TDA7529 Datasheet, PDF (23/60 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
Vnoise_input 2 IN2 input noise voltage
Vnoise_input 3 IN3 input noise voltage
Vnoise_input 4 IN4 input noise voltage
@ source impedance 330Ω ·
noiseless, @31dB gain
@ source impedance 470Ω ·
noiseless, @ 31dB gain, with
external 560Ω input
termination resistor
@ source impedance 2.2kΩ ·
noiseless, @ 29dB gain, with
external 2.7kΩ input
termination resistor
@ source impedance 2.2kΩ ·
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
Time constant attack,
range
FM: asym. mode U1
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
Time constant decay,
range
FM: asym. mode U1 / U2
AM: sym. mode S1
AM: sym. mode S2
2-100
ms
2-100
ms
20-1000
ms
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