SDA5273-2S データシートの表示（PDF） - Siemens AG

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SDA5273-2S

ICs for Consumer Electronics MEGATEXT and MEGATEXT PLUS ICs

Siemens AG 

SDA 5273 / 75

SDA 5273-2 / 75-2

Characteristics (cont’d)

TA = 0 to 70 °C

Parameter

Symbol Limit Values Unit Test Condition

min. typ. max.

CVBS-Input and ADC (VREF = 3 V)

Input leakage current

Il

Input capacitance

CP

Ext. coupling capacitance

CCPL

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/ Il = 2 µA

µA CCPL = 100 nF

V

VREF = 3 V

V

Crystal Oscillator: XIN, XOUT

Bias resistance between XIN, RXbias

XOUT

Small signal voltage gain

GV

Feedback capacitance

CFB

Pin capacitance

CP

Crystal

Nominal frequency

fO

Effect of temperature and

df/fO

accuracy of adjustment

Temperature range

TA

Resonant impedance

ZR

Equivalent parallel C

CL

Crystal load

Ext. capacitors

C1,2

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

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