Overview
The AD8403AR1-REEL, produced by Analog Devices Inc., is a quad-channel, 256-position digitally controlled variable resistor (VR) device. This component is part of the AD8400/AD8402/AD8403 series and serves as a digital replacement for mechanical potentiometers or variable resistors. It is available in 24-lead PDIP, SOIC, and TSSOP packages, making it versatile for various applications. Each channel contains a fixed resistor with a wiper contact that can be programmed via a 3-wire SPI-compatible serial data input, allowing for precise control over the resistance value.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Channels | 4 | - |
| Number of Positions | 256 | - |
| Resistor Values | 1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ | - |
| Supply Voltage | 2.7 V to 5.5 V | V |
| Update Data Loading Rate | 10 MHz | Hz |
| Power Shutdown Current | < 5 μA | A |
| Operating Temperature Range | −40°C to +125°C | °C |
| Wiper Resistance (VDD = 5V) | 50 - 100 Ω | Ω |
| Wiper Resistance (VDD = 3V) | 200 Ω | Ω |
| Nominal Resistance Match | ±1% | % |
| Resistance Temperature Coefficient | 500 ppm/°C | ppm/°C |
Key Features
- Quad-channel, 256-position digitally controlled variable resistor.
- Available in 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ resistor values.
- 3-wire SPI-compatible serial data input for easy programming.
- 10 MHz update data loading rate for fast adjustments.
- Single-supply operation from 2.7 V to 5.5 V.
- Low power shutdown current of less than 5 μA.
- Operating temperature range of −40°C to +125°C, suitable for industrial and automotive applications.
- Midscale preset capability.
- Compact packaging options including 24-lead PDIP, SOIC, and TSSOP.
Applications
- Mechanical potentiometer replacement.
- Programmable filters, delays, and time constants.
- Volume control and panning in audio systems.
- Line impedance matching.
- Power supply adjustment.
- Automotive applications due to its extended temperature range and reliability.
Q & A
- What is the AD8403AR1-REEL used for?
The AD8403AR1-REEL is used as a digital replacement for mechanical potentiometers or variable resistors, offering precise control over resistance values in various applications.
- How many channels does the AD8403AR1-REEL have?
The AD8403AR1-REEL has four independent channels.
- What are the available resistor values for the AD8403AR1-REEL?
The available resistor values are 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ.
- What is the supply voltage range for the AD8403AR1-REEL?
The supply voltage range is from 2.7 V to 5.5 V.
- How is the AD8403AR1-REEL programmed?
The AD8403AR1-REEL is programmed via a 3-wire SPI-compatible serial data input.
- What is the update data loading rate of the AD8403AR1-REEL?
The update data loading rate is 10 MHz.
- What is the power shutdown current of the AD8403AR1-REEL?
The power shutdown current is less than 5 μA.
- What is the operating temperature range of the AD8403AR1-REEL?
The operating temperature range is from −40°C to +125°C.
- What are some common applications of the AD8403AR1-REEL?
Common applications include mechanical potentiometer replacement, programmable filters, volume control, line impedance matching, and power supply adjustment.
- Is the AD8403AR1-REEL suitable for automotive applications?
Yes, it is suitable for automotive applications due to its extended temperature range and reliability.
