參數(shù)資料
型號(hào)： AD1801
廠商： Analog Devices, Inc.
英文描述： Single-Chip Fax/Data/ Voice Modem(單片的傳真/數(shù)據(jù)/語音調(diào)制解調(diào)器)
中文描述： 單芯片傳真/數(shù)據(jù)/語音調(diào)制解調(diào)器（單片的傳真/數(shù)據(jù)/語音調(diào)制解調(diào)器）
文件頁數(shù)： 5/52頁
文件大?。?/td> 348K
代理商： AD1801
–5–
REV. 0
AD1801
DIGITAL DECIMATION AND INTERPOLATION FILTERS—MODEM MODE 0
Min
Typ
Max
0.445
×
F
S
0.490
×
F
S
–0.17
0.555
×
F
S
Units
Passband Edge (–0.220 dB Point)
Passband (–3.0 dB Point)
Passband Ripple
Transition Band
Stopband Edge
1
Stopband Rejection (Plus 3 dB Rolloff)
Group Delay
Group Delay Variation Over Passband
Sample Rate
0
0
0
0.445
×
F
S
0.555
×
F
S
78.0
Hz
Hz
dB
Hz
Hz
dB
s
μ
s
kHz
19/F
S
0.0
48
DIGITAL DECIMATION AND INTERPOLATION FILTERS—MODEM MODE 1
Min
Typ
Max
0.400
×
F
S
0.453
×
F
S
–0.24
0.555
×
F
S
Units
Passband Edge (–0.24 dB Point)
Passband (–3.0 dB Point)
Passband Ripple
Transition Band
Stopband Edge
2
Stopband Rejection (Plus 3 dB Rolloff)
Group Delay
Group Delay Variation Over Passband
Sample Rate
0
0
0
0.400
×
F
S
0.555
×
F
S
52.8
Hz
Hz
dB
Hz
Hz
dB
s
μ
s
kHz
10/F
S
0.0
48
DIGITAL DECIMATION AND INTERPOLATION FILTERS—AUDIO MODE
Min
Typ
Max
0.400
×
F
S
0.462
×
F
S
–0.18
0.600
×
F
S
Units
Passband Edge (–0.18 dB Point)
Passband (–3.0 dB Point)
Passband Ripple
Transition Band
Stopband Edge
3
Stopband Rejection (Plus 3 dB Rolloff)
Group Delay
Group Delay Variation Over Passband
Sample Rate
0
0
0
0.400
×
F
S
0.600
×
F
S
78.0
Hz
Hz
dB
Hz
Hz
dB
s
μ
s
kHz
11/F
S
0.0
48
DIGITAL INTERPOLATION FILTERS—MONITOR SPEAKER
Min
Typ
Max
0.350
×
F
S
0.412
×
F
S
–0.74
0.650
×
F
S
Units
Passband Edge (–0.74 dB Point)
Passband (–3.0 dB Point)
Passband Ripple
Transition Band
Stopband Edge
4
Stopband Rejection (Plus 12 dB Rolloff)
Group Delay
Group Delay Variation Over Passband
Sample Rate
0
0
0
0.350
×
F
S
0.650
×
F
S
55.5
Hz
Hz
dB
Hz
Hz
dB
s
μ
s
kHz
10/F
S
0.0
48
NOTES
1
The stopband repeats itself at multiples of 64
×
F
S
where F
S
is the sampling frequency. Thus the modem mode 0 digital filter will attenuate to –78.0 dB or better
across the frequency spectrum, except for a range
±
0.555
×
F
S
wide at multiples of 64
×
F
S
.
2
The stopband repeats itself at multiples of 64
×
F
S
where F
S
is the sampling frequency. Thus the modem mode 1 digital filter will attenuate to –52.8 dB or better
across the frequency spectrum, except for a range
±
0.555
×
F
S
wide at multiples of 64
×
F
S
.
3
The stopband repeats itself at multiples of 64
×
F
S
where F
S
is the sampling frequency. Thus the audio mode digital filter will attenuate to –78.0 dB or better across
the frequency spectrum, except for a range
±
0.600
×
F
S
wide at multiples of 64
×
F
S
.
4
The stopband repeats itself at multiples of 64
×
F
S
where F
S
is the sampling frequency. Thus the audio mode digital filter will attenuate to –55.5 dB or better across
the frequency spectrum, except for a range
±
0.650
×
F
S
wide at multiples of 64
×
F
S
.
Specifications subject to change without notice.
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