Features and Benefits
- 10 kΩ and 100 kΩ resistance options
- Resistor tolerance: ±8% maximum
- Wiper current: ±6 mA
- Low temperature coefficient: 35 ppm/°C
- Wide bandwidth: 3 MHz
- Fast start-up time <75 μs
- Linear gain setting mode
- Single- and dual-supply operation
- Independent logic supply: 1.8 V to 5.5 V
- Wide operating temperature: −40°C to +125°C
- 3 mm × 3 mm package option
- Qualified for automotive applications
The AD5122/AD5142 potentiometers provide a nonvolatile solution for 128-/256-position adjustment applications, offering guaranteed low resistor tolerance errors of ±8% and up to ±6 mA current density in the Ax, Bx, and Wx pins.
The low resistor tolerance and low nominal temperature coefficient simplify open-loop applications as well as applications requiring tolerance matching.
The linear gain setting mode allows independent programming of the resistance between the digital potentiometer terminals through the RAW and RWB string resistors, allowing accurate resistor matching.
The high bandwidth and low total harmonic distortion (THD) ensure optimal performance for ac signals, making these devices suitable for filter design.
The low wiper resistance of only 40 Ω at the ends of the resistor array allows for pin to pin connection.
The wiper values can be set through an SPI-compatible digital interface that also reads back the wiper register and EEPROM contents.
The AD5122/AD5142 is available in a compact, 16-lead, 3 mm × 3 mm LFCSP and a 16-lead TSSOP. The parts are guaranteed to operate over the extended industrial temperature range of −40°C to +125°C.
- Portable electronics level adjustment
- LCD panel brightness and contrast controls
- Programmable filters, delays, and time constants
- Programmable power supplies
Markets and Technologies
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)
With versatile programmability, the AD5142 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 AD5142 supports a dual-supply ±2.25 V to ±2.75 V operation and a single-supply 2.3 V to 5.5 V operation, making the device suitable for battery-powered applications and many other applications. In addition, the AD5142 uses a versatile SPI-compatible serial interface, allowing speeds of up to 50 MHz. The EVAL-AD5142DBZ can operate in single-supply or dual-supply mode and incorporates an internal power supply from the USB.
Complete specifications for the AD5142 part can be found in the AD5142 datasheet.
Documentation & Resources
Tools & Simulations
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.
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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.