Overview
The AD8403AR1, produced by Analog Devices Inc., is a 4-channel digital potentiometer that offers a digitally controlled variable resistor (VR) function. This device is part of the AD8400/AD8402/AD8403 series, which replaces traditional mechanical potentiometers or variable resistors with a more precise and programmable solution. The AD8403 contains four independent variable resistors, each with 256 positions, allowing for fine-tuned adjustments in various applications.
The device operates on a single supply voltage ranging from 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 data input and supports an update data loading rate of up to 10 MHz.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Number of Channels | - | - | 4 | - | - |
| Number of Taps | - | - | 256 | - | - |
| Resistance Options | - | - | 1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ | - | - |
| Supply Voltage | - | 2.7 V | - | 5.5 V | V |
| Power Shutdown Current | - | - | - | < 5 μA | μA |
| Interface | - | - | 3-Wire SPI-Compatible | - | - |
| Update Data Loading Rate | - | - | - | 10 MHz | MHz |
| Operating Temperature | - | -40°C | - | 125°C | °C |
| Temperature Coefficient | - | - | - | 500 ppm/°C (typical) | ppm/°C |
| Wiper Resistance | VDD = 5V, IW = VDD/RAB | - | 100 Ω | - | Ω |
Key Features
- Programmable Resistance: Each variable resistor offers a completely programmable value of resistance between the A terminal and the wiper or the B terminal and the wiper.
- Low Power Consumption: Power shutdown current is less than 5 μA, making it suitable for battery-powered applications.
- High Precision: ±1% channel-to-channel matching tolerance and a nominal temperature coefficient of 500 ppm/°C.
- Fast Update Rate: Supports an update data loading rate of up to 10 MHz.
- Compact Packaging: Available in 24-lead PDIP, SOIC, and TSSOP packages.
- SPI-Compatible Interface: 3-wire serial data input for easy integration with microcontrollers.
Applications
- Mechanical Potentiometer Replacement: Replaces traditional mechanical potentiometers with a more reliable and programmable solution.
- Programmable Filters, Delays, and Time Constants: Used in applications requiring adjustable filter characteristics.
- Volume Control and Panning: Suitable for audio applications where precise volume control is necessary.
- Line Impedance Matching: Helps in matching impedance in various electronic circuits.
- Power Supply Adjustment: Used for adjusting power supply settings in electronic systems.
Q & A
- What is the AD8403AR1 used for?
The AD8403AR1 is a 4-channel digital potentiometer used to replace mechanical potentiometers or variable resistors in various electronic applications.
- What are the available resistance options for the AD8403AR1?
The AD8403AR1 is available with resistance options of 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ.
- What is the operating voltage range of the AD8403AR1?
The device operates on a single supply voltage ranging from 2.7 V to 5.5 V.
- What is the power consumption during shutdown?
The power shutdown current is less than 5 μA.
- What interface does the AD8403AR1 use?
The device uses a 3-wire SPI-compatible serial data input.
- What is the update data loading rate of the AD8403AR1?
The update data loading rate is up to 10 MHz.
- What are the typical applications of the AD8403AR1?
Typical applications include mechanical potentiometer replacement, programmable filters, volume control, line impedance matching, and power supply adjustment.
- What is the temperature coefficient of the AD8403AR1?
The nominal temperature coefficient is 500 ppm/°C.
- What are the available package options for the AD8403AR1?
The device is available in 24-lead PDIP, SOIC, and TSSOP packages.
- Is the AD8403AR1 suitable for automotive applications?
Yes, the AD8403AR1 is qualified for automotive applications and operates over the extended industrial temperature range of −40°C to +125°C.
