Product Details
●The AD5227 is Analog Devices’ latest 64-step up/down control digital potentiometer1. This device performs the same electronic adjustment function as a 5 V potentiometer or variable resistor. Its simple 3-wire up/down interface allows manual switching or high speed digital control. The AD5227 presets to midscale at power-up. When CS is enabled, the devices changes step at every clock pulse. The direction is determined by the state of the U/D pin (see ). The interface is simple to activate by any host controller, discrete logic, or manually with a rotary encoder or pushbuttons. The AD5227’s 64-step resolution, small footprint, and simple interface enable it to replace mechanical potentiometers and trimmers with typically 6× improved resolution, solid-state reliability, and design layout flexibility, resulting in a considerable cost savings in end users’ systems.
●The AD5227 is available in a compact thin SOT-23-8 (TSOT-8) Pb-free package. The part is guaranteed to operate over the automotive temperature range of −40°C to +105°C.
●Users who consider EEMEM potentiometers should refer to some recommendations in the Applications section.
●Applications
● Mechanical potentiometer and trimmer replacements
● LCD backlight, contrast, and brightness controls
● Portable electronics level adjustment
● Programmable power supply
● Digital trimmer replacements
● Automatic closed-loop control
●1RWA increments if RWB decrements and vice versa.
●### Features and Benefits
● 64-position digital potentiometer
● 10 kΩ, 50 kΩ, 100 kΩ end-to-end terminal resistance
● Simple up/down digital or manual configurable control
● Midscale preset
● Low potentiometer mode tempco = 10 ppm/°C
● Low rheostat mode tempco =
●35 ppm/°C
● Ultralow power, IDD = 0.4 μA typ and
●3 μA max
● Fast adjustment time, ts = 1 μs
● Chip select enable multiple device operation
● Low operating voltage, 2.7 V to 5.5 V
● Automotive temperature range, −40°C to +105°C
● Compact thin SOT-23-8
●(2.9 mm × 3 mm) Pb-free package
