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AD5291:  单通道、1%端到端电阻容差(R-Tol)、256位数字电位计,具有20次可编程存储器

产品详情

AD5291/AD5292属于ADI公司的digiPOT+™ 电位计系列,分别是单通道256/1024位数字电位计1 ,集业界领先的可变电阻性能与非易失性存储器(NVM)于一体,采用紧凑型封装。这些器件的工作电压范围很宽,既可以采用±10.5 V至±16.5 V双电源供电,也可以采用+21 V至+33 V单电源供电,同时端到端电阻容差误差小于1%,并提供20次可编程(20-TP)存储器。

业界领先的保证低电阻容差误差特性可以简化开环应用,以及精密校准与容差匹配应用。

AD5291/AD5292的游标设置可通过SPI数字接口控制。将电阻值编程写入20-TP存储器之前,可进行无限次调整。这些器件不需要任何外部电压源来帮助熔断熔丝,并提供20次永久编程的机会。在20-TP激活期间,一个永久熔断熔丝指令会将游标位置固定(类似于将环氧树脂涂在机械式调整器上)。

AD5291/AD5292采用紧凑型14引脚TSSOP封装,保证工作温度范围为−40°C至+105°C扩展工业温度范围。

1数字电位计和RDAC这些术语可以互换使用。

应用

  • 机械电位计的替代产品
  • 仪器仪表:增益和失调电压调整
  • 可编程电压至电流转换
  • 可编程滤波器、延迟、时间常数
  • 可编程电源
  • 低分辨率DAC的替代器件
  • 传感器校准

特点和优势

  • 单通道、256/1024位分辨率
  • 标称电阻:20 kΩ, 50 kΩ和 100 kΩ
  • 校准的标称电阻容差:±1%(电阻性能模式)
  • 20次可编程
  • 温度系数(变阻器模式):35 ppm/°C
  • 温度系数(分压器模式):5 ppm/°C
  • +9 V 至 +33 V 单电源供电
  • ±9 V至±16.5 V 双电源供电
  • 欲了解更多特性,请参考数据手册

