TDA7529 Datasheet, PDF (21/60 Pages) STMicroelectronics – RF front-end for AM/FM DSP car-radio with IF sampling

TDA7529
Electrical specifications
4.5
AM - section
Refer to application circuit in figure 3. V_CC = 4.7V to 5.35V; T_amb = -40 to +105°C; LW, MW
and SW bands; 74dBµV antenna level, unless otherwise specified. Antenna level
equivalence: 0dBµV = 1µVrms, all RF levels are intended as EMF.
Table 12. AM - section
Symbol
Parameter
Test Condition, Comments Min
Typ
Max Units
AM IMR Mixer and active balun
Gmix1
Δgmix1
Rin
Rout
Vin_max
Vnoise
IIP3
IIP2
IRR
IRR
Mixer conversion gain
Gain attenuation range
Input impedance
Output impedance
Min. external load
Max. output voltage
Input noise voltage
3^rd order intercept point
2^nd order intercept point
Image rejection ratio
Image rejection ratio
7.2
9
10.5
dB
controlled by IF-AGC
18
20
dB
5
6.5
9.5
kΩ
15
20
30
W
400
W
without clipping (unloaded)
122
dBµV
6
8.3 nV/√Hz
130
134
dBµV
159
dBµV
without gain/phase adjust
30
dB
with gain/phase adjust
40
45
dB
AM RF AGC
External capacitance for time constant from 1nF to 4700nF – time constant values are directly proportional to the
external capacitor value
Lthr
Mixer input referred
RF level threshold
min. setting
max setting
83
86
89
dBµV
98
101
104
threshold steps
4 bit control
0.5
1
1.5
dB
AGC control pin 1
Pin diode source current
10
mA
Logarithmic current
Min. voltage
AGC control pin 1 with 5µA
sink current
0.1
V
Isink
5µA sink current
5
10
µA
Pin diode source current in
constant current mode
1
mA
Max. voltage
AGC control pin 1
V_CC-
1.4
V_CC-1.2
V
Max. output voltage in GPO
mode
AGC control pin 2
V_DD-
0.3
V_DD
V
Min. output voltage
AGC control pin 2
0.3
V
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