TDA7529_11 Datasheet, PDF (22/61 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
active in case of overdrive
(more than 7dB)
0.05
0.5
5
-
Time constant
Range, mode T1
Range, mode T2
Range, mode T3
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
Ω
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
-
Ω
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
dBµV
input stage 4, @ 17dB gain
130
133
-
input stage 1-3
IIP2
2^nd order intercept point
input stage 4
142
-
154
-
-
dBµV
-
22/61
Doc ID 13311 Rev 4