AD5252

I2C, Nonvolatile Memory, Dual 256-Position Digital Potentiometer

Manufactured by:

Product Details

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.

Product Lifecycle

checked Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Alternative Parts

Evaluation Kits

(1)

X +

EVAL-AD5252

EVAL-AD5252 Circuit Diagram

Product Details

With versatile programmability, the AD5252 allows multiple modes of operation, including read/write access in the RDAC and EEMEM registers, increment / decrement of resistance, resistance changes in ±6 dB scales, wiper setting read-back, and extra EEMEM for storing user-defined information, such as memory data for other components or a lookup table.

The AD5252 supports a dual-supply ±2.25 V to ±2.75 V operation and a single-supply 2.7 V to 5.5 V operation, making the device suited for battery-powered applications and many other applications. In addition, the AD5252 uses a versatile I2C serial interface that operates in fast mode, allowing speeds of up to 400 kbps and supporting the selection of up to four different I2C addresses.

The EVAL-AD5252SDZ can operate in single-supply and dual-supply mode and incorporates an internal power supply from the USB.

Complete specifications for the AD5252 part can be found in the AD5252 data sheet.

Design Resources

X +

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

AD5252 Material Declaration
PCN-PDN Information Quality And Reliability Symbols and Footprints

Discussions

X+
Didn't find what you were looking for? Ask the Analog community »

Sample & Buy

X+
Back
Check Inventory

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


Price Table Help

 
Evaluation Boards Pricing displayed is based on 1-piece.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.