Overview
The AD8402AN100, produced by Analog Devices Inc., is a dual-channel, 256-position digitally controlled variable resistor (VR) device. This component is designed to replace mechanical potentiometers and variable resistors, offering a highly programmable and precise electronic adjustment solution. It is part of the AD8400/AD8402/AD8403 family, which includes single, dual, and quad-channel configurations. The AD8402 specifically contains two independent variable resistors, making it ideal for applications requiring multiple adjustable resistance settings.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices Inc. |
| Category | Integrated Circuits (ICs) - Data Acquisition - Digital Potentiometers |
| Package | 14-PDIP (0.300", 7.62mm), 14-TSSOP, 14-SOIC |
| Configuration | Potentiometer |
| Number of Circuits | 2 |
| Number of Taps | 256 |
| Resistance (Ohms) | 100 kΩ |
| Interface | 3-Wire SPI-Compatible Serial |
| Memory Type | Volatile |
| Voltage - Supply | 2.7 V ~ 5.5 V |
| Resistance Tolerance | ±20% |
| Temperature Coefficient (Typ) | 500 ppm/°C |
| Resistance - Wiper (Ohms) (Typ) | 200 |
| Operating Temperature | -40°C ~ 125°C |
Key Features
- 256-position digitally controlled variable resistor, allowing for precise and programmable resistance settings.
- Two independent variable resistors, enabling multiple adjustable resistance settings in a single package.
- 3-Wire SPI-Compatible Serial interface for easy communication and control.
- Single-supply operation from 2.7 V to 5.5 V, making it versatile for various applications.
- Power shutdown feature with less than 5 µA current draw, ideal for power-sensitive designs.
- Midscale preset and reset functionality through the RS pin.
- High channel-to-channel matching tolerance of ±1% and a nominal temperature coefficient of 500 ppm/°C.
Applications
- Mechanical potentiometer replacement in various electronic circuits.
- Programmable filters, delays, and time constants in signal processing applications.
- Volume control and panning in audio systems.
- Line impedance matching and power supply adjustment in power management systems.
- Automotive applications due to its qualified and reliable performance.
Q & A
- What is the AD8402AN100 used for?
The AD8402AN100 is used as a dual-channel, 256-position digitally controlled variable resistor, replacing mechanical potentiometers and variable resistors in various electronic applications.
- What are the key features of the AD8402AN100?
Key features include 256-position programmable resistance, 3-Wire SPI-Compatible Serial interface, single-supply operation from 2.7 V to 5.5 V, power shutdown, and high channel-to-channel matching tolerance.
- What is the operating voltage range of the AD8402AN100?
The operating voltage range is from 2.7 V to 5.5 V.
- What is the resistance range of the AD8402AN100?
The fixed A-to-B terminal resistance is 100 kΩ, with a ±20% tolerance.
- What is the temperature coefficient of the AD8402AN100?
The nominal temperature coefficient is 500 ppm/°C.
- Can the AD8402AN100 be used in automotive applications?
- How many independent variable resistors does the AD8402AN100 contain?
The AD8402AN100 contains two independent variable resistors.
- What is the power shutdown current of the AD8402AN100?
The power shutdown current is less than 5 µA.
- What interface does the AD8402AN100 use for communication?
The AD8402AN100 uses a 3-Wire SPI-Compatible Serial interface.
- What is the operating temperature range of the AD8402AN100?
The operating temperature range is from -40°C to 125°C.
- Does the AD8402AN100 have a midscale preset feature?
