TDA8190 Datasheet, PDF (5/11 Pages) STMicroelectronics – TV SOUND CHANNEL WITH DC CONTROLS

TDA8190
TEST CONDITIONS (unless otherwise specified)
VS = 24V, QO = 60, fO = 4.5MHz, VIN = 1mV, fm = 400Hz, ∆f = ±25kHz, P1 = 12kΩ, RL = ∞, S1 = on
Figure 1 : Relative Audio Output Voltage and
Output Noise versus Input Signal
Vo (dB)
S+N
N (dB)
0
-2
-4
-6
-8
-10
-12
-14
-16 _{0dB = 4V}
-18
10
10 ²
0
Vo
10
20
30
40
S+N
50
N
60
70
V_i (µV) ₈₀
90
10 ³
10 ⁴
10 ⁵
Figure 2 : Output Voltage Alternation versus DC
Volume Control Resistance (a) or ver-
sus DC Volume Control Voltage (b)
k (dB)
0
∆f : Set for V = 0dB
20
with P2 = 0Ω ( V_c = 0V)
40
60
V_C
80
P2
P2 (kΩ)
V_C (V)
0 2 4 6 8 10 12 14 16 18 20
0 0.4 0.8 1.2 1.6 2 2.4 2.8 3.2 3.6 4
Figure 3 : DC Tone Control Cut-off the High
Audio Frequencies for some Values
of Resistance adjusted by P1
Figure 4 : Amplitude Modulation Rejection
versus Input Signal
-0 ^{Vo (dB)}
P1 = 12kΩ
AMR (dB)
70
m = 0.3
60
-10
P1 = 5kΩ
P1 = 2kΩ
P1 = 100Ω
0dB = 4V
50
40
S1 : off
-20 _{P2 = 0Ω R L =}
V₁₀ = set for V_O = 0dB
with f_A = 10Hz
-30
10 ²
10 ³
10 ⁴
f_A (Hz)
10 ⁵
30
20
10
0
10
Vi (µV)
10 ²
10 ³
10 ⁴
10 ⁵
Figure 5 : ∆AMR versus Timing Frequency
Change
∆AMR (dB)
2 m = 0.3
1
0
Vi = 10mV
-1
-2
Vi = 1mV
-3
-4
δ_fo (kHz)
-5
-40 -30 -20 -10 0 10 20 30
Figure 6 : Recovered Audio Voltage versus Un-
loaded Q-factor of the Detector Coil
260 ^{V9 (mV)}
∆f = 7.5kHz
220 ^{P2 = 12kΩ}
180
140
100
60
Qo
20
10 20 30 40 50 60 70
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