Overview
The AD5280BRUZ50, produced by Analog Devices Inc., is a single-channel, 256-position, digitally controlled variable resistor (VR). This device performs the same electronic adjustment function as a potentiometer, trimmer, or variable resistor, offering enhanced resolution, solid-state reliability, and superior temperature stability. It is part of the AD5280/AD5282 series, which includes both single-channel and dual-channel configurations.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Positions | 256 | |
| Terminal Resistance | 50 kΩ | |
| Temperature Coefficient | 30 ppm/°C | |
| Operating Voltage | +15 V or ±5 V | |
| Operating Temperature Range | −40°C to +85°C | |
| Interface | I2C-compatible, 2-wire serial data interface | |
| Package Type | 14-Lead TSSOP | |
| Power Dissipation | 0.2 to 0.3 mW | |
| Bandwidth (−3 dB) | 150 kHz (for 50 kΩ) | |
| Total Harmonic Distortion (THD) | 0.014 % |
Key Features
- Completely programmable resistance between the A terminal and the wiper or the B terminal and the wiper.
- Programmable logic outputs to drive digital loads, logic gates, LED drivers, and analog switches.
- Wiper position defaults to midscale at system power-on and can be programmed via an I2C-compatible interface.
- Sleep mode programmability, offering an alternative to costly EEPROM solutions.
- Compact 14-lead TSSOP package.
- Extended industrial temperature range operation.
Applications
- Multimedia, video, and audio systems.
- Communications equipment.
- Mechanical potentiometer replacement.
- Instrumentation: gain and offset adjustment.
- Programmable voltage and current sources.
- Line impedance matching.
Q & A
- What is the AD5280BRUZ50 used for?
The AD5280BRUZ50 is used as a digitally controlled variable resistor, performing the same electronic adjustment function as a potentiometer, trimmer, or variable resistor.
- What are the available terminal resistances for the AD5280BRUZ50?
The AD5280BRUZ50 is available with terminal resistances of 20 kΩ, 50 kΩ, or 200 kΩ, with the specific model AD5280BRUZ50 having a 50 kΩ resistance.
- What is the temperature coefficient of the AD5280BRUZ50?
The nominal temperature coefficient of the AD5280BRUZ50 is 30 parts per million per degrees centigrade (ppm/°C).
- What interface does the AD5280BRUZ50 use for programming?
The AD5280BRUZ50 uses an I2C-compatible, 2-wire serial data interface for programming.
- What is the operating temperature range of the AD5280BRUZ50?
The AD5280BRUZ50 operates over an extended industrial temperature range of −40°C to +85°C.
- What package type is the AD5280BRUZ50 available in?
The AD5280BRUZ50 is available in a 14-lead TSSOP package.
- Does the AD5280BRUZ50 have programmable logic outputs?
Yes, the AD5280BRUZ50 has programmable logic outputs that can drive digital loads, logic gates, LED drivers, and analog switches.
- What is the default wiper position at system power-on?
The wiper position defaults to midscale at system power-on.
- Can the AD5280BRUZ50 operate in sleep mode?
Yes, the AD5280BRUZ50 features sleep mode programmability, which allows any level of preset in power-up and is an alternative to a costly EEPROM solution.
- What are some common applications of the AD5280BRUZ50?
Common applications include multimedia, video, and audio systems, communications equipment, mechanical potentiometer replacement, instrumentation, and programmable voltage and current sources.
