EVAL-AD5933EBZ Datasheet, PDF (1/32 Pages) Analog Devices – Evaluation Board for the 1 MSPS 12-Bit Impedance Converter Network Analyzer

Preliminary Technical Data
Evaluation Board for the 1 MSPS 12-Bit
Impedance Converter Network Analyzer
EVAL-AD5933EB
FEATURES
Full-featured evaluation board for the AD5933
Graphic user interface software with frequency sweep
capability for board control and data analysis
Various power supply linking options
Standalone capability with serial I²C loading from on-board
microcontroller
Selectable system clock options, including internal RC
oscillator or on-board 16 MHz crystal
GENERAL DESCRIPTION
This document describes the evaluation board for the AD5933
and the application software developed to interface to the device.
The AD5933 is a high precision impedance converter system that
combines an on-board frequency generator with a 12-bit, 1 MSPS
ADC. The frequency generator allows an external complex im-
pedance to be excited with a known frequency. The response
signal from the impedance is sampled by the on-board ADC,
and the DFT is processed by an on-board DSP engine at each
excitation frequency. The AD5933 also contains an internal
temperature sensor with 13-bit resolution and operates from a
2.7 V to 5.5 V supply.
Other on-board components include an ADR423 3.0 V reference
that acts as a stable supply voltage for the separate analog and
digital sections of the device and an ADP3303 ultrahigh precision
APPLICATIONS
Electrochemical analysis
Impedance spectroscopy
Complex impedance measurement
Corrosion monitoring and protection equipment
Biomedical and automotive sensors
Proximity sensing
regulator that acts as a supply to the on-board universal serial bus
controller, which interfaces to the AD5933. The user can power
the entire circuitry from the USB port of a computer. The eval-
uation board also has a high performance, trimmed, 16 MHz,
surface-mount crystal that can act as a system clock for the
AD5933, if required.
The various link options available on the evaluation board are
explained in Table 2. Interfacing to the AD5933 is through a
USB microcontroller, which generates the I²C signals necessary
to communicate with the AD5933.The user interfaces to the USB
microcontroller through a Visual Basic® graphic user interface
located on and run from the user PC. More information on the
AD5933 is available from Analog Devices, Inc., at www.analog.com
and should be consulted when using the evaluation board.
FUNCTIONAL BLOCK DIAGRAM
IMPEDANCE UNDER TEST
VIN
VOUT _LK1
VBIAS
ADP3303
USB HUB
J1
LK2
LK6
LK7
VBIAS
USB
MICROCONTROLLER
J3
1 2 AMPLIFIER SUPPLY
(VDD-AMP)
J4
1 2 REFERENCE SUPPLY
(VDD-REF)
VOUT
VIN
RFB
SDA
AD5933
AVDD2
AVDD1
MCLK
SCL
AGND1,
AGND2
DVDD
DGND
ADR423
LK10 LK4 LK5
J6
1 2 _{ANALOG SUPPLY 2}
(AVDD-REF)
LK3
LK12
J5
1 2 _{ANALOG SUPPLY 1}
(AVDD-SIG)
CLK1
EXTERNAL CLOCK
CRYSTAL
J2
1 2 _{DIGITAL SUPPLY}
(DVDD_5V)
Figure 1. AD5933 Evaluation Board Block Diagram
Rev. PrC
Evaluation boards are only intended for device evaluation and not for production purposes.
Evaluation boards as supplied “as is” and without warranties of any kind, express, implied, or
statutory including, but not limited to, any implied warranty of merchantability or fitness for a
particular purpose. No license is granted by implication or otherwise under any patents or other
intellectual property by application or use of evaluation boards. Information furnished by Analog
Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog
Devices for its use, nor for any infringements of patents or other rights of third parties that may result
from its use. Analog Devices reserves the right to change devices or specifications at any time
without notice. Trademarks and registered trademarks are the property of their respective owners.
Evaluation boards are not authorized to be used in life support devices or systems.
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