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參數資料
型號: AD7725BS
廠商: ANALOG DEVICES INC
元件分類: ADC
英文描述: 16-Bit 900 kSPS ADC with a Programmable Postprocessor
中文描述: 1-CH 16-BIT DELTA-SIGMA ADC, SERIAL/PARALLEL ACCESS, PQFP44
封裝: PLASTIC, MS-022-AB, MQFP-44
文件頁數: 4/28頁
文件大小: 442K
代理商: AD7725BS
REV. A
–4–
AD7725
Preset Filter, Default Filter, and Postprocessor Characteristics
1, 2
Parameter
Test Conditions/Comments
Min
Typ
Max
Unit
DIGITAL FILTER RESPONSE
PRESET FIR
Data Output Rate
Stop-Band Attenuation
Low-Pass Corner Frequency
Group Delay
Settling Time
3
f
CLKIN
/8
Hz
dB
Hz
s
s
70
f
CLKIN
/16
133/(2 f
CLKIN
)
133/f
CLKIN
DEFAULT FILTER
Number of Taps
Frequency Response
0 kHz to f
/546.08
f
CLKIN
/195.04
f
CLKIN
/184.08
f
/133.2 to f
CLKIN
/2
Group Delay
3
Settling Time
3
Output Data Rate, f
O
Internal FIR Filter Stored in ROM
106
±
0.001
dB
dB
dB
dB
s
s
Hz
–3
–6
–120
2141/(2
f
CLKIN
)
2141/f
f
CLKIN
/32
POSTPROCESSOR CHARACTERISTICS
Input Data Rate
Coefficient Precision
4
Arithmetic Precision
Number of Taps Permitted
Decimation Factor
Number of Decimation Stages
Output Data Rate
f
CLKIN
/8
Hz
Bits
Bits
24
30
108
256
5
f
CLKIN
/16
2
1
f
CLKIN
/4096
Hz
NOTES
1
These characteristics are fixed by the design.
2
f
CLKIN
is the CLKIN frequency.
3
See Terminology section.
4
See the Configuration File Format section for more information.
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