Overview
The AD5254BRUZ10-RL7, produced by Analog Devices Inc., is a quad-channel, I2C, nonvolatile memory, digitally controlled potentiometer. This device features 256 positions and is designed to perform the same electronic adjustment functions as mechanical potentiometers, trimmers, and variable resistors. It offers versatile programmability, including read/write access to RDAC and EEMEM registers, increment/decrement of resistance, and resistance changes in ±6 dB scales. The AD5254 is suitable for a wide range of applications due to its single-supply (2.7 V to 5.5 V) and dual-supply (±2.25 V to ±2.75 V) operation capabilities.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Channels | 4 | - |
| Resolution | 256 positions | - |
| Resistance Values | 1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ | Ω |
| Supply Voltage (Single) | 2.7 V to 5.5 V | V |
| Supply Voltage (Dual) | ±2.25 V to ±2.75 V | V |
| Operating Temperature | –40°C to +105°C | °C |
| I2C Interface Speed | Up to 400 kbps | kbps |
| Package Type | 20-Lead TSSOP | - |
| Data Retention | 100 years (typical at 55°C) | years |
Key Features
- Quad-channel, I2C, nonvolatile memory, digitally controlled potentiometers with 256 positions.
- Nonvolatile memory stores wiper settings with write protection.
- Power-on refresh to EEMEM settings in 300 μs (typical).
- EEMEM rewrite time of 540 μs (typical).
- Resistance tolerance stored in nonvolatile memory.
- 12 extra bytes in EEMEM for user-defined information.
- I2C-compatible serial interface with fast mode operation up to 400 kbps.
- Direct read/write access of RDAC and EEMEM registers.
- Predefined linear increment/decrement commands and ±6 dB step change commands.
- Synchronous or asynchronous quad-channel update.
- Wiper setting readback.
Applications
- Mechanical potentiometer replacement.
- Low resolution DAC replacement.
- RGB LED backlight control.
- White LED brightness adjustment.
- RF base station power amp 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 AD5254BRUZ10-RL7?
The AD5254BRUZ10-RL7 has a resolution of 256 positions.
- What are the available resistance values for the AD5254?
The available resistance values are 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ.
- What is the operating temperature range of the AD5254?
The operating temperature range is –40°C to +105°C.
- What type of interface does the AD5254 use?
The AD5254 uses an I2C-compatible serial interface.
- What is the data retention time of the AD5254?
The data retention time is typically 100 years at 55°C.
- Can the AD5254 be used in battery-powered applications?
- What is the purpose of the extra EEMEM bytes in the AD5254?
The extra 12 bytes in EEMEM can be used for storing user-defined information, such as memory data for other components, lookup tables, or system identification information.
- How does the AD5254 handle power-on settings?
The AD5254 restores the wiper settings from EEMEM to the RDAC registers automatically at system power-on.
- What are some common applications of the AD5254?
Common applications include mechanical potentiometer replacement, RGB LED backlight control, white LED brightness adjustment, and RF base station power amp bias control.
- What package type is the AD5254BRUZ10-RL7 available in?
The AD5254BRUZ10-RL7 is available in a 20-Lead TSSOP package.
