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AD5170:  256位、两次可编程、 I2C 兼容型数字电位计

产品详情

AD5170是一款256位、两次可编程数字电位计1,采用熔断丝技术,用户有两次永久写入电阻设置的机会。对于不需要多次将数字电位计设置写入存储器的用户,OTP特性比EEMEM更具成本效益。该器件可实现与机械电位计或可变电阻相同的电子调整功能,而且具有增强的分辨率、固态可靠性和出色的低温度系数性能。

AD5170通过一个双线式I2C兼容型数字接口进行编程。永久设置电阻值之前,可进行无限次调整,并且有两次永久编程的机会。在OTP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)。

与传统OTP数字电位计不同,AD5170具有独特的临时OTP覆盖特性,即使熔丝熔断后,也可以进行新的调整。不过,在随后的上电过程中,OTP设置会恢复。因此,用户可以将这些数字电位计看作具有可编程预设值的易失性电位计。

针对在工厂对AD5170进行编程的应用,ADI公司还提供器件编程软件,可以在Windows NT®、Windows® 2000和Windows XP操作系统上运行。该软件能有效取代任何外部I2C控制器,从而加快用户系统上市。

应用

  • 系统校准
  • 电子电平设置
  • 在新设计中取代机械式调整器
  • 永久性工厂PCB设置
  • 压力、温度、位置、化学和光学传感器的调整
  • RF放大器偏置
  • 汽车电子调整
  • 增益控制和失调电压调整
  • * 数字电位计、VR和RDAC这些术语可以互换使用。

    数据手册, Rev. D, 7/08

    特点和优势

    • 256位数字电位计
    • 两次可编程(TTP)、一劳永逸的电阻设置,提供二次永久编程机会
    • 一次性编程(OTP)激活之前可进行无限次调整
    • OTP 覆盖特性允许根据用户自定义预设值进行动态调整
    • 端到端电阻:2.5 kΩ、10 kΩ、50 kΩ、100 kΩ
    • 紧凑型10引脚MSOP (3 mm x 4.9 mm)封装
    • 快速建立时间:tS = 5 μs(典型值,上电时)
    • 欲了解更多信息,请参考数据手册

    AD5170功能框图

    类似产品

    • AD5171:64位OTP数字电位计
    • AD5172:256位、一次性可编程、双通道、 I2C 数字电位计
    • AD5173:256位、一次性可编程、双通道、I2C数字电位计

    More

    文档

    快讯名称 内容类型 文件类型
    AD5170: 256-Position Two-Time Programmable I2C Digital Potentiometer Data Sheet  (Rev G, 05/2011) (pdf, 914 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
    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
    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

    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

    AD5170 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
    AD5170BRM10 产品状态: 量产 10 ld MSOP 10 工业 Tube, 50 $ 1.28 $ 1.16 N  材料信息 查看PCN 订购
    AD5170BRM10-RL7 产品状态: 量产 MICRO SOIC 8 工业 Reel, 1000 - $ 1.16 N  材料信息 查看PCN 订购
    AD5170BRM100 产品状态: 最后订购时间 10 ld MSOP 10 工业 Tube, 50 $ 1.28 $ 1.16 N  材料信息 查看PCN/PDN 订购
    AD5170BRM100-RL7 产品状态: 最后订购时间 10 ld MSOP 10 工业 Reel, 1000 - $ 1.16 N  材料信息 查看PCN/PDN 订购
    AD5170BRM2.5 产品状态: 最后订购时间 10 ld MSOP 10 工业 Tube, 50 $ 1.28 $ 1.16 N  材料信息 查看PCN/PDN 订购
    AD5170BRM2.5-RL7 产品状态: 最后订购时间 10 ld MSOP 10 工业 Reel, 1000 - $ 1.16 N  材料信息 查看PCN/PDN 订购
    AD5170BRM50 产品状态: 最后订购时间 10 ld MSOP 10 工业 Tube, 50 $ 1.28 $ 1.16 N  材料信息 查看PCN/PDN 订购
    AD5170BRM50-RL7 产品状态: 最后订购时间 10 ld MSOP 10 工业 Reel, 1000 - $ 1.16 N  材料信息 查看PCN/PDN 订购
    AD5170BRMZ10 产品状态: 量产 10 ld MSOP 10 工业 Tube, 50 $ 1.11 $ 1.00 Y  材料信息 查看PCN 订购 样片
    AD5170BRMZ10-RL7 产品状态: 量产 10 ld MSOP 10 工业 Reel, 1000 - $ 1.00 Y  材料信息 查看PCN 订购
    AD5170BRMZ100 产品状态: 量产 10 ld MSOP 10 工业 Tube, 50 $ 1.11 $ 1.00 Y  材料信息 查看PCN 订购 样片
    AD5170BRMZ100-RL7 产品状态: 最后订购时间 MICRO SOIC 10 工业 Reel, 1000 - $ 1.00 Y  材料信息 查看PDN 订购
    AD5170BRMZ2.5 产品状态: 量产 10 ld MSOP 10 工业 Tube, 50 $ 1.11 $ 1.00 Y  材料信息 查看PCN 订购 样片
    AD5170BRMZ2.5-RL7 产品状态: 量产 MICRO SOIC 10 工业 Reel, 1000 - $ 1.00 Y  材料信息 通知我 订购
    AD5170BRMZ50 产品状态: 量产 10 ld MSOP 10 工业 Tube, 50 $ 1.11 $ 1.00 Y  材料信息 查看PCN 订购 样片
    AD5170BRMZ50-RL7 产品状态: 最后订购时间 10 ld MSOP 10 工业 Reel, 1000 - $ 1.00 Y  材料信息 查看PDN 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。

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