Sunnyvale, Calif. Maxim Integrated Products Inc. introduced low-cost 64-tap, one-time-programmable digital potentiometers.
The one-time fuse-programmable feature sets the power-on position of the wiper, enabling these devices to power up to a unique predefined state. These linear-taper digital pots offer ratiometric and end-to-end temperature coefficients as low as 5 ppm/°C and 35 ppm/°C. The devices are guaranteed over the -40°C to +105°C operating temperature range.
The devices save power by requiring less than 1.5 μA in standby mode and operate from a +2.7 V to +5.5 V single supply. End-to-end resistances of 10 kΩ, 50 kΩ, and 100 kΩ are available. An up/down two-wire serial interface makes these new digital pots simple to operate. They are available in 8-pin, 3mm x 3mm TDFN or microMAX packages.
The potentiometers can be used in applications requiring digitally-controlled adjustable resistance, such as LCD contrast control where voltage biasing adjusts the display contrast, or for programmable filters with adjustable gain and/or cutoff frequency.
Click here for full size
Click here for functional block diagram
Pricing for the MAX5527/MAX5528/MAX5529 start at 70 cents each (1000-up, FOB USA). Click here for the MAX5527/MAX5528/MAX5529 data sheets.
Maxim, 1-800-998-8800, www.Maxim-ic.com.