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AD5252:  I2C, 非易失性存储器、双通道、256位数字电位计

产品详情

AD5252是一款双通道、数字控制可变电阻(VR),具有256位分辨率。它可实现与电位计或可变电阻相同的电子调整功能。该器件通过微控制器实现多功能编程,可以提供多种工作与调整模式。

在直接编程模式下,可以从微控制器直接加载RDAC寄存器的预设置。在另一种主要工作模式下,可以用以前存储在EEMEM寄存器中的设置更新RDAC寄存器。当更改RDAC寄存器以确立新的游标位时,可以通过执行EEMEM保存操作,将该设置值保存在EEMEM中。一旦将设置保存在EEMEM寄存器之后,这些值就可以自动传输至RDAC寄存器,以便在系统上电时设置游标位。这种操作由内部预设选通脉冲使能;也可以从外部访问预设值。

基本调整模式就是在游标位设置(RDAC)寄存器的现有设置基础上递增和递减。可以上移或下移内部便笺式RDAC寄存器,每次移动A端与B端之间的标称电阻的一步。这将使游标至B端电阻(RWB)发生线性改变,幅度为AD5251/AD5252端到端电阻(RAB)的64/256位中的一位。若要使游标设置发生非线性改变,可以使用左移/右移命令以6dB步进调整电平,这种方式适合声响和灯光报警应用。

AD5251/AD5252采用薄型TSSOP-14封装,保证工作温度范围为-40°C至+125°C扩展工业温度范围。

特点和优势

  • 非易失性存储器可保存游标设置
  • 电阻容差存储在非易失性存储器中
  • 1 k Ω, 10 k Ω, 50 k Ω 100 k Ω
  • I2C 兼容型串行接口
  • 游标设置回读功能
  • 线性递增/递减预定义指令
  • ±6 dB对数阶梯式递增/递减预定义指令
  • 单电源:2.7 V至5.5 V
  • 逻辑操作电压:3 V至5 V
  • 上电复位至EEMEM设置,刷新时间小于1 ms
  • 非易失性存储器写保护
  • 数据保留期限:100年(典型值, TA = 55°C )

AD5252功能框图

类似产品

  • AD5232: 非易失性存储器、双通道256位数字电位计
  • AD5235: 非易失性存储器、双通道1024位数字电位计
  • AD5251: I2C非易失性存储器、双通道64位数字电位计

More

其他评估板信息

如果购买此产品的评估板模型,则还需要系统演示平台(SDP)。二者一起使用,构成客户评估环境的一部分。

文档

快讯名称 内容类型 文件类型
AD5251/AD5252: Dual 64-/256-Position I2C Nonvolatile Memory Digital Potentiometers Data Sheet (Rev D, 10/2012) (pdf, 607 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-686: 实现I2C®复位  (pdf, 263 kB) 应用笔记 PDF
AN-686: Implementing an I2C® Reset  (pdf, 44 kB) 应用笔记 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
UG-274: Evaluation Board for the AD5252 Digital Potentiometer  (pdf, 577 kB) 用户指导 PDF
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
Programmable 5-30V Power Supply 常见问题解答 HTML
Programmable LDO with Precision 常见问题解答 HTML
Manual Push Button LED Driver 常见问题解答 HTML
Adjustable Voltage Source for Driving LED 常见问题解答 HTML
Adjustable Current Source for Driving Single LED 常见问题解答 HTML
Adjustable Current Source for Driving Multiple LEDs 常见问题解答 HTML
Programmable Bidirectional Current Source 常见问题解答 HTML
High Power RGB LEDs Driver 常见问题解答 HTML
Automatic LED Brightness Control 常见问题解答 HTML
High Voltage DAC 常见问题解答 HTML
Bipolar DAC with EEPROM 常见问题解答 HTML
Voltage-to-Current Conversion 常见问题解答 HTML
Programmable Low Pass Filter 常见问题解答 HTML
Programmable State-Variable Filter 常见问题解答 HTML
Programmable Oscillator 常见问题解答 HTML
Audio Volume Control 常见问题解答 HTML
Audio Amplifier Volume Control 常见问题解答 HTML
LCD Panel VCOM Adjustment 常见问题解答 HTML
Laser Bias and Modulation Current Biasing 常见问题解答 HTML
Manual Rotary Control 常见问题解答 HTML
Bipolar Programmable Gain Amplifier 常见问题解答 HTML
Programmable Current-Sensing Amplifier 常见问题解答 HTML
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
AD5252 FMC-SDP Interposer & Evaluation Board / Xilinx KC705 Reference Design FPGA HDL HTML
BeMicro FPGA Project for AD5252 with Nios driver FPGA HDL HTML
AD5252 - Microcontroller No-OS Driver 设备驱动 HTML
Digital Potentiometer Linux Driver 设备驱动 HTML

