Overview
The AD5254BRUZ1-RL7, produced by Analog Devices Inc., is a quad-channel, I2C, nonvolatile memory, digitally controlled potentiometer. This device offers 256 positions and is designed to replace mechanical potentiometers, trimmers, and variable resistors in various applications. It features a versatile programmability that includes read/write access to RDAC and EEMEM registers, increment/decrement of resistance, and resistance changes in ±6 dB scales. The device is available in a 20-Lead TSSOP package and operates over an extended industrial temperature range of –40°C to +105°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Channels | 4 | - |
| Positions per Channel | 256 | - |
| Resistance Options | 1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ | - |
| Operating Temperature | –40°C to +105°C | °C |
| Supply Voltage | 2.7 V to 5.5 V (single supply), ±2.25 V to ±2.75 V (dual supply) | V |
| Interface | I2C-compatible serial interface | - |
| Package | 20-Lead TSSOP | - |
| Power-On Refresh Time | 300 μs (typ) | μs |
| EEMEM Rewrite Time | 540 μs (typ) | μs |
| Data Retention | 100 years (typ) at TA = 55°C | years |
Key Features
- Nonvolatile memory stores 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.
- Resistance tolerance stored in nonvolatile memory for precision applications.
- 12 extra bytes in EEMEM for storing user-defined data such as memory for other components, lookup tables, or system identification information.
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 AD5254BRUZ1-RL7 used for?
The AD5254BRUZ1-RL7 is used as a digitally controlled potentiometer to replace mechanical potentiometers, trimmers, and variable resistors in various applications.
- How many positions does the AD5254BRUZ1-RL7 offer per channel?
The AD5254BRUZ1-RL7 offers 256 positions per channel.
- What are the resistance options available for the AD5254BRUZ1-RL7?
The resistance options available are 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ.
- What is the operating temperature range of the AD5254BRUZ1-RL7?
The operating temperature range is –40°C to +105°C.
- What type of interface does the AD5254BRUZ1-RL7 use?
The device uses an I2C-compatible serial interface.
- How long does it take for the device to refresh its settings at power-on?
The power-on refresh time is typically 300 μs.
- What is the data retention time for the nonvolatile memory?
The data retention time is typically 100 years at TA = 55°C.
- Can the AD5254BRUZ1-RL7 store user-defined information?
- What are some common applications of the AD5254BRUZ1-RL7?
- What package type is the AD5254BRUZ1-RL7 available in?
