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参数资料
| 型号： | AD9858/PCBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 16/32页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR AD9858 |
| 产品培训模块： | Direct Digital Synthesis Tutorial Series (1 of 7): Introduction Direct Digital Synthesizer Tutorial Series (7 of 7): DDS in Action Direct Digital Synthesis Tutorial Series (3 of 7): Angle to Amplitude Converter Direct Digital Synthesis Tutorial Series (6 of 7): SINC Envelope Correction Direct Digital Synthesis Tutorial Series (4 of 7): Digital-to-Analog Converter Direct Digital Synthesis Tutorial Series (2 of 7): The Accumulator |
| 设计资源： | Low Jitter Sampling Clock Generator for High Performance ADCs Using AD9958/9858 and AD9515 (CN0109) |
| 标准包装： | 1 |
| 主要目的： | 计时，直接数字合成（DDS） |
| 已用 IC / 零件： | AD9858/TL |
| 已供物品： | 板 |
| 其它名称： | AD9858/PCB AD9858/PCB-ND |
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AD9858
Rev. C | Page 23 of 32
Register
Address
(MSB)
(LSB)
Default
Name
Ser
Par
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value
Profile
Phase
Offset
Word 2
(POW2)
0x08
0x1A
Phase Offset Word 2[7:0]
2
0x1B
Not used
Phase Offset Word 2[13:8]
2
Frequency
Tuning
Word 3
(FTW3)
0x09
0x1C
Frequency Tuning Word 3[7:0]
3
0x1D
Frequency Tuning Word 3[15:8]
3
0x1E
Frequency Tuning Word 3[23:16]
3
0x1F
Frequency Tuning Word 3[31:24]
3
Phase
Offset
Word 3
(POW3)
0x0A
0x20
Phase Offset Word 3[7:0]
3
0x21
Not used
Phase Offset Word 3[13:8]
3
Reserved
0x0B
0x22
Reserved, do not write, leave at 0xFF
0xFE
N/A
0x23
Reserved, do not write, leave at 0xFF
0xFF
N/A
REGISTER BIT DESCRIPTIONS
Control Function Register (CFR)
The CFR comprises four bytes. CFR is used to control the
various functions, features, and modes of the AD9858. The
functionality of each bit follows. Note that the register bits are
identified according to their serial register bit locations beginning
with the most significant bit.
CFR[31:30]: Frequency Detect Mode Charge Pump Current
These bits are used to set the scale factor for the frequency
detect mode charge pump output current (see Table 7). The
charge pump delivers the scaled output current when the
control logic forces the charge pump into its frequency detect
operating mode. The charge pump’s baseline output current
(ICP0) is determined by the external CPISET resistor and is
given by
ICP0 = 1.24/CPISET
The recommended nominal value of the CPISET resistor is
2.4 kΩ, which yields a baseline current of 500 μA.
Table 7.
CFR[31:30]
Frequency Detect Mode
Charge Pump Scale Value
Notes
00
0
IOUT = 0 (default)
01
2
IOUT = 20 × ICP0
10
3
IOUT = 40 × ICP0
11
4
IOUT = 60 × ICP0
CFR[29:27]: Final Closed-Loop Mode Charge Pump
Current
These bits are used to set the scale factor for the final closed-
loop mode charge pump output current (see Table 8). The
charge pump delivers the scaled output current when the control
logic forces the charge pump into its final closed-loop mode.
Table 8.
CFR[29:27]
Final Closed-Loop Mode
Charge Pump Scale Value
Notes
0xx
0
IOUT = 0 (default)
100
1
IOUT = ICP0
101
2
IOUT = 2 × ICP0
110
3
IOUT = 3 × ICP0
111
4
IOUT = 4 × ICP0
CFR[26:24]: Wide Closed-Loop Mode Charge Pump
Current
These bits are used to set the scale factor for the wide closed-
loop charge pump output current (see Table 9). The charge
pump delivers the scaled output current when the control logic
forces the charge pump into its wide closed-loop operating mode.
Table 9.
CFR[26:24]
Wide Closed-Loop Mode
Charge Pump Scale Value
Notes
000
0
IOUT = 0 (default)
001
2
IOUT = 2 × ICP0
010
4
IOUT = 4 × ICP0
011
6
IOUT = 6 × ICP0
100
8
IOUT = 8 × ICP0
101
10
IOUT = 10 × ICP0
110
12
IOUT = 12 × ICP0
111
14
IOUT = 14 × ICP0
CFR[23]: Auto Clear Frequency Accumulator Bit
When CFR[23] = 0 (default), a new delta frequency word is
applied to the input of the accumulator and added to the
currently stored value.
When CFR[23] = 1, this bit automatically synchronously clears
(loads zeros into) the frequency accumulator for one cycle upon
reception of the FUD sequence indicator.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD9858TLPCB | 制造商:AD 制造商全称:Analog Devices 功能描述:1 GSPS Direct Digital Synthesizer |
| AD9858XSV | 制造商:Analog Devices 功能描述: |
| AD9859 | 制造商:AD 制造商全称:Analog Devices 功能描述:400 MSPS, 10-Bit, 1.8 V CMOS Direct Digital Synthesizer |
| AD9859/PCB | 制造商:Analog Devices 功能描述:NCO, 400MSPS 10 BIT, 1.8V CMOS DIRECT DGTL SYNTHESIZER - Bulk |
| AD9859/PCBZ | 功能描述:BOARD EVAL FOR AD9859 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:AgileRF™ 标准包装:1 系列:- 主要目的:电信，线路接口单元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要属性:T1/J1/E1 LIU 次要属性:- 已供物品:板，电源，线缆，CD 其它名称:82EBV2081 |
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