Analog Devices AD7298 Evaluation Board EVAL-AD7298SDZ EVAL-AD7298SDZ データシート
製品コード
EVAL-AD7298SDZ
Evaluation Board User Guide
UG-254
One
Technology
Way
•
P.O.
Box
9106
•
Norwood,
MA
02062-9106,
U.S.A.
•
Tel:
781.329.4700
•
Fax:
781.461.3113
•
www.analog.com
Evaluation Board for the
8-Channel, 1 MSPS, 12-Bit SAR ADC with
Temperature Sensor
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. A | Page 1 of 16
FEATURES
Full-featured evaluation board for the
(Rev. C)
Link options
On-board analog bias-up circuit
PC control in conjunction with system demonstration
On-board analog bias-up circuit
PC control in conjunction with system demonstration
platform (SDP)
PC software for control
EVALUATION BOARD DESCRIPTION
The EVAL-AD7298SDZ is a full-featured evaluation board
designed to allow the user to easily evaluate all features of the
AD7298. The evaluation board can be controlled via the SDP
connector (J1). The SDP board allows the evaluation board to
be controlled through the USB port of a PC using the
designed to allow the user to easily evaluate all features of the
AD7298. The evaluation board can be controlled via the SDP
connector (J1). The SDP board allows the evaluation board to
be controlled through the USB port of a PC using the
evaluation software.
On-board components include: the
low dropout CMOS
linear regulator, the
high speed, a low noise amp, and the
high performance 145 MHz FastFET™ amp.
The evaluation board features analog bias-up circuitry. Bipolar
signals are input via the VIN SMB connector and are biased up
by the on-board bias-up buffer circuit. The biased up signal is
available at the BIASED_VIN2 SMB and can be applied to any one
of the eight VINx SMB connectors using an SMB-to-SMB cable.
signals are input via the VIN SMB connector and are biased up
by the on-board bias-up buffer circuit. The biased up signal is
available at the BIASED_VIN2 SMB and can be applied to any one
of the eight VINx SMB connectors using an SMB-to-SMB cable.
Various link options are described in the Evaluation Board
Hardware section. The Link Options section of this user guide
should be consulted when configuring the board for standalone
operation.
Hardware section. The Link Options section of this user guide
should be consulted when configuring the board for standalone
operation.
DEVICE DESCRIPTION
This user guide describes the evaluation board for the
which is a 12-bit, 8-channel successive approximation ADC with
internal temperature sensor.
internal temperature sensor.
offers a programmable sequencer, which enables
the selection of a preprogrammed sequence of channels for
conversion. The device has an on-chip 2.5 V reference that can
be disabled to allow the use of an external reference.
conversion. The device has an on-chip 2.5 V reference that can
be disabled to allow the use of an external reference.
includes a high accuracy, band gap, temperature
sensor, which is monitored and digitized by the 12-bit ADC to
give a resolution of 0.25°C.
give a resolution of 0.25°C.
Complete specifications for the
are provided in the
data sheet, available from Analog Devices, Inc., and
should be consulted in conjunction with this user guide when
using the evaluation board.
using the evaluation board.
FUNCTIONAL BLOCK DIAGRAM
SDP
BOARD
SCLK
VBIASED
VIN
V
DRIVE
V
IN7
V
IN0
V
DD
VDRIVE
USB
CONNECTION
TO PC
BIAS-UP
CIRCUITRY
DOUT
DIN
CS
EVAL-AD7298SDZ
AD7298
V0
V7
3.3V
REGULAR
EXT_VCC AGND
DGND VDRIVE
–5V
+5V
AGND
097
1
1-
0
01
Figure 1.