參數(shù)資料
型號(hào)： AD9953
廠商： Analog Devices, Inc.
元件分類： XO, clock
英文描述： 400 MSPS 14-Bit, 1.8V CMOS Direct Digital Synthesizer
中文描述： 400 MSPS的14位，1.8V CMOS的直接數(shù)字頻率合成器
文件頁(yè)數(shù)： 22/42頁(yè)
文件大?。?/td> 473K
代理商： AD9953
PRELIMINARY TECHNICAL DATA
CFR2<9>:
Crystal Out Enable bit.
When CFR2<9> = 0
(default)
the Crystal Out pin is inactive.
When CFR2<9> = 1, the Crystal Out pin is active. When active, the crystal oscillator
circuitry output drives the Crystal Out pin, which can be connected to other devices
to produce a reference frequency.
CFR2<8>:
DAC prime data disable bit.
When CFR2<8> = 0 (
default
), the DAC prime data is enabled for operation.
When CFR2<8> = 1, the DAC prime data is not generated and these outputs remain
logic zeros.
CFR2<7:3>:
Reference clock multiplier control bits. See the
Phase Locked Loop (PLL)
section of this document for details.
CFR2<2>:
VCO gain control bit. This bit is used to control the gain setting on the VCO.
CFR<1:0>:
Charge Pump gain control bits. These bits are used to control the gain setting
on the charge pump.
Other Register Descriptions
Amplitude Scale Factor (ASF)
The ASF Register stores the 2-bit Auto Ramp Rate Speed value ASF<15:14> and the 14-bit
Amplitude Scale Factor ASF<13:0> used in the Output Shaped Keying (OSK) operation. In auto
OSK operation, that is CFR1<24> = 1, ASF <15:14> tells the OSK block how many amplitude
steps to take for each increment or decrement. ASF<13:0> sets the maximum value achievable by
the OSK internal multiplier. In manual OSK mode, that is CFR1<24>=0, ASF<15:14> have no
affect. ASF <13:0> provide the output scale factor directly. If the OSK enable bit is cleared,
CFR1<25>=0, this register has no affect on device operation.
Amplitude Ramp Rate (ARR)
The ARR register stores the 8-bit Amplitude Ramp Rate used in the Auto OSK mode, that is
CFR1<25>=1, CFR<24>=1. This register programs the rate the amplitude scale factor counter
increments or decrements. In the OSK is set to manual mode, CFR1<25>=1 CFR<24>=0, or if
OSK enable is cleared CFR1<25>=0, this register has no affect on device operation.
AD9953
REV. PrB 1/30/03
Page 22
Analog Devices, Inc.
相關(guān)PDF資料
PDF描述
AD9953ASV 400 MSPS 14-Bit, 1.8V CMOS Direct Digital Synthesizer
AD9953PCB 400 MSPS 14-Bit, 1.8V CMOS Direct Digital Synthesizer
AD9954 400 MSPS 14-Bit, 1.8 V CMOS Direct Digital Synthesizer
AD9954YSV 400 MSPS 14-Bit, 1.8 V CMOS Direct Digital Synthesizer
AD9954YSV-REEL7 400 MSPS 14-Bit, 1.8 V CMOS Direct Digital Synthesizer
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD9953/PCB 制造商:Analog Devices 功能描述:400 MSPS, 14BIT DGTL SYNTHESIZER - Bulk
AD9953ASV 制造商:AD 制造商全稱:Analog Devices 功能描述:400 MSPS 14-Bit, 1.8V CMOS Direct Digital Synthesizer
AD9953PCB 制造商:AD 制造商全稱:Analog Devices 功能描述:400 MSPS 14-Bit, 1.8V CMOS Direct Digital Synthesizer
AD9953YSV 制造商:Analog Devices 功能描述:Direct Digital Synthesizer 400MHz 1-DAC 14-Bit Serial 48-Pin TQFP EP 制造商:Rochester Electronics LLC 功能描述:AD9953 400 MSPS DDS W/ 14 BIT DAC - Bulk 制造商:Analog Devices 功能描述:IC DDS 400MSPS SMD 9953 TQFP48
AD9953YSV-REEL7 制造商:Analog Devices 功能描述:Direct Digital Synthesizer 400MHz 1-DAC 14-Bit Serial 48-Pin TQFP EP T/R
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