Overview
The AD8402ARU100, produced by Analog Devices Inc., is a dual-channel digital potentiometer that offers a highly versatile and programmable solution for various electronic adjustment needs. This device is part of the AD8400/AD8402/AD8403 family, which provides single-, dual-, or quad-channel digitally controlled variable resistors. The AD8402 specifically contains two independent variable resistors, each with 256 programmable positions, making it an ideal replacement for mechanical potentiometers or variable resistors.
The device operates within a single-supply voltage range of 2.7 V to 5.5 V, making it suitable for battery-powered applications and other systems requiring low power consumption. It features a 3-wire SPI-compatible serial interface for data input and supports a high update data loading rate of 10 MHz.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Channels | 2 | - |
| Number of Positions | 256 | - |
| Nominal Resistance | 100 kΩ | kΩ |
| Resistance Tolerance | ±1% | % |
| Temperature Coefficient | 500 ppm/°C | ppm/°C |
| Wiper Resistance | 50 Ω (VDD = 5V), 200 Ω (VDD = 3V) | Ω |
| Power Supply Range | 2.7 V to 5.5 V | V |
| Supply Current (CMOS) | 0.01 μA to 5 μA | μA |
| Power Shutdown Current | < 5 μA | μA |
| Operating Temperature Range | −40°C to +125°C | °C |
| Package Type | 14-Lead TSSOP | - |
Key Features
- 256-position digitally controlled variable resistor with two independent channels.
- Available in various nominal resistance values: 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ.
- 3-wire SPI-compatible serial interface for data input.
- High update data loading rate of 10 MHz.
- Single-supply operation from 2.7 V to 5.5 V.
- Low power shutdown current of less than 5 μA.
- Operating temperature range from −40°C to +125°C.
- Compact 14-lead TSSOP package.
Applications
- Mechanical potentiometer replacement.
- Programmable filters, delays, and time constants.
- Volume control and panning in audio systems.
- Line impedance matching.
- Power supply adjustment.
- Battery-powered applications due to low power consumption.
Q & A
- What is the AD8402ARU100 used for?
The AD8402ARU100 is used as a dual-channel digital potentiometer, replacing mechanical potentiometers or variable resistors in various applications.
- What are the available nominal resistance values for the AD8402?
The AD8402 is available in nominal resistance values of 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ.
- What is the operating voltage range of the AD8402ARU100?
The device operates within a single-supply voltage range of 2.7 V to 5.5 V.
- How many programmable positions does each channel of the AD8402 have?
Each channel of the AD8402 has 256 programmable positions.
- What is the temperature coefficient of the AD8402?
The temperature coefficient of the AD8402 is 500 ppm/°C.
- What is the power shutdown current of the AD8402ARU100?
The power shutdown current is less than 5 μA.
- What type of package does the AD8402ARU100 come in?
The AD8402ARU100 comes in a 14-lead TSSOP package.
- What is the operating temperature range of the AD8402ARU100?
The operating temperature range is from −40°C to +125°C.
- Is the AD8402ARU100 suitable for battery-powered applications?
Yes, it is suitable due to its low power consumption and single-supply operation from 2.7 V to 5.5 V.
- What interface does the AD8402 use for data input?
The AD8402 uses a 3-wire SPI-compatible serial interface for data input.
