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参数资料
| 型号： | AD9957BSVZ-REEL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 26/64页 |
| 文件大小： | 0K |
| 描述： | IC DDS 1GSPS 14BIT IQ 100TQFP |
| 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 |
| 标准包装： | 1,000 |
| 分辨率（位）： | 14 b |
| 主 fclk： | 1GHz |
| 调节字宽（位）： | 32 b |
| 电源电压： | 1.8V, 3.3V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 100-TQFP 裸露焊盘 |
| 供应商设备封装： | 100-TQFP-EP（14x14） |
| 包装： | 带卷 (TR) |
| 配用： | AD9957/PCBZ-ND - BOARD EVAL AD9957 QUADRATURE MOD |
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AD9957
Data Sheet
Rev. C | Page 32 of 64
START ADDRESS
RAM
ADDRESS
END ADDRESS
1
1 PDCLK CYCLE
OR
M DDS CLOCK CYCLES
Δt
I/O_UPDATE OR
RT TRANSITION
2
3
1
Δt
06384-
025
Figure 45. Continuous Bidirectional Ramp Timing Diagram
RAM Continuous Bidirectional Ramp Mode
In continuous bidirectional ramp mode, upon assertion of an
I/O update or a state change on the RT pin, the RAM begins
playback operation using the parameters programmed into the
selected RAM segment register. Data is extracted from RAM
over the specified address range contained in the start address
and end address. The data is delivered at the appropriate rate
and to the destination as specified by the RAM playback
destination bit.
The playback rate is governed by the timer internal to the RAM
state machine and its period (Δt) is determined by the state of
the RAM playback destination bit as detailed in the RAM
Playback Operation section.
After initialization, the internal state machine begins extracting
data from the RAM at the start address of the active RAM segment
register and increments the address counter until it reaches the
end address, at which point the state machine reverses the direc-
tion of the address counter and begins decrementing through
the address range. Whenever one of the terminal addresses is
reached, the state machine reverses the address counter; the
process continues indefinitely.
Note that a change in state of the RT pin aborts the current
waveform and the newly selected RAM segment register is used
to initiate a new waveform.
A graphic representation of the continuous bidirectional ramp
mode is shown in Figure 45. The circled numbers in Figure 45
indicate specific events, explained as follows:
Event 1—an I/O update or state change on the RT pin has
activated the RAM continuous bidirectional ramp mode. The
state machine initializes to the start address of the active RAM
segment register. The state machine begins incrementing
through the specified address range.
Event 2—the state machine reaches the end address of the active
RAM segment register.
Event 3—the state machine reaches the start address of the
active RAM segment register.
The continuous bidirectional ramp continues indefinitely until
the next I/O update or state change on the RT pin.
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相关代理商/技术参数 |
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| AD9957BSVZREEL13 | 制造商:AD 制造商全称:Analog Devices 功能描述:1 GSPS Quadrature Digital Upconverter w/18-Bit IQ Data Path and 14-Bit DAC |
| AD9958 | 制造商:AD 制造商全称:Analog Devices 功能描述:2-Channel 500 MSPS DDS with 10-Bit DACs |
| 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 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:PSoC® 主要目的:电源管理，热管理 嵌入式:- 已用 IC / 零件:- 主要属性:- 次要属性:- 已供物品:板，CD，电源 |
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