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AD5124 Dataheets PDF



Part Number AD5124
Manufacturers Analog Devices
Logo Analog Devices
Description Nonvolatile Digital Potentiometer
Datasheet AD5124 DatasheetAD5124 Datasheet (PDF)

Data Sheet FEATURES 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 APPLICATIONS Portable electronics level adjustment LCD panel brightness and contrast controls Programmable filters, delays, and time .

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Data Sheet FEATURES 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 APPLICATIONS Portable electronics level adjustment LCD panel brightness and contrast controls Programmable filters, delays, and time constants Programmable power supplies Quad Channel, 128-/256-Position, I2C/SPI, Nonvolatile Digital Potentiometer AD5124/AD5144/AD5144A FUNCTIONAL BLOCK DIAGRAM VLOGIC VDD LRDAC POWER-ON RESET RESET DIS SCLK/SCL SDI/SDA SYNC/ADDR0 SDO/ADDR1 SERIAL INTERFACE 7/8 AD5124/AD5144 RDAC1 A1 INPUT REGISTER 1 W1 B1 RDAC2 A2 INPUT REGISTER 2 W2 B2 RDAC3 A3 INPUT REGISTER 3 W3 B3 RDAC4 A4 INPUT REGISTER 4 W4 B4 EEPROM MEMORY 10877-001 GND VSS WP Figure 1. AD5124/AD5144 24-Lead LFCSP GENERAL DESCRIPTION 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. Table 1. Family Models Model Channel Position AD51231 Quad 128 AD5124 Quad 128 AD5124 Quad 128 AD51431 Quad 256 AD5144 Quad 256 AD5144 Quad 256 AD5144A Quad 256 AD5122 Dual 128 AD5122A Dual 128 AD5142 Dual 256 AD5142A Dual 256 AD5121 Single 128 AD5141 Single 256 Interface I2C SPI/I2C SPI I2C SPI/I2C SPI I2C SPI I2C SPI I2C SPI/I2C SPI/I2C Package LFCSP LFCSP TSSOP LFCSP LFCSP TSSOP TSSOP LFCSP/TSSOP LFCSP/TSSOP LFCSP/TSSOP LFCSP/TSSOP LFCSP LFCSP 1 Two potentiometers and two rheostats. Rev. C Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2012–2019 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com AD5124/AD5144/AD5144A TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Functional Block Diagrams—TSSOP ............................................ 3 Specifications..................................................................................... 4 Electrical Characteristics—AD5124 .......................................... 4 Electrical Characteristics—AD5144 and AD5144A................ 7 Interface Timing Specifications ................................................ 10 Shift Register and Timing Diagrams ....................................... 11 Absolute Maximum Ratings.......................................................... 13 Thermal Resistance .................................................................... 13 ESD Caution................................................................................ 13 Pin Configurations and Function Descriptions ......................... 14 Typical Performance Characteristics ........................................... 17 Test Circuits...............................................................


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