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參數(shù)資料
| 型號： | 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 |
| 文件頁數(shù)： | 39/42頁 |
| 文件大?。?/td> | 473K |
| 代理商： | AD9953 |
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PRELIMINARY TECHNICAL DATA
R/-Wb—Bit 7 of the instruction byte determines whether a read or write data transfer will occur
after the instruction byte write. Logic high indicates read operation. Logic zero indicates a write
operation.
X, X—Bits 6 and 5 of the instruction byte are don’t care.
A4, A3, A2, A1, A0—Bits 4, 3, 2, 1, 0 of the instruction byte determine which register is accessed
during the data transfer portion of the communications cycle.
Serial Interface Port Pin Description
SCLK
— Serial Clock. The serial clock pin is used to synchronize data to and from the AD9953
and to run the internal state machines. SCLK maximum frequency is 25 MHz.
CSB
— Chip Select Bar. Active low input that allows more than one device on the same serial
communications line. The SDO and SDIO pins will go to a high impedance state when this input is
high. If driven high during any communications cycle, that cycle is suspended until CS is
reactivated low. Chip Select can be tied low in systems that maintain control of SCLK.
SDIO
— Serial Data I/O. Data is always written into the AD9953 on this pin. However, this pin
can be used as a bi-directional data line. Bit 7 of register address 0h controls the configuration of
this pin. The default is logic zero, which configures the SDIO pin as bi-directional.
SDO
— Serial Data Out. Data is read from this pin for protocols that use separate lines for
transmitting and receiving data. In the case where the AD9953 operates in a single bi-directional
I/O mode, this pin does not output data and is set to a high impedance state.
SYNCIO
— Synchronizes the I/O port state machines without affecting the addressable registers
contents. An active high input on the SYNC I/O pin causes the current communication cycle to
abort. After SYNC I/O returns low (Logic 0) another communication cycle may begin, starting
with the instruction byte write.
AD9953
MSB/LSB Transqfers
The AD9953 serial port can support both most significant bit (MSB) first or least significant bit
(LSB) first data formats. This functionality is controlled by the Control Register 00h<8> bit. The
default value of Control Register 00h<8> is low (MSB first). When Control Register 00h<8> is set
high, the AD9953 serial port is in LSB first format. The instruction byte must be written in the
format indicated by Control Register 00h<8>. That is, if the AD9953 is in LSB first mode, the
instruction byte must be written from least significant bit to most significant bit.
For MSB first operation, the serial port controller will generate the most significant byte (of the
specified register) address first followed by the next lesser significant byte addresses until the IO
REV. PrB 1/30/03
Page 39
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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