TDA7514 STMicroelectronics, TDA7514 Datasheet - Page 22

• Manufacturer Part Number: TDA7514
• Description: SINGLE-CHIP FM/AM TUNER
• Manufacturer: STMicroelectronics

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TDA7514
Table 8. Quality Actuators (continued)
22/74
ATT
Symbol
MAX/MIN
The maximum high cut attenuation can be selected via I
NOTES:
- The maximum high cut frequency setting can make the maximum attenuation lower than this. But then
you effectively have a fixed rolloff filter, because the max high cut frequency will keep the hcc filter
frequency from moving any higher, and the max high cut attenuation will keep the hcc filter frequency
from moving any lower.
- Also, there is an alternative way of setting the maximum high cut attenuation, but only if a maximum
high cut frequency does not need to be selected. The FAST3 can be set to limit the minimum high cut
frequency [addr 8C, subaddr 25d, bit D6], then any of the 32 high cut frequencies can be selected to
limit the max attenuation.
Max/Min high Cut
Attenuation(at 10kHz)@
HCC range 20kHz~4kHz
Max/Min high Cut
Attenuation(at 10kHz)@
HCC range 10kHz~2kHz
Fixed Rolloff
Parameter
00
01
10
11
00
01
10
11
There are two ways to set the HCC filter to a fixed filter (there will be no
dynamic movement of the filter). Both of these will set the filter to the
corner frequency selected in the Max/Min High Cut Frequency [addr
8C, subaddr 25d, bits D4 to D0].
1) Set the FAST3 to Fixed High Cut ON [addr 8C, subaddr 25d, bit D7].
2) Turn High Cut OFF [addr 8C, subadress 23, bit D0] and Fix
Maximum High Cut Frequency [addr 8C, subaddr 25d, bit D6]
Test Condition
2
C [addr 8C, subaddr 23d, bits D2 to D1].
Min.
-11.5
-12.4
Typ.
-1.8
-4.4
-6.2
-7.0
-5.6
-9.3
Max.
Unit
dB
dB
dB
dB
dB
dB
dB
dB