Overview
The AD5228BUJZ50-RL7 is a 32-position manual up/down control digital potentiometer produced by Analog Devices Inc. This component is designed to emulate the operation of mechanical potentiometers, offering a digital alternative with enhanced reliability and precision. The AD5228 features a simple up/down control interface that can be manually controlled using just two external pushbutton tactile switches. It is equipped with a built-in adaptive debouncer to ignore invalid bounces from mechanical switches, ensuring smooth and accurate adjustments.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| End-to-End Terminal Resistance | 50 kΩ | kΩ |
| Number of Positions | 32 | - |
| Operating Voltage Range | 2.7 V to 5.5 V | V |
| Temperature Range | −40°C to +105°C | °C |
| Supply Current (Typical/Maximum) | 0.4 μA / 3 μA | μA |
| Package Type | 8-Lead TSOT-23 | - |
| Potentiometer Mode Tempco | 5 ppm/°C | ppm/°C |
| Rheostat Mode Tempco | 35 ppm/°C | ppm/°C |
Key Features
- Simple manual up/down control interface using two external pushbutton tactile switches.
- Built-in adaptive debouncer to ignore invalid bounces from mechanical switches.
- Autoscan mode with 4 steps per second when the button is held continuously.
- Pin-selectable zero-scale/midscale preset.
- Low power consumption with IDD = 0.4 μA typical and 3 μA maximum.
- Compact thin SOT-23-8 (TSOT-8) package.
- Digital control compatible, simplifying microcontroller usage.
Applications
- Mechanical potentiometer and trimmer replacements.
- LCD backlight, contrast, and brightness controls.
- Digital volume control.
- Portable device-level adjustments.
- Electronic front panel-level controls.
- Programmable power supply.
Q & A
- What is the AD5228BUJZ50-RL7 used for?
The AD5228BUJZ50-RL7 is used as a digital potentiometer to replace mechanical potentiometers and trimmers in various applications.
- How is the AD5228 controlled?
The AD5228 can be controlled manually using two external pushbutton tactile switches or digitally through a microcontroller.
- What is the operating voltage range of the AD5228?
The operating voltage range is from 2.7 V to 5.5 V.
- What is the temperature range of the AD5228?
The temperature range is from −40°C to +105°C.
- What is the typical supply current of the AD5228?
The typical supply current is 0.4 μA, with a maximum of 3 μA.
- What package type does the AD5228 come in?
The AD5228 comes in an 8-Lead TSOT-23 package.
- What is the potentiometer mode temperature coefficient of the AD5228?
The potentiometer mode temperature coefficient is 5 ppm/°C.
- How does the autoscan mode work?
When the button is held continuously for more than a second, the device activates the autoscan mode and changes four resistance steps per second.
- What are some common applications of the AD5228?
Common applications include LCD backlight and brightness controls, digital volume control, portable device adjustments, and electronic front panel controls.
- Does the AD5228 have built-in debouncing?
Yes, the AD5228 has a built-in adaptive debouncer to ignore invalid bounces from mechanical switches.
