Evaluation Board Hardware; Setting Up The Evaluation Board; Sdp-H1 Controller Board; Power Supplies - Analog Devices EVAL-ADAQ23876FMCZ User Manual

User Guide

EVALUATION BOARD HARDWARE

SETTING UP THE EVALUATION BOARD

Figure 2 shows the simplified evaluation board block diagram of the
EVAL-ADAQ23876FMCZ and EVAL-ADAQ23878FMCZ connected
to the SDP-H1 controller board. The board consists of one µModule
(U1, ADAQ23878 or ADAQ23876), a choice of a 4.096 V reference
(U5, LTC6655) or 2.048V reference (U3, ADR4520), on-board pow-
er supplies to drive the necessary supply rails using the
(U6), the ADP7118 (U4), the ADP7183
an 800 MHz clock distribution IC (U13). The user also has an option
to use the A2 and A3 amplifiers, such as the ADA4899-1, when
evaluating the ADAQ23876 or ADAQ23878.

SDP-H1 CONTROLLER BOARD

The EVAL-ADAQ23876FMCZ and EVAL-ADAQ23878FMCZ use a
serial peripheral interface (SPI) and connect to the high speed
SDP-H1. The SDP-H1 requires power from a 12 V wall adapter.
®
The SDP-H1 has a Xilinx Spartan 6 and an
or with connectivity to the PC through a USB 2.0 high speed port.
The controller boards allow the configuration and capture of data on
the daughter boards from the PC via a USB.
The SDP-H1 has a field programmable gate array (FPGA) mezza-
nine card (FMC) low pin count (LPC) connector with full differential
low voltage differential signaling (LVDS) and singled-ended low
voltage complementary metal-oxide semiconductor (LVCMOS) sup-
port. The SDP-H1 also features the 160-pin connector, found on
the SDP-B, which exposes the Blackfin
This connector provides a configurable serial, parallel I
and general-purpose input/output (GPIO) communications lines to
the attached daughter board for the functional description of the
on-board power supplies.
analog.com
EVAL-ADAQ23876/EVAL-ADAQ23878
Figure 2. Simplified Evaluation Block Diagram
LTM8049
(U7), the LT3023 (U8), and
ADSP-BF527 process-
®
processor peripherals.
2
C and SPI,

POWER SUPPLIES

By default, all necessary supply rails on the EVAL-
ADAQ23876FMCZ and EVAL-ADAQ23878FMCZ are powered by
a 3.3 V rail coming from the SDP-H1. The EVAL-ADAQ23876FMCZ
and EVAL-ADAQ23878FMCZ can be powered from an external
3.3 V supply applied using the JP9 solder link if desired (see
Table 2). The positive rails of the EVAL-ADAQ23876FMCZ and
EVAL-ADAQ23878FMCZ, 7 V (+VS), 5 V (VDD), and 2.5 V (VIO),
are generated from a combination of the power µModule,
(U6), ADP7118 (U4), and a dual output low dropout (LDO) regula-
tor, LT3023 (U8). The negative rail of the EVAL-ADAQ23876FMCZ
and EVAL-ADAQ23878FMCZ, −2.0 V (−VS), is generated by a
combination of the power µModule, LTM8049 (U6), and
(U7). Each supply rail has necessary decoupling capacitors placed
close to the device. A single ground plane is used on the board to
minimize the effect of high frequency noise interference.
Table 1. On-Board Power Supplies
Power Supply (V) Function
+7.5, −2.5 Supply rails using the LTM8049
+7 (default) VS+ rail using the LT3023
−2 (default) VS− rail using the ADP7183
+2.5 VIO rail using the ADP7118
+5 VDD rail using LT3023

ANALOG INPUTS

The Subminiature Version A (SMA) connectors (VIN+ and VIN−)
on the EVAL-ADAQ23876FMCZ and EVAL-ADAQ23878FMCZ are
used to provide analog inputs from a low noise, audio precision
signal source (such as the SYS-2700 or the SYS-x555 series).
There are two options available to feed analog inputs directly to the
ADA4899-1 and ADAQ23876
LTM8049
ADP7183
or ADAQ23878, as shown in Figure
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