AD5930 可编程扫频和输出触发脉冲波形发生器

AD5930: 可编程扫频和输出触发脉冲波形发生器

AD5930 功能框图 AD5930是一款内置可编程扫频和输出触发脉冲功能的波形发生器。它利用嵌入式数字处理增强频率控制，产生合成的模拟或数字频率步进波形。由于频率方案经过预编程，无需连续写入周期，因此宝贵的DSP/微控制器资源得以释放。波形从一个已知相位开始，然后相位连续递增，因而很容易确定相移。AD5930有三种工作模式。在连续输出模式下，该器件在规定的时长内输出所需频率，然后步进至下一频率。器件输出特定频率的时长既可以经预编程设定自动递增频率，也可以通过CTRL引脚从外部递增。在触发脉冲模式下，该器件在一定的时长内输出频率，然后返回中量程并停留预定时长，最后才步进至下一频率。在MSB模式下，该器件产生数字输出。

对该器件进行编程时，用户输入起始频率、递增步进大小、递增次数以及该器件在各频率停留的时长。频率方案可通过触发CTRL引脚启动。该器件提供多种不同的扫描方案。频率可以采用三角形扫描模式步进，在频率范围内连续上下扫描，或者采用锯齿形扫描模式步进，向上扫描完成后返回初始频率，然后再次启动扫描。此外，还可以无需任何扫描产生单一频率或突发脉冲。AD5930通过一个三线式串行接口写入数据，能够以最高40 MHz的时钟速率工作。它采用2.3 V至5.5 V电源供电，并且具有待机功能，可以让器件中未使用的部分进入省电状态。AD5930采用20引脚TSSOP封装。

The AD5930 is a waveform generator with programmable frequency sweep and output burst capability. Utilizing embedded digital processing allowing enhanced frequency control the device generates synthesized analog or digital frequency-stepped waveforms. Because frequency profiles are preprogrammed continuous write cycles are eliminated, thereby freeing up valuable DSP/µController resources. Waveforms start from a known phase and are incremented phase continuously allowing phase shifts to be easily determined.

The AD5930 can be operated in three modes. In continuous output mode the device outputs the required frequency for a defined length of time and then steps to the next frequency. The length of time the device outputs a particular frequency can be either preprogrammed and the device increments the frequency automatically or alternatively can be incremented externally via the CTRL pin. In Burst mode, the device outputs it’s frequency for a length of time and then returns to midscale for a further predefined length of time before stepping to the next frequency. In MSB mode a digital output is generated.To program the device, the user enters the start frequency, the increment step size, the number of increments to be made and the time interval the part stays at each frequency. The frequency profile can be initiated by toggling the CTRL pin.

A number of different sweep profiles are offered. Frequencies can be stepped in triangular-sweep mode continuously sweeping up and down through the frequency range or in saw-sweep mode sweeping up but returning to the initial frequency before initiating the sweep again. In addition a single frequency or burst can generate without any sweep.The AD5930 is written to via a 3-wire serial interface, which operates at clock rates up to 40 MHz. The device operates with a power supply from 2.3 V to 5.5 V and has a standby function which allows sections of the device that are not being used to be powered down.The AD5930 is available in a 20-lead TSSOP package.

特点

可编程频率方案，无需外部元件
输出频率最高达25 MHz
可预编程频率方案使DSP/微控制器写入周期数降至最少，正弦波/三角波/方波输出
自动控制或单引脚控制频率步进
突发脉冲与侦听功能
波形从已知相位开始，相位在0°开始递增或连续递增
省电模式：20 µA
电源电压：2.3 V至5.5 V
汽车应用温度范围：−40°C至+125°C
20引脚无铅TSSOP封装
Programmable frequency profile No external components necessary
Output frequency up to 25 MHz
Pre-programmable frequency profile minimizes number of DSP/µcontroller writes Sinusoidal/triangular/square wave outputs
Automatic or single pin control of frequency stepping
Burst and listen capability
Waveform starts at known phase Increments at 0° phase or phase continuously
Power-down mode: 20 µA
Power supply: 2.3 V to 5.5 V
Automotive temperature range:−40°C to +125°C
20-lead pb-free TSSOP

应用领域

扫频/雷达
网络/阻抗测量
递增频率剌激
传感应用—近程和运动BFSK
频率突发脉冲/脉冲序列
Frequency Sweeping/Radar
Network/Impedance Measurements
Incremental Frequency stimulus
Sensory Applications-Proximity and Motion BFSK
Frequency Bursting/Pulse Trains

技术指标

Master fclk : 50MHz
Resolution (Bits): 10bit
Tuning Word Width (bits): 24bit
I/O Interface: Serial
REFCLK Multiplier: No
Compliance Range (V): 0.8V
FS Iout (mA nom): 3.1mA

订购指南

产品型号	封装	引脚	温度范围	包装和数量	报价*(100-499)	报价*1000 pcs	RoHS
AD5930YRUZ 产品状态: 量产	20 ld TSSOP	20	工业	Tube, 75	$ 7.78	$ 6.38	Y 材料信息
AD5930YRUZ-REEL7 产品状态: 量产	20 ld TSSOP	20	工业	Reel, 1000	-	$ 6.38	Y 材料信息

开发工具

产品型号	描述	报价	RoHS
EVAL-AD5930EBZ 产品状态: 量产	Evaluation Board	$ 99.00	是