EVAL-AD7654CBZ Analog Devices Inc, EVAL-AD7654CBZ Datasheet

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EVAL-AD7654CBZ

Manufacturer Part Number
EVAL-AD7654CBZ
Description
BOARD EVALUATION FOR AD7654
Manufacturer
Analog Devices Inc
Series
PulSAR®r
Datasheets

Specifications of EVAL-AD7654CBZ

Number Of Adc's
2
Number Of Bits
16
Sampling Rate (per Second)
500k
Data Interface
Serial, Parallel
Inputs Per Adc
2 Differential
Input Range
0 ~ 5 V
Power (typ) @ Conditions
120mW @ 500kSPS
Voltage Supply Source
Analog and Digital
Operating Temperature
-40°C ~ 85°C
Utilized Ic / Part
AD7654
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Preliminary Technical Data
FEATURES
Converter and Evaluation Development (EVAL-CED1Z) and
Control Board (EVAL-CONTRL BRDxZ) compatibility
Versatile analog signal conditioning circuitry
On-board reference, clock oscillator and buffers
Buffered 14, 16 (or 18) bit parallel outputs
Buffered serial port interface
Ideal for DSP and data acquisition card interfaces
Analog and digital prototyping area
PC software for control and data analysis
GENERAL DESCRIPTION
The EVAL-AD76XXCBZ is an evaluation board for the 48 lead
AD761X, AD762X, AD763X, AD764X, AD765X, AD766X,
AD767X and AD795X 14-bit, 16-bit and 18- bit PulSAR
analog to digital converter (ADC) family. These low power,
successive approximation register (SAR) architecture ADCs (see
ordering guide for product list ) offer very high performance
with 100kSPS to 3MSPS throughput rate range with a flexible
parallel or serial interface. The evaluation board is designed to
demonstrate the ADC's performance and to provide an easy to
understand interface for a variety of system applications. A full
description of the AD761X, AD762X, AD763X, AD764X,
AD765X, AD766X, AD767X and AD795X is available in the
Rev. PrA
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. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
Reference/Buffer
Analog Inputs
PulSAR ADC
Supplies
Evaluation Board For AD761x,762x/AD763x
AD764x/AD765x/AD766x/AD767x/AD795x
®
Figure 1. Evaluation Board
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
Analog Devices data sheets and should be consulted when
utilizing this evaluation board.
The evaluation board is ideal for use with either Analog Devices
Converter and Evaluation Development EVAL-CED1Z, (CED)
or Evaluation Control Board EVAL-CONTRL BRDxZ (ECB)
capture boards, or as a stand-alone system. The design offers the
flexibility of applying external control signals and is capable of
generating conversion results on parallel 14-bit, 16-bit or 18-bit
wide buffered outputs.
On-board components include a high precision band gap
reference, (AD780, ADR431, or ADR435), reference buffers, a
signal conditioning circuit with two op-amps and digital logic.
The EVAL-AD76xxCBZ interfaces to the capture board with a
96-pin DIN connector. A 40-pin IDC connector is used for
parallel output, and test points are provided for the serial port.
SMB connectors are provided for the low noise analog signal
source, and for an externally generated CNVST (convert start
input.
The term AD76XX-48 is used in this document to represent all
the 48 lead PulSAR ADCs listed in the ordering guide. CED is
used for the EVAL-CED1Z and ECB is used for the EVAL-
CONTROL BRDxZ capture boards.
External CNVST
©2007 Analog Devices, Inc. All rights reserved.
EVAL-AD76XXCBZ
96-Pin CED/ECB
Interface
www.analog.com

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EVAL-AD7654CBZ Summary of contents

Page 1

... CNVST (convert start input. The term AD76XX-48 is used in this document to represent all the 48 lead PulSAR ADCs listed in the ordering guide. CED is used for the EVAL-CED1Z and ECB is used for the EVAL- CONTROL BRDxZ capture boards. External CNVST Figure 1. Evaluation Board One Technology Way, P ...

Page 2

... Conversion Control/Master Clock............................................. 3 Analog Input ................................................................................. 3 Power Supplies and Grounding .................................................. 3 Using the Eval-AD762X/AD765X/AD766X/ AD767XCBZ as Stand-Alone................................................................................... 3 Schematics/PCB Layout............................................................... 4 Supplying Power for Stand-Alone use ....................................... 4 Evaluation Board Setting for Bipolar ADC Input Configurations .............................................................................. 4 LIST OF FIGURES Figure 1. Evaluation Board .............................................................. 1 Figure 2. Schematic, Analog .......................................................... 10 Figure 3. Schematic, Digital........................................................... 11 Figure 4. Schematic, Power ............................................................ 12 Figure 5 ...

