TDA9887 データシートの表示（PDF） - Philips Electronics

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TDA9887

I2C-bus controlled multistandard alignment-free IF-PLL demodulator with FM radio

Philips Electronics 

Philips Semiconductors

I2C-bus controlled multistandard alignment-free

IF-PLL demodulator with FM radio

Product specification

TDA9887

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.

2004 Aug 25

6

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