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AD5282:  单/双通道、+15 V/±5 V、256位、I2C兼容型数字电位计

产品详情

AD5280/AD5282分别是单/双通道、256位、数字控制可变电阻 (VRs)2,可实现与电位计、调整器或可变电阻相同的电子调整功能。在A端与游标或B端与游标之间,各VR提供一个完全可编程电阻值。A至B固定端接电阻(20 kΩ、50 kΩ或200 kΩ)的通道间匹配容差为1%。两款器件的标称温度系数均为30 ppm/°C。另外,这些器件可采用最高+15 V或±5 V电源供电。

在系统上电时,游标位默认设置为中量程。上电后,VR游标位可通过一个I2C兼容型双线式串行数据接口进行编程设置。AD5280/AD5282提供休眠模式编程功能,可以在上电时进行任何预设,从而能够取代高成本的EEPROM解决方案。两款器件均提供附加可编程逻辑输出,因此用户能够驱动其系统中的数字负载、逻辑门、LED驱动器和模拟开关。

AD5280/AD5282提供薄型表贴、14引脚TSSOP和16引脚TSSOP两种封装。所有器件的保证工作温度范围均为−40°C至+85°C工业温度范围。对于三线式SPI兼容接口应用,请参考ADI公司网站www.analog.com.上的AD5260/AD5262 产品信息。

应用

  • 多媒体、视频、音频
  • 通信
  • 机械电位计的替代产品
  • 仪器仪表:增益、失调电压调整
  • 可编程电压源
  • 可编程电流源
  • 线路阻抗匹配
  • 1置位关断并在上电期间对器件进行编程,然后复位关断以实现所需的预设电平。
    2 数字电位计、VR和RDAC这些术语可以互换使用。

    数据手册, Rev. C, 7/09

    特点和优势

    • AD5280:单通道
    • AD5282: 双通道
    • 256位
    • +10 V至+15 V单电源或±5.5 V双电源供电
    • 固定端接电阻:20 kΩ、50 kΩ、200 kΩ
    • 低温度系数:30 ppm/°C
    • 上电中量程预设1
    • 可编程复位
    • 工作温度范围: −40°C至 +85°C
    • I2C兼容接口

    AD5282 功能框图

    类似产品

    • AD5207: 双通道、256位数字电位计
    • AD5222: 双通道、增量/减量数字电位计
    • AD5242: 双通道、I2C®兼容、256位数字电位计

    More

    文档

    快讯名称 内容类型 文件类型
    AD5280/AD5282: Single/Dual, +15 V/±5 V, 256-Position, I2C-Compatible Digital Potentiometer Data Sheet (Rev C, 07/2009) (pdf, 1007 kB) 产品数据手册 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
    AN-582: AN-582采用多个器件增强数字电位计分辨率  (PDF, 228 kB)
    用户可以并联、堆叠或级联多个数字电位计,以优化特定应用的分辨率。
    应用笔记 PDF
    AN-582: Resolution Enhancements of Digital Potentiometers with Multiple Devices  (pdf, 135 kB)
    Digital Potentiometers Can Be Paralleled, Stacked or Cascaded to Optimize Resolution.
    应用笔记 PDF
    AN-580: 0: Programmable Oscillator Uses Digital Potentiometers  (pdf, 52 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
    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
    Precision Programmable Current Sources Use Digital Pots
    by Peter Khairolomour, Gary Leung, Alan Li, Analog Devices, Inc. (Design Brief, EDN, 3/31/2005)
    技术文章 HTML
    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
    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

    AD5282 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
    AD5282BRU20 产品状态: 量产 16 ld TSSOP 16 工业 Tube, 96 $ 2.53 $ 2.29 N  材料信息 查看PCN 订购
    AD5282BRU20-REEL7 产品状态: 联络ADI 16 ld TSSOP 16 工业 Reel, 1000 $ 0.00 $ 0.00 N  材料信息 查看PCN 联络ADI
    AD5282BRU200 产品状态: 量产 16 ld TSSOP 16 工业 Tube, 96 $ 2.53 $ 2.29 N  材料信息 查看PCN 订购
    AD5282BRU200-REEL7 产品状态: 最后订购时间 16 ld TSSOP 16 工业 Reel, 1000 $ 2.53 $ 2.29 N  材料信息 查看PCN/PDN 订购
    AD5282BRU50 产品状态: 量产 16 ld TSSOP 16 工业 Tube, 96 $ 2.53 $ 2.29 N  材料信息 通知我 订购
    AD5282BRU50-REEL7 产品状态: 量产 16 ld TSSOP 16 工业 Reel, 1000 $ 2.53 $ 2.29 N  材料信息 通知我 订购
    AD5282BRUZ20 产品状态: 量产 16 ld TSSOP 16 工业 Tube, 96 $ 2.19 $ 1.97 Y  材料信息 查看PCN 订购 样片
    AD5282BRUZ20-REEL7 产品状态: 量产 16 ld TSSOP 16 工业 Reel, 1000 $ 2.19 $ 1.97 Y  材料信息 查看PCN 订购
    AD5282BRUZ200 产品状态: 量产 16 ld TSSOP 16 工业 Tube, 96 $ 2.19 $ 1.97 Y  材料信息 查看PCN 订购 样片
    AD5282BRUZ200-R7 产品状态: 量产 16 ld TSSOP 16 工业 Reel, 1000 $ 2.19 $ 1.97 Y  材料信息 查看PCN 订购
    AD5282BRUZ50 产品状态: 量产 16 ld TSSOP 16 工业 Tube, 96 $ 2.19 $ 1.97 Y  材料信息 查看PCN 订购 样片
    AD5282BRUZ50-REEL7 产品状态: 量产 16 ld TSSOP 16 工业 Reel, 1000 $ 2.19 $ 1.97 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。

    AD5282 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-AD5282EBZ 产品状态: 最后订购时间 Evaluation Board $ 0.00 - 联络ADI

    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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