Overview
The AD8400AR1-REEL, produced by Analog Devices Inc., is a digitally controlled variable resistor that functions as a digital potentiometer. This device is part of the AD8400 series, which includes single, dual, and quad-channel configurations. The AD8400AR1-REEL specifically features a single-channel, 256-position digital potentiometer. It is designed to replace mechanical potentiometers and variable resistors in various applications, offering precise and programmable resistance adjustments.
This component is housed in an 8-lead SOIC package and operates on a single supply voltage between 2.7 V and 5.5 V, making it suitable for battery-powered and other low-voltage applications. The device is controlled via a 3-wire SPI-compatible serial interface, allowing for easy integration with digital systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Circuits | 1 | |
| Number of Taps | 256 | |
| Resistance (Ohms) | 1 kΩ | Ω |
| Interface | SPI | |
| Voltage Supply | 2.7 V to 5.5 V | V |
| Operating Temperature | -40°C to 125°C | °C |
| Temperature Coefficient | 500 ppm/°C | ppm/°C |
| Wiper Resistance | Typically 200 Ω | Ω |
| Power Shutdown Current | < 5 μA | μA |
| Update Data Loading Rate | 10 MHz | MHz |
Key Features
- Precise Adjustment: 256-position linear taper for high-resolution adjustments.
- Digital Control: SPI-compatible serial interface for easy integration with microcontrollers and digital systems.
- Low Power Operation: Single-supply operation between 2.7 V and 5.5 V, with a power shutdown current of less than 5 μA.
- Reliable Performance: Operating temperature range of -40°C to 125°C and a temperature coefficient of 500 ppm/°C.
- Compact Packaging: Available in an 8-lead SOIC package, suitable for surface mount technology (SMT) assembly processes.
- Glitch-Free Operation: Unique switching circuit minimizes high glitches, avoiding make-before-break or break-before-make operations.
Applications
- Mechanical Potentiometer Replacement: Replaces traditional mechanical potentiometers and variable resistors.
- Programmable Filters, Delays, Time Constants: Used in applications requiring adjustable filter characteristics and time constants.
- Volume Control, Panning: Suitable for audio applications where precise volume and panning control are necessary.
- Line Impedance Matching: Used for matching impedance in various electronic circuits.
- Power Supply Adjustment: Adjusts power supply settings in electronic systems.
- Industrial Control Systems, Automotive Electronics, Consumer Electronics, Communication Systems: Versatile enough to be used in a wide range of industries and applications.
Q & A
- What is the AD8400AR1-REEL used for?
The AD8400AR1-REEL is a digitally controlled variable resistor used to replace mechanical potentiometers and variable resistors in various applications.
- What is the operating voltage range of the AD8400AR1-REEL?
The operating voltage range is between 2.7 V and 5.5 V.
- What interface does the AD8400AR1-REEL use for digital control?
The device uses a 3-wire SPI-compatible serial interface.
- How many positions does the AD8400AR1-REEL have?
The device has 256 positions.
- What is the typical wiper resistance of the AD8400AR1-REEL?
The typical wiper resistance is 200 Ω.
- What is the temperature coefficient of the AD8400AR1-REEL?
The temperature coefficient is 500 ppm/°C.
- How does the AD8400AR1-REEL handle power shutdown?
The device has a power shutdown current of less than 5 μA and can be shut down using the SHDN pin.
- What is the update data loading rate of the AD8400AR1-REEL?
The update data loading rate is 10 MHz.
- What are some common applications of the AD8400AR1-REEL?
Common applications include mechanical potentiometer replacement, programmable filters, volume control, line impedance matching, and power supply adjustment.
- What package type is the AD8400AR1-REEL available in?
The device is available in an 8-lead SOIC package.
