Analog Devices EVAL-AD5677RSDZ User Manual page 3

EVAL-AD5677RSDZ
EVALUATION BOARD HARDWARE
POWER SUPPLIES
The EVAL-AD5677RSDZ provides on-board 3.3 V and 5 V
regulators powered through the USB supply or from an external
source. If a different supply is required, or if the evaluation board is
controlled through the PMOD connector, an external supply
must be provided by the external supply voltage (EXTSUP)
connector. See Table 1 for more information.
Each supply is decoupled to ground with 10 μF tantalum and
0.1 μF ceramic capacitors.
Table 1. Power Supply Connectors
Connector Label
EXTSUP, Pin 1
EXTSUP, Pin 2
EXT_REF
Table 2. Link Functions
Link Description
PWR_SEL This link selects the primary analog voltage source for the 3.3 V output and 5 V output for VDD_SEL. There are two
options, as follows:
The USB option selects the USB supply from Pin 5 of the 120-pin connector of the
The EXT option selects an EXTSUP connector. The voltage applied to EXTSUP must be between 2.7 V and 5.5 V.
VDD_SEL This link selects the DAC analog voltage source. There are three options, as follows:
The 5V0 option selects the on-board 5 V source from the LTC3536.
The 3V3 option selects the on-board 3.3 V source from the ADM7160.
The EXT option selects an EXTSUP connector. The voltage applied to EXTSUP must be between 2.7 V and 5.5 V.
GAIN_SEL This link selects the gain setting for the DAC. There are three options, as follows:
The gain option allows the
The high option selects gain = 2.
The low option selects gain = 1.
REFSUP_SEL This link selects the voltage supply for the on-board voltage reference, ADR4525. There are three options, as follows:
The 5V0 option selects the on-board 5 V source from the LTC3536.
The 3V3 option selects the on-board 3.3 V source from the ADM7160.
The EXT option selects an EXTSUP connector. Voltage applied to EXTSUP must be between 2.7 V and 5.5 V.
REF This link selects the external reference voltage for the DAC. The internal reference must be disabled first before using
this feature (refer to the
The 2V5 option selects the on-board 2.5 V reference voltage from the ADR4525.
The EXT option selects an EXT_REF connector. The voltage applied to EXT_REF must be between 1 V and V
1, and between 1 V and V
Table 3. On-Board Connectors
Connector
EXTSUP
EXT_REF
P2
P3
User Guide
External Voltage Supplies Description
External analog power supply from 2.7 V to 5.5 V.
Analog ground.
External voltage reference. The
ACE plug-in to control the gain setting of the device.
AD5677R data sheet). There are two options, as follows:
/2 if gain = 2.
DD
Function
External analog power supply from 2.7 V to 5.5 V.
External voltage reference.
DAC outputs from V 0 to V
OUT
DAC outputs from V 8 to V
OUT
LINK OPTIONS
A number of link options are incorporated on the EVAL-
AD5679RSDZ and must be set for the required operating
conditions before using the board. The functions of these link
options are described in Table 2.
ON-BOARD CONNECTORS
Table 3 shows the connectors on the EVAL-AD5677RSDZ.
AD5673R/AD5677R
7.
OUT
15.
OUT
Rev. 0 | Page 3 of 13
requires an external voltage reference.
SDP-B board.
UG-1766
if gain =
DD