U4468B ATMEL Corporation, U4468B Datasheet - Page 5

• Manufacturer Part Number: U4468B
• Description: Quasi-split Sound Circuit And Am Demodulator Ic
• Manufacturer: ATMEL Corporation

Electrical Characteristics
V
4777A–TVVCR–01/04
Parameters
DC Supply (Pin 14)
Supply voltage
Supply current
IF Input (Pins 1, 2)
Minimum IF input signal
Maximum IF input signal
Input impedance
Input capacitance
SIF-AGC (Pin 3)
IF gain control range
AGC capacitor
FPLL and VCO (Pins 5, 8, and 9)
Maximum oscillator frequency
Vision carrier capture range
Oscillator drift (free running) as
function of temperature
Standard Switch (Pin 7)
Switching voltage for mode 1:
FM/NICAM sound
Switching voltage for mode 2:
AM sound
Switching current
AM Mute Switch (Pin 10)
Switching voltage
Switching voltage
Switching current
Intercarrier Output (Pin 12)
DC output voltage
Output resistance
Intercarrier output signal
Intercarrier bandwidth
Notes:
S
= +5 V, T
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 an 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 SC
5. Sound carrier SC = 32.4 MHz, modulated with f
PC/SC
amb
= +25°C; reference point pin 13, unless otherwise specified.
1
=13 dB; PC/SC
(4)
2
= 20 dB; PC unmodulated (equivalent to sync peak level).
Test Conditions
V
Output signal: -3 dB
Output signal: +1 dB
(1)
(1)
For carrier generation
f
C
DT
f
C
Peak value control
Average level control
AM output active
AM output switched off
(1)
v
5.5 MHz output signal
-1 dB
-3 dB
VCO
VCO
in
in
VCO
VCO
amb
= 10 mV
=10 mV or V
= 38.9 MHz
= 38.9 MHz
= 6.2 pF
= 6.2 pF
= 55°C,
(2)
3
= 2 V
(3)
mod
1
= 33.4 MHz, SC
= 1 kHz, m = 54%; v
2
= 33.16 MHz;
Symbol
V
V
Df/DT
C
Df
V
V
f
I
V
R
V
in
R
C
VCO
mute1
mute2
mute
V
G
I
v
v
I
AGC
B
sw1
sw2
sw
DC
out
S
cap
out
in
in
S
in
in
= 10 mV.
v
Min.
±1.5
100
4.5
2.0
70
60
70
0
0
±100
open
Typ.
-100
TBD
TBD
100
150
5.0
1.2
4.7
40
50
65
±2
2
2
Max.
-0.3
200
9.0
1.5
1.5
V
U4468B
S
mV
mV
µV
MHz
MHz
MHz
MHz
Unit
mA
kW
dB
µA
µA
pF
µF
%
V
V
V
V
V
W
rms
rms
rms
5