Overview
The AD8400ARZ1, produced by Analog Devices Inc., is a single-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 a compact and programmable solution. The AD8400ARZ1 is housed in an 8-lead SOIC package and operates with a single-supply voltage range of 2.7 V to 5.5 V. It features a 256-position digital potentiometer, allowing for precise control over the resistance value between the wiper and the fixed resistor endpoints.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Channels | 1 | |
| Number of Taps | 256 | |
| Fixed Resistor Values | 1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ | |
| Channel-to-Channel Matching Tolerance | ±1% | |
| Temperature Coefficient | 500 ppm/°C | |
| Power Shutdown Current | < 5 μA | |
| Serial Interface | 3-Wire SPI-Compatible | |
| Data Loading Rate | 10 MHz | |
| Supply Voltage Range | 2.7 V to 5.5 V | |
| Package Type | 8-Lead SOIC |
Key Features
- Programmable Resistance: The AD8400ARZ1 allows for completely programmable resistance values between the A terminal and the wiper or the B terminal and the wiper.
- Low Power Shutdown: The device features a power shutdown mode with a current of less than 5 μA.
- SPI-Compatible Interface: It uses a 3-wire SPI-compatible serial data input interface with a data loading rate of up to 10 MHz.
- Compact Packaging: Available in an 8-lead SOIC package, making it suitable for space-constrained applications.
- High Accuracy: Offers ±1% channel-to-channel matching tolerance and a nominal temperature coefficient of 500 ppm/°C.
- Glitch-Free Operation: A unique switching circuit minimizes high glitches, avoiding make-before-break or break-before-make operations.
Applications
- Mechanical Potentiometer Replacement: Replaces traditional mechanical potentiometers and variable resistors in various applications.
- Programmable Filters, Delays, Time Constants: Used in adjustable filter circuits, delay lines, and time constant settings.
- Volume Control and Panning: Suitable for audio applications requiring precise volume control and panning.
- Line Impedance Matching: Helps in matching line impedances in various electronic circuits.
- Power Supply Adjustment: Used for adjusting power supply voltages and currents.
Q & A
- What is the AD8400ARZ1 used for?
The AD8400ARZ1 is used as a digital potentiometer to replace traditional mechanical potentiometers and variable resistors, offering programmable resistance values.
- What are the available fixed resistor values for the AD8400ARZ1?
The fixed resistor values available are 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ.
- What is the channel-to-channel matching tolerance of the AD8400ARZ1?
The channel-to-channel matching tolerance is ±1%.
- How does the AD8400ARZ1 handle power shutdown?
The device features a power shutdown mode with a current of less than 5 μA.
- What type of serial interface does the AD8400ARZ1 use?
The AD8400ARZ1 uses a 3-wire SPI-compatible serial data input interface.
- What is the data loading rate of the AD8400ARZ1?
The data loading rate is up to 10 MHz.
- What is the supply voltage range for the AD8400ARZ1?
The supply voltage range is from 2.7 V to 5.5 V.
- In what package is the AD8400ARZ1 available?
The AD8400ARZ1 is available in an 8-lead SOIC package.
- What are some common applications of the AD8400ARZ1?
Common applications include mechanical potentiometer replacement, programmable filters, delays, time constants, volume control, panning, line impedance matching, and power supply adjustment.
- How does the AD8400ARZ1 minimize glitches during operation?
The device uses a unique switching circuit that minimizes high glitches, avoiding make-before-break or break-before-make operations.
