TDA9885 Просмотр технического описания (PDF) - Philips Electronics

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TDA9885

I²C-bus controlled single and multistandard alignment-free IF-PLL demodulators

Philips Electronics 

Philips Semiconductors

I2C-bus controlled single and multistandard

alignment-free IF-PLL demodulators

Product specification

TDA9885; TDA9886

6. The intercarrier output signal at pin SIOMAD can be calculated by the following formula taking into account the

internal video signal with 1.1 V (p-p) as a reference:

Vo(intc)(rms) =

1.1 × -----1----- × 10r

22

V

and

r

=

2--1--0--

×





V-V----ii-((-SP---CC---))

( dB )

+

6

dB

±

3

dB

where:

-----1-----

22

is the correction term for RMS value,

VV-----ii-((--SP---CC----)) (dB)

is the sound-to-picture carrier ratio at pins VIF1 and VIF2

in dB, 6 dB is the correction term of internal circuitry and ±3 dB is the tolerance of video output and intercarrier output

Vo(intc)(rms).

7. Pin REF is able to operate as a 1-pin crystal oscillator input as well as an external reference signal input, e.g. from

the tuning system.

2003 Oct 02

6

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