參數(shù)資料
型號: AD9637-80EBZ
廠商: Analog Devices Inc
文件頁數(shù): 29/40頁
文件大小: 0K
描述: BOARD EVAL FOR AD9637
標(biāo)準(zhǔn)包裝: 1
系列: *
Data Sheet
AD9637
Rev. A | Page 35 of 40
Output Phase (Register 0x16)
Bit 7—Open
Bits[6:4]—Input Clock Phase Adjust
When the clock divider (Register 0x0B) is used, the applied
clock is at a higher frequency than the internal sampling
clock. Bits[6:4] determine at which phase of the external
clock sampling occurs. This is only applicable when the
clock divider is used. Selecting Bits[6:4] greater than
Register 0x0B Bits[2:0] is prohibited.
Table 19. Input Clock Phase Adjust Options
Input Clock Phase
Adjust, Bits[6:4]
Number of Input Clock Cycles of
Phase Delay
000 (Default)
0
001
1
010
2
011
3
100
4
101
5
110
6
111
7
Bits[3:0]—Output Clock Phase Adjust
Table 20. Output Clock Phase Adjust Options
Output Clock (DCO),
Phase Adjust, Bits[3:0]
DCO Phase Adjustment
(Degrees Relative to D± x Edge)
0000
0
0001
60
0010
120
0011 (Default)
180
0100
240
0101
300
0110
360
0111
420
1000
480
1001
540
1010
600
1011
660
Resolution/Sample Rate Override (Register 0x100)
This register is designed to allow the user to downgrade the device.
Any attempt to upgrade the default speed grade results in a chip
power-down. Settings in this register are not initialized until Bit 0
of the transfer register (Register 0xFF) is written high.
User I/O Control 2 (Register 0x101)
Bits[7:1]—Open
Bit 0—SDIO Pull-Down
Bit 0 can be set to disable the internal 30 kΩ pull-down on the
SDIO pin, which can be used to limit loading when many
devices are connected to the SPI bus.
User I/O Control 3 (Register 0x102)
Bits[7:4]—Open
Bit 3—VCM Power-Down
Bit 3 can be set high to power down the internal VCM generator.
This feature is used when applying an external reference.
Bits[2:0]—Open
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