Analog Devices AD7298 Evaluation Board EVAL-AD7298SDZ EVAL-AD7298SDZ データシート

製品コード
EVAL-AD7298SDZ
ページ / 16
 
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 
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 
evaluation software. 
On-board components include: th
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. 
 
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. 
DEVICE DESCRIPTION 
This user guide describes the evaluation board for th
which is a 12-bit, 8-channel successive approximation ADC with 
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.  
 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.  
Complete specifications for th
 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. 
 
 
 
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.