Overview
The AD5254BRUZ50, produced by Analog Devices Inc., is a quad-channel, I2C, nonvolatile memory, digitally controlled potentiometer. This device features 256-position resolution and is part of the AD5254 series, which performs the same electronic adjustment functions as mechanical potentiometers, trimmers, and variable resistors. It is available in a TSSOP-20 package and operates over an extended industrial temperature range of –40°C to +105°C.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 256 positions |
| Resistance Options | 1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ (this model: 50 kΩ) |
| Nonvolatile Memory | Stores wiper settings with write protection |
| Power-On Refresh Time | 300 μs typical |
| EEMEM Rewrite Time | 540 μs typical |
| Serial Interface | I2C-compatible |
| 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 |
| Data Retention | 100 years typical at T = 55°C |
| Package | TSSOP-20 |
Key Features
- Versatile programmability with read/write access in RDAC and EEMEM registers.
- Increment/decrement of resistance and resistance changes in ±6 dB scales.
- Wiper setting readback and extra EEMEM for storing user-defined information.
- Patented resistance-tolerance storing function for precision applications.
- Synchronous or asynchronous quad-channel update mode.
- Direct read/write access of RDAC and EEMEM registers.
- Predefined linear increment/decrement commands and ±6 dB step change commands.
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 AD5254BRUZ50?
The AD5254BRUZ50 has a resolution of 256 positions. - What are the available resistance options for the AD5254 series?
The AD5254 series is available in 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ options. This specific model is 50 kΩ. - How does the nonvolatile memory function in the AD5254BRUZ50?
The nonvolatile memory stores wiper settings with write protection and restores them automatically at system power-on. - What is the typical power-on refresh time for the AD5254BRUZ50?
The typical power-on refresh time is 300 μs. - What is the EEMEM rewrite time for the AD5254BRUZ50?
The EEMEM rewrite time is 540 μs typical. - What type of serial interface does the AD5254BRUZ50 use?
The AD5254BRUZ50 uses an I2C-compatible serial interface. - What is the operating temperature range for the AD5254BRUZ50?
The operating temperature range is –40°C to +105°C. - How long does the data retention last for the AD5254BRUZ50?
The data retention is typically 100 years at T = 55°C. - In what package is the AD5254BRUZ50 available?
The AD5254BRUZ50 is available in a TSSOP-20 package. - What are some of the key applications of the AD5254BRUZ50?
Key applications include mechanical potentiometer replacement, low resolution DAC replacement, RGB LED backlight control, and more.
