Overview
The AD5242BR100, produced by Analog Devices Inc., is a dual-channel, 256-position, digitally controlled variable resistor (VR) device. This component functions as a digital potentiometer, trimmer, or variable resistor, offering a completely programmable resistance value between the A terminal and the wiper, or the B terminal and the wiper. It is designed to operate with a fixed A-to-B terminal resistance of 100 kΩ, with a 1% channel-to-channel matching tolerance. The device is controlled via an I2C-compatible serial bus and features an extended temperature range of −40°C to +105°C.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Positions | 256 |
| Resistance (Ohms) | 100 kΩ |
| Temperature Coefficient (Typ) | 30 ppm/°C |
| Voltage Supply | 2.7 V to 5.5 V, ±2.3 V to ±2.7 V |
| Interface | I2C-compatible, 2-wire serial data interface |
| Operating Temperature | −40°C to +105°C |
| Package | 16-Lead SOIC, 16-Lead TSSOP |
| Memory Type | Volatile |
| Logic Outputs | Two extra programmable logic outputs |
Key Features
- Single-supply operation from 2.7 V to 5.5 V or dual-supply operation from ±2.3 V to ±2.7 V.
- Internal power-on midscale preset and self-contained shutdown feature.
- I2C-compatible interface with readback capability.
- Two extra programmable logic outputs for driving digital loads, logic gates, LED drivers, and analog switches.
- Extended temperature range: −40°C to +105°C.
- Low temperature coefficient: 30 ppm/°C.
Applications
- Multimedia, video, and audio systems.
- Communications equipment.
- Mechanical potentiometer replacement.
- Instrumentation: gain and offset adjustment.
- Programmable voltage-to-current conversion.
- Line impedance matching.
Q & A
- What is the AD5242BR100 used for?
The AD5242BR100 is used as a digital potentiometer, trimmer, or variable resistor in various applications such as multimedia, communications, instrumentation, and mechanical potentiometer replacement.
- What is the resistance range of the AD5242BR100?
The AD5242BR100 has a fixed A-to-B terminal resistance of 100 kΩ.
- What interface does the AD5242BR100 use?
The AD5242BR100 uses an I2C-compatible, 2-wire serial data interface.
- What is the operating temperature range of the AD5242BR100?
The operating temperature range is −40°C to +105°C.
- Does the AD5242BR100 have programmable logic outputs?
Yes, it has two extra programmable logic outputs.
- What is the temperature coefficient of the AD5242BR100?
The nominal temperature coefficient is 30 ppm/°C.
- What are the package options for the AD5242BR100?
The device is available in 16-Lead SOIC and 16-Lead TSSOP packages.
- Is the AD5242BR100 suitable for high-temperature environments?
Yes, it is designed to operate over an extended temperature range of −40°C to +105°C.
- Can multiple AD5242BR100 devices be used on the same I2C bus?
Yes, up to four devices can be used on the same bus due to programmable address bits (AD0 and AD1).
- What is the power-on default state of the wiper position?
The wiper position defaults to midscale at system power-on.
