TDA7705TR datasheet(30/42 Pages) STMICROELECTRONICS

Part #	TDA7705TR

Description	Highly integrated tuner for AM/FM car radio

PDF	42 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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30 / 42 page

Front-end processing

TDA7705

30/42

Doc ID 15938 Rev 9

Front-end processing

All the parameters in this section refer to the programmability of the FE part of the device

(registers). The part of the registers that are not described here have either fixed values or

values written by the tuner drivers, and are described in the proper technical documentation.

Table 22.

MSB

LSB

23 22 21 20 19 18 17 16 15 14 13 12 11 10

AM mixer input selector

1 input #1

0 input #2

AM PIN diode

internal

external

AM AGC mode

LNA and PIN diode

PIN diode only

AM AGC time constant

slow (125 ms with 1 µF)

medium (25 ms with 1 µF)

fast (5 ms with 1 µF)

AM AGC threshold @ mixin

90 dBµV

91 dBµV

92 dBµV

93 dBµV

90 dBµV

89 dBµV

88 dBµV

87 dBµV

AM AGC attack time constant

normal

fast

TDA7705TR Datasheet(PDF) 30 Page - STMicroelectronics