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PDF U4488B Data sheet ( Hoja de datos )
| Número de pieza | U4488B | |
| Descripción | Quasi-Split Sound Circuit and AM Demodulator | |
| Fabricantes | TEMIC Semiconductors | |
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U4488B
Quasi-Split Sound Circuit and AM Demodulator
Description
The U4488B is an integrated bipolar circuit for full multi-
standard sound IF signal processing in TV/VTR and
Multimedia applications. It supplies AM signals as well
as FM/NICAM sound IF signals and thus allows the de-
sign of a universal sound IF module for various
applications. The U4488B has the same performance like
the U4468B, with the additional feature of a second sym-
metrical IF input.
Features
D 5-V supply voltage; low power consumption
D Gain-controlled 3-stage wideband IF amplifier
D Active carrier generation by FPLL principle
(frequency-phase-locked-loop) for true quadrature
demodulation
Block Diagram
D Complete alignment-free AM demodulator
D Switchable amplitude detector for gain control, which
operates as a peak detector for FM sound and as a
mean level detector for AM sound
D Two symmetrical IF inputs
IFFM
IFAM
IF1/IF2
S3
11
1
2
VS
4 14
REF
IF-Amp
15 IF-Switch
16
Loop
filter
FPLL
5
0° VCO
90°
8
9
VCO
12
Intercarrier
(FM)
Mean
3
AGC
13
Ordering Information
Extended Type Number
U4488B
6
Peak
level
7
IF AGC
Mean/peak
S1
AM-Det
10
Mute S2
Figure 1. Block diagram
AF(AM)
13789
Package
DIP16
Remarks
TELEFUNKEN Semiconductors
Rev. A2, 15-Jan-98
Preliminary Information
1 (9)
1 page  
U4488B
Electrical Characteristics (continued)
VS = + 5 V, Tamb = + 25°C; reference point Pin 13, unless otherwise specified
Parameters
Test Conditions / Pins Symbol Min. Typ. Max.
Intercarrier output
(Pin 12)
(see note 4)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁDC output voltage
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁOutput resistance
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁIntercarrier output signal
(See note 1)
vin = 10 mV
5.5 MHz output signal
VDC
2
Rout 200
Vout 100 150
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁIntercarrier bandwidth
–1 dB
B tbd
–3 dB
tbd
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁWeighted signal-to-noise ratio
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ(CCIR 468)
B/G mod. VIF signal:
vin = 10 mV;
FM dev. = ±27 kHz;
fmod = 1 kHz;
tested with U2860B;
Black screen: Channel 1/2
Color bar: Channel 1/2
60/58
58/56
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁRipple rejection
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁAllowable AC output peak
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁcurrent
Tested from Pin 14 to 12
(see note 1)
RR 35
IAC
" 0.7
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁAllowable DC output current
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁAF output – AM
(Pin 6)
IDC
(see note 5)
–2
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁDC output voltage
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁOutput resistance
AF output signal
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁAF bandwidth
(See note 1)
m = 54%
–3 dB
VDC
Rout
voAF
B
2.2
150
500
tbd
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁTotal harmonic distortion
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁWeighted signal-to -oise ratio
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ(CCIR 468)
Ripple rejection
m = 54%
fmod = 1 kHz, 12.5 kHz
Reference: m = 54%;
fmod = 1 kHz
Tested from Pin 14 to 6
THD
1
S/N 56
RR 28
2
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁAllowable AC output peak
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁcurrent
(see note 1)
IAC
" 0.3
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁAllowable DC output current
IDC –1
Unit
V
W
mVrms
MHz
MHz
dB
dB
dB
mA
mA
V
W
mVrms
kHz
%
dB
dB
mA
mA
Notes
1. This parameter is given as an application information and is not tested during production
2. The oscillator drift is related to the picture carrier frequency, with external temperature compensated LC circuit
3. Without external control voltage (Pin 7 open), the IC automatically operates in mode 1
4. Picture carrier PC = 38.9 MHz; sound carrier SC1 = 33.4 MHz, SC2 = 33.16 MHz;
PC/SC1 =13 dB; PC/SC2 = 20 dB; PC unmodulated (equivalent to sync peak level)
5. Sound carrier SC = 32.4 MHz, modulated with fmod = 1 kHz, m = 54%; vin = 10 mV
TELEFUNKEN Semiconductors
Rev. A2, 15-Jan-98
Preliminary Information
5 (9)
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet U4488B.PDF ] | |
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