评估套件,原理图符号和PCB封装

评估板和开发套件查看评估板和套件页面以了解文档和采购信息

原理图符号和PCB封装— ADI公司提供与当今众多CAD系统兼容的原理图符号和PCB封装(Symbols & Footprints),以便更广泛、更轻松地使用。

Sample样片申请及购买

价格,封装及供货状态

AD5252 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
AD5252BRU1 产品状态: 量产 14 ld TSSOP 14 工业 Tube, 96 $ 2.06 $ 1.86 N  材料信息 查看PCN 订购
AD5252BRU1-RL7 产品状态: 最后订购时间 14 ld TSSOP 14 工业 Reel, 1000 $ 2.06 $ 1.86 N  材料信息 查看PCN/PDN 订购
AD5252BRU10 产品状态: 量产 14 ld TSSOP 14 工业 Tube, 96 $ 2.06 $ 1.86 N  材料信息 查看PCN 订购
AD5252BRU10-RL7 产品状态: 量产 14 ld TSSOP 14 工业 Reel, 1000 $ 2.06 $ 1.86 N  材料信息 查看PCN 订购
AD5252BRU100 产品状态: 最后订购时间 14 ld TSSOP 14 工业 Tube, 96 $ 2.06 $ 1.86 N  材料信息 查看PCN/PDN 订购
AD5252BRU100-RL7 产品状态: 最后订购时间 14 ld TSSOP 14 工业 Reel, 1000 $ 2.06 $ 1.86 N  材料信息 查看PCN/PDN 订购
AD5252BRU50 产品状态: 最后订购时间 14 ld TSSOP 14 工业 Tube, 96 $ 2.06 $ 1.86 N  材料信息 查看PCN/PDN 订购
AD5252BRU50-RL7 产品状态: 最后订购时间 14 ld TSSOP 14 工业 Reel, 1000 $ 2.06 $ 1.86 N  材料信息 查看PCN/PDN 订购
AD5252BRUZ1 产品状态: 量产 14 ld TSSOP 14 工业 Tube, 96 $ 1.78 $ 1.61 Y  材料信息 查看PCN 订购 样片
AD5252BRUZ1-RL7 产品状态: 量产 14 ld TSSOP 14 工业 Reel, 1000 $ 1.78 $ 1.61 Y  材料信息 查看PCN 订购
AD5252BRUZ10 产品状态: 量产 14 ld TSSOP 14 工业 Tube, 96 $ 1.78 $ 1.61 Y  材料信息 查看PCN 订购 样片
AD5252BRUZ10-RL7 产品状态: 量产 14 ld TSSOP 14 工业 Reel, 1000 $ 1.78 $ 1.61 Y  材料信息 查看PCN 订购
AD5252BRUZ100 产品状态: 量产 14 ld TSSOP 14 工业 Tube, 96 $ 1.78 $ 1.61 Y  材料信息 查看PCN 订购 样片
AD5252BRUZ100-RL7 产品状态: 量产 14 ld TSSOP 14 工业 Reel, 1000 $ 1.78 $ 1.61 Y  材料信息 查看PCN 订购
AD5252BRUZ50 产品状态: 量产 14 ld TSSOP 14 工业 Tube, 96 $ 1.78 $ 1.61 Y  材料信息 查看PCN 订购 样片
AD5252BRUZ50-RL7 产品状态: 量产 14 ld TSSOP 14 工业 Reel, 1000 $ 1.78 $ 1.61 Y  材料信息 查看PCN 订购
帮助

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。

AD5252 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-AD5252SDZ 产品状态: 量产 Evaluation Board $ 59.00 -
EVAL-SDP-CB1Z 产品状态: 量产 Evaluation Controller Board $ 99.00 -

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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