AD5144

PRODUCTION

Quad Channel, 256-Position, I2C / SPI, Nonvolatile Digital Potentiometer

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Overview

  • 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
  • 4 mm × 4 mm package option
AD5144-EP Supports defense and aerospace applications (AQEC standard)
  • Download AD5144-EP data sheet (PDF)
  • Military temperature range (−55°C to +125°C)
  • Controlled manufacturing baseline
  • One assembly/test site
  • One fabrication site
  • Product change notification
  • Qualification data available on request
  • V62/20603

The AD5124/AD5144/AD5144A 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 very 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 allow for pin-to-pin connection.

The wiper values can be set through an SPI-/I2C-compatible digital interface that is also used to read back the wiper register and EEPROM contents.

The AD5124/AD5144/AD5144A are available in a compact, 24-lead, 4 mm × 4 mm LFCSP and a 20-lead TSSOP. The parts are guaranteed to operate over the extended industrial temperature range of −40°C to +125°C.

Applications

  • Portable electronics level adjustment
  • LCD panel brightness and contrast controls
  • Programmable filters, delays, and time constants
  • Programmable power supplies

The AD5144-EP supports defense and aerospace applications (AQEC).

AD5144
Quad Channel, 256-Position, I2C / SPI, Nonvolatile Digital Potentiometer
AD5124/AD5144 Functional Block Diagram AD5124/AD5144 Functional Block Diagram AD5124/AD5144 Pin Configuration AD5124/AD5144 Pin Configuration
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Tools & Simulations


Evaluation Kits

eval board
EVAL-AD5144

AD5144 Evaluation Board

Features and Benefits

  • Full featured evaluation board for AD5144 in conjunction with low voltage Digital potentiometer (digiPOT) motherboard (EVAL-MBLV-ARDZ)
  • Various test circuits
  • Various power solutions
  • Various AC/DC input signals
  • PC control in conjunction with the Analog Devices, Inc., EVALSDP-CK1Z (SDP-K1) controller board 

Product Details

With versatile programmability, the AD5144 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 AD5144 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 AD5144 can be configured as a versatile I2C or SPI serial interface. The EVAL-AD5144DBZ can operate in single-supply or dual-supply mode and incorporates an internal power supply from the USB.

Complete specifications for the AD5144 part can be found in the AD5144 data sheet.

eval board
EVAL-AD5144-2DBZ

Evaluating the AD5144 Digital Potentiometer

Features and Benefits

  • Full featured evaluation board for the AD5144 in conjunction with low voltage digital potentiometer (digiPOT) motherboard (EVAL-AD5144-2DBZ)
  • Various test circuits
  • Various power solutions
  • Various AC/DC input signals
  • PC control in conjunction with the Analog Devices, Inc., EVALSDP-CK1Z (SDP-K1) controller board

Product Details

This user guide describes the evaluation board for evaluating the AD5144—a digital potentiometer with 256 positions and nonvolatile memory. With versatile programmability, the AD5144 allows multiple modes of operation, including read/write access to the RDAC and electrically erasable programmable read-only memory (EEPROM) registers, increment/decrement of resistance, resistance changes in ±6dB scales, wiper setting readback, and extra EEPROM for storing user-defined information, such as memory data for other components or a lookup table.

The AD5144 supports dual supply (±2.25V to ±2.75V) operation and single supply (2.3V to 5.5V) operation, making the device suitable for battery-powered and other applications. The EVAL-MBLV- ARDZ incorporates an internal power supply from the USB and provides on-board 5V, 3V, and +2.5V/−2.5V supplies to EVALAD5144- 2DBZ.

The EVAL-MB-LV-ARDZ interfaces with the USB port of a PC through the system demonstration platform (SDP-K1) controller board. The ACE software is available for download on the EVALAD5144- 2DBZ product page. This software enables the user to program the AD5144. A peripheral module interface (PMOD) connection is also available that allows the connection of different microcontrollers to the EVAL-MB-LV-ARDZ without the SDP-K1 controller board. Note that when a microcontroller is used through the PMOD connection, the SDP-K1 board must be disconnected, and the user cannot use the ACE software.

Complete specifications for the AD5144 part can be found in the AD5144 data sheet, which is available from Analog Devices and must be consulted in conjunction with this user guide when using the evaluation board.

EVAL-AD5144
AD5144 Evaluation Board
AD5144 2DBZ UG 469 TOP
EVAL-AD5144-2DBZ
Evaluating the AD5144 Digital Potentiometer
EVAL-AD5144-2DBZ Board Photo Angle View EVAL-AD5144-2DBZ Board Photo Top View EVAL-AD5144-2DBZ Board Photo Bottom View

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