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The AD5204 provides a 4-channel, 256-position digitally controlled variable resistor (VR) devices. This device performs the same electronic adjustment function as a potentiometer or variable resistor. Each channel of the AD5204 contains a fixed resistor with a wiper contact that taps the fixed resistor value at a point determined by a digital code loaded into the SPI-compatible serial-input register. The resistance between the wiper and either endpoint of the fixed resistor varies linearly with respect to the digital code transferred into the VR latch. The variable resistor offers a completely programmable value of resistance between the A terminal and the wiper or the B terminal and the wiper. The fixed A-to-B terminal resistance of 10 kΩ, 50 kΩ, or 100 kΩ has a nominal temperature coefficient of 700 ppm/°C.

Each VR has its own VR latch that holds its programmed resistance value. These VR latches are updated from an internal serial-to-parallel shift register that is loaded from a standard 3-wire serial-input digital interface. Eleven data bits make up the data-word clocked into the serial input register. The first three bits are decoded to determine which VR latch is loaded with the last eight bits of the data-word when the CS strobe is returned to logic high. A serial data output pin at the opposite end of the serial register (AD5204 only) allows simple daisy chaining in multiple VR applications without requiring additional external decoding logic.

An optional reset (PR) pin forces all the AD5204 wipers to the midscale position by loading 0x80 into the VR latch.

The AD5204 is available in the 24-lead surface-mount SOIC, TSSOP, PDIP packages and in a 32-lead, 5 mm × 5 mm LFCSP package. All parts are guaranteed to operate over the extended industrial temperature range of −40°C to +85°C. For additional single-, dual-, and quad-channel devices, see the AD8400/AD8402/AD8403 data sheets.

Applications

  • Mechanical potentiometer replacement
  • Instrumentation: gain, offset adjustment
  • Programmable voltage-to-current conversion
  • Programmable filters, delays, time constants
  • Line impedance matching

ОСОБЕННОСТИ И ПРЕИМУЩЕСТВА

  • 256 positions
  • Multiple independently programmable channels
    AD5204—4-channel
    AD5206—6-channel
  • Potentiometer replacement
  • Terminal resistance of 10 kΩ, 50 kΩ, 100 kΩ
  • 3-wire SPI-compatible serial data input
  • +2.7 V to +5.5 V single-supply operation; ±2.7 V dual-supply operation
  • Power-on midscale preset

AD5204 Functional Block Diagram

Подобная продукция

  • AD5206: 6-Channel, 256-Position Digital Potentiometer
  • AD5263: Quad, 15 V, 256-Position Digital Potentiometer with Pin-Selectable SPI/I2C
More

Документация

Наименование Тип контента Тип файлов
AD5204/AD5206: 4-/6-Channel Digital Potentiometers Data Sheet  (Rev C, 07/2010) (pdf, 475 kB) Технические описания PDF
AN-686: Implementing an I2C® Reset  (pdf, 44 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
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-345: Evaluation Board for the AD5204 Digital Potentiometer  (pdf, 598 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
Programmable 5-30V Power Supply FAQs/RAQs HTML
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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
RAQs index Rarely Asked Questions HTML
Словарь терминов Глоссарий HTML

Средства разработки, программные модели, драйверы и ПО

Наименование Тип контента Тип файлов
AD5206 IBIS Model  (ibs) Модели IBIS IBS
Digital Potentiometer Linux Driver Device Drivers HTML

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Модели Корпуса Выводы Температурный
диапазон
Упаковка,
количество
Цена*(100-499) Цена*1000 шт. Без использования свинца PCN/PDN Проверка наличия/
Покупка/Запрос образца
AD5204BCPZ10-REEL Статус: Prodn 32 ld LFCSP (5x5mm) w/3.3mm exposed pad 32 Ind Reel, 5000 - $ 1,52 Y  Используемые материалы PCN Купить
AD5204BCPZ10-REEL7 Статус: Prodn 32 ld LFCSP (5x5mm) w/3.3mm exposed pad 32 Ind Reel, 1500 - $ 1,52 Y  Используемые материалы PCN Купить
AD5204BR10 Статус: Prodn 24 ld SOIC - Wide 24 Ind Tube, 31 $ 1,94 $ 1,75 N  Используемые материалы PCN Купить
AD5204BRU10-REEL7 Статус: Obsolete 24 ld TSSOP 24 Ind Reel, 1000 - $ 0,00 N  Используемые материалы PCN/ PDN Контакты
AD5204BRUZ10 Статус: Prodn 24 ld TSSOP 24 Ind Tube, 62 $ 1,68 $ 1,52 Y  Используемые материалы PCN Купить Образцы
AD5204BRUZ10-REEL7 Статус: Prodn 24 ld TSSOP 24 Ind Reel, 1000 - $ 1,52 Y  Используемые материалы PCN Купить
AD5204BRUZ100 Статус: Prodn 24 ld TSSOP 24 Ind Tube, 62 $ 1,68 $ 1,52 Y  Используемые материалы PCN Купить Образцы
AD5204BRUZ100-R7 Статус: Prodn 24 ld TSSOP 24 Ind Reel, 1000 - $ 1,52 Y  Используемые материалы PCN Купить
AD5204BRUZ50 Статус: Prodn 24 ld TSSOP 24 Ind Tube, 62 $ 1,68 $ 1,52 Y  Используемые материалы PCN Купить Образцы
AD5204BRUZ50-REEL7 Статус: Prodn 24 ld TSSOP 24 Ind Reel, 1000 - $ 1,52 Y  Используемые материалы PCN Купить
AD5204BRZ10 Статус: Prodn 24 ld SOIC - Wide 24 Ind Tube, 31 $ 1,68 $ 1,52 Y  Используемые материалы PCN Купить Образцы
AD5204BRZ100 Статус: Prodn 24 ld SOIC - Wide 24 Ind Tube, 31 $ 1,68 $ 1,52 Y  Используемые материалы PCN Купить Образцы
AD5204BRZ50 Статус: Obsolete 24 ld SOIC - Wide 24 Ind Tube, 31 - - Y  Используемые материалы PCN/ PDN Контакты
AD5204BRZ50-REEL Статус: Prodn 24 ld SOIC - Wide 24 Ind Reel, 1000 - $ 1,52 Y  Используемые материалы PCN Купить
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