AD9513/PCB, AD9514/PCB, AD9515/PCB
Rev. 0 | Page 3 of 8
SETTING UP THE EVALUATION BOARD
HARDWARE
The AD9513/AD9514/AD9515 evaluation board requires a 3.3 V
power supply. Some form of input clock must be provided,
usually from a signal generator. A high speed oscilloscope is
helpful in order to see the waveforms present at the clock outputs.
SOFTWARE
No software is required to program the
AD9513/AD9514/AD9515. All of the programming of the part
is provided by the headers and shunts on the evaluation board
itself (see the
Programming the Board section).
PROGRAMMING THE BOARD
The digital logic on the AD9513/AD9514/AD9515 is
completely combinational and controlled by the 11 pins labeled
S0 to S10. Each of these pins must be set to one of four voltage
levels (four-state logic). A set of four-position headers is
provided to allow for programming the part using removable
shunts.
Four-State Digital Logic
Table 1 shows the four-state digital logic inputs and their logic
levels and voltages.
Table 1. Four-State Digital Logic Voltage Settings
Logic Input Voltage Description
1 V
S
3.3 V Tie pin to V
S
.
⅔
VREF
⅔ (V
S
)
Internally generated voltage
reference provided at Pin VREF.
Can drive up to all of the logic inputs.
Do not use for other purposes.
⅓
N/C
⅓ (V
S
)
Internal self-bias of pin. Leave pin as
no connect.
0 GND 0 V Tie pin to ground.
The ⅔ (V
S
) voltage is set by connecting the input to the VREF
pin on the chip. The ⅓ (V
S
) voltage is obtained by not driving
the input pin at all, thus allowing it to self-bias.
To program the AD9513/AD9514/AD9515 evaluation board,
first determine the logic levels/voltages that should be applied
to the digital inputs. A programming reference appears in the
data sheet. Set each of the programming pins (S0 to S10) to the
appropriate logic level by attaching a shunt to the proper
position on each of the four-position headers.
To the left of the row of headers, a label indicates the logic level
of each row of pins. To the right of the row of headers, a
corresponding label indicates the voltage level of each row of
pins. Note that the row corresponding to a logic level of ⅓
shows that the connection is N/C. When the ⅓ logic level is
needed, the shunt should be placed on the pins, but there is no
connection to the device pin for this logic level.
To program the AD9513 to have all outputs on in LVDS mode,
for example, the S2 and S1 programming pins must be set to
⅓ (V
S
). On the AD9513/AD9514/AD9515 evaluation board,
locate the 4-position headers that correspond to digital inputs
S2 and S1. Then, referring to the label to the left side of the row
of headers, attach the shunts across the pins corresponding to
the marking for logic level ⅓. Note that the label to the right of
the row of headers indicates that this is an N/C as far as voltage is
concerned.
