Analog Devices EVAL-AD9959 User Manual page 4

User Guide
EVALUATION BOARD HARDWARE
EVALUATION BOARD LAYOUT
Manual I/O Control Headers
Provides the interface for communication with the
the part is under the control of an external controller (manual
control). See Eval Board Control
Multi Device Synchronous Control
These connections set up the AD9959 for multi device synchronous
operation.
DAC Channels
These connections represent the DAC filtered/unfiltered output and
AVDD power supply.
Clock Input Supply
Powers the AD9959's clock input circuitry.
Clock Mode Select
Controls whether the part is driven by a 20 MHz to 30 MHz crystal
provided by the user, or by an external signal generator, such as
Ref Clk.
Ref Clk Input
Input for the external Ref Clk signal.
analog.com
AD9959 when
for correct jumper settings.
Figure 2.
Band Gap Supply
Provides the voltage needed for band gap functionality.
Power Supply
Powers the AD9959's USB circuitry, I/O circuitry, and the digital
portion (DVDD) of the DACs. Note AVDD is not powered via this
connector (TB1).
RU/RD Control, SDIO
Jumpers W6, W5, and W4 must be set to control the Ramp Up/
Ramp Down feature using the SDIO pins.
USB Port
When the part is under PC control (default mode), the evaluation
board communicates with the AD9959 via this port.
Eval Board Control
These jumpers set up the AD9959 for manual or PC control (control
through the USB port).
ments for PC control. For manual control remove jumpers W0, W1,
W2, and W3; set W7 on the manual control pin (move jumper one
position to the left).
EVAL-AD9959
Figure 3 shows the correct jumper place-
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