 V

-0.5 < VO < VDD + 0.5 V

CIC specification/test method










note 1

note 2		 -0.5

-

-

-

-

-

-

100

-

-

-65

-40

-3000


-300		 +6.5

550

±10

±20

±20

50

50

-

100

1

+150

+85

+3000


+300		 V

mV

mA

mA

mA

mA

mA

mA

mW

W

°C

°C

V


V
Notes
1. Human body model: C = 100 pF; R = 1.5 k.
2. Machine model: C = 200 pF; L = 2.5 mH; R = 0 .


Description

The SAA7740H is a function-specific digital signal processor. The device is capable of performing processing for listening-environments such as equalization, hall-effects, reverberation, surround-sound and digital volume/balance control. The SAA7740H can also be reconfigured (in a dual and quad filter mode) so that it can be used as a digital filter with programmable characteristics.

For reasons of silicon efficiency, the SAA7740H realises most functions directly in hardware. The flexibility exists in the possibility to download function parameters, correction coefficients and various configurations from a host microcontroller (see Fig.1). The parameters of SAA7740H can be passed in real time and all functions can be switched on simultaneously.

The communication with a host microcontroller conforms with the standard I2C-bus format. The SAA7740H accepts 2 digital stereo signals in the I2S-bus format at audio sampling frequency (fas) and provides 2 digital stereo outputs.




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