TDA7340 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

TDA7340

AUDIO SIGNAL PROCESSOR

STMicroelectronics 

TDA7340

SPEAKER ATTENUATORS

MSB

LSB SPEAKER ATTENUATORS LF, LR, RF, RR

D7 D6 D5 D4 D3 D2 D1 D0

-1.25dB STEPS

1

1

1

0

0

0 0dB

1

1

1

0

0

1 -1.25dB

1

1

1

0

1

0 -2.5dB

1

1

1

0

1

1 -3.75dB

1

1

1

1

0

0 -5dB

1

1

1

1

0

1 -6.25dB

1

1

1

1

1

0 -7.5dB

1

1

1

1

1

1 -8.75dB

10dB STEPS

1

1

1

0

0

0dB

1

1

1

0

1

-10dB

1

1

1

1

0

-20dB

1

1

1

1

1

-30dB

1

1

1

1

1

1

1

1 Speaker Mute

For example an attenuationof 25dB on a selected output is given by: 11110100

STEREO DECODER

MSB

LSB

D7 D6 D5 D4 D3 D2 D1 D0

FUNCTION

0

0 11dB Input Gain

0

1 8.5dB Input Gain

1

0 6dB Input Gain

1

1 3.5dB Input Gain

1

Stereo Decoder Muted

1

Stereo Decoder Off

1

Forced Mono

0

0

Noise Blanker Threshold 1 (NTB = 00)

1

0

Noise Blanker Threshold 2 (NTB = 10)

1

1

Noise Blanker Threshold 3 (NTB = 11)

0

Pilot Threshold High (Pth = 0)

1

Pilot Threshold Low (Pth = 1)

For example pilot threshold low, noise blanker threshold 2 (NTB = 10), Stereo decoder ON, 6dB input

gain is given by: 11000010.

12/16

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