AD5227BUJZ50-RL7

64位向上/向下控制数字电位器 64-Position Up/Down Control Digital Potentiometer

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

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64-position digital potentiometer

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10 kΩ, 50 kΩ, 100 kΩ end-to-end terminal resistance

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Simple up/down digital or manual configurable control

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Midscale preset

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Low potentiometer mode tempco = 10 ppm/°C

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Low rheostat mode tempco =

35 ppm/°C

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Ultralow power, IDD = 0.4 μA typ and

3 μA max

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Fast adjustment time, ts = 1 μs

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Chip select enable multiple device operation

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Low operating voltage, 2.7 V to 5.5 V

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Automotive temperature range, −40°C to +105°C

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Compact thin SOT-23-8

2.9 mm × 3 mm Pb-free package