AD9865 datasheet(39/49 Pages) AD

Part #	AD9865

Description	Broadband Modem Mixed-Signal Front End

PDF	49 Pages

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Manufacturer	AD [Analog Devices]

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39 / 49 page

AD9865

Data Sheet

Rev. B | Page 38 of 48

CLKOUT2 is a divided version of the reference frequency, fOSCIN,

and can be set to be a submultiple integer of fOSCIN (fOSCIN/2L,

where L = 0, 1, or 2). With L set to 0, the output of CLKOUT2 is

a delayed version of the signal appearing at OSCIN, exhibiting

the same duty cycle characteristics. With L set to 1 or 2, the

output of CLKOUT2 is a divided version of the OSCIN signal,

exhibiting a near 50% duty cycle, but without having a determi-

nistic phase relationship relative to CLKOUT1 (or RXCLK).

Table 23. SPI Registers for CLK Synthesizer

Address (Hex)

Bit

Description

0x04

(4)

ADC CLK from PLL

(3:2)

PLL divide factor (P)

(1:0)

PLL multiplication factor (M)

0x06

(7:6)

CLKOUT2 divide number

(5)

CLKOUT2 invert

(4)

CLKOUT2 disable

(3:2)

CLKOUT1 divide number

(1)

CLKOUT1 invert

(0)

CLKOUT1 disable

AD9865 Datasheet(PDF) 39 Page - Analog Devices