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U4468B Datasheet, PDF (5/11 Pages) ATMEL Corporation – Quasi-split Sound Circuit and AM Demodulator IC
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U4468B
Electrical Characteristics
VS = +5 V, Tamb = +25°C; reference point pin 13, unless otherwise specified.
Parameters
Test Conditions
Symbol
Min.
Typ.
Max.
Unit
DC Supply (Pin 14)
Supply voltage
Supply current
IF Input (Pins 1, 2)
Vin =10 mV or V3 = 2 V
VS
4.5
5.0
9.0
V
IS
40
mA
Minimum IF input signal
Maximum IF input signal
Input impedance
Input capacitance
SIF-AGC (Pin 3)
Output signal: -3 dB
Output signal: +1 dB
(1)
(1)
vin
50
vin
70
100
Rin
1.2
Cin
2
µVrms
mVrms
kW
pF
IF gain control range
AGC capacitor
FPLL and VCO (Pins 5, 8, and 9)
Gv
60
65
dB
CAGC
4.7
µF
Maximum oscillator frequency
Vision carrier capture range
Oscillator drift (free running) as
function of temperature
Standard Switch (Pin 7)
For carrier generation
fVCO = 38.9 MHz
CVCO = 6.2 pF
DTamb = 55°C,
fVCO = 38.9 MHz
CVCO = 6.2 pF(2)
fVCO
Dfcap
70
±1.5
±2
MHz
MHz
Df/DT
-0.3
%
Switching voltage for mode 1:
FM/NICAM sound
Peak value control(3)
Vsw1
2.0
VS
V
Switching voltage for mode 2:
AM sound
Average level control
Vsw2
0
1.5
V
Switching current
AM Mute Switch (Pin 10)
Isw
±100
µA
Switching voltage
Switching voltage
Switching current
Intercarrier Output (Pin 12)(4)
AM output active
AM output switched off
Vmute1
Vmute2
Imute
open
0
1.5
V
-100
µA
DC output voltage
Output resistance
Intercarrier output signal
(1)
vin = 10 mV
5.5 MHz output signal
VDC
2
V
Rout
200
W
Vout
100
150
mVrms
Intercarrier bandwidth
-1 dB
-3 dB
B
TBD
TBD
MHz
MHz
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 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 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.
5
4777A–TVVCR–01/04
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