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AD5252:  I2C, Nonvolatile Memory, Dual 256-Position Digital Potentiometer

Информация о продукте

Статус продукта:Производство

The AD5252 is a dual channel, digitally controlled variable resistor (VR) with resolutions of 256 positions. This device performs the same electronic adjustment function as a potentiometer or variable resistor. The AD5252’s versatile programming via a Micro Controller allows multiple modes of operation and adjustment.

In the direct program mode a predetermined setting of the RDAC register can be loaded directly from the micro controller. Another key mode of operation allows the RDAC register to be refreshed with the setting previously stored in the EEMEM register. When changes are made to the RDAC register to establish a new wiper position, the value of the setting can be saved into the EEMEM by executing an EEMEM save operation. Once the settings are saved in the EEMEM register, these values will be transferred automatically to the RDAC register to set the wiper position at system power ON. Such operation is enabled by the internal preset strobe and the preset can also be accessed externally.

The basic mode of adjustment is the increment and decrement from the present setting of the Wiper position setting (RDAC) register. An internal scratch pad RDAC register can be moved UP or DOWN, one step of the nominal resistance between terminals A-and-B. This linearly changes the wiper-to-B terminal resistance (RWB) by one out of 64/256 positions of the AD5251/AD5252 end- to-end resistance (RAB). For non-linear changes in wiper setting, a left/right shift command adjusts levels in 6dB steps, which can be useful for sound and light alarm applications.

The AD5251/AD5252 is available in the thin TSSOP-14 package. All parts are guaranteed to operate over the extended industrial temperature range of -40°C to +125°C.

ОСОБЕННОСТИ И ПРЕИМУЩЕСТВА

  • Nonvolatile Memory Maintains Wiper Settings
  • Resistance Tolerance Stored In Nonvolatile Memory
  • 1 k Ω, 10 k Ω, 50 k Ω 100 k Ω
  • I2C Compatible Serial Interface
  • Wiper Settings Read Back
  • Linear Increment/Decrement Predefined Instructions
  • ±6 dB Log taper Increment/Decrement Predefined Instructions
  • Single Supply 2.7 V to 5.5 V
  • Logic Operation Voltage 3 V to 5 V
  • Power On Presets to EEMEM Settings with Refresh Time < 1 ms
  • Nonvolatile Memory Write Protection
  • 100-Year Typical Data Retention TA = 55°C

Functional Block Diagram for AD5252

Подобная продукция

  • AD5232: Nonvolatile Memory, Dual, 256-Position Digital Potentiometer
  • AD5235: Nonvolatile Memory, Dual 1024-Position Digital Potentiometer
  • AD5251: I2C, Nonvolatile Memory, Dual 64-Position Digital Potentiometer
More

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Документация

Наименование Тип контента Тип файлов
AD5251/AD5252: Dual 64-/256-Position I2C Nonvolatile Memory Digital Potentiometers Data Sheet (Rev D, 10/2012) (pdf, 607 kB) Технические описания PDF
AN-686: Implementing an I2C® Reset  (pdf, 44 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-274: Evaluation Board for the AD5252 Digital Potentiometer  (pdf, 577 kB) Руководства пользователей PDF
Choosing the Correct digiPOT for Your Application  (pdf, 431 kB) Обзор PDF
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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Programmable LDO with Precision FAQs/RAQs HTML
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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
RAQs index Rarely Asked Questions HTML
Словарь терминов Глоссарий HTML

Средства разработки, программные модели, драйверы и ПО

Наименование Тип контента Тип файлов
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 Device Drivers HTML
Digital Potentiometer Linux Driver Device Drivers HTML

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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
AD5252BRU1 Статус: Prodn 14 ld TSSOP 14 Ind Tube, 96 $ 2,06 $ 1,86 N  Используемые материалы PCN Купить
AD5252BRU1-RL7 Статус: Завершение продаж 14 ld TSSOP 14 Ind Reel, 1000 $ 2,06 $ 1,86 N  Используемые материалы PCN/ PDN Купить
AD5252BRU10 Статус: Prodn 14 ld TSSOP 14 Ind Tube, 96 $ 2,06 $ 1,86 N  Используемые материалы PCN Купить
AD5252BRU10-RL7 Статус: Prodn 14 ld TSSOP 14 Ind Reel, 1000 $ 2,06 $ 1,86 N  Используемые материалы PCN Купить
AD5252BRU100 Статус: Завершение продаж 14 ld TSSOP 14 Ind Tube, 96 $ 2,06 $ 1,86 N  Используемые материалы PCN/ PDN Купить
AD5252BRU100-RL7 Статус: Завершение продаж 14 ld TSSOP 14 Ind Reel, 1000 $ 2,06 $ 1,86 N  Используемые материалы PCN/ PDN Купить
AD5252BRU50 Статус: Завершение продаж 14 ld TSSOP 14 Ind Tube, 96 $ 2,06 $ 1,86 N  Используемые материалы PCN/ PDN Купить
AD5252BRU50-RL7 Статус: Завершение продаж 14 ld TSSOP 14 Ind Reel, 1000 $ 2,06 $ 1,86 N  Используемые материалы PCN/ PDN Купить
AD5252BRUZ1 Статус: Prodn 14 ld TSSOP 14 Ind Tube, 96 $ 1,78 $ 1,61 Y  Используемые материалы PCN Купить Образцы
AD5252BRUZ1-RL7 Статус: Prodn 14 ld TSSOP 14 Ind Reel, 1000 $ 1,78 $ 1,61 Y  Используемые материалы PCN Купить
AD5252BRUZ10 Статус: Prodn 14 ld TSSOP 14 Ind Tube, 96 $ 1,78 $ 1,61 Y  Используемые материалы PCN Купить Образцы
AD5252BRUZ10-RL7 Статус: Prodn 14 ld TSSOP 14 Ind Reel, 1000 $ 1,78 $ 1,61 Y  Используемые материалы PCN Купить
AD5252BRUZ100 Статус: Prodn 14 ld TSSOP 14 Ind Tube, 96 $ 1,78 $ 1,61 Y  Используемые материалы PCN Купить Образцы
AD5252BRUZ100-RL7 Статус: Prodn 14 ld TSSOP 14 Ind Reel, 1000 $ 1,78 $ 1,61 Y  Используемые материалы PCN Купить
AD5252BRUZ50 Статус: Prodn 14 ld TSSOP 14 Ind Tube, 96 $ 1,78 $ 1,61 Y  Используемые материалы PCN Купить Образцы
AD5252BRUZ50-RL7 Статус: Prodn 14 ld TSSOP 14 Ind Reel, 1000 $ 1,78 $ 1,61 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-AD5252SDZ Статус: Prodn Evaluation Board $ 59,00 Да -
EVAL-SDP-CB1Z Статус: Prodn Evaluation Controller Board $ 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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