TDA7529_11 Datasheet, PDF (23/61 Pages) STMicroelectronics – RF front-end for AM/FM DSP car-radio with IF sampling

TDA7529
Electrical specifications
Table 13. IF - section (continued)
Symbol
Parameter
Test condition, comments Min
Typ Max Units
Vnoise_input 1 IN1 input noise voltage
@ source impedance 330Ω ·
noiseless, @31dB gain
-
@ source impedance 470Ω ·
Vnoise_input 2 IN2 input noise voltage
noiseless, @ 31dB gain, with
external 560Ω input
-
termination resistor
@ source impedance 2.2kΩ ·
Vnoise_input 3 IN3 input noise voltage
noiseless, @ 29dB gain, with
external 2.7kΩ input
-
termination resistor
@ source impedance 2.2kΩ ·
Vnoise_input 4 IN4 input noise voltage
noiseless, @ 24dB gain, with
external 2.7kΩ input
-
termination resistor
3.5
4.2 nV/√Hz
3.8
4.6 nV/√Hz
5
6.5 nV/√Hz
7
8.5 nV/√Hz
IF AGC
External capacitance for time constant from 10nF to 500nF in FM (asym. mode), from 100nF to 4700nF in AM (sym. mode)
– time constant values are directly proportional to the external capacitor value
FM, min. setting
88.5
91
93.5
FM, max setting
Lthr
IFAmp input referred
AM, min. setting
AM, max setting
99.5 101 103.5
dBµV
86.5
89
91.5
96.5
99 101.5
-
Threshold steps
-
1
1.5
2
dB
-
Fast attack mode in AM-
mode, range
active in case of overdrive
0.05
0.5
5
ms
FM: asym. mode U1
-
Time constant attack,
range
FM: asym. mode U2
AM: sym. mode S1
AM: sym. mode S2
10-500
µs
0.05-2.5
ms
-
-
2.0-100
ms
20-1000
ms
FM: asym. mode U1 / U2
2-100
ms
-
Time constant decay,
range
AM: sym. mode S1
-
2-100
-
ms
AM: sym. mode S2
20-1000
ms
Doc ID 13311 Rev 4
23/61