Overview
The AD5254BRU1-RL7, produced by Analog Devices Inc., is a quad-channel, I2C, nonvolatile memory, digitally controlled potentiometer. This device offers 256 positions of resolution and is designed to perform the same electronic adjustment functions as mechanical potentiometers, trimmers, and variable resistors. 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 |
|---|---|---|
| Resolution | 256 positions | |
| Resistance Options | 1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ | |
| Supply Voltage | 2.7 V to 5.5 V, ±2.25 V to ±2.75 V | V |
| Operating Temperature | –40°C to +105°C | °C |
| Package Type | 20-Lead TSSOP | |
| I2C Compatibility | I2C-compatible serial interface | |
| Nonvolatile Memory | Stores wiper settings with write protection | |
| Power-On Refresh Time | 300 μs (typical) | μs |
| EEMEM Rewrite Time | 540 μs (typical) | μs |
| Resistance Tolerance | Stored in nonvolatile memory | |
| Extra EEMEM | 12 extra bytes for user-defined information | |
| Temperature Coefficient | 650 ppm/°C (typical) | ppm/°C |
| Data Retention | 100 years (typical at 55°C) | years |
Key Features
- Quad-channel digitally controlled potentiometer with 256 positions.
- Nonvolatile memory to store wiper settings with write protection.
- I2C-compatible serial interface with 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 capability.
- Wiper setting readback and extra EEMEM for user-defined information.
- Single supply operation from 2.7 V to 5.5 V and dual supply operation from ±2.25 V to ±2.75 V.
- High temperature stability with an operating range of –40°C to +105°C.
- Patented resistance-tolerance storing function for precision applications.
Applications
- AUDIO: Audio volume control, tone control, and other audio adjustments.
- LIGHTING: White LED brightness control.
- INDUSTRIAL CONTROL: Adjustment of various parameters in industrial control systems.
- AUTOMOTIVE: Electronic adjustments in automotive systems.
- CONSUMER ELECTRONICS: Volume, tone, and other parameter adjustments in consumer electronics.
Q & A
- What is the resolution of the AD5254BRU1-RL7?
The AD5254BRU1-RL7 has a resolution of 256 positions.
- What are the available resistance options for the AD5254BRU1-RL7?
The available resistance options are 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ.
- What is the operating temperature range of the AD5254BRU1-RL7?
The operating temperature range is –40°C to +105°C.
- What type of interface does the AD5254BRU1-RL7 use?
The device uses an I2C-compatible serial interface.
- How long does it take for the device to refresh its settings on power-on?
The power-on refresh time is typically 300 μs.
- What is the purpose of the extra EEMEM in the AD5254BRU1-RL7?
The extra EEMEM is for storing user-defined information such as memory data for other components, lookup tables, or system identification information.
- What is the temperature coefficient of the AD5254BRU1-RL7?
The temperature coefficient is typically 650 ppm/°C.
- How long does the nonvolatile memory retain data?
The nonvolatile memory retains data for typically 100 years at 55°C.
- What package type is the AD5254BRU1-RL7 available in?
The device is available in a 20-Lead TSSOP package.
- Can the AD5254BRU1-RL7 be used in synchronous or asynchronous mode?
Yes, the device can operate in both synchronous and asynchronous quad-channel update modes.
