Analog Devices AD9864 User manual

Brand: Analog Devices

Model: AD9864

Type: User manual

This manual is also suitable for

AD9874



Table of Contents



There are four SMA connectors on the evaluation board. The

functions of these connectors are outlined in Table I.

Table I. SMA Connectors for external signals





The LO input for the ’s mixer can be supplied by

either an external RF generator via SMA connector J1, or one

of two VCO options on the PCB as shown in figure 4. The

two VCO options include a low power MAX2606 series or

To optimize the loop

filter, the VCO’s K

VCO

can be determined by driving a DC

voltage into TP2 while monitoring the VCO output frequency.

a standard footprint and can

be replaced by other vendor models like ZCOM, and RFMD.

In addition, the MAX2606 VCO requires an high Q external

inductor, L4, that sets its tuning frequency range and is also

part of a product family providing other frequency ranges.

The loop filter consists of R35, C39 and

C40 with R31 and R32 being used to select between the VCO

inputs. Note that these resistors also form an additional pole

for the loop filter when combined with C58 and C37

respectively. The selection of the LO options is via the

installation/removal of 0 ohm resistors as shown in Table II.

Table I. Selection of LO options

installation/removal of 0 ohm resistors to

support these different options.

Table II. Selection of different CLK options



09910-006

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Analog Devices AD9864 User manual

Brand: Analog Devices

Model: AD9864

Type: User manual

This manual is also suitable for

AD9874

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