U4468B Datasheet, PDF (6/11 Pages) ATMEL Corporation – Quasi-split Sound Circuit and AM Demodulator IC

Electrical Characteristics (Continued)
V_S = +5 V, T_amb = +25°C; reference point pin 13, unless otherwise specified.
Parameters
Test Conditions
Symbol
Min.
Typ.
Max.
Unit
Weighted signal-to-noise ratio
(CCIR 468)
Ripple rejection
B/G mod. VIF signal:
v_in =10 mV
FM deviation = ±27 kHz
f_mod = 1 kHz
Tested with U2860B
Black screen: channel 1/2
Color bar: channel 1/2
Tested from pin 14 to 12⁽¹⁾
60/58
dB
58/56
dB
RR
35
dB
Allowable AC output peak current
Allowable DC output current
AF Output - AM (Pin 6)
I_AC
±0.7
mA
I_DC
-2
mA
DC output voltage
Output resistance
AF output signal
AF bandwidth
(1)
m = 54%⁽⁵⁾
-3 dB⁽⁵⁾
V_DC
R_out
v_oAF
B
2.2
500
TBD
V
150
W
mV_rms
kHz
Total harmonic distortion
Weighted signal-to-noise ratio
(CCIR 468)
Ripple rejection
m = 54%
f_mod = 1 kHz, 12.5 kHz
Reference: m = 54%⁽⁵⁾
f_mod = 1 kHz
Tested from pin 14 to 6⁽¹⁾
THD
1
2
%
S/N
56
dB
RR
28
dB
Allowable AC output peak current
I_AC
±0.3
mA
Allowable DC output current
I_DC
-1
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 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 f_mod = 1 kHz, m = 54%; v_in = 10 mV.
6 U4468B
4777A–TVVCR–01/04