Features and Benefits
- One-time programmable (OTP)1 set-and-forget
Resistance setting—low cost alternative over EEMEM
Unlimited adjustments prior to OTP activation
- 1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ end-to-end terminal resistance
- Compact 8-lead SOT-23 standard package
- Ultralow power: IDD = 5 μA maximum
- Fast settling time: tS = 5 μs typical during power-up
- I2C-compatible digital interface
- See data sheet for additional information
The AD5273 is a 64-position, one-time programmable (OTP) digital potentiometer4 that employs fuse link technology to achieve permanent program setting. This device performs the same electronic adjustment function as most mechanical trimmers and variable resistors. It allows unlimited adjustments before permanently setting the resistance values. The AD5273 is programmed using a 2-wire, I2C®-compatible digital control. During write mode, a fuse blow command is executed after the final value is determined, thereby freezing the wiper position at a given setting (analogous to placing epoxy on a mechanical trimmer). When the permanent setting is achieved, the value does not change, regardless of the supply variations or environ-mental stresses under normal operating conditions. To verify the success of permanent programming, Analog Devices, Inc., patterned the OTP validation such that the fuse status can be discerned from two validation bits in the read mode.
In addition, for applications that program the AD5273 at the factory, Analog Devices offers device programming software2 running on Windows NT®, Windows® 2000, and Windows XP operating systems. This software application effectively replaces any external I2C controllers, which in turn enhances the user system’s time-to-market.
The AD5273 is available in 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ resistances and in a compact 8-lead SOT-23 standard package. It operates from −40°C to +105°C.
Along with its unique OTP feature, the AD5273 lends itself well to general digital potentiometer applications due to its effective resolution, array resistance options, small footprint, and low cost.
An AD5273 evaluation kit and software are available. The kit includes the connector and cable that can be converted for factory programming applications.
For applications that require dynamic adjustment of resistance settings with nonvolatile EEMEM, refer to the AD5231, AD5232, AD5233, and AD5235 family, and the AD5251, AD5252, AD5254, AD5258, and AD5259 family of nonvolatile memory digital potentiometers.
- System calibrations
- Electronics level settings
- Mechanical potentiometers and trimmer replacement
- Transducer circuit adjustments
- Programmable filters up to 6 MHz BW3
1 OTP allows unlimited adjustments before permanent setting.
2 Analog Devices cannot guarantee the software to be 100% compatible to all systems due to the wide variation in computer configurations.
3 Applies to 1 kΩ parts only.
4 The terms digital potentiometer, VR, and RDAC are used interchangeably.
Product Lifecycle 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.
Evaluation Kits (1)
The AD5273 supports single-supply 2.7 V to 5.5 V operation, making the device suited for battery-powered applications and many other applications with superior low temperature coefficient performance.
The on-board socket allows the user to easily replace the device for reprogramming of the OTP memory.
In addition, the AD5273 uses a versatile I2C serial interface that operates in fast mode, allowing speeds of up to 400 kHz.
The EVAL-MB-LV-SDZ can operate in single-supply mode and incorporates an internal power supply from the USB.
Complete specifications for the AD5273 part can be found in the AD5273 data sheet.
Software & Systems Requirements
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.
Sample & Buy
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.
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