TDA7529 Datasheet, PDF (22/60 Pages) STMicroelectronics – RF front-end for AM/FM DSP car-radio with IF sampling

Electrical specifications
TDA7529
Table 12. AM - section (continued)
Symbol
Parameter
Test Condition, Comments Min
Typ
Max
Fast attack time constant
Time constant
active in case of overdrive
(more than 7dB)
Range, mode T1
Range, mode T2
Range, mode T3
0.05
0.5
5
0.5-50
2.5-250
12.5-
1250
Units
ms
ms
ms
ms
4.6
IF - section
Table 13. IF - section
Symbol
Parameter
Test Condition, Comments Min
Typ
Max Units
IF AMPLIFIER
Input 1-3 (FM,HD,AM), min.
23
25
27
Grange Gain range
Input 1-3 (FM,HD,AM), max
36
38
40
dB
Input 4 (HD-Radio AM), min. 15
17
19
Input 4 (HD-Radio AM), max 29
31
33
Gstep
Gain step
3 bit control
1.5
2
2.5
dB
ΔAGC
AGC range
AGC steps
2-bit control
16.5
18
19
dB
5.2
6
6.6
Rin_input1 Input impedance input 1 FM –input @ 10.7MHz
230
330
450
W
Rin_input2
Input impedance input 2
HD-Radio FM input @
10.7MHz
2.2
2.9
3.6
kΩ
Rin_input3 Input impedance input 3 AM input @ 10.7MHz
7
8.2
10
kΩ
Rin_input4
Input impedance input 4
HD-Radio AM input @
10.7MHz
7
8.7
11
kΩ
Rout
Differential output
impedance
15
W
Vout_max Max. output voltage
115
117 dBµV
Gain, load
Gain variation in loaded
conditions
10pF between each IFAMP
outputs and GND, 10kΩ
differential load
0.5
dB
IIP3,load
IIP3 decrease in loaded
conditions
10pF between each IFAMP
outputs and GND, 10kΩ
differential load
1
dB
input stage 1-3, @ 25dB gain 119
122
IIP3
3^rd order intercept point
input stage 4, @ 17dB gain
130
133
dBµV
input stage 1-3
142
IIP2
2^nd order intercept point
input stage 4
154
dBµV
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