Datasheet

AD1938 Data Sheet
Rev. E | Page 6 of 32
DIGITAL FILTERS
Table 6.
Parameter Mode Factor Min Typ Max Unit
ADC DECIMATION FILTER
All modes, typical @ 48 kHz
Pass Band 0.4375 f
S
21 kHz
Pass-Band Ripple ±0.015 dB
Transition Band 0.5 f
S
24 kHz
Stop Band 0.5625 f
S
27 kHz
Stop-Band Attenuation 79 dB
Group Delay 22.9844/f
S
479 µs
DAC INTERPOLATION FILTER
Pass Band
48 kHz mode, typical @ 48 kHz
0.4535 f
S
22
kHz
96 kHz mode, typical @ 96 kHz 0.3646 f
S
35 kHz
192 kHz mode, typical @ 192 kHz 0.3646 f
S
70 kHz
Pass-Band Ripple 48 kHz mode, typical @ 48 kHz ±0.01 dB
96 kHz mode, typical @ 96 kHz ±0.05 dB
192 kHz mode, typical @ 192 kHz ±0.1 dB
Transition Band 48 kHz mode, typical @ 48 kHz 0.5 f
S
24 kHz
96 kHz mode, typical @ 96 kHz 0.5 f
S
48 kHz
192 kHz mode, typical @ 192 kHz 0.5 f
S
96 kHz
Stop Band 48 kHz mode, typical @ 48 kHz 0.5465 f
S
26 kHz
96 kHz mode, typical @ 96 kHz 0.6354 f
S
61 kHz
192 kHz mode, typical @ 192 kHz 0.6354 f
S
122 kHz
Stop-Band Attenuation 48 kHz mode, typical @ 48 kHz 70 dB
96 kHz mode, typical @ 96 kHz 70 dB
192 kHz mode, typical @ 192 kHz 70 dB
Group Delay 48 kHz mode, typical @ 48 kHz 25/f
S
521 µs
96 kHz mode, typical @ 96 kHz 11/f
S
115 µs
192 kHz mode, typical @ 192 kHz 8/f
S
42 µs