Overview
The AD5228BUJZ100-RL7, produced by Analog Devices Inc., is a 32-position manual up/down control digital potentiometer. This device emulates the operation of a mechanical potentiometer, offering a simple and reliable solution for various applications. It features a compact 8-lead TSOT-23 package and operates over an automotive temperature range of −40°C to +105°C. The AD5228 is designed to replace mechanical potentiometers and trimmers, providing improved resolution, solid-state reliability, and faster adjustment capabilities.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| End-to-End Terminal Resistance | RAB | 10 kΩ, 50 kΩ, 100 kΩ | Ω | |||
| Resistor Differential Nonlinearity | R-DNL | RWB, A terminal = no connect | −0.5 | ±0.05 | +0.5 | LSB |
| Resistor Integral Nonlinearity | R-INL | RWB, A terminal = no connect | −0.5 | ±0.1 | +0.5 | LSB |
| Nominal Resistor Tolerance | ∆RAB/RAB | −20 | +20 | % | ||
| Resistance Temperature Coefficient | (∆RAB/RAB) × 10^4/∆T | 35 | ppm/°C | |||
| Wiper Resistance | RW | VDD = 2.7 V | 100 | 250 | Ω | |
| Wiper Resistance | RW | VDD = 2.8 V to 5.5 V | 50 | 200 | Ω | |
| Power Supply Range | VDD | 2.7 | 5.5 | V | ||
| Supply Standby Current | IDD_STBY | 0.4 | 3 | μA | ||
| Supply Active Current | IDD_ACT | VDD = 5 V, PU or PD = 0 V | 50 | 110 | μA |
Key Features
- 32-Position Digital Potentiometer: Offers 32 discrete steps for precise control.
- Simple Manual Up/Down Control: Controlled using two external pushbutton tactile switches.
- Built-in Adaptive Debouncer: Ignores invalid bounces due to contact bounce in mechanical switches.
- Autoscan Mode: Changes four resistance steps per second when the PU or PD button is held continuously for more than a second.
- Low Temperature Coefficient: 5 ppm/°C in potentiometer mode and 35 ppm/°C in rheostat mode.
- Ultralow Power Consumption: Typical standby current of 0.4 μA and maximum active current of 110 μA.
- Compact Package: Available in an 8-lead TSOT-23 package.
- Digital Control Compatibility: Compatible with digital control, simplifying microcontroller usage.
Applications
- Mechanical Potentiometer and Trimmer Replacements: Offers improved resolution and solid-state reliability.
- LCD Backlight, Contrast, and Brightness Controls: Suitable for adjusting display settings.
- Digital Volume Control: Used in audio systems for precise volume adjustment.
- Portable Device-Level Adjustments: Ideal for battery-powered devices requiring adjustable settings.
- Electronic Front Panel-Level Controls: Used in various electronic devices for user-adjustable settings.
- Programmable Power Supply: Can be used in power supply applications requiring adjustable voltage or current.
Q & A
- What is the AD5228BUJZ100-RL7 used for?
The AD5228BUJZ100-RL7 is a 32-position digital potentiometer used to replace mechanical potentiometers and trimmers in various applications, offering improved resolution and solid-state reliability.
- What are the key features of the AD5228BUJZ100-RL7?
Key features include a 32-position digital potentiometer, simple manual up/down control, built-in adaptive debouncer, autoscan mode, low temperature coefficient, ultralow power consumption, and digital control compatibility.
- What is the operating temperature range of the AD5228BUJZ100-RL7?
The device operates over an automotive temperature range of −40°C to +105°C.
- How is the AD5228BUJZ100-RL7 controlled?
The device is controlled using two external pushbutton tactile switches for manual up/down control and can also be controlled digitally.
- What is the power consumption of the AD5228BUJZ100-RL7?
The device has a typical standby current of 0.4 μA and a maximum active current of 110 μA.
- What package type is the AD5228BUJZ100-RL7 available in?
The device is available in an 8-lead TSOT-23 package.
- What are some common applications of the AD5228BUJZ100-RL7?
Common applications include mechanical potentiometer and trimmer replacements, LCD backlight and brightness controls, digital volume control, portable device-level adjustments, electronic front panel-level controls, and programmable power supply.
- How does the autoscan mode work on the AD5228BUJZ100-RL7?
When the PU or PD button is held continuously for more than a second, the device activates the autoscan mode, changing four resistance steps per second.
- What is the resistance temperature coefficient of the AD5228BUJZ100-RL7?
The device has a resistance temperature coefficient of 5 ppm/°C in potentiometer mode and 35 ppm/°C in rheostat mode.
- Is the AD5228BUJZ100-RL7 suitable for automotive applications?
Yes, the device is guaranteed to operate over the automotive temperature range and is suitable for automotive applications.
