8-/10-Lead PulSAR User Guide
UG-340
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-/10-Lead Family of 14-/16-/18-Bit PulSAR ADCs
The 8-lead PulSAR evaluation board covers the following 8-lead
PulSAR ADCs: AD7683 (16-bit), AD7684 (16-bit), and AD7694
(16-bit).
FEATURES
Full featured evaluation board for 8-/10-lead PulSAR ADCs
Versatile analog signal conditioning circuitry
On-board reference, reference buffers, and ADC drivers
PC software for control and data analysis of time and
frequency domain
These low power ADCs offer very high performance of up to
18 bits with throughputs ranging from 100 kSPS to 1.33 MSPS.
The evaluation board is designed to demonstrate the performance
of the ADCs and to provide an easy to understand interface
for a variety of system applications. A full description of these
products is available in their respective data sheets, which
should be consulted when using this evaluation board.
System demonstration platform compatible (EVAL-SDP-CB1Z)
EQUIPMENT NEEDED
Evaluation board (see Table 5)
Wall adapter power supply
Additional equipment needed
SDP board (EVAL-SDP-CB1Z) (optional)
Precision source
The evaluation board is ideal for use with Analog Devices, Inc.,
system demonstration platform (SDP). This evaluation board
interfaces to the SDP board via a 120-pin connector. SMA
connectors, J6 and J10, are provided for the low noise analog
signal source.
Cable (SMA input to evaluation board)
GENERAL DESCRIPTION
On-board components include a high precision buffered band gap
5.0 V reference (ADR435), a signal conditioning circuit with two
op amps (ADA4841-1), and a power supply to derive the necessary
voltage levels to supply all voltage needs. The 8-lead board also
includes a level shifter (ADG3304) to interface the ADC with
the EVAL-SDP-CB1Z.
The 10-lead PulSAR® evaluation board covers the following
10-lead PulSAR analog-to-digital converters (ADCs): AD7685
(16-bit), AD7686 (16-bit), AD7687 (16-bit), AD7688 (16-bit),
AD7690 (18-bit), AD7691 (18-bit), AD7693 (16-bit), AD7942
(14-bit), AD7946 (14-bit), AD7980 (16-bit), AD7982 (18-bit),
AD7983 (16-bit), AD7984 (18-bit), AD7988-5 (16-bit), AD7989-5
(18-bit), AD7915 (16-bit) and AD7916 (16-bit).
SIMPLIFIED EVALUATION BOARD BLOCK DIAGRAM
VIN = 9V
WALL ADAPTER
(OPTIONAL)
–V
S
POWER SUPPLY CIRCUITRY
ADP7102, ADP7104, ADP2301
GND
+V
S
+7.5V/-2.5V 2.5V/5V +7.5V 3.3V +5V
(OPTIONAL)
ADR435
5V
VDD
5V
GND
VSDP
VCM
AD8031
ADSP-BF527
DSP
ADA4841-1
ADA4841-1
+7.5V
–2.5V
REF OVDD
SDI
VDD
IN+
VIN+
VIN–
SCK
ADC
+7.5V
SDO
CNV
SPORT
IN–
GND
GLUE
LOGIC
A
B
–2.5V
10-LEAD PulSAR EVALUATION BOARD
SDP BOARD
Figure 1.
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. C | Page 1 of 31