Overview
The AD5242BRZ100-REEL7 is a dual-channel, 256-position, digitally controlled variable resistor (VR) device produced by Analog Devices Inc. This component functions as a digital potentiometer, trimmer, or variable resistor, offering a completely programmable value of resistance between the A terminal and the wiper, or the B terminal and the wiper. It is designed for applications requiring precise electronic adjustments and features an I2C-compatible, 2-wire serial data interface for programming the VR wiper position.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Positions | 256 | - |
| Fixed A-to-B Terminal Resistance | 100 kΩ | Ω |
| Temperature Coefficient | 30 ppm/°C | ppm/°C |
| Supply Voltage | 2.7 V to 5.5 V (single-supply) or ±2.7 V (dual-supply) | V |
| Operating Temperature Range | −40°C to +105°C | °C |
| Package Type | 16-Lead SOIC | - |
| Differential Nonlinearity | ±0.4 LSB | LSB |
| Integral Nonlinearity | ±0.5 LSB | LSB |
| Wiper Resistance | 60 Ω | Ω |
Key Features
- I2C-compatible, 2-wire serial data interface with readback capability
- Internal power on midscale preset
- Extra programmable logic outputs for driving digital loads, logic gates, LED drivers, and analog switches
- Self-contained shutdown feature
- Extended temperature range: −40°C to +105°C
- Low temperature coefficient: 30 ppm/°C
Applications
- Multimedia, video, and audio
- Communications
- Mechanical potentiometer replacement
- Instrumentation: gain, offset adjustment
- Programmable voltage-to-current conversion
- Line impedance matching
Q & A
- What is the AD5242BRZ100-REEL7 used for?
The AD5242BRZ100-REEL7 is used as a digital potentiometer, trimmer, or variable resistor in various applications requiring precise electronic adjustments.
- What is the resolution of the AD5242BRZ100-REEL7?
The resolution is 256 positions, which is equivalent to 8 bits.
- What are the available fixed A-to-B terminal resistances for the AD5242?
The fixed A-to-B terminal resistances are 10 kΩ, 100 kΩ, and 1 MΩ.
- What is the temperature coefficient of the AD5242BRZ100-REEL7?
The temperature coefficient is 30 ppm/°C.
- What is the operating temperature range of the AD5242BRZ100-REEL7?
The operating temperature range is −40°C to +105°C.
- What type of interface does the AD5242BRZ100-REEL7 use for programming?
The device uses an I2C-compatible, 2-wire serial data interface.
- Does the AD5242BRZ100-REEL7 have any additional programmable outputs?
Yes, it has two extra programmable logic outputs available.
- What is the package type of the AD5242BRZ100-REEL7?
The package type is 16-Lead SOIC.
- What are some common applications of the AD5242BRZ100-REEL7?
Common applications include multimedia, video and audio, communications, mechanical potentiometer replacement, instrumentation, programmable voltage-to-current conversion, and line impedance matching.
- How does the wiper position default at system power on?
The wiper position defaults to midscale at system power on.
