Overview
The AD5254BRU1, produced by Analog Devices Inc., is a quad-channel, I2C, nonvolatile memory, digitally controlled potentiometer. This device features 256 positions of resolution, making it highly versatile for various electronic adjustment functions. It operates similarly to mechanical potentiometers, trimmers, and variable resistors but offers the advantages of digital control and nonvolatile memory. The AD5254BRU1 is available in a 20-lead TSSOP package and supports a wide range of resistance values including 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ.
Key Specifications
| Parameter | Value | Notes |
|---|---|---|
| Number of Positions | 256 | |
| Resistance Values | 1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ | |
| Interface | I2C-compatible serial interface | |
| Supply Voltage | Single supply: 2.7 V to 5.5 V, Dual supply: ±2.25 V to ±2.75 V | |
| Operating Temperature | –40°C to +105°C | |
| Package | 20-lead TSSOP | |
| Memory Type | Nonvolatile memory | |
| Power-on Refresh Time | 300 μs (typical) | |
| EEMEM Rewrite Time | 540 μs (typical) | |
| Temperature Coefficient | ±30% (resistance tolerance), 650 ppm/°C (temperature coefficient) |
Key Features
- Quad-channel operation with 256 positions of resolution per channel.
- Nonvolatile memory to store wiper settings with write protection.
- Direct read/write access to RDAC and EEMEM registers.
- Predefined linear increment/decrement commands and ±6 dB step change commands.
- Synchronous or asynchronous quad-channel update mode.
- Wiper setting readback and extra EEMEM for user-defined information.
- 12 extra bytes in EEMEM for storing user-defined data.
- 2 slave address-decoding bits allow operation of up to 4 devices.
- 100-year typical data retention at 55°C.
Applications
- Mechanical potentiometer replacement.
- Low resolution DAC replacement.
- RGB LED backlight control.
- White LED brightness adjustment.
- RF base station power amplifier bias control.
- Programmable gain and offset control.
- Programmable attenuators.
- Programmable voltage-to-current conversion.
- Programmable power supply.
- Programmable filters.
- Sensor calibrations.
Q & A
- What is the resolution of the AD5254BRU1?
The AD5254BRU1 has a resolution of 256 positions per channel.
- What are the available resistance values for the AD5254BRU1?
The available resistance values are 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ.
- What type of interface does the AD5254BRU1 use?
The AD5254BRU1 uses an I2C-compatible serial interface.
- What is the operating temperature range of the AD5254BRU1?
The operating temperature range is –40°C to +105°C.
- How long does it take for the AD5254BRU1 to refresh its settings on power-on?
The power-on refresh time is typically 300 μs.
- What is the EEMEM rewrite time for the AD5254BRU1?
The EEMEM rewrite time is typically 540 μs.
- Can the AD5254BRU1 store user-defined information?
- What are some common applications of the AD5254BRU1?
- Is the AD5254BRU1 compatible with multiple device operation?
- What is the typical data retention time for the AD5254BRU1?
