Power Supplies - Analog Devices EVAL-ADAQ4003FMCZ User Manual

EVAL-ADAQ4003FMCZ

POWER SUPPLIES

The system demonstration platform board (SDP-H1) supplies
3.3 V to power the rails for the different components on the
EVAL-ADAQ4003FMCZ.
The ADAQ4003 uses four power supply pins: the ADC driver
positive supply (VS+), the ADC driver negative supply (VS−),
the core ADC supply (VDD), and the digital input and output
interface supply (VIO). The VIO pin allows the direct interface
with any logic c between 1.8 V and 5.5 V. To reduce the number
of supplies required, VIO and VDD can be tied together for an
1.8 V operation. A combination of the
performance dc-to-dc switching regulator), the
low noise, positive and negative low dropout voltage linear
regulator), and the LT3023 (dual, micropower, low noise, low
dropout regulator) can generate independently regulated
positive and negative rails for all four power supply pins,
including ±15 V rails for any additional signal conditioning.
Table 1. Default Power Supplies Available on the EV-
ADAQ4003PMDZ
Power Supply (V) Function
+5.5 Reference rail
±15 Amplifier rails
+1.8, +3.3, or +5.5 µModule rails
Each supply is decoupled at the
and device connection. A single, on-board ground plane
minimizes the effect of the high frequency noise interference.
In addition, the EV-ADAQ4003PMDZ can be powered from a
benchtop power supply of ±15.5 V. The +15.5V, −15.5V, and
GND test points are available on board to support this function.
When bench power is used, the on-board power supplies are no
longer required, and the link between the output pin of the
ADP5070 must be removed, that is, uninstall R20 and R22.
Evaluation Board User Guide
ADP5070 (dual, high
LT3032 (dual,
Components Used
ADP5070, LT3032, LT3023
ADP5070, LT3032
ADP5070, LT3032, LT3023
EV-ADAQ4003PMDZ entrance
Take the following steps to set up the EV-ADAQ4003PMDZ
when using a benchtop power supply of ±15.5 V:
1. Connect the EV-ADAQ4003PMDZ board to EVAL-PMD-
IB1Z interposer board at the P1 header (see Figure 1).
2. Connect the EVAL-PMD-IB1Z interposer board to the
SDP-H1 board via the 160-pin FMC connector.
3. Connect the USB and a 12 V power adaptor to the SDP-H1
board. Ensure that the software and drivers are installed.
4. Connect the +15.5 V and −15.5 V bench supplies to the
+15.5V and −15.5V test points on the EV-ADAQ4003PMDZ
(see Figure 3). Connect the bench supply ground to the
GND test point as shown in Figure 3.
5. Power up the benchtop supply. The +15.5 V supply rail
draws approximately 25 mA, and the −15.5 V supply rail
draws approximately 20 mA.
The EV-ADAQ4003PMDZ is now ready to use. See the
Evaluation Board Software section for details on using the
ADAQ400x evaluation board
EV-ADAQ4003PMDZ is setup to accept a differential input at
J1 and J2 with a 20 V range.
GND
Figure 3. EV-ADAQ4003PMDZ External Supply Connections
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software. Note that by default, the
+15.5V
–15.5V