Datasheet

AD1937
Rev. B | Page 7 of 36
DIGITAL FILTERS
Table 7.
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