Overview
The AD5254BRUZ1, manufactured by Analog Devices Inc., is a quad-channel, I2C, nonvolatile memory, digitally controlled potentiometer. This device features 256-position resolution and is designed to perform the same electronic adjustment functions as mechanical potentiometers, trimmers, and variable resistors. It is part of the AD5253/AD5254 series, which offers versatile programmability and multiple modes of operation.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 256 positions | |
| Resistance Options | 1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ | |
| Nonvolatile Memory | Stores wiper settings with write protection | |
| Power-on Refresh Time | 300 μs (typical) | μs |
| EEMEM Rewrite Time | 540 μs (typical) | μs |
| 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 | V |
| Operating Temperature | –40°C to +105°C | °C |
| Package | 20-Lead TSSOP | |
| Data Retention | 100 years (typical at 55°C) | years |
Key Features
- Quad-channel operation with 256-position resolution per channel.
- Nonvolatile memory to store wiper settings with write protection.
- I2C-compatible serial interface for 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 capability.
- Wiper setting readback feature.
- Resistance tolerance stored in nonvolatile memory for precision applications.
- 12 extra bytes in EEMEM for user-defined information.
- High bandwidth: 4 MHz for the 1 kΩ version.
- Two slave address-decoding bits allow operation of up to 4 devices.
Applications
- Audio volume control and other nonlinear adjustments.
- White LED brightness control.
- Industrial control systems requiring precise and stable resistance settings.
- Automotive and aerospace applications due to its extended industrial temperature range.
- Medical devices and equipment that require nonvolatile memory and precise resistance control.
Q & A
- What is the resolution of the AD5254BRUZ1?
The AD5254BRUZ1 has a resolution of 256 positions per channel.
- What are the available resistance options for the AD5254BRUZ1?
The available resistance options are 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ.
- How does the AD5254BRUZ1 store its settings?
The device stores its wiper settings in nonvolatile memory (EEMEM) with write protection.
- What is the power-on refresh time for the AD5254BRUZ1?
The power-on refresh time is typically 300 μs.
- What interface does the AD5254BRUZ1 use for communication?
The device uses an I2C-compatible serial interface.
- What is the operating temperature range of the AD5254BRUZ1?
The operating temperature range is –40°C to +105°C.
- How many devices can be operated using the AD5254BRUZ1's slave address-decoding bits?
Up to 4 devices can be operated using the two slave address-decoding bits.
- What is the data retention time for the AD5254BRUZ1's nonvolatile memory?
The data retention time is typically 100 years at 55°C.
- What are some common applications of the AD5254BRUZ1?
Common applications include audio volume control, white LED brightness control, industrial control systems, automotive and aerospace applications, and medical devices.
- What package type is the AD5254BRUZ1 available in?
The device is available in a 20-Lead TSSOP package.
