NXP Semiconductors Triple high-speed Analog-to-Digital Converter 110 Msps TDA8752B - Manual (Page 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 © Philips Electronics N.V. 2000. All rights reserved.
The bits Vco1 and Vco0 control the VCO gain.
The default programmed value is as follows:
• Internal resistance = 16 k
Ω
• VCO gain = 15 MHz/V.
Table 9: VCO register bits
Z2 Z1 Z0 Resistance (k
Ω
)
0 0 0 high impedance
0 0 1 128
0 1 0 32
0 1 1 16
1 0 0 8
1 0 1 4
1 1 0 2
1 1 1 1
Table 10: VCO gain control
Vco1 Vco0 VCO gain (MHz/V) Pixel clock
frequency range
(MHz)
0 0 15 10 to 20
0 1 20 20 to 40
1 0 35 40 to 70
1 1 50 70 to 110