EVAL-AD7685CB Analog Devices Inc, EVAL-AD7685CB Datasheet - Page 4

• Manufacturer Part Number: EVAL-AD7685CB
• Description: BOARD EVAL FOR AD7685
• Manufacturer: Analog Devices Inc
• Series: PulSAR®r

Specifications of EVAL-AD7685CB

• Number Of Adc's: 1
• Number Of Bits: 16
• Sampling Rate (per Second): 250k
• Data Interface: Serial
• Inputs Per Adc: 1 Differential
• Input Range: ±VREF
• Power (typ) @ Conditions: 10mW @ 250kSPS
• Voltage Supply Source: Single
• Operating Temperature: -40°C ~ 85°C
• Utilized Ic / Part: AD7685
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

EVAL-AD768x/AD769x/AD794xCB
and follow the installation instructions.
Developing your own application using LabVIEW
You need LabVIEW 7.1 or above to do this. Install the
executable first, copy the folder LabVIEW VI and run the ADC
vi example.vi
Testing Methods
Histogram
To perform a histogram test, apply a DC signal to the input. It is
advised to filter the signal to make the DC Source noise
compatible with that of the ADC. C26 and C41 provide this
filtering.
AC Testing
To perform an AC test, apply a sinusoidal signal to the
evaluation board. 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
band-pass filter but consideration should be taken in the choice.
Decimated Testing (Averaging)
This test can be run with a shorted input to evaluate dynamic
range or as the AC test.
Setup Requirements
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EVAL-CONTROL BRDx (ADSP2189)
Evaluation board
Power supply (AC 12V/1A source could be bought from
Analog Devices – sold separately from the EVAL-
CONTROL BRDx)
Parallel port cable (provided with the evaluation control
board)
AC source (low distortion)
DC source (low noise)
Band-pass filter (value based on the signal frequency, low
distortion)
Rev. Pr F | Page 4 of 18
Use as a Standalone Evaluation Board
You have the option of using the EVAL-AD768x/AD769x/
AD794xCB as a stand-alone evaluation board. This method
does not require the EVAL-CONTROL BRDx, nor does it
require use of the accompanied software. The ADC serial
interface signals are available on P1 (26-pin connector).
Preliminary Technical Data