tda8296 NXP Semiconductors, tda8296 Datasheet - Page 33
tda8296
Manufacturer Part Number
tda8296
Description
Tda8296 Digital Global Standard Low If Demodulator For Analog Tv And Fm Radio
Manufacturer
NXP Semiconductors
Datasheet
1.TDA8296.pdf
(87 pages)
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TDA8296
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TDA8296
Product data sheet
Table 26.
Legend: * = default value.
Table 27.
Legend: * = default value.
Table 28.
Legend: * = default value.
Bit
6 to 0 T_IF_AGC_SPEED[6:0] R/W
Bit
7 to 4 UP_LIM[3:0]
3 to 0 LOW_LIM[3:0] R/W
Bit
7
6 to 0 T_FORCE_VAL[6:0]
Symbol
Symbol
Symbol
T_FORCE
T_IF_AGC_SET register (address 15h) bit description
T_IF_AGC_LIM register (address 16h) bit description
T_IF_AGC_FORCE register (address 17h) bit description
Digital global standard low IF demodulator for analog TV and FM radio
All information provided in this document is subject to legal disclaimers.
Access Value
R/W
Rev. 1 — 3 March 2011
Access Value
R/W
R/W
Access Value
1111*
0000*
0*
1
3Fh*
XXh
Description
The tuner IF AGC output voltage can be limited to
interface with concepts having power supply < 3.3 V.
UP_LIM determines the upper limit from
to FS (= Fh). The format is straight binary.
LOW_LIM determines the lower tuner IF AGC output
limit from 0 (= 0h) to
straight binary.
000 0001
000 0010
000 0100
000 1000*
001 0000
010 0000
100 0000
set upper limit to maximum
set lower limit to minimum
Description
the tuner IF AGC output voltage can be forced
externally to a fixed voltage, determined by
T_FORCE_VAL
T_FORCE_VAL determines the tuner IF AGC
forced value. So the tuner IF AGC can be fixed to
a certain value for debugging purposes. Format is
straight binary.
tuner IF AGC normal operation
tuner IF AGC output voltage determined by
T_FORCE_VAL
0.5 × V
don’t care if T_FORCE = 0
Description
T_IF_AGC_SPEED determines the tuner
IF AGC loop speed
−18 dB nominal
−12 dB nominal
−6 dB nominal
nominal speed (determined by the tuner
IF control slope)
+6 dB nominal
+12 dB nominal
+18 dB nominal
DD(3V3)
1
∨
, i.e. 1.65 V nominally
2
FS (= Fh). The format is
…continued
TDA8296
© NXP B.V. 2011. All rights reserved.
1
∨
2
FS (= 0h)
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