Overview
The AD8400ARZ50, produced by Analog Devices Inc., is a single-channel, 256-position digitally controlled variable resistor (VR) device. This component is part of the AD8400 series, which includes the AD8402 and AD8403 models with dual and quad channels, respectively. The AD8400ARZ50 is housed in a compact 8-lead SOIC package and operates as a digital potentiometer, replacing traditional mechanical potentiometers or variable resistors. It offers a programmable resistance value between the A terminal and the wiper or the B terminal and the wiper, making it versatile for various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Taps | 256 | - |
| Resistance Range | 50 kΩ | Ω |
| Supply Voltage | 2.7 V to 5.5 V | V |
| Operating Temperature | -40°C to +125°C | °C |
| Interface | 3-Wire SPI-Compatible Serial | - |
| Update Data Loading Rate | 10 MHz | - |
| Shutdown Current | < 5 µA | µA |
| Wiper Resistance (Typ.) | 200 Ω | Ω |
| Temperature Coefficient | 500 ppm/°C | - |
| Package