Analog Devices ADMV1013-EVALZ, User Manual

Page: 11 / 19

ADMV1013-EVALZ User Guide UG-1461
Rev. B | Page 11 of 19
SETTING V
CTRL
VOLTAGE FOR THE ADMV1013
The ADMV1013-EVALZ evaluation board comes with the
AD5601 nano DAC. The AD5601 nano DAC sets the V
CTRL
voltage
for the VCTRL1 and VCTRL2 pins of the ADMV1013 . When
the ADMV1013 plugin opens, enter the V
CTRL
voltage in the
VCTRL1 and VCTRL2 Voltage (mV) box in the INITIAL
CONFIGURATION section to set the voltage (see Figure 12).
Note that 1800 mV is the highest gain setting for the devices.
When using an external power supply for the V
CTRL
voltage, use
the AD5601 nano DAC plugin to change the voltage or power
down the AD5601 nano DAC. To open the AD5601 nano DAC
plugin, double click the AD5601 button in the ADMV1013-
044718 RevA
tab (see Figure 12). Figure 16 shows the AD5601
nano DAC user interface. The user interface contains the Power
Down Modes box, the VCTRL1 and VCTRL2 Voltage (mV)
box, and the Equivalent Decimal Value box.
To power up or power down the AD5601 nano DAC, enter a value
in the Power-Down Modes box, or use the scroll arrows to
adjust the value. To use the AD5601 nano DAC, set the Power-
Down Modes box to 0. When the V
CTRL
voltage is being applied
externally through the test loop, set the Power Down Modes
box to 1, 2, or 3. For more information on the different power-
down modes of the
AD5601 nano DAC, see the AD5601 data sheet.
17
268-
0
16
Figure 16. AD5601 nanoDAC User Interface
To set the V
CTRL
voltage, enter a value in the VCTRL1 and
VCTRL2 Voltage (mV)
box, or type the corresponding decimal
number for an 8-bit register in the Equivalent Decimal Value
box. The V
CTRL
voltage range available is 0 mV to 3300 mV. Set
the VCTRL1 and VCTRL2 Voltage (mV) value to 0 mV for the
lowest gain of the ADMV1013 , and to set it to 1800 mV for the
highest gain of the ADMV1013 . There is no change in the gain
of the ADMV1013 for V
CTRL
values above 1800 mV.
After making any changes to the voltage or to the power-down
mode, click
Apply Changes (see Figure 16). To allow the changes
to take place automatically, select Auto Apply in the ADMV1013-
044718 RevA
tab. There is no need to click
Apply Changes
after selecting Auto Apply .
UPDATING REGISTER 0X0A SEQUENCE
When Register 0x0A needs to be updated, the update must
follow a specific sequence. The
ACE software automatically
follows this sequence when Register 0x0A is in need of an update.
The sequence that the
ACE software carries out is as follows:
1. Disable PARITY_EN bit (Bit 15, Register 0x00).
2. Write to Register 0x0A.
3. Enable PARITY_EN bit (Bit 15, Register 0x00).