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TDA8741 Datasheet, PDF (10/24 Pages) NXP Semiconductors – Satellite sound circuit with noise reduction | |||
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Philips Semiconductors
Satellite sound circuit with noise reduction
Product speciï¬cation
TDA8741; TDA8741H
AC CHARACTERISTICS
All voltages referenced to ground at pins 9 and 34 (4 and 30). Measured in test circuit Fig.4; VP = 12 V; Tamb = 25 °C;
fMOD = 1 kHz; fOM = 6.5 MHz; âfM = 46 kHz; âfS1 = âfS2 = 27 kHz (reference levels); fOS1 = 10.7 MHz;
fOS2 = 10.52 MHz; HF level at pin 18 (14): 40 mV (RMS); HF level at pins 8 and 16 (3 and 11): 20 mV (RMS);
MCS = logic 0 [V7 (V2) = 0 V]; SCD = logic 0 [V11 (V6) = 0 V]; unless otherwise speciï¬ed.
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
Main channel - HF input pin 18 (14) and limiter
VIN3(rms)
VIN3(rms)
RIN3
input sensitivity (RMS value)
input signal level (RMS value)
input resistance
S/N(A) = 40 dB
Main channel - PLL FM demodulator and DC decoupling ampliï¬er
fCCO
âfOM
free-running frequency
lock range of PLL
MCS = logic 1
note 1
MCS = logic 1; note 1
RCDM
output resistance for 50 µs
de-emphasis pin 20 (16)
VCDM
âVCDM
output voltage pin 20 (16)
spread of PLL output voltage
over lock range pin 20 (16)
RCCM
input resistance of output
ampliï¬er pin 21 (17)
â
1.0 2.0 mV
â
â
200 mV
â
15 â
kâ¦
â
6.5 â
MHz
â
10.7 â
MHz
5.5 â
7.5 MHz
10.0 â
11.5 MHz
1.24 1.5 1.7 kâ¦
â18.5 â16.0 â14.5 dBV
â
â
±1 dB
95 150 200 kâ¦
Main channel - overall performance (output selector in position 4)
VOM,OR,OL
output voltage pins 23, 24 and all PLLs locked
25 (19, 20 and 21)
â9 â6
THD
total harmonic distortion
all PLLs locked
â
0.1
S/N(A)
signal-to-noise ratio
A-weighted;
all PLLs locked
62 70
V--V---O-O---M-M---(--(1-1--5---k-k-H-H--z-z-)--)-
15 kHz frequency response
no de-emphasis
with respect to 1 kHz pin 23 (19) connected
â0.5 0
ROM,OR,OL
output resistance pins 23, 24
and 25 (19, 20 and 21)
92 125
αS/M
crosstalk attenuation from
secondary channels to main
note 2
â
74
MUTEatt
mute attenuation
output selector in
position 7
74 â
SVRR
supply voltage ripple rejection VRR = 100 mV; fi = 70 Hz â
35
Secondary channels 1 and 2 - HF inputs pins 8 and 16 (3 and 11) and limiters
VIN1,IN2(rms)
Vi(rms)
RIN1,IN2
input sensitivity (RMS value)
input signal level (RMS value)
input resistance
S/N(A) = 40 dB
â
0.8
â
â
280 330
â4 dBV
0.5 %
â
dB
+0.5 dB
150 â¦
â
dB
â
dB
â
dB
1.5 mV
200 mV
380 â¦
October 1994
10
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