Page 3

... Thus, the digital bus is not tri-stated in this mode of operation and BD[0:15] will continuously be updated after a new conversion. BD[0:15] is available on P2 after BUSY goes HIGH. Note that with the 18 bit devices the full 18 bits of data BD[-2:15] are output directly on P2 since the evaluation board Rev. PrA | Page EVAL-AD76XXCBZ * ...

Page 4

... INA-IND inputs with the available solder pads. iCMOS ADCs For the AD7610, AD7612, AD7631 AD7634 and AD7951, the evaluation board can use all input ranges since the input range is controlled by software (or S16 DIP switches in stand-alone mode). For operating in unipolar mode for any of the bipolar ...

Page 5

... IEEE 1284 Compliant Parallel Port Cable (if not supplied) Connect the control board supplied mini plug to the 14V AC source. Connect the evaluation board to the controller board and connect the parallel port cable to the evaluation board and to the PC. Proceed to the Software Installation section to install the software. ...

Page 6

... AC test, apply a sinusoidal signal to the evaluation board at the SMB inputs J1 for IN+ and J2 for IN-. Low distortion, better than 100dB, is required to allow true evaluation of the part. One possibility is to filter the input signal from the AC source. There is no suggested bandpass filter but consideration should be taken in the choice. Furthermore, if ...

Page 7

... Rev. PrA | Page EVAL-AD76XXCBZ Analog Input Type SE SE Diff, Unipolar Diff, Unipolar Diff, Unipolar Diff, Unipolar Diff Diff Diff, Unipolar Diff, Unipolar SE, Unipolar SE, Unipolar SE, Unipolar SE, Unipolar ...

Page 8

... Buffer amplifier positive supply: Selection of +12V, +5V or AVDD when using EVAL-CONTROL- BRDX or voltages on SJ1 in stand alone mode. 1 ADC digital supply voltage: Selection of +2.5V or VDIG (+5V) when using EVAL-CONTROL- BRDX or voltage on SJ2 in stand-alone mode. 1 ADC analog supply voltage: Selection of +2.5V, +5V or EXT when using EVAL-CONTROL-BRDX Reference buffer: BUFF = use U2 to buffer or amplify reference source ...

Page 9

... Internal reference bandgap supply. Connected to AVDD via s19. Direct ADC serial data. Direct ADC serial clock. Direct ADC serial SYNC. Direct ADC serial read error. Manf. Part No. Pasternack PE4177 3M 2540-6002UB ERNI 533402 Rev. PrA | Page EVAL-AD76XXCBZ ...

Page 10

... EVAL-AD76XXCBZ GND 2 +VIN 2 DGND 17 DGND 20 AGND 1 AVDD 2 DVDD 19 OVDD 2.5/3v 8 GND 4 Figure 2. Schematic, Analog Rev. PrA | Page Preliminary Technical Data A/B OB/2C 5 WARP 6 IMPULSE 7 SER/PAR 8 RESET 33 P BYTESWA ...

Page 11

... Preliminary Technical Data 3.3V 103 3.3V 77 3.3V 31 3.3V GND 6 102 VIO GND 127 90 VIO GND 104 76 VIO GND 91 54 VIO GND 78 30 VIO GND 55 18 VIO GND 32 5 VIO GND 19 126 VIO 7 Figure 3. Schematic, Digital Rev. PrA | Page EVAL-AD76XXCBZ ...

Page 12

... EVAL-AD76XXCBZ Preliminary Technical Data SD 6 GND GND GND 5 5 Figure 4. Schematic, Power Rev. PrA | Page ...

Page 13

... Preliminary Technical Data Figure 5. Top Side Silk-Screen Figure 6. Top Layer Rev. PrA | Page EVAL-AD76XXCBZ ...

Page 14

... EVAL-AD76XXCBZ Preliminary Technical Data Figure 7. Ground Layer Figure 8. Shield Layer Rev. PrA | Page ...

Page 15

... Preliminary Technical Data a Figure 9. Bottom Side Layer Figure 10. Bottom Side Silk-Screen Rev. PrA | Page EVAL-AD76XXCBZ ...

Page 16

... CED.exe software. 1. The arrow is used to start the software. When running is displayed. 2. The part to be evaluated is selected here. 3. The controls are used to set: Sample Frequency – units can be used such as 3M (case sensitive) for 3,000,000 Hz. Clock Source - for FPGA. Selections between capture board or evaluation board. Cnv Mode – ...

Page 17

... Figure 12. Context Help , precision, color, etc. Displays the cursor. Is used For zooming in and out. Is used for panning. rescale the axes to the type, colors, lines, etc. Rev. PrA | Page EVAL-AD76XXCBZ 2 are used to set axes properties such as format, Is used to set various graph properties such as graph ...

Page 18

... EVAL-AD76XXCBZ 3 1. These radio buttons are used to perform a Single Capture or Continuous Capture of data set in the # of Samples field. The results are displayed in the chart. Note that the results can be displayed as Figure 13. Histogram Screen 2., 3.These display the statistics for the X and Y-axes, respectively. ...

