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AD7725 Datasheet(PDF) 4 Page - Analog Devices

Part # AD7725
Description  16-Bit 900 kSPS ADC with a Programmable Postprocessor
PDF  28 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7725 Datasheet(HTML) 4 Page - Analog Devices

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REV. A
–4–
AD7725
Preset Filter, Default Filter, and Postprocessor Characteristics1, 2
Parameter
Test Conditions/Comments
Min
Typ
Max
Unit
DIGITAL FILTER RESPONSE
PRESET FIR
Data Output Rate
f
CLKIN/8
Hz
Stop-Band Attenuation
70
dB
Low-Pass Corner Frequency
f
CLKIN/16
Hz
Group Delay
3
133/(2
f
CLKIN)s
Settling Time
3
133/f
CLKIN
s
DEFAULT FILTER
Internal FIR Filter Stored in ROM
Number of Taps
106
Frequency Response
0 kHz to f
CLKIN/546.08
±0.001
dB
f
CLKIN/195.04
–3
dB
f
CLKIN/184.08
–6
dB
f
CLKIN/133.2 to fCLKIN/2
–120
dB
Group Delay
3
2141/(2
f
CLKIN)s
Settling Time
3
2141/f
CLKIN
s
Output Data Rate, f
O
f
CLKIN/32
Hz
POSTPROCESSOR CHARACTERISTICS
Input Data Rate
f
CLKIN/8
Hz
Coefficient Precision
4
24
Bits
Arithmetic Precision
30
Bits
Number of Taps Permitted
108
Decimation Factor
2
256
Number of Decimation Stages
1
5
Output Data Rate
f
CLKIN/4096
f
CLKIN/16
Hz
NOTES
1These characteristics are fixed by the design.
2f
CLKIN is the CLKIN frequency.
3See Terminology section.
4See the Configuration File Format section for more information.



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