TDA7546 查看數據表（PDF） - STMicroelectronics

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TDA7546

Multichip module for TMC tuner applications

STMicroelectronics 

TDA7546

Software specifications

Table 19. Addr 8 quality ISS filter

MSB

LSB

d7 d6 d5 d4 d3 d2 d1 d0

Function

0 ISS filter control “ON”

1 ISS filter control “OFF”

0

Switch ISS filter “OFF”

1

Switch ISS filter “ON”

0

Switch “OFF” ISS filter 120KHz

1

0

Switch “ON” ISS filter 80KHz

Switch “OFF” ISS filter 30KHz for weatherband

1

Switch “ON” ISS filter 30KHz for weatherband

0

Disable TV offset for weather band

1

0 00

0 01

Enable TV offset for weather band (+4V)

discharge current1μA, charge current mid 74μA narrow124μA

discharge current3μA, charge current mid 72μA narrow122μA

0 10

0 11

discharge current 5μA, charge current mid 70μA narrow 120μA

discharge current 7μA, charge current mid 68μA narrow 118μA

- --

1 11

-

discharge current 15μA,charge current mid 60μA narrow 110μA

Table 20. Addr 9 quality detection adjacent channel

MSB

LSB

d7 d6 d5 d4 d3 d2 d1 d0

Function

0/1 Not valid

0

AC highpass frequency 100KHz

1

AC bandpass frequency 100KHz

0

AC gain 32dB

1

AC gain 38dB

000

001

AC wide band threshold 0.25V

AC wide band threshold 0.35V

010

AC wide band threshold 0.45V

-

-

-

-

111

AC wide band threshold 0.95V

00

01

AC narrow band threshold 0.0V

AC narrow band threshold 0.1V

10

AC narrow band threshold 0.2V

11

AC narrow band threshold 0.3V

43/68

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