NXP Semiconductors TDA8752B Bedienungsanleitung PDF herunterladen (Seite 20)

Philips Semiconductors

TDA8752B

Triple high-speed Analog-to-Digital Converter 110 Msps

Product speciﬁcation Rev. 03 — 21 July 2000 20 of 38

9397 750 07338

The bits Vco1 and Vco0 control the VCO gain.

The default programmed value is as follows:

•

Internal resistance = 16 kΩ

•

VCO gain = 15 MHz/V.

Table 9: VCO register bits

Z2 Z1 Z0 Resistance (kΩ)

0 0 0 high impedance

001128

01032

01116

1008

1014

1102

1111

Table 10: VCO gain control

Vco1 Vco0 VCO gain (MHz/V) Pixel clock

frequency range

(MHz)

0 0 15 10to20

0 1 20 20to40

1 0 35 40to70

115070to110

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 37 38

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NXP Semiconductors TDA8752B Bedienungsanleitung Seite 20