AD5291 功能框图

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文档

快讯名称 内容类型 文件类型
AD5291/AD5292: 256-/1024-Position, Digital Potentiometers with Maximum ±1% R-Tolerance Error and 20-TP Memory Data Sheet (Rev D, 09/2010) (pdf, 387 kB) 产品数据手册 PDF
AN-1291: 数字电位计:常见问题解答  (pdf, 687 kB) 应用笔记 PDF
AN-1291: Digital Potentiometers: Frequently Asked Questions  (pdf, 805 kB) 应用笔记 PDF
AN-1206: Variable Gain Inverting Amplifier Using the AD5292 Digital Potentiometer and the OP184 Op Amp  (pdf, 177 kB) 应用笔记 PDF
AN-1205: 30 V Low Cost DAC Using the AD5292 Digital Potentiometer  (pdf, 225 kB) 应用笔记 PDF
CN-0114  (pdf, 155 kB)
利用数字电位计AD5292和仪表放大器AD8221构建低成本、高电压、可编程增益仪表放大器
Circuit Note PDF
CN-0112  (pdf, 291 kB)
利用数字电位计AD5292和运算放大器OP184构建可变增益同相放大器
Circuit Note PDF
为您的应用选择合适的数字电位计  (pdf, 1313 kB) 设计手册 PDF
Webinar: Digital Potentiometers - Where and How to Use
Digital Potentiometers (digiPOTs) provide a convenient way to adjust the ac or dc voltage or current output of sensors, power supplies, or other devices that require some type of calibration. This webcast will describe the function, use and advantages of using digital potentiometers in various applications. The webinar will also highlight the main parameters to be considered when designing a circuit using a digital potentiometer.
在线研讨会 WEBCAST
Understanding and Applying Digital Potentiometers
In this webcast our experts will explain the differences between Pots and DigiPots and DACs, and present considerations for successful designs for many applications.
在线研讨会 WEBCAST
为您的应用选择合适的数字电位计  (pdf, 1313 kB) 概况 PDF
Is there a power up sequence I should follow? 常见问题解答 HTML
For dual supply digital potentiometers, if VDD/VSS are +2.5V/-2.5V respectively, can digital inputs be fed from a standard 3.3V CMOS logic component without logic level translation? What are the logic level thresholds when VDD is +2.5V and VSS is -2.5V? 常见问题解答 HTML
Is there a dependency between the logic level and power consumption? 常见问题解答 HTML
Is digital potentiometer a real replacement for mechanical potentiometer or are there restrictions regarding voltage potentials? 常见问题解答 HTML
Are all digital potentiometers limited to |5V|? 常见问题解答 HTML
Do digital potentiometers handle bipolar and AC operations? 常见问题解答 HTML
Can I achieve a 15V signal swing when using a 5V digital potentiometer? 常见问题解答 HTML
For digital potentiometers that do not have nonvolatile memory, what is the state during power up? 常见问题解答 HTML
Is there a particularly low-power digital potentiometer? 常见问题解答 HTML
Does the memory allow the device to return to the last stored value without an update from a micro? 常见问题解答 HTML
Will the data in the EEMEM need to be refreshed after 15 yrs when it is operated at 55°C? 常见问题解答 HTML
How many write cycles can the EEMEM go through before it fails? 常见问题解答 HTML
After the specified EEMEM data retention timeout period, can the power be turned off and back on so that the part is considered "refreshed"? 常见问题解答 HTML
Why are some digital potentiometers' maximum operating temperature only 85°C instead of the standard 125°C? 常见问题解答 HTML
How good is the resistance matching between Ch1 and Ch2 in the dual digital potentiometer? 常见问题解答 HTML
How is the resistance matching device to device? 常见问题解答 HTML
What is the resistance tolerance of the digital potentiometers? 常见问题解答 HTML
Can I cascade, serialize, or parallel multiple digital potentiometers to get the resistance or resolution I need? My requirement is for a 250 Ω digital potentiometer with approximately 1 Ω/step. I plan to use four 1 kΩ AD8403 in parallel with each set to nominally the same value. 常见问题解答 HTML
I would like to know how the digital potentiometer is built. How ideal are the wiper switches? 常见问题解答 HTML
What is the tempco of the digital potentiometer? 常见问题解答 HTML
What is the maximum current I can force into the digital potentiometer? 常见问题解答 HTML
Can a digitally controlled variable resistor withstand greater than 20mA? 常见问题解答 HTML
Can a digipot be used to construct a programmable high current source? 常见问题解答 HTML
If I use the digital potentiometer in a "dry" circuit (current through wiper < 1 pA), will it behave as a linear resistor in rheostat mode? 常见问题解答 HTML
Are ADI's digital potentiometers suitable for use in photodetector amplifiers and will they suffer from leakage currents which could affect the gain of the circuit? 常见问题解答 HTML
Regarding the spec on R-DNL, I am only concerned with relative adjustments. I'm not concerned with the actual value of the resistor in the digipot but need the digipot to be monotonic. 常见问题解答 HTML
Can I adjust the digital potentiometer for frequencies around 1MHz to 10MHz for adjusting the gain of a video signal? 常见问题解答 HTML
What is the maximum frequency that can be applied to the digital potentiometer CLK input? 常见问题解答 HTML
Is there crosstalk between Ch1 and Ch2 of a dual digital potentiometer such that a sine wave applied to Ch1 will occur in Ch2 as well? 常见问题解答 HTML
If I program Ch 1 from zero to full scale, will I expect Ch 2 to be disturbed? 常见问题解答 HTML
Digital Feedthrough 常见问题解答 HTML
How is the THD performance of digital potentiometer? 常见问题解答 HTML
If I use the digital potentiometer in audio volume control, will I experience zipper noise? 常见问题解答 HTML
For a digital potentiometer that requires 6-bit word length, what happens if I have 8-bit word length from my PC? 常见问题解答 HTML
For a digital potentiometer that requires 12-bit word length, how can I control with only 8-bit word length from my micro? 常见问题解答 HTML
Do you provide any software to control the digital potentiometers? 常见问题解答 HTML
How do I daisy-chain multiple potentiometers? How does the serial interface work for multiple AD8403's when there are still only two address bits? Are there multiple /CS lines, one for each individual chip? 常见问题解答 HTML
Can I program two channels of a multi-channel digital potentiometer at the same time? 常见问题解答 HTML
Can I read back the wiper setting of the digital potentiometers? 常见问题解答 HTML
Can I read back the contents of the two RDAC registers of AD5242 or AD5282 (dual I2C compatible digital potentiometer)? 常见问题解答 HTML
Is there a digital potentiometer controlled by a parallel input? 常见问题解答 HTML
Can digital potentiometers do log taper adjustment? 常见问题解答 HTML
I'm unsure about how to use pin 13 write protect (/WP), pin 14 preset (/PR), and pin 16 ready (RDY)? 常见问题解答 HTML
Why Should I replace mechanical potentiometers with digiPOT? 常见问题解答 HTML
What should I watch out for when I replace mechanical potentiometers with digital potentiometers? 常见问题解答 HTML
What is the ESD rating of digital potentiometers? 常见问题解答 HTML
How do I tell the end-to-end RAB resistance value? 常见问题解答 HTML
What are the common failure modes of digital potentiometers? 常见问题解答 HTML
Are there any evaluation boards for the digital potentiometers? 常见问题解答 HTML
Are PB-free digital potentiometers available? 常见问题解答 HTML
Can I use the new PB-free DigiPOTs in my traditional solder based PCB assembly process? 常见问题解答 HTML
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6-Bit Controller 常见问题解答 HTML
Level Shifting Digital Inputs from 3.3V to 5V or Vice Versa 常见问题解答 HTML
Level Shifting Digital Signals from 0V to +5V to -5V to 0V 常见问题解答 HTML
Multiple I2C Slave Devices Addressing 常见问题解答 HTML
Resolution Enhancement 常见问题解答 HTML
Pseudo Memory Retention 常见问题解答 HTML
RAQs index 非常见问题解答 HTML
术语表 专业词汇表 HTML

