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AD5232:  Nonvolatile Memory, Dual, 256-Position Digital Potentiometer

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Статус продукта:Производство

The AD5232 device provides a nonvolatile, dual-channel, digitally controlled variable resistor (VR) with 256-position resolution. This device performs the same electronic adjustment function as a mechanical potentiometer with enhanced resolution, solid state reliability, and superior low temperature coefficient performance. The versatile programming of the AD5232, per-ormed via a microcontroller, allows multiple modes of operation and adjustment.

In the direct program mode, a predetermined setting of the RDAC registers (RDAC1 and RDAC2) can be loaded directly from the microcontroller. Another important mode of operation allows the RDACx register to be refreshed with the setting previously stored in the corresponding EEMEM register (EEMEM1 and EEMEM2). When changes are made to the RDACx register to establish a new wiper position, the value of the setting can be saved into the EEMEMx register by executing an EEMEM save operation. After the settings are saved in the EEMEMx register, these values are automatically transferred to the RDACx register to set the wiper position at system power-on. Such operation is enabled by the internal preset strobe. The preset strobe can also be accessed externally.

All internal register contents can be read via the serial data output (SDO). This includes the RDAC1 and RDAC2 registers, the corresponding nonvolatile EEMEM1 and EEMEM2 registers, and the 14 spare USER EEMEM registers that are available for constant storage.

The basic mode of adjustment is the increment and decrement command instructions that control the wiper position setting register (RDACx). An internal scratch pad RDACx register can be moved up or down one step of the nominal resistance between Terminal A and Terminal B. This step adjustment linearly changes the wiper to Terminal B resistance (RWB) by one position segment of the device’s end-to-end resistance (RAB). For exponential/ logarithmic changes in wiper setting, a left/right shift command instruction adjusts the levels in ±6 dB steps, which can be useful for audio and light alarm applications.

The AD5232 is available in a thin, 16-lead TSSOP package. All parts are guaranteed to operate over the extended industrial temperature range of −40°C to +85°C. An evaluation board, the EVAL-AD5232-10EBZ, is available.

APPLICATIONS

  • Mechanical potentiometer replacement
  • Instrumentation: gain and offset adjustment
  • Programmable voltage-to-current conversion
  • Programmable filters, delays, and time constants
  • Programmable power supply
  • Low resolution DAC replacement
  • Sensor calibration
  • ОСОБЕННОСТИ И ПРЕИМУЩЕСТВА

    • Dual-channel, 256-position resolution
    • 10 kΩ, 50 kΩ, and 100 kΩ nominal terminal resistance
    • Nonvolatile memory maintenance of wiper settings
    • Predefined linear increment/decrement instructions
    • Predefined ±6 dB step log taper increment/decrement instructions
    • SPI-compatible serial interface
    • Wiper settings and EEMEM readback
    • 3 V to 5 V single-supply operation
    • ±2.5 V dual-supply operation
    • 14 bytes of general-purpose user EEMEM
    • Permanent memory write protection
    • 100-year typical data retention (TA = 55°C)

