tda8742 NXP Semiconductors, tda8742 Datasheet - Page 10

• Manufacturer Part Number: tda8742
• Description: Satellite Sound Circuit With Noise Reduction
• Manufacturer: NXP Semiconductors

Philips Semiconductors
AC CHARACTERISTICS
All voltages referenced to ground at pins 9 and 34 (4 and 30). Measured in test circuit Fig.4; V
f
f
MCS = logic 0 [V
October 1994
MOD
OS2
Main channel - HF input pin 18 (14) and limiter
V
V
R
Main channel - PLL FM demodulator and DC decoupling amplifier
f
R
V
R
Main channel - overall performance (output selector in position 4)
V
UBM
THD
S/N(A)
R
MUTE
SVRR
V
------------------------------ -
CCO
V
f
V
S/M
IN3(rms)
IN3(rms)
CDM
OM,OR,OL
Satellite sound circuit with noise reduction
IN3
CDM
CCM
OM,OR,OL
OM
OM 15 kHz
OM 1 kHz
CDM
= 10.7 MHz; HF level at pin 18 (14): 40 mV (RMS); HF level at selected secondary inputs: 20 mV (RMS);
= 1 kHz; f
att
SYMBOL
OM
7
= 6.5 MHz; f
(V
2
) = 0 V]; SCD = logic 0 [V
input sensitivity (RMS value)
input signal level (RMS value)
input resistance
free-running frequency
lock range of PLL
output resistance for 50 s
de-emphasis pin 20 (16)
output voltage pin 20 (16)
spread of PLL output voltage
over lock range pin 20 (16)
input resistance of output
amplifier pin 21 (17)
output voltage pins 23, 24 and
25 (19, 20 and 21)
unbalance voltage outputs
pins 23 to 25 (19 to 21)
output resistance pins 23, 24
and 25 (19, 20 and 21)
crosstalk attenuation from
secondary channels to main
mute attenuation
supply voltage ripple rejection
total harmonic distortion
signal-to-noise ratio
15 kHz frequency response
with respect to 1 kHz pin 23
(19)
M
= 46 kHz; f
PARAMETER
S1
11
= f
(V
6
) = 0 V]; unless otherwise specified.
S2
= 27 kHz (reference levels); f
10
S/N(A) = 40 dB
MCS = logic 1
note 1
MCS = logic 1; note 1
all PLLs locked
output selector in
position 4
note 2
output selector in
position 7
V
all PLLs locked
A-weighted; all PLLs
locked
no de-emphasis
connected
RR
= 100 mV; f
CONDITIONS
i
= 70 Hz
TDA8742; TDA8742H
OS1
5.5
10.0
1.24
95
62
92
74
MIN.
= 10.52 MHz;
18.5
9
0.5
0.5
P
1.0
15
6.5
10.7
1.5
150
0.1
70
0
125
74
35
= 12 V; T
TYP.
16.0
6
Product specification
MAX.
2.0
200
7.5
11.5
1.7
200
+0.5
0.5
150
14.5 dBV
1
4
0.5
amb
= 25 C;
mV
mV
k
MHz
MHz
MHz
MHz
k
dB
k
dBV
dB
%
dB
dB
dB
dB
dB
UNIT