Datasheet > 微控制器和处理器 > DSP 外围设备> AD9951YSV-REEL7

AD9951YSV-REEL7

更新时间： 2024-02-06 10:10:21

品牌	Logo	应用领域
亚德诺 - ADI		DSP外围设备微控制器和处理器外围集成电路时钟
页数	文件大小	规格书
28页	789K
描述
400 MSPS 14-Bit, 1.8 V CMOS Direct Digital Synthesizer

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技术参数
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替代型号

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AD9951YSV-REEL7 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	Active	零件包装代码：	QFP
包装说明：	HTFQFP,	针数：	48
Reach Compliance Code：	unknown	风险等级：	5.72
边界扫描：	NO	最大时钟频率：	400 MHz
JESD-30 代码：	S-PQFP-G48	JESD-609代码：	e0
长度：	7 mm	低功率模式：	YES
湿度敏感等级：	NOT SPECIFIED	端子数量：	48
最高工作温度：	105 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	HTFQFP
封装形状：	SQUARE	封装形式：	FLATPACK, HEAT SINK/SLUG, THIN PROFILE, FINE PITCH
峰值回流温度（摄氏度）：	220	认证状态：	COMMERCIAL
座面最大高度：	1.2 mm	最大供电电压：	1.89 V
最小供电电压：	1.71 V	标称供电电压：	1.8 V
表面贴装：	YES	技术：	CMOS
温度等级：	INDUSTRIAL	端子面层：	TIN LEAD
端子形式：	GULL WING	端子节距：	0.5 mm
端子位置：	QUAD	处于峰值回流温度下的最长时间：	30
宽度：	7 mm	uPs/uCs/外围集成电路类型：	DSP PERIPHERAL, NUMERIC CONTROLLED OSCILLATOR
Base Number Matches：	1

AD9951YSV-REEL7 数据手册

AD9951

INSTRUCTION BYTE

The instruction byte contains the following information:

Table 7.

MSB

LSB

R/Wb

serial port is in LSB first format. The instruction byte must be

written in the format indicated by Control Register 0x00 <8>. If

the AD9951 is in LSB first mode, the instruction byte must be

written from least significant bit to most significant bit.

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 0 indicates a write

operation.

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

I/O operation is complete. All data written to (read from) the

AD9951 must be (will be) in MSB first order. If the LSB mode is

active, the serial port controller will generate the least signifi-

cant byte address first followed by the next greater significant byte

addresses until the I/O operation is complete. All data written to

(read from) the AD9951 must be (will be) in LSB first order.

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 AD9951 and to run the internal state

machines. SCLK maximum frequency is 25 MHz.

Example Operation

CSB—Chip Select Bar. CSB is 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,

To write the amplitude scale factor register in MSB first format,

apply an instruction byte of 0x02 (serial address is 00010(b)).

From this instruction, the internal controller will generate an

internal byte address of 0x07 (see the register map) for the first

data byte written and an internal address of 0x08 for the next

byte written. Since the amplitude scale factor register is two

bytes wide, this ends the communication cycle.

that cycle is suspended until

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

AD9951 on this pin. However, this pin can be used as a

bidirectional data line. Bit 7 of Register Address 0x00 controls

the configuration of this pin. The default is Logic 0, which

configures the SDIO pin as bidirectional.

To write the amplitude scale factor register in LSB first format,

apply an instruction byte of 0x40. From this instruction, the

internal controller will generate an internal byte address of

0x08 (see the register map) for the first data byte written and an

internal address of 0x07for the next byte written. Since the

amplitude scale factor register is two bytes wide, this ends the

communication cycle.

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 AD9951 operates in a single bidirectional I/O

mode, this pin does not output data and is set to a high imped-

ance state.

Power-Down Functions of the AD9951

The AD9951 supports an externally controlled or hardware

power-down feature as well as the more common software pro-

grammable power-down bits found in previous ADI DDS products.

IOSYNC—It synchronizes the I/O port state machines without

affecting the addressable register’s contents. An active high in-

put on the IOSYNC pin causes the current communication

cycle to abort. After IOSYNC returns low (Logic 0), another

communication cycle may begin, starting with the instruction

byte write.

The software control power-down allows the DAC, PLL, input

clock circuitry, and digital logic to be individually powered

down via unique control bits (CFR1<7:4>). With the exception

of CFR1<6>, these bits are not active when the externally con-

trolled power-down pin (PWRDWNCTL) is high. External

power-down control is supported on the AD9951 via the

PWRDWNCTL input pin. When the PWRDWNCTL input pin

is high, the AD9951 will enter a power-down mode based on

the CFR1<3> bit. When the PWRDWNCTL input pin is low,

the external power-down control is inactive.

MSB/LSB TRANSFERS

The AD9951 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 0x00 <8> bit.

The default value of Control Register 0x00 <8> is low (MSB

first). When Control Register 0x00 <8> is set high, the AD9951

Rev. 0 | Page 22 of 28

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中文翻译

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AD9951YSV-REEL7 替代型号

型号	品牌	替代类型	描述	数据表
AD9951YSVZ-REEL7	ADI	完全替代	400 MSPS 14-Bit, 1.8 V CMOS Direct Digital Synthesizer
AD9951YSVZ	ADI	完全替代	400 MSPS 14-Bit, 1.8 V CMOS Direct Digital Synthesizer
AD9951YSV	ADI	完全替代	400 MSPS 14-Bit, 1.8 V CMOS Direct Digital Synthesizer

与AD9951YSV-REEL7相关器件

型号	品牌	获取价格	描述	数据表
AD9951YSVZ	ADI	获取价格	400 MSPS 14-Bit, 1.8 V CMOS Direct Digital Synthesizer
AD9951YSVZ-REEL7	ADI	获取价格	400 MSPS 14-Bit, 1.8 V CMOS Direct Digital Synthesizer
AD9952	ADI	获取价格	400 MSPS 14-Bit, 1.8 V CMOS Direct Digital Synthesizer
AD9952YSV	ADI	获取价格	400 MSPS 14-Bit, 1.8 V CMOS Direct Digital Synthesizer
AD9952YSV-REEL7	ADI	获取价格	400 MSPS 14-Bit, 1.8 V CMOS Direct Digital Synthesizer
AD9952YSVZ	ADI	获取价格	400 MSPS 14-Bit, 1.8 V CMOS Direct Digital Synthesizer
AD9952YSVZ-REEL7	ADI	获取价格	400 MSPS 14-Bit, 1.8 V CMOS Direct Digital Synthesizer
AD9953	ADI	获取价格	400 MSPS 14-Bit, 1.8V CMOS Direct Digital Synthesizer
AD9953ASV	ADI	获取价格	400 MSPS 14-Bit, 1.8V CMOS Direct Digital Synthesizer
AD9953PCB	ADI	获取价格	400 MSPS 14-Bit, 1.8V CMOS Direct Digital Synthesizer

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