    Functional Block Diagram for AD5232

    AD5232 Diagram
    Functional Block Diagram for AD5232

    Подобная продукция

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    Документация

    Наименование Тип контента Тип файлов
    AD5232: Nonvolatile Memory, Dual 256-Position Digital Potentiometer Data Sheet (Rev C, 11/2013) (pdf, 278 kB) Технические описания PDF
    AN-686: Implementing an I2C® Reset  (pdf, 44 kB) Статьи по применению PDF
    AN-585: AD5232–Programmable Oscillator Using Digital Potentiometers  (pdf, 102 kB) Статьи по применению 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.
    Статьи по применению PDF
    AN-580: 0: Programmable Oscillator Uses Digital Potentiometers  (pdf, 52 kB) Статьи по применению PDF
    AN-579: Versatile Programmable Amplifiers Using Digital Potentiometers with Nonvolatile Memory  (pdf, 90 kB) Статьи по применению PDF
    Choosing the Correct digiPOT for Your Application  (pdf, 431 kB) Руководства по проектированию 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.
    Webcasts WEBCAST
    UG-347: Evaluation Board for the AD5232 Digital Potentiometer  (pdf, 679 kB) Руководства пользователей PDF
    Versatile Programmable Amplifiers Use Digital Potentiometers with Nonvolatile Memory
    (Analog Dialogue, Vol. 35, No. 3, June-July, 2001)
    Журнал Analog Dialogue HTML
    Choosing the Correct digiPOT for Your Application  (pdf, 431 kB) Обзор PDF
    RAQs index Rarely Asked Questions HTML
    Is there a power up sequence I should follow? FAQs/RAQs 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? FAQs/RAQs HTML
    Is there a dependency between the logic level and power consumption? FAQs/RAQs HTML
    Is digital potentiometer a real replacement for mechanical potentiometer or are there restrictions regarding voltage potentials? FAQs/RAQs HTML
    Are all digital potentiometers limited to |5V|? FAQs/RAQs HTML
    Do digital potentiometers handle bipolar and AC operations? FAQs/RAQs HTML
    Can I achieve a 15V signal swing when using a 5V digital potentiometer? FAQs/RAQs HTML
    For digital potentiometers that do not have nonvolatile memory, what is the state during power up? FAQs/RAQs HTML
    Is there a particularly low-power digital potentiometer? FAQs/RAQs HTML
    Does the memory allow the device to return to the last stored value without an update from a micro? FAQs/RAQs HTML
    Will the data in the EEMEM need to be refreshed after 15 yrs when it is operated at 55°C? FAQs/RAQs HTML
    How many write cycles can the EEMEM go through before it fails? FAQs/RAQs 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"? FAQs/RAQs HTML
    Why are some digital potentiometers' maximum operating temperature only 85°C instead of the standard 125°C? FAQs/RAQs HTML
    How good is the resistance matching between Ch1 and Ch2 in the dual digital potentiometer? FAQs/RAQs HTML
    How is the resistance matching device to device? FAQs/RAQs HTML
    What is the resistance tolerance of the digital potentiometers? FAQs/RAQs 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. FAQs/RAQs HTML
    I would like to know how the digital potentiometer is built. How ideal are the wiper switches? FAQs/RAQs HTML
    What is the tempco of the digital potentiometer? FAQs/RAQs HTML
    What is the maximum current I can force into the digital potentiometer? FAQs/RAQs HTML
    Can a digitally controlled variable resistor withstand greater than 20mA? FAQs/RAQs HTML
    Can a digipot be used to construct a programmable high current source? FAQs/RAQs 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? FAQs/RAQs 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? FAQs/RAQs 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. FAQs/RAQs HTML
    Can I adjust the digital potentiometer for frequencies around 1MHz to 10MHz for adjusting the gain of a video signal? FAQs/RAQs HTML
    What is the maximum frequency that can be applied to the digital potentiometer CLK input? FAQs/RAQs 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? FAQs/RAQs HTML
    If I program Ch 1 from zero to full scale, will I expect Ch 2 to be disturbed? FAQs/RAQs HTML
    Digital Feedthrough FAQs/RAQs HTML
    How is the THD performance of digital potentiometer? FAQs/RAQs HTML
    If I use the digital potentiometer in audio volume control, will I experience zipper noise? FAQs/RAQs HTML
    For a digital potentiometer that requires 6-bit word length, what happens if I have 8-bit word length from my PC? FAQs/RAQs HTML
    For a digital potentiometer that requires 12-bit word length, how can I control with only 8-bit word length from my micro? FAQs/RAQs HTML
    Do you provide any software to control the digital potentiometers? FAQs/RAQs 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? FAQs/RAQs HTML
    Can I program two channels of a multi-channel digital potentiometer at the same time? FAQs/RAQs HTML
    Can I read back the wiper setting of the digital potentiometers? FAQs/RAQs HTML
    Can I read back the contents of the two RDAC registers of AD5242 or AD5282 (dual I2C compatible digital potentiometer)? FAQs/RAQs HTML
    Is there a digital potentiometer controlled by a parallel input? FAQs/RAQs HTML
    Can digital potentiometers do log taper adjustment? FAQs/RAQs HTML
    I'm unsure about how to use pin 13 write protect (/WP), pin 14 preset (/PR), and pin 16 ready (RDY)? FAQs/RAQs HTML
    Why Should I replace mechanical potentiometers with digiPOT? FAQs/RAQs HTML
    What should I watch out for when I replace mechanical potentiometers with digital potentiometers? FAQs/RAQs HTML
    What is the ESD rating of digital potentiometers? FAQs/RAQs HTML
    How do I tell the end-to-end RAB resistance value? FAQs/RAQs HTML
    What are the common failure modes of digital potentiometers? FAQs/RAQs HTML
    Are there any evaluation boards for the digital potentiometers? FAQs/RAQs HTML
    Are PB-free digital potentiometers available? FAQs/RAQs HTML
    Can I use the new PB-free DigiPOTs in my traditional solder based PCB assembly process? FAQs/RAQs HTML
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    Adjustable Voltage Source for Driving LED FAQs/RAQs HTML
    Adjustable Current Source for Driving Single LED FAQs/RAQs HTML
    Adjustable Current Source for Driving Multiple LEDs FAQs/RAQs HTML
    Programmable Bidirectional Current Source FAQs/RAQs HTML
    High Power RGB LEDs Driver FAQs/RAQs HTML
    Automatic LED Brightness Control FAQs/RAQs HTML
    High Voltage DAC FAQs/RAQs HTML
    Bipolar DAC with EEPROM FAQs/RAQs HTML
    Voltage-to-Current Conversion FAQs/RAQs HTML
    Programmable Low Pass Filter FAQs/RAQs HTML
    Programmable State-Variable Filter FAQs/RAQs HTML
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    Audio Volume Control FAQs/RAQs HTML
    Audio Amplifier Volume Control FAQs/RAQs HTML
    LCD Panel VCOM Adjustment FAQs/RAQs HTML
    Laser Bias and Modulation Current Biasing FAQs/RAQs HTML
    Manual Rotary Control FAQs/RAQs HTML
    Bipolar Programmable Gain Amplifier FAQs/RAQs HTML
    Programmable Current-Sensing Amplifier FAQs/RAQs HTML
    6-Bit Controller FAQs/RAQs HTML
    Level Shifting Digital Inputs from 3.3V to 5V or Vice Versa FAQs/RAQs HTML
    Level Shifting Digital Signals from 0V to +5V to -5V to 0V FAQs/RAQs HTML
    Multiple I2C Slave Devices Addressing FAQs/RAQs HTML
    Resolution Enhancement FAQs/RAQs HTML
    Pseudo Memory Retention FAQs/RAQs HTML
    Словарь терминов Глоссарий HTML

