Evaluation Board Hardware; Ad7276 Device Description; Power Supplies - Analog Devices EVAL-AD7276SDZ User Manual

UG-450

EVALUATION BOARD HARDWARE

AD7276 DEVICE DESCRIPTION
The AD7276 can interface to microprocessors or DSPs.
The input signal is sampled on the falling edge of CS , and the
conversion is also initiated at this point. There are no pipeline
delays associated with the part.
The AD7276 uses advanced design techniques to achieve very
low power dissipation at high throughput rates.
The reference for the part is taken internally from V
allows the widest dynamic input range to the ADC; therefore,
the analog input range for the part is 0 V to V
rate is determined by the SCLK.
For more information about the AD7276, refer to the
sheet, which should be used in conjunction with this user guide.
Table 1. External Power Supplies Required
Power Supply Connector
V 1 J1 or J2
IN
+AMP J3-3
−AMP J3-1
V J4
DD
1 When V is supplied, all other power supplies are available on board. If the V
IN
. This
DD
. The conversion
DD
AD7276 data
Voltage Range Purpose
7 V to 9 V Supplies all on-board power supplies, generating all required voltages to run the
evaluation board
+5 V Supplies the positive rail of the amplifier
−5 V Supplies the negative rail of the amplifier
2.35 V to 3.6 V Supplies the V
Rev. 0 | Page 8 of 20
EVAL-AD7276SDZ User Guide

POWER SUPPLIES

The EVAL-AD7276SDZ
controlled mode and standalone mode (see the Modes of
Operation section for more information).
When the EVAL-AD7276SDZ
the EVAL-SDP-CB1Z
ac transformer to Connector J1 on the
board. The V , +AMP, and −AMP supplies are generated on
DD
board. When the EVAL-AD7276SDZ
mode, the V and amplifier supplies must be sourced from
DD
external sources (see Table 1).
Alternatively, a bench power supply can be connected to J2 to
supply 7 V to 9 V.
digital supply
DD
supply is not used, all other power supplies must be sourced from an external source.
IN
can be used in two modes: SDP
board is used in conjunction with
board (SDP controlled mode), connect the
EVAL-AD7276SDZ
board is used in standalone