SDA5275P Datasheet, PDF (18/30 Pages) Siemens Semiconductor Group – ICs for Consumer Electronics MEGATEXT and MEGATEXT PLUS ICs

SDA 5273 / 75
SDA 5273-2 / 75-2
Characteristics (cont’d)
T_A = 0 to 70 °C
Parameter
Symbol Limit Values Unit Test Condition
min. typ. max.
CVBS-Input and ADC (V_REF = 3 V)
Input leakage current
I_l
Input capacitance
C_P
Ext. coupling capacitance
C_CPL
Sensitivity of clamp level to
current leakage/injection
ADC-range
CVBS-sync amplitude
– 1.0
1.0
45
100
– 15
15
1.7
2.0
0.1
µA CVBS = 2 V
pF
nF
mV/ I_l = 2 µA
µA C_CPL = 100 nF
V
V_REF = 3 V
V
Crystal Oscillator: XIN, XOUT
Bias resistance between XIN, R_Xbias
XOUT
Small signal voltage gain
G_V
Feedback capacitance
C_FB
Pin capacitance
C_P
Crystal
Nominal frequency
f_O
Effect of temperature and
df/f_O
accuracy of adjustment
Temperature range
T_A
Resonant impedance
Z_R
Equivalent parallel C
C_L
Crystal load
Ext. capacitors
C_1,2
60 120 180 kΩ
8
13
100 kHz, 50 mVpp
4.0 pF
7.0 pF
20.48
MHz
–5%
+5%
0
70 °C
40 Ω
15
pF
0.1 mW
15
pF
The center frequency of the MEGATEXT horizontal PLL is proportional to the crystal frequency. In PAL-mode the
centre frequency is 15.625 kHz for the typical crystal frequency of 20.48 MHz. Deviations from the typical crystal
frequency will shift the range of the horizontal frequencies where the PLL is able to lock.
Semiconductor Group
18
1997-09-01