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ES9842PRO 데이터시트(PDF) 33 Page - ESS Technology,Inc

부품명 ES9842PRO
상세설명  32-bit High-Performance 4-Channel ADC
PDF  167 Pages
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제조업체  ESS [ESS Technology,Inc]
홈페이지  http://www.esstech.com
Logo ESS - ESS Technology,Inc

ES9842PRO 데이터시트(HTML) 33 Page - ESS Technology,Inc

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VERSION 0.5
ESS TECHNOLOGY, INC. 109 Bonaventura Drive, San Jose, CA 95134, USA Tel (408) 643-8800 WWW.ESSTECH.COM
ES9842 PRO Product Datasheet
33
64FS Mode
When 64FS (MCLK/FS ratio) is required, it is necessary for the ES9826 to be running in 64FS Mode. 64FS Mode can be
manually entered by setting Register 0[3] ENABLE_64FS_MODE to 1’b1.
• Register 0[3] ENABLE_64FS_MODE
o
Use for 64FS ratios, including 705.6/768kHz sample rates
This mode enables the Minimum phase 64FS filter. See filter properties below.
Note: 64FS mode is not supported in Hardware mode (HW).
Minimum Phase 64FS Latency
The following table shows the simulated latency at 705.6kHz sampling rate. The latency was measured at the peak
amplitude of the impulse response prior to being down-sampled to 1FS. Latency delay will reduce (scale) with sampling
rate.
Digital Filter
Delay(us) @
fs= 705.6 kHz
Minimum Phase 64FS
9.2 us
Table 7 – Minimum Phase 64FS Delay
Minimum Phase 64FS Properties
Minimum Phase 64FS
Parameter
Conditions
MIN
TYP
MAX
UNIT
Pass band
-3 dB
0.55 x fs
Hz
Stop band
-100 dB
0.91 x fs
Hz
Group Delay
2.24/fs
4.03/fs
s
Flatness (ripple)
-
dB
Table 8 – Minimum Phase 64FS Properties



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