Overview
The AD5254BRUZ100 from Analog Devices Inc. is a quad-channel, 256-position, I²C, nonvolatile memory digital potentiometer. This device performs the same electronic adjustment functions as mechanical potentiometers, trimmers, and variable resistors. It offers versatile programmability, including read/write access in the RDAC and EEMEM registers, increment/decrement of resistance, and resistance changes in ±6 dB scales. The AD5254BRUZ100 is designed to operate over an extended industrial temperature range of –40°C to +105°C and is available in a 20-lead TSSOP package.
Key Specifications
| Parameter | Value | Notes |
|---|---|---|
| Number of Channels | Quad | |
| Number of Positions | 256 | |
| Interface | I²C | |
| Nominal Resistance | 100 kΩ | |
| Wiper Resistance | 200 Ω (Typ) | |
| Operating Temperature Range | –40°C to +105°C | |
| Supply Voltage Range | 2.7 V to 5.5 V (Single Supply), ±2.25 V to ±2.75 V (Dual Supply) | |
| Temperature Coefficient | 650 ppm/°C (Typ) | |
| Package Type | 20-lead TSSOP | |
| Data Retention | 100 years (Typ) at TA = 55°C | |
| EEMEM Rewrite Time | 540 µs (Typ) | |
| VW Settling Time | 1.5 µs (Typ) |
Key Features
- Quad-channel configuration with 256 positions per channel.
- I²C interface for digital control.
- Nonvolatile memory (EEMEM) for storing wiper settings and user-defined information.
- Increment/decrement of resistance and ±6 dB step changes.
- Wiper setting readback and extra EEMEM for user-defined data.
- Resistance tolerance stored in nonvolatile memory.
- Synchronous or asynchronous quad-channel update.
- Low power consumption with single or dual supply options.
- 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.
- Audio equipment for volume and tone adjustments.
- Consumer electronics for parameter adjustments (e.g., volume, brightness, temperature).
- Motor control circuits for adjusting speed and torque.
- Power management in power adapters and chargers.
Q & A
- What is the AD5254BRUZ100 used for?
The AD5254BRUZ100 is used as a digital potentiometer to replace mechanical potentiometers, trimmers, and variable resistors in various applications.
- How many channels does the AD5254BRUZ100 have?
The AD5254BRUZ100 has four channels, each with 256 positions.
- What interface does the AD5254BRUZ100 use?
The AD5254BRUZ100 uses an I²C interface for digital control.
- What is the operating temperature range of the AD5254BRUZ100?
The operating temperature range is –40°C to +105°C.
- What are the supply voltage options for the AD5254BRUZ100?
The device can operate with a single supply voltage of 2.7 V to 5.5 V or a dual supply voltage of ±2.25 V to ±2.75 V.
- What is the typical data retention time for the AD5254BRUZ100?
The typical data retention time is 100 years at TA = 55°C.
- Can the AD5254BRUZ100 store user-defined information?
Yes, the device has extra EEMEM for storing user-defined information such as memory data for other components, lookup tables, or system identification information.
- What are some common applications of the AD5254BRUZ100?
Common applications include mechanical potentiometer replacement, audio equipment, consumer electronics, motor control, and power management.
- How does the AD5254BRUZ100 handle resistance changes?
The device allows for increment/decrement of resistance and ±6 dB step changes in synchronous or asynchronous channel update mode.
- What is the package type of the AD5254BRUZ100?
The device is packaged in a 20-lead TSSOP.
