Power Supplies; Changes To Power Supplies Section - Analog Devices EVAL-ADAQ4001 User Manual

User Guide
EVALUATION BOARD HARDWARE

POWER SUPPLIES

The SDP-H1 supplies 3.3 V to power the rails for the different com-
ponents on the EVAL-ADAQ4001FMCZ/EVAL-ADAQ4003FMCZ.
The ADAQ4001 µModule and the
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 a 1.8 V operation. A combination of the
ADP5070 (dual, high performance dc-to-dc switching regulator), the
LT3032 (dual, low noise, positive and negative low dropout voltage
linear regulator), and the LT3023
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
the EVAL-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 EVAL-ADAQ4001PMDZ and
EVAL-ADAQ4003PMDZ entrance and device connection. A single,
on-board ground plane minimizes the effect of the high frequency
noise interference.
In addition, the EVAL-ADAQ4001PMDZ and the EVAL-
ADAQ4003PMDZ can be powered from a benchtop power supply
of ±15.5 V. The +15.5 V, −15.5 V, 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.
Take the following steps to set up the EVAL-ADAQ4001PMDZ or
the EVAL-ADAQ4003PMDZ when using a benchtop power supply
of ±15.5 V:
1. Connect the EVAL-ADAQ4001PMDZ or the EVAL-
ADAQ4003PMDZ to the EVAL-PMD-IB1Z interposer board at
the P1 header (see Figure
2. Connect the EVAL-PMD-IB1Z interposer board to the SDP-H1
via the 160-pin FMC connector.
3. Connect the USB and a 12 V power adapter to the SDP-H1.
Ensure that the software and drivers are installed.
4. Connect the +15.5 V and −15.5 V bench supplies to the +15.5
V and −15.5 V test points on the EVAL-ADAQ4001PMDZ or
the EVAL-ADAQ4003PMDZ (see
supply ground to the GND test point as shown in
analog.com
ADAQ4003 µModule use four
(dual, micropower, low noise, low
EVAL-ADAQ4001PMDZ
Components Used
ADP5070, LT3032, LT3023
ADP5070, LT3032
ADP5070, LT3032, LT3023
1).
Figure 3). Connect the bench
Figure 3.
EVAL-ADAQ4001/EVAL-
5. Power up the benchtop supply. The +15.5 V supply rail draws
approximately 25 mA, and the −15.5 V supply rail draws ap-
proximately 20 mA.
The EVAL-ADAQ4001PMDZ or the EVAL-ADAQ4003PMDZ is now
ready to use. See the
tails on using the Analysis | Control | Evaluation (ACE)
Note that by default, the EVAL-ADAQ4001PMDZ and the EVAL-
ADAQ4003PMDZ are set up to accept a differential input at J1 and
J2 with a 22 V range.
and
Figure 3. EVAL-ADAQ4001PMDZ and EVAL-ADAQ4003PMDZ External Supply
ADAQ4003
Evaluation Board Software section for de-
(Optional) Connections
Rev. B | 6 of 31
software.