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TDA7420 Datasheet(PDF) 19 Page - STMicroelectronics

Part # TDA7420
Description  MULTIFUNCTIONAUDIO PROCESSOR
PDF  29 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7420 Datasheet(HTML) 19 Page - STMicroelectronics

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NOISE BLANKER 1
MSB
LSB
FUNCTION
D7
D6
D5
D4
D3
D2
D1
D0
Noise Blanker Threshold Vpeak = 0.9V
000
Vth = 30mV
001
Vth = 35mV
010
Vth = 40mV
011
Vth = 45mV
100
Vth = 50mV
101
Vth = 55mV
110
Vth = 60mV
111
Vth = 65mV
Noise Blanker Noise Adjusted Threshold Vpeak = 1.4V
00
Vth = 140mV
01
Vth = 180mV
10
Vth = 240mV
11
Vth = 280mV
Gain of Overdeviation Detector Vpeak with MPX of 75KHz Deviation
0
0
Detector Off
0
1
Vpeak = 1.2Vop
1
0
Vpeak = 2.0Vop
1
1
Vpeak = 2.8Vop
STEREO DECODER
MSB
LSB
FUNCTION
D7
D6
D5
D4
D3
D2
D1
D0
Input Gain
0
0
1.5dB Input Gain
0
1
4.0dB Input Gain
1
0
6.5dB Input Gain
1
1
9dB Input Gain
Roll Off Adjustement
0
0
1
20.2%
0
1
0
21.9%
0
1
1
23.7%
1
0
0
25.5%
1
0
1
27.3%
1
1
0
29.2%
111
31%
0
Deemph. Time Constant 75
µs
1
Deemph. Time Constant 50
µs
1
Forced Mono
0
Stereo Enabled
0
Pilot Threshold High
1
Pilot Threshold Low
TDA7420
19/29



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