TDA7541B Datasheet, PDF (19/77 Pages) STMicroelectronics – AM/FM car radio tuner IC with stereo decoder and intelligent selectivity system

TDA7541B
Electrical specifications and characteristics
Table 7. AM section (continued)
Item Symbol
Parameter
Test conditions
24.4 g_AGC Control slope
24.5
II₅₇I Max. AGC charge current
24.6
II₅₇I Max. AGC charge current
24.7
V₅₇ Max. AGC output voltage
24.8
V₅₇ Min. AGC output voltage
25. AM audio output
normal mode
Seek mode
normal mode
V₄₇ = 100 dBµ
V₄₇ = 20 dBµ
25.1
V₄₃ Audio output voltage
25.2
THD Total harmonic distortion
25.3
25.4 R_OUT Output impedance
26. IF noise blanking
V₅₆ = 90 dBµ, m = 30 %,
f_mod = 1KHz
V₅₆ = 90 dBµ, m = 30 %,
f_mod = 1 kHz
V₅₆ = 90 dBµ, m = 80%,
f_mod = 1 kHz
-
26.1
t_bl
Min. blanking time
-
26.2
t_bl
Max. blanking time
-
26.3
V_th Min internal threshold
-
26.4
V_th Max. internal threshold
-
26.5 V_thstep Threshold step
-
1. Can be reached in application circuit, not measured.
Min. Typ. Max. Unit
-
5
- µA/V
- 125 -
μA
-
5
-
μA
4.6 4.8 -
V
- 0.2 0.5 V
170 200 230 ^mVRM
S
- 0.3 0.5
%
- 0.5 0.9
20 25 30 Ω
-
8
-
μs
- 17 -
μs
- 50 - mV
- 187.5 - mV
- 12.5 - mV
3.3.4
Stereo decoder section
T_amb = 25 °C, V_CC1 = V_CC2 = V_CCMIX1 = V_CCVCO = V_CCIF = 8.5 V, f_Xtal = 10.25 MHz,
V_MPX = 500 mV_rms mono, f = 1 kHz, de-emphasis τ = 50 µs, in application circuit, unless
otherwise specified.
Table 8. Stereo decoder section
Item Symbol
Parameter
27. Stereo decoder
27.1
27.2
27.3
27.4
27.5
27.6
V_in MPX input level
R_in
G_STD
G_STDWB
SVRR
Input resistance
Stereo decoder gain
Stereo decoder gain
Supply voltage ripple
rejection
Test conditions
-
WBON = 1
-
-
Weather band mode
V_ripple = 100 mV, f = 1 kHz
Min. Typ. Max. Unit
- 0.5 0.93
V_rms
- 0.05 0.06
80 100 120 kΩ
2 2.5 3
dB
23 26 27
dB
-
60
-
dB
Doc ID 16048 Rev 1
19/77