Overview
The AD5254BRUZ100-RL7, produced by Analog Devices Inc., is a quad-channel, I2C, nonvolatile memory, digitally controlled potentiometer. This device is part of the AD5253/AD5254 series, offering 256-position resolution. It functions as an electronic replacement for mechanical potentiometers, trimmers, and variable resistors, providing versatile programmability and multiple modes of operation. The AD5254 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 | |
| Resistor Values | 1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ | |
| Operating Temperature | –40°C to +105°C | |
| Supply Voltage | Single: 2.7 V to 5.5 V, Dual: ±2.25 V to ±2.75 V | V |
| Interface | I2C-compatible serial interface | |
| Nonvolatile Memory | Stores wiper settings and user-defined information | |
| Power-On Refresh Time | 300 μs (typical) | μs |
| EEMEM Rewrite Time | 540 μs (typical) | μs |
| Resistance Tolerance | ±20% | % |
| Wiper Resistance | 75 Ω to 130 Ω (VDD = 5 V), 200 Ω to 300 Ω (VDD = 3 V) | Ω |
Key Features
- Quad-channel configuration with 256-position resolution per channel
- Nonvolatile memory for storing wiper settings and user-defined information
- I2C-compatible serial interface for read/write access to RDAC and EEMEM registers
- Increment, decrement, and ±6 dB step change commands in synchronous or asynchronous mode
- Wiper setting readback and extra EEMEM for user-defined data
- Resistance tolerance stored in nonvolatile memory for precision applications
- Operating in single or dual supply modes
- Extended industrial temperature range operation
Applications
- Mechanical potentiometer replacement
- Low resolution DAC replacement
- RGB LED backlight control and white LED brightness adjustment
- RF base station power amp bias control
- Programmable gain and offset control
- Programmable attenuators and voltage-to-current conversion
- Programmable power supply and filters
- Sensor calibrations
Q & A
- What is the resolution of the AD5254BRUZ100-RL7? The AD5254BRUZ100-RL7 has a resolution of 256 positions per channel.
- What are the available resistor values for this device? The available resistor values are 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ.
- What is the operating temperature range of the AD5254BRUZ100-RL7? The operating temperature range is –40°C to +105°C.
- What type of interface does the AD5254BRUZ100-RL7 use? The device uses an I2C-compatible serial interface.
- Does the AD5254BRUZ100-RL7 have nonvolatile memory? Yes, it has nonvolatile memory to store wiper settings and user-defined information.
- 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 are some common applications of the AD5254BRUZ100-RL7? Common applications include mechanical potentiometer replacement, RGB LED backlight control, RF base station power amp bias control, and sensor calibrations.
- Can the AD5254BRUZ100-RL7 operate in dual supply mode? Yes, it can operate in both single and dual supply modes.
- What is the wiper resistance of the AD5254BRUZ100-RL7? The wiper resistance ranges from 75 Ω to 130 Ω (VDD = 5 V) and 200 Ω to 300 Ω (VDD = 3 V).
- How many bytes of extra EEMEM are available for user-defined information? There are 12 extra bytes in EEMEM for user-defined information.
