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ADC3641 bảng dữ liệu(PDF) 51 Page - Texas Instruments

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tên linh kiện ADC3641
Giải thích chi tiết về linh kiện  ADC364x 14-bit, 10-MSPS to 65-MSPS, Low-Noise, Low Power Dual Channel ADC
PDF  77 Pages
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Trang chủ  http://www.ti.com
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ADC3641 bảng dữ liệu(HTML) 51 Page - Texas Instruments

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Figure 8-49. Register 0x11
7
6
5
4
3
2
1
0
0
0
SE A
SE B
0
DLL PDN
0
AZ EN
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
Table 8-20. Register 0x11 Field Descriptions
Bit
Field
Type
Reset
Description
7-6
0
R/W
0
Must write 0
5
SE A
R/W
0
This bit enables single ended analog input, channel A. In this
mode the SNR reduces by 3-dB.
0: Differential input
1: Single ended input
4
SE B
R/W
0
This bit enables single ended analog input, channel B. In this
mode the SNR reduces by 3-dB.
0: Differential input
1: Single ended input
3
0
R/W
0
Must write 0
2
DLL PDN
R/W
0
This register applies ONLY to the ADC3643. It powers down the
internal DLL, which is used to adjust the sampling time. This
register must only be enabled when operating at sampling rates
below 40 MSPS. When DLL PDN bit is enabled the sampling
time is directly dependent on sampling clock duty cycle (with a
50/50 duty the sampling time is TS/2).
0: Sampling time is TS/ 4
1: Sampling time is TS/2 (only for sampling rates below 40
MSPS).
1
0
R/W
0
Must write 0
0
AZ EN
R/W
0/1
This bit enables the internal auto-zero circuitry. It is enabled by
default for the ADC3641/42 and disabled for the ADC3643.
0: Auto-zero disabled
1: Auto-zero enabled
Figure 8-50. Register 0x13
7
6
5
4
3
2
1
0
0
0
0
0
0
0
E-FUSE LD
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
Table 8-21. Register 0x13 Field Descriptions
Bit
Field
Type
Reset
Description
7-1
0
R/W
0
Must write 0
0
E-FUSE LD
R/W
0
This register bit loads the internal bit mapping for different
interfaces. After setting the interface in register 0x07, this E-
FUSE LD bit needs to be set to 1 and reset to 0 for loading to go
into effect. Register 0x07 along with the E-Fuse Load (0x12, D0)
needs to be loaded first in the programming sequence since the
E-Fuse load resets the SPI writes.
0: E-FUSE LOAD set
1: E-FUSE LOAD reset
www.ti.com
ADC3643
SBAS886 – OCTOBER 2020
Copyright © 2020 Texas Instruments Incorporated
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Product Folder Links: ADC3643



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