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AD5144A

Analog Devices
Part Number AD5144A
Manufacturer Analog Devices
Description Nonvolatile Digital Potentiometer
Published Nov 18, 2012
Detailed Description Data Sheet FEATURES 10 kΩ and 100 kΩ resistance options Resistor tolerance: 8% maximum Wiper current: ±6 mA Low temperat...
Datasheet PDF File AD5144A PDF File

AD5144A
AD5144A

Overview
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...


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