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TDA3857 Fiches technique(PDF) 7 Page - NXP Semiconductors

No de pièce TDA3857
Description  Quasi-split sound processor with two FM demodulators
Download  14 Pages
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Fabricant  PHILIPS [NXP Semiconductors]
Site Internet  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TDA3857 Fiches technique(HTML) 7 Page - NXP Semiconductors

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June 1994
7
Philips Semiconductors
Product specification
Quasi-split sound processor with two FM demodulators
TDA3857
QL
Q-factor of resonance circuit
Qo =90
40
V10, 11
DC voltage (pins 10 and 11)
VP − 1 −
V
Intercarrier mixer output (pin 15)
Vo (RMS)
output signal for 5.5 MHz (RMS value)
71
95
125
mV
output signal for 5.74 MHz (RMS
value)
32
43
56
mV
B
IF bandwidth
−1 dB
6
8.5
MHz
−3dB
7
10
MHz
VVID/V15
residual video AM on intercarrier
note 1
310
%
VVC (RMS)
residual vision carrier (RMS value)
1st/2nd harmonic
(38.9/77.8 MHz)
0.5
1
mV
R15
output resistance (emitter follower)
1 mA emitter current
30
−Ω
Io
allowable AC output current (pin 15)
−−
±0.7
mA
I15
allowable DC output current
−−
−2mA
V15
DC voltage
LC-circuit at pin 10, 11
adjusted to minimum
video content at pin 15
1.5
1.75
2.0
V
Limiting amplifiers (pins 13 and 17)
Vi (RMS)
minimum input signal (RMS value)
−3 dB AF signal
300
450
µV
maximum input signal (RMS value)
200
−−
mV
R13, 17
input resistance
450
560
700
V13, 17
DC voltage
0
V
Vi (RMS)
level detector threshold for no muting
(RMS value, pin 17)
only 5.74 MHz channel
0.8
1.2
1.7
mV
∆V
i
hysteresis of level detector
4
7
12
dB
FM1 and FM2 demodulators
Measurements with FM IF input signals of 5.5 MHz and 5.74 MHz with Vi IF (RMS) = 10 mV (fmod = 1 kHz, deviation
∆f= ±50 kHz) at pins 13 and 17 without ceramic filters, Rs =50 Ω.
De-emphasis 50
µs.
QL-factor = 11 for resonant circuits at pins 4-5 and 8-9 (including IC).
VIC (RMS)
intercarrier signals
(RMS values, pins 4-5 and 8-9)
100
mV
V
DC voltage (pins 4, 5, 8 and 9)
1.8
V
Vo (RMS)
AF output signals
(RMS values, pins 6 and 7)
0.84
0.95
1.07
V
∆V
o
difference of AF signals between
channels (pins 6 and 7)
note 2
−−
1dB
R6, 7
output resistance
75
100
130
V6, 7
DC voltage
1.8
2.1
2.4
V
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT


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