TDA7501_07 Datasheet, PDF (12/29 Pages) STMicroelectronics – Line driver for digital car radio Signal processor (DSPLD)

Description of the input part
TDA7501
3.4
Transfer function of the AM/FM level inputs
In the TDA7501 two level shift stages convert a tuner level (DC) signal to a unipolar output
signal with respect to the Codec Interface reference, that is 1.65V.
The FM level input can be programmed to a signal range of either 0 to 5V (Lo range) which
is the default, or 0 to 6V (Hi range). The AM level input is fixed to the lower 0 to 5V input
range.
For the programming of the FM level input range see the programming section.
Figure 9. AM/FM level inputs transfer function (DC)
Vout
(V)
2.65
2.30
2.15
1.90
1.65
D00AU1204
LO RANGE
HI RANGE
0 1 2 3 4 5 Vin(V)
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