參數(shù)資料
型號(hào)： EVAL-AD5934EBZ
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 1/32頁(yè)
文件大?。?/td> 0K
描述： BOARD EVALUATION FOR AD5934
標(biāo)準(zhǔn)包裝： 1
主要目的： 計(jì)時(shí)，直接數(shù)字合成（DDS）
嵌入式： 否
已用 IC / 零件： AD5934
主要屬性： 12 位數(shù)模轉(zhuǎn)換器，24 位調(diào)節(jié)字寬
次要屬性： 16MHz 2.7 V ~ 5.5 V 圖形用戶界面
已供物品： 板，線纜，軟件
產(chǎn)品目錄頁(yè)面： 797 (CN2011-ZH PDF)
相關(guān)產(chǎn)品： AD5934YRSZ-ND - IC NTWK ANALYZER 12B 1MSP 16SSOP
AD5934YRSZ-REEL7-ND - IC CONV 12BIT 250KSPS 16SSOP
250 kSPS, 12-Bit Impedance Converter,
Network Analyzer
Data Sheet
Rev. C
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
2005–2012 Analog Devices, Inc. All rights reserved.
FEATURES
Programmable output peak-to-peak excitation voltage to a
maximum frequency of 100 kHz
Programmable frequency sweep capability with serial I2C
interface
Frequency resolution of 27 bits (<0.1 Hz)
Impedance measurement range from 1 k to 10 M
Capable of measuring 100 to 1 k with additional circuitry
Phase measurement capability
System accuracy of 0.5%
2.7 V to 5.5 V power supply operation
Temperature range: 40°C to +125°C
16-lead SSOP package
APPLICATIONS
Electrochemical analysis
Bioelectrical impedance analysis
Impedance spectroscopy
Complex impedance measurement
Corrosion monitoring and protection equipment
Biomedical and automotive sensors
Proximity sensing
Nondestructive testing
Material property analysis
Fuel/battery cell condition monitoring
GENERAL DESCRIPTION
The AD5934 is a high precision impedance converter system
solution that combines an on-board frequency generator with a
12-bit, 250 kSPS, analog-to-digital converter (ADC). The
frequency generator allows an external complex impedance to
be excited with a known frequency. The response signal from
the impedance is sampled by the on-board ADC and a discrete
Fourier transform (DFT) is processed by an on-board DSP
engine. The DFT algorithm returns a real (R) and imaginary (I)
data-word at each output frequency.
Once calibrated, the magnitude of the impedance and relative
phase of the impedance at each frequency point along the sweep
is easily calculated using the following two equations:
Magnitude =
2
I
R +
Phase = tan1(I/R)
A similar device, available from Analog Devices, Inc., is the
AD5933, which is a 2.7 V to 5.5 V, 1 MSPS, 12-bit impedance
converter, with an internal temperature sensor, available in a
16-lead SSOP.
FUNCTIONAL BLOCK DIAGRAM
ADC
(12 BITS)
VDD/2
DDS
CORE
(27 BITS)
DAC
VBIAS
Z(ω)
I2C
INTERFACE
IMAGINARY
REGISTER
GAIN
REAL
REGISTER
1024-POINT DFT
LPF
SCL
SDA
DVDD
AVDD
MCLK
AGND
DGND
ROUT
VOUT
AD5934
RFB
VIN
05325-
001
Figure 1.
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