Overview
The AD8403AR100, manufactured by Analog Devices Inc., is a 4-channel digital potentiometer that offers a digitally controlled variable resistor (VR) function. This device is designed to replace traditional mechanical potentiometers and variable resistors, providing precise and programmable resistance settings. The AD8403AR100 is available in various packages, including 24-lead PDIP, SOIC, and TSSOP, making it versatile for different application needs.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Number of Channels | Number of independent variable resistors | 4 |
| Number of Taps | Number of resistance positions | 256 |
| Resistance (Ohms) | Nominal resistance value | 100 kΩ |
| Interface | Type of serial data input interface | 3-wire SPI-compatible |
| Voltage - Supply | Operating voltage range | 2.7 V to 5.5 V |
| Operating Temperature | Temperature range for operation | -40°C to +125°C |
| Temperature Coefficient | Temperature coefficient of resistance | 500 ppm/°C |
| Wiper Resistance | Typical wiper resistance | 200 Ω (at VDD = 5V) |
| Package | Type of package | 24-SOIC (0.295", 7.50mm Width) |
| Power Shutdown | Current consumption in shutdown mode | Less than 5 μA |
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 Shutdown: The device can be shut down to a microwatt power state, consuming less than 5 μA.
- High-Speed Interface: Supports a 10 MHz update data loading rate through a 3-wire SPI-compatible serial data input.
- Precision and Linearity: Offers ±1% channel-to-channel matching tolerance and a nominal temperature coefficient of 500 ppm/°C.
- Compact Packaging: Available in 24-lead PDIP, SOIC, and TSSOP packages, suitable for various applications.
- Midscale Preset: The reset pin forces the wiper to midscale by loading 80H into the VR latch.
Applications
- Mechanical Potentiometer Replacement: Ideal for replacing traditional mechanical potentiometers in various circuits.
- Programmable Filters, Delays, and Time Constants: Can be used in applications requiring adjustable filter characteristics, delay lines, and time constants.
- Volume Control and Panning: Suitable for audio applications where precise volume control and panning are required.
- Line Impedance Matching: Used for matching impedance in various signal transmission lines.
- Power Supply Adjustment: Can be used to adjust power supply settings in electronic circuits.
Q & A
- What is the AD8403AR100 used for?
The AD8403AR100 is a 4-channel digital potentiometer used to replace mechanical potentiometers and variable resistors, offering precise and programmable resistance settings.
- What are the available resistance values for the AD8403AR100?
The AD8403AR100 is available with nominal resistance values of 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ.
- What is the operating voltage range of the AD8403AR100?
The device operates within a voltage range of 2.7 V to 5.5 V.
- What is the temperature coefficient of the AD8403AR100?
The temperature coefficient of the AD8403AR100 is 500 ppm/°C.
- How many taps does the AD8403AR100 have?
The device has 256 taps or resistance positions.
- What type of interface does the AD8403AR100 use?
The device uses a 3-wire SPI-compatible serial data input interface.
- What is the power consumption in shutdown mode?
The device consumes less than 5 μA in shutdown mode.
- What are the available packages for the AD8403AR100?
The device is available in 24-lead PDIP, SOIC, and TSSOP packages.
- Can the AD8403AR100 be used in automotive applications?
Yes, the AD8403AR100 is qualified for automotive applications.
- How does the reset pin function on the AD8403AR100?
The reset pin forces the wiper to midscale by loading 80H into the VR latch.
