AD5933 1 MSPS、12位阻抗转换器网络分析仪

AD5933: 1 MSPS、12位阻抗转换器网络分析仪

AD5933 功能框图 AD5933是一款高精度的阻抗转换器系统解决方案，片上集成频率发生器与12位、1 MSPS的模数转换器(ADC)。用频率发生器产生的信号来激励外部复阻抗，外部阻抗的响应信号由片上ADC进行采样，然后由片上DSP进行离散傅里叶变换(DFT)处理。DFT算法在每个频率上返回一个实部(R)数据字和一个虚部(I)数据字。校准之后，很容易算出各扫描频率点的阻抗幅度和相对相位。计算是利用实部和虚部寄存器内容在片外完成，寄存器内容可以从串行I²C接口读取。ADI公司还提供一款类似器件AD5934，它是一款2.7 V至5.5 V、250 kSPS、12位阻抗转换器，内置温度传感器，并采用16引脚SSOP封装。

The AD5933 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 AD5933 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 AD5933 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 AD5933 is available in a 20-lead TSSOP package.

特点

提供中文数据手册
可编程输出峰峰值激励电压，输出频率最高达100 kHz
可编程频率扫描功能和串行I²C®接口
频率分辨率：27位(<0.1 Hz)
阻抗测量范围：1 kΩ至10 MΩ
利用附加电路可测量100 Ω至1 kΩ阻抗
内部温度传感器(±2°C)
内部系统时钟选项
欲了解更多信息，请参考数据手册
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

电化学分析
生物电阻抗分析
阻抗频谱分析
复阻抗测量
腐蚀监控和保护设备
生物医学和汽车传感器
生物电阻抗分析
近程传感
无损检测
材料性质分析
燃料/电池状态监控
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 : 16.776MHz
Resolution (Bits): 12bit
Tuning Word Width (bits): 27bit
I/O Interface: Serial
Compliance Range (V): n/a

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
AD5933YRSZ 产品状态: 量产	16 ld SSOP	16	工业	Tube, 77	$ 16.83	$ 6.73	Y 材料信息
AD5933YRSZ-REEL7 产品状态: 量产	16 ld SSOP	16	工业	Reel, 500	-	$ 6.73	Y 材料信息

开发工具

产品型号	描述	报价	RoHS
EVAL-AD5933EBZ 产品状态: 量产	Evaluation Board	$ 59.00	是