设计工具,模型,驱动及软件

快讯名称 内容类型 文件类型
AD529x IBIS Model  (ibs) IBIS 模型 IBS
Digital Potentiometer Linux Driver 设备驱动 HTML

评估套件,原理图符号和PCB封装

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Sample样片申请及购买

价格,封装及供货状态

AD5291 型号选项
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 查看PCN/PDN 查看库存/
购买/样片
AD5291BRUZ-100 产品状态: 量产 14 ld TSSOP 14 工业 Tube, 96 $ 2.79 $ 2.29 Y  材料信息 查看PCN 订购 样片
AD5291BRUZ-100-RL7 产品状态: 量产 14 ld TSSOP 14 工业 Reel, 1000 - $ 2.29 Y  材料信息 查看PCN 订购
AD5291BRUZ-20 产品状态: 量产 14 ld TSSOP 14 工业 Tube, 96 $ 2.79 $ 2.29 Y  材料信息 查看PCN 订购 样片
AD5291BRUZ-20-RL7 产品状态: 量产 14 ld TSSOP 14 工业 Reel, 1000 - $ 2.29 Y  材料信息 查看PCN 订购
AD5291BRUZ-50 产品状态: 量产 14 ld TSSOP 14 工业 Tube, 96 $ 2.79 $ 2.29 Y  材料信息 查看PCN 订购 样片
AD5291BRUZ-50-RL7 产品状态: 量产 14 ld TSSOP 14 工业 Reel, 1000 - $ 2.29 Y  材料信息 查看PCN 订购
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这里所列出的美国报价单仅供预算参考,指美元报价(规定订量的每片美元,美国离岸价),如有修改不再另行通知。由于地区关税、商业税、汇率及手续费原因,国际报价可能不同。对于特殊批量报价,请与您当地的ADI公司办事处或代理商联络。对于评估板和套件的报价是指一个单位价格。

AD5292 评估板
产品型号 描述 报价 RoHS 查看PCN/PDN 查看库存/
购买/样片
EVAL-AD5292EBZ 产品状态: 量产 Evaluation Board $ 59.00 -

所示报价为单片价格。所列的美国报价单仅供预算参考,指美元报价(每片美国离岸价),如有修改,恕不另行通知。由于地区关税、商业税、汇率及手续费原因,国际报价可能不同。

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