Page 19

... Preliminary Technical Data The charts can be displayed together when the Figure 14. Summary tab is selected. Rev. PrA | Page EVAL-AD76XXCBZ ...

Page 20

... EVAL-AD76XXCBZ Displays the FFT when the Spectrum chart is selected 2., 3. Display the data for the X and Y-axes, respectively. . Figure 15. FFT Spectrum 2 Rev. PrA | Page Preliminary Technical Data ...

Page 21

... Preliminary Technical Data 1 1. Time domain data can be viewed with the oscilloscope also. Figure 16 .Oscilloscope Rev. PrA | Page EVAL-AD76XXCBZ ...

Page 22

... EVAL-AD76XXCBZ detailed in the Decimated AC Testing section. 2. The Decimation Ratio is the over-sampling ratio. Note that for every power of 4, the effective resolution increases by 6dB or 1 bit (power of 10, increases by 10dB). Preliminary Technical Data 2 Figure 17 .Decimated FFT 3 3. The Nyquist frequency is displayed as: ...

Page 23

... Files\Analog Devices\Hi-res ADC’s x.x\ADC.exe software. 1. The arrow is used to start the software. When running is displayed. 2. The part to be evaluated is selected here. 3. The controls are used to set: Sampling Frequency – Slect the up/donw arrows or enter a value (which will be rounded). Clock Source - for FPGA. Selections between DSP capture board or local to the evaluation board. Cnv Mode – ...

Page 24

... EVAL-AD76XXCBZ The results are displayed in this chart. Also, the cursor (yellow) can be dragged desired location where the X-axis values and the Y-axis value will be displayed. 2. Different measurements are displayed here. The DC value, Transition Noise and other values such as the ADC range and LSB value in Volts ...

Page 25

... AC test results are displayed here. Also the choice of viewing the amplitude of a certain FFT component can be selected from the FFT component menu. 2. Choice of either a Kaiser window or a Blackmann-Harris window from the is menu. Figure 20. FFT Screen 1 2 Rev. PrA | Page EVAL-AD76XXCBZ ...

Page 26

... EVAL-AD76XXCBZ 1 1. The AC test can also be displayed in the Time Domain. To view the Time domain output, select Time in this menu. Preliminary Technical Data Figure 21. Time-Domain Screen Rev. PrA | Page ...

Page 27

... Figure 22. Decimated (Averaging) Screen 3. AC test results with decimated averaging are shown here. The SNR indicator also represents the dynamic range when no signal is present. 4. The Nyquist frequency is displayed as SAMPLE F NYQUIST 2 * Rev. PrA | Page EVAL-AD76XXCBZ 4 D RATIO 1 2 ...

Page 28

... EVAL-AD76XXCBZ Figure 23. Serial Programmable Port (SPP) Screen (AD7610/7612/7631/7634/7951/7952 only This selects the Serial Programmable Port 2. This selects the interface mode. Any of the four serial modes can be used to program the ADC through the Serial Programmable Port 3. This selects the input range configured through the Serial Programmable Port (SPP)or hardware pins ...

Page 29

... EVAL-AD7622CBZ AD7622BSTZ/BCPZ EVAL-AD7623CBZ AD7623ASTZ/ACPZ EVAL-AD7631CBZ AD7631ASTZ/ACPZ EVAL-AD7634CBZ AD7634ASTZ/ACPZ EVAL-AD7641CBZ AD7641BSTZ/BCPZ EVAL-AD7643CBZ AD7643BSTZ/BCPZ EVAL-AD7650CBZ AD7650ASTZ/ACPZ EVAL-AD7651CBZ AD7651ASTZ/ACPZ EVAL-AD7652CBZ AD7652ASTZ/ACPZ EVAL-AD7653CBZ AD7653ASTZ/ACPZ EVAL-AD7654CBZ AD7654ASTZ/ACPZ EVAL-AD7655CBZ AD7655ASTZ/ACPZ EVAL-AD7660CBZ AD7660ASTZ/ACPZ EVAL-AD7661CBZ AD7661ASTZ/ACPZ EVAL-AD7663CBZ AD7663ASTZ/ACPZ EVAL-AD7664CBZ AD7664ASTZ/ACPZ EVAL-AD7665CBZ AD7665ASTZ/ACPZ EVAL-AD7666CBZ AD7666ASTZ/ACPZ EVAL-AD7667CBZ AD7667ASTZ/ACPZ EVAL-AD7671CBZ AD7671ASTZ/ACPZ EVAL-AD7674CBZ ...

Page 30

... EVAL-AD76XXCBZ NOTES ©2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. PR07201-0-11/07(PrA) Preliminary Technical Data Rev. PrA | Page ...

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