Overview
The AD5242BRU100, produced by Analog Devices Inc., is a dual-channel, I2C-compatible, 256-position digital potentiometer. This device functions as a digitally controlled variable resistor, offering the same electronic adjustment capabilities as a traditional potentiometer or trimmer. It is designed for applications requiring precise and programmable resistance adjustments.
The AD5242BRU100 operates with a fixed A-to-B terminal resistance of 100 kΩ, with a 1% channel-to-channel matching tolerance. It features an I2C-compatible interface for programming the wiper position and includes two extra programmable logic outputs. The device is available in 16-lead TSSOP and SOIC packages, ensuring compact and reliable solutions for various applications.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Number of Positions | Programmable resistance steps | 256 |
| Terminal Resistance | Fixed resistance between A and B terminals | 100 kΩ |
| Temperature Coefficient | Nominal temperature coefficient | 30 ppm/°C |
| Power Supply | Single-supply or dual-supply operation | 2.7 V to 5.5 V or ±2.7 V |
| Interface | Communication interface | I2C-compatible, 2-wire serial data interface |
| Logic Outputs | Extra programmable logic outputs | 2 |
| Shutdown Feature | Self-contained shutdown capability | Yes |
| Operating Temperature | Extended temperature range | −40°C to +105°C |
| Package | Available packages | 16-lead TSSOP, 16-lead SOIC |
Key Features
- I2C-Compatible Interface: Allows for programming the wiper position via a 2-wire serial data interface.
- Programmable Logic Outputs: Two extra programmable logic outputs to drive digital loads, logic gates, LED drivers, and analog switches.
- Internal Power-On Midscale Preset: Wiper position defaults to midscale at system power-on.
- Self-Contained Shutdown Feature: Active low shutdown capability that connects the wiper to terminal B and opens circuit to terminal A.
- Extended Temperature Range: Guaranteed operation over −40°C to +105°C.
- Compact Packaging: Available in surface-mount 16-lead TSSOP and SOIC packages for ultracompact solutions.
Applications
- Multimedia, Video, and Audio: For gain and volume control.
- Communications: For impedance matching and signal attenuation.
- Mechanical Potentiometer Replacement: Offers digital control and precision over traditional mechanical potentiometers.
- Instrumentation: For gain and offset adjustments in measurement instruments.
- Programmable Voltage-to-Current Conversion: For converting voltage signals to current signals.
- Line Impedance Matching: For matching impedance in various signal transmission lines.
Q & A
- What is the AD5242BRU100 used for?
The AD5242BRU100 is used as a digitally controlled variable resistor, replacing traditional potentiometers or trimmers in various applications.
- What is the resolution of the AD5242BRU100?
The AD5242BRU100 has a resolution of 256 positions.
- What are the available terminal resistances for the AD5242BRU100?
The AD5242BRU100 is available with a fixed terminal resistance of 100 kΩ.
- What is the temperature coefficient of the AD5242BRU100?
The nominal temperature coefficient is 30 ppm/°C.
- What is the operating voltage range of the AD5242BRU100?
The device operates with a single-supply voltage of 2.7 V to 5.5 V or a dual-supply voltage of ±2.7 V.
- Does the AD5242BRU100 have programmable logic outputs?
Yes, it has two extra programmable logic outputs.
- What is the shutdown feature of the AD5242BRU100?
The device has a self-contained shutdown feature that connects the wiper to terminal B and opens the circuit to terminal A.
- What is the operating temperature range of the AD5242BRU100?
The device operates over an extended temperature range of −40°C to +105°C.
- In what packages is the AD5242BRU100 available?
The device is available in 16-lead TSSOP and SOIC packages.
- How is the wiper position programmed in the AD5242BRU100?
The wiper position is programmed via an I2C-compatible, 2-wire serial data interface.
