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TDA7512F Datasheet(PDF) 41 Page - STMicroelectronics

Part # TDA7512F
Description  FM car-radio tuner IC with intelligent selectivity system (ISS)
PDF  45 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7512F Datasheet(HTML) 41 Page - STMicroelectronics

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TDA7512F
Block diagrams
Doc ID 12668 Rev 2
41/45
Table 34.
Block diagram quality detection principle (without overdeviation
correction)
Signal
Low
High
ac
No adjacent channel
Adjacent channel present
ac+
No strong adjacent channel
Adjacent channel higher as ac
sm
Fieldstrength higher as softmute
threshold
Fieldstrength lower as softmute
threshold
dev
Deviation lower as threshold DWTH
Deviation higher as threshold DWTH
dev+
Deviation lower as threshold
DTH*DWTH
Deviation higher as threshold
DTH*DWTH
inton
ISS filter off by logic (wide)
ISS filter on by logic
int80
ISS filter 120kHz (mid)
ISS filter 80kHz (narrow)
Table 35.
Input signals modes
Input signals
Mode 1
Mode 2
0ac
0ac+
0sm
0dev
0dev+
0inton
0int80
0Function
0inton
0int80
0Function
0
0000
0
0
wide
0
0
wide
0
0010
0
0
wide
0
0
wide
0
0011
0
0
wide
0
0
wide
0
0100
1
1
narrow
1
1
narrow
0
0110
0
0
wide
1
0
mid
0
0111
0
0
wide
0
0
wide
1
0000
1
1
narrow
1
0
mid
1
1000
1
1
narrow
1
1
narrow
1
0010
1
0
mid
1
0
mid
1
1011
1
0
mid
1
1
narrow
1
0100
1
1
narrow
1
1
narrow
1
1100
1
1
narrow
1
1
narrow
1
0110
1
0
mid
1
0
mid
1
1110
1
0
mid
1
1
narrow
1
0111
1
0
mid
1
0
mid
1
1111
1
0
mid
1
1
narrow



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