AD5227EVAL: 64-Position Digital Up/Down Control Potentiometer
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
AD5227EVAL 应用领域 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
AD5227EVAL 特点
- 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
AD5227EVAL 功能框图
| 产品型号 | 产品状态 | 封装 | 引脚 | 温度范围 |
|---|---|---|---|---|
| AD5227BUJZ10-R2 | 量产 | 8 ld TSOT | 8 | 汽车级 |
| AD5227BUJZ10-RL7 | 量产 | 8 ld TSOT | 8 | 汽车级 |
| AD5227BUJZ100-R2 | 量产 | 8 ld TSOT | 8 | 汽车级 |
| AD5227BUJZ100-RL7 | 量产 | 8 ld TSOT | 8 | 汽车级 |
| AD5227BUJZ50-R2 | 量产 | 8 ld TSOT | 8 | 汽车级 |
| AD5227BUJZ50-RL7 | 量产 | 8 ld TSOT | 8 | 汽车级 |
| AD5227EVAL | 量产 | 评估板 | - | 汽车级 |
