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參數(shù)資料
| 型號： | AD9958 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 2-Channel 500 MSPS DDS with 10-Bit DACs |
| 中文描述： | 雙通道500 MSPS的DDS的10位DAC |
| 文件頁數(shù)： | 21/40頁 |
| 文件大?。?/td> | 1051K |
| 代理商： | AD9958 |
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AD9958
Table 7.
Modulation Level Bits FR1 <9:8>
0
0
1
1
Rev. 0 | Page 21 of 40
Description
2-level modulation
4-level modulation
8-level modulation
16-level modulation
0
1
0
1
When modulating, the RU/RD function can be limited based
on pins available for controlling the feature. SDIO pins are for
RU/RD only, not modulation.
Table 8.
RU/RD Bits
FR1 <11:10>
Description
0
0
RU/RD disabled.
0
1
Only profile Pin 2 and Pin 3 available for RU/RD
operation.
1
0
Only profile Pin 3 available for RU/RD
operation.
1
1
Only SDIO Pins 1, 2, and 3 available for RU/RD
operation. Forces the serial I/O to only be used
in 1-bit mode.
If profile pins are used for RU/RD, Logic 0 is for ramp-up and
Logic 1 is for ramp-down.
Because of the two channels and limited data pins, it is
necessary to assign the profile pins and/or SDIO_1:3 pins to a
dedicated channel. This is controlled by the profile pin
configuration or PPC bits (FR1 <14:12>). Each modulation
description to follow incorporates data pin assignments.
2-Level Modulation—No RU/RD
Modulation level bits are set to 00 (2-level). AFP bits are set to
the desired modulation type. RU/RD bits and the linear sweep
bit are disabled. Table 9 displays how the profile pins and
channels are assigned.
Table 9.
Profile Pin
Configuration(PPC)
Bits FR1<14:12>
P0
P1
x
x
x
N/A
N/A CH0 CH1 2-level
P2
P3
Description
mode both
channels,
no RU/RD
As shown in Table 9, only Profile Pin P2 can be used to
modulate Channel 0. If the P2 pin is Logic 0, Register 0
(Register 0x04) is chosen; if the P2 pin is Logic 1, Register 1
(Register 0x0A) is chosen.
4-Level Modulation—No RU/RD
Modulation level bits are set to 01 (4-level). AFP bits are set to
the desired modulation type. RU/RD bits and the linear sweep
bit are disabled. Table 10 displays how the profile pins and
channels are assigned to each other.
Table 10.
Profile Pin
Config. (PPC)
Bits FR1
<14:12>
1
0
P0
CH0
P1
CH0
P2
CH1
P3
CH1
Description
4-level modulation
on CH0 and CH1,
no RU/RD
1
For this condition, the profile register chosen is based on the
two bit value presented to profile pins <P0:P1> or <P2:P3>.
For example, if PPC = 101, <P0:P1>= 11, and <P2:P3>= 01,
then the contents of Profile Register 3 of Channel 0 are
presented to Channel 0’s output and the contents of Profile
Register 1 of Channel 1 are presented to Channel 1’s output.
8-Level Modulation—No RU/RD
Modulation level bits are set to 10 (8-level). AFP bits are set to a
nonzero value. RU/RD bits and the linear sweep bit are
disabled. Note that the AFP bits of the three channels not being
used must be set to 00. Table 11 shows the assignment of profile
pins and channels.
Table 11.
Profile Pin
Config. Bits
FR1 <14:12>
P0
P1
x
1
0
CH0
CH0
P2
CH0
P3
x
Description
8-level modulation
on CH0, no RU/RD
8-level modulation
on CH1, no RU/RD
x
1
1
CH1
CH1
CH1
x
For this condition, the profile register (1 of 16) chosen is based
on the 3-bit value presented to the profile <P0-P2> pins. For
example, if PPC = X10 and <P0-P2> = 111, the contents of
Profile Register 7 of Channel 0 are presented to Channel 0.
16-Level Modulation—No RU/RD
Modulation level bits are set to 11 (16-level). AFP bits are set to
the desired modulation type. RU/RD bits and the linear sweep
bit are disabled. The AFP bits of the three channels not being
used must be set to 00. Table 12 displays how the profile pins
and channels are assigned.
Table 12.
Profile Pin
Config. (PPC) Bits
FR1 <14:12>
P0
P1
x
1
0
CH0
CH0
P2
CH0
P3
CH0
Description
16-level
modulation on
CH0, no RU/RD
16-level
modulation on
CH1, no RU/RD
x
1
1
CH1
CH1
CH1
CH1
For these conditions, the profile register chosen is based on
the 4-bit value presented to profile <P0-P3> pins. For example
if PPC = X11 and <P0-P3> = 1110, the contents of Profile
Register 14 of Channel 1 is presented to Channel 1.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD9958 PCB | 制造商:Analog Devices 功能描述:EVAL BOARD ((NS)) |
| AD9958/PCB | 制造商:Analog Devices 功能描述:Evaluation Board For 2-Channel 500 MSPS DDS With 10-Bit DACs 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Analog Devices 功能描述:IC 10-BIT DAC DDS |
| AD9958/PCBZ | 功能描述:BOARD EVALUATION FOR AD9958 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估演示板和套件 系列:AgileRF™ 標準包裝:1 系列:PSoC® 主要目的:電源管理，熱管理 嵌入式:- 已用 IC / 零件:- 主要屬性:- 次要屬性:- 已供物品:板，CD，電源 |
| AD9958/PCBZ | 制造商:Analog Devices 功能描述:EVAL BOARD, AD9958 DIRECT DIGITAL SYNTHE |
| AD9958_08 | 制造商:AD 制造商全稱:Analog Devices 功能描述:2-Channel, 500 MSPS DDS with 10-Bit DACs |
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