Overview
The AD5280BRUZ50-REEL7, 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 traditional potentiometer, trimmer, or variable resistor. It is part of the AD5280 series, which offers a completely programmable value of resistance between the A terminal and the wiper or the B terminal and the wiper. The device is available in a 14-lead TSSOP package and operates over an extended industrial temperature range of −40°C to +85°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Fixed Terminal Resistance (RAB) | 20 kΩ, 50 kΩ, 200 kΩ | |
| Number of Positions | 256 | |
| Temperature Coefficient | 30 ppm/°C | |
| Supply Voltage Range | +4.5 V to +16.5 V (single supply), ±4.5 V to ±5.5 V (dual supply) | V |
| Operating Temperature Range | −40°C to +85°C | °C |
| Package Type | 14-Lead TSSOP | |
| Interface | I²C-compatible, 2-wire serial data interface | |
| Power-On Preset | Midscale | |
| Shutdown Current | 5 μA | A |
| Logic Supply Current | 60 μA (at VLOGIC = 5 V) | A |
| Bandwidth (−3 dB) | 310 kHz (RAB = 20 kΩ), 150 kHz (RAB = 50 kΩ), 35 kHz (RAB = 200 kΩ) | kHz |
Key Features
- Programmable Resistance: Offers 256 positions of programmable resistance between the A terminal and the wiper or the B terminal and the wiper.
- Low Temperature Coefficient: 30 ppm/°C, ensuring stable performance over a wide temperature range.
- I²C-Compatible Interface: Uses a 2-wire serial data interface for easy integration into various systems.
- Power-On Preset: Defaults to midscale at system power-on, simplifying fault condition recovery.
- Sleep Mode Programmability: Allows any level of preset at power-up, serving as an alternative to costly EEPROM solutions.
- Programmable Logic Outputs: Enables driving digital loads, logic gates, LED drivers, and analog switches.
- Extended Temperature Range: Operates from −40°C to +85°C, making it suitable for industrial applications.
Applications
- Multimedia, Video, and Audio: Used for volume control, gain adjustment, and other audio/video settings.
- Communications: Employed in communication systems for signal attenuation and impedance matching.
- Mechanical Potentiometer Replacement: Replaces traditional potentiometers with digital control and higher precision.
- Instrumentation: Used for gain and offset adjustments in various measurement instruments.
- Programmable Voltage Source: Can be used to create programmable voltage sources.
- Programmable Current Source: Utilized in applications requiring programmable current sources.
- Line Impedance Matching: Helps in matching line impedances in various electronic systems.
Q & A
- What is the AD5280BRUZ50-REEL7 used for?
The AD5280BRUZ50-REEL7 is a digitally controlled variable resistor used for electronic adjustment functions similar to those of a potentiometer, trimmer, or variable resistor.
- What are the available fixed terminal resistances for the AD5280?
The fixed terminal resistances available are 20 kΩ, 50 kΩ, and 200 kΩ.
- What is the temperature coefficient of the AD5280?
The nominal temperature coefficient is 30 parts per million per degree centigrade (ppm/°C).
- What is the operating temperature range of the AD5280?
The device operates over an extended industrial temperature range of −40°C to +85°C.
- What type of interface does the AD5280 use?
The AD5280 uses an I²C-compatible, 2-wire serial data interface.
- What is the default wiper position at power-on?
The wiper position defaults to midscale at system power-on.
- Can the AD5280 be used in sleep mode?
Yes, the AD5280 features sleep mode programmability, allowing any level of preset at power-up.
- What package type is the AD5280 available in?
The AD5280 is available in a 14-lead TSSOP package.
- What are some common applications of the AD5280?
Common applications include multimedia, video, and audio; communications; mechanical potentiometer replacement; instrumentation; and programmable voltage and current sources.
- What is the bandwidth of the AD5280?
The bandwidth is dependent on the terminal resistance value: 310 kHz (RAB = 20 kΩ), 150 kHz (RAB = 50 kΩ), and 35 kHz (RAB = 200 kΩ).
