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AD5142ABCPZ10-RL7 Fiches technique(PDF) 1 Page - Analog Devices |
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AD5142ABCPZ10-RL7 Fiches technique(HTML) 1 Page - Analog Devices |
1 / 32 page Dual Channel, 128-/256-Position, I2C, Nonvolatile Digital Potentiometer Data Sheet AD5122A/AD5142A Rev. A Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2012 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com 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 3 mm × 3 mm package option 4 kV ESD protection APPLICATIONS Portable electronics level adjustment LCD panel brightness and contrast controls Programmable filters, delays, and time constants Programmable power supplies FUNCTIONAL BLOCK DIAGRAM VDD INDEP VSS GND VLOGIC 7/8 SERIAL INTERFACE POWER-ON RESET RDAC1 INPUT REGISTER 1 RDAC2 INPUT REGISTER 2 EEPROM MEMORY A1 W1 B1 A2 W2 B2 AD5122A/ AD5142A SCL SDA RESET ADDR1 ADDR0 Figure 1. GENERAL DESCRIPTION The AD5122A/AD5142A 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 RAW and RWB the string resistors, allowing very accurate resistor matching. The high bandwidth and low total harmonic distortion (THD) ensure optimal performance for ac signals, making it 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 I2C-compatible digital interface that is also used to read back the wiper register and EEPROM contents. The AD5122A/AD5142A are 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. Table 1. Family Models Model Channel Position Interface Package AD51231 Quad 128 I2C LFCSP AD5124 Quad 128 SPI/I2C LFCSP AD5124 Quad 128 SPI TSSOP AD51431 Quad 256 I2C LFCSP AD5144 Quad 256 SPI/I2C LFCSP AD5144 Quad 256 SPI TSSOP AD5144A Quad 256 I2C TSSOP AD5122 Dual 128 SPI LFCSP/TSSOP AD5122A Dual 128 I2C LFCSP/TSSOP AD5142 Dual 256 SPI LFCSP/TSSOP AD5142A Dual 256 I2C LFCSP/TSSOP AD5121 Single 128 SPI/I2C LFCSP AD5141 Single 256 SPI/I2C LFCSP 1 Two potentiometers and two rheostats. |
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