    Средства разработки, программные модели, драйверы и ПО

    Наименование Тип контента Тип файлов
    BeMicro FPGA Project for AD5232 with Nios driver FPGA HDL HTML
    AD5232 FMC-SDP Interposer & Evaluation Board / Xilinx KC705 Reference Design FPGA HDL HTML
    Digital Potentiometer Linux Driver Device Drivers HTML

    Оценочные наборы, обозначения компонентов и шаблоны посадочных мест на ПП

    Оценочные платы и наборыОзнакомьтесь с документацией и условиями покупки

    Обозначения и посадочные места— Analog Devices предлагает библиотеки компонентов, совместимые с широким спектром современных САПР.

    SampleОбразцы / Покупка

    Цены, исполнение ИМС, наличие на складе

    Модели Корпуса Выводы Температурный
    диапазон
    Упаковка,
    количество
    Цена*(100-499) Цена*1000 шт. Без использования свинца PCN/PDN Проверка наличия/
    Покупка/Запрос образца
    AD5232BRU10 Статус: Prodn 16 ld TSSOP 16 Ind Tube, 96 $ 3,45 $ 3,13 N  Используемые материалы PCN Купить
    AD5232BRU10-REEL7 Статус: Prodn TSSOP 4.4 MM 16 Ind Reel, 1000 - $ 3,13 N  Используемые материалы PCN Купить
    AD5232BRU50 Статус: Prodn 16 ld TSSOP 16 Ind Tube, 96 $ 3,45 $ 3,13 N  Используемые материалы PCN Купить
    AD5232BRUZ10 Статус: Prodn 16 ld TSSOP 16 Ind Tube, 96 $ 2,99 $ 2,70 Y  Используемые материалы PCN Купить Образцы
    AD5232BRUZ10-REEL7 Статус: Prodn 16 ld TSSOP 16 Ind Reel, 1000 $ 2,99 $ 2,70 Y  Используемые материалы PCN Купить
    AD5232BRUZ100 Статус: Prodn 16 ld TSSOP 16 Ind Tube, 96 $ 2,99 $ 2,70 Y  Используемые материалы PCN Купить Образцы
    AD5232BRUZ50 Статус: Prodn 16 ld TSSOP 16 Ind Tube, 96 $ 2,99 $ 2,70 Y  Используемые материалы PCN Купить Образцы
    AD5232BRUZ50-REEL7 Статус: Prodn 16 ld TSSOP 16 Ind Reel, 1000 - $ 2,70 Y  Используемые материалы PCN Купить
    Помощь

    Приведенные цены действительны в США и указаны только для примерного бюджетного рассчета. Цены указаны в долларах США (за штуку в указанном размере партии) и могут быть изменены. Цены в других регионах могут отличаться в зависимости от местных пошлин, налогов, сборов и курсов валют. Для уточнения стоимости обращайтесь в местные офисы продаж Analog Devices, или к официальным дистрибьюторам. Цены на оценочные платы и наборы указаны за штуку независимо от количества.

    Модели Описание Цена Без использования свинца PCN/PDN Проверка наличия/
    Покупка/Запрос образца
    EVAL-AD5232SDZ Статус: Prodn Evaluation Board $ 59,00 Да -
    EVAL-SDP-CB1Z Статус: Prodn Evaluation Controller Boa $ 99,00 Да -

    Цены указаны за одну штуку, в долларах США, на условиях ФОБ. Являются рекомендованными розничными ценами в США, приведены только для примерного расчета и могут меняться. Международные цены могут отличаться на величину местных пошлин, налогов, сборов и курсов валют.

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