Overview
The AD8403ARZ1, produced by Analog Devices Inc., is a quad-channel, 256-position digitally controlled variable resistor (VR) device. This component performs the same electronic adjustment function as a mechanical potentiometer or variable resistor. It is available in a 24-lead SOIC (Wide) package and operates over an extended industrial temperature range of −40°C to +125°C.
The AD8403 is part of a family of devices that includes the AD8400 (single-channel) and AD8402 (dual-channel), offering flexibility in design and application. Each variable resistor in the AD8403 can be programmed to a specific resistance value between the A terminal and the wiper or the B terminal and the wiper, making it highly versatile for various electronic adjustments.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Channels | 4 | |
| Number of Positions | 256 | |
| Nominal Resistance | 1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ | Ω |
| Power Shutdown Current | < 5 µA | µA |
| Serial Data Input | 3-Wire SPI-Compatible | |
| Update Data Loading Rate | 10 MHz | MHz |
| Supply Voltage | 2.7 V to 5.5 V | V |
| Temperature Range | −40°C to +125°C | °C |
| Package Type | 24-Lead SOIC (Wide) |
Key Features
- Completely programmable resistance values between the A terminal and the wiper or the B terminal and the wiper.
- Unique switching circuit minimizes high glitch, avoiding make-before-break or break-before-make operation.
- ±1% channel-to-channel matching tolerance and a nominal temperature coefficient of 500 ppm/°C.
- Low power shutdown current of less than 5 µA.
- 3-Wire SPI-Compatible serial data input with a 10 MHz update data loading rate.
- Single-supply operation from 2.7 V to 5.5 V.
- Qualified for automotive applications.
Applications
- Mechanical potentiometer replacement.
- Programmable filters, delays, and time constants.
- Volume control and panning.
- Line impedance matching.
- Power supply adjustment.
- Automotive applications.
Q & A
- What is the AD8403ARZ1 used for?
The AD8403ARZ1 is a quad-channel, 256-position digitally controlled variable resistor used to replace mechanical potentiometers and for various electronic adjustments.
- What are the available nominal resistance values for the AD8403?
The available nominal resistance values are 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ.
- What is the operating temperature range of the AD8403?
The operating temperature range is −40°C to +125°C.
- What type of serial data input does the AD8403 use?
The AD8403 uses a 3-Wire SPI-Compatible serial data input.
- What is the power shutdown current of the AD8403?
The power shutdown current is less than 5 µA.
- What is the supply voltage range for the AD8403?
The supply voltage range is from 2.7 V to 5.5 V.
- What package types are available for the AD8403?
The AD8403 is available in 24-lead PDIP, SOIC, and TSSOP packages.
- Is the AD8403 qualified for automotive applications?
- What is the channel-to-channel matching tolerance of the AD8403?
The channel-to-channel matching tolerance is ±1%.
- What is the temperature coefficient of the AD8403?
The nominal temperature coefficient is 500 ppm/°C.
