Overview
The AD8403ARUZ100, manufactured 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, which replaces traditional mechanical potentiometers or variable resistors with a digital alternative. The AD8403 specifically contains four independent variable resistors, each offering a completely programmable value of resistance between the A terminal and the wiper or the B terminal and the wiper. It is available in 24-lead PDIP, SOIC, and TSSOP packages, making it versatile for various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Channels | 4 | - |
| Number of Positions | 256 | - |
| Resistor Values | 1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ | Ω |
| Package Type | 24-Lead TSSOP, PDIP, SOIC | - |
| Operating Temperature Range | −40°C to +125°C | °C |
| Supply Voltage | 2.7 V to 5.5 V | V |
| Max Supply Current | 900 µA | µA |
| Power Shutdown Current | < 5 µA | µA |
| Interface | 3-Wire SPI-Compatible Serial Data Input | - |
| Update Data Loading Rate | 10 MHz | MHz |
| Resistance Tempco | 500 ppm/°C | ppm/°C |
| Wiper Resistance | 50 Ω (VDD = 5V), 200 Ω (VDD = 3V) | Ω |
Key Features
- Replaces 1, 2, or 4 mechanical potentiometers with digital control.
- 256-position digitally controlled variable resistor.
- Available in 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ resistor values.
- Power shutdown mode with less than 5 µA current draw.
- 3-wire SPI-compatible serial data input interface.
- High update data loading rate of 10 MHz.
- Single-supply operation from 2.7 V to 5.5 V.
- Guaranteed operation over the extended industrial temperature range of −40°C to +125°C.
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 robust design.
Q & A
- What is the AD8403ARUZ100 used for?
The AD8403ARUZ100 is used as a digitally controlled variable resistor, replacing traditional mechanical potentiometers in various applications.
- How many channels does the AD8403ARUZ100 have?
The AD8403ARUZ100 has four independent channels.
- What are the available resistor values for the AD8403ARUZ100?
The available resistor values are 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ.
- What is the operating temperature range of the AD8403ARUZ100?
The operating temperature range is −40°C to +125°C.
- What is the supply voltage range for the AD8403ARUZ100?
The supply voltage range is from 2.7 V to 5.5 V.
- What is the maximum supply current of the AD8403ARUZ100?
The maximum supply current is 900 µA.
- What interface does the AD8403ARUZ100 use for data input?
The AD8403ARUZ100 uses a 3-wire SPI-compatible serial data input interface.
- What is the update data loading rate of the AD8403ARUZ100?
The update data loading rate is 10 MHz.
- Is the AD8403ARUZ100 suitable for automotive applications?
Yes, it is qualified for automotive applications due to its extended temperature range and robust design.
- What is the power shutdown current of the AD8403ARUZ100?
The power shutdown current is less than 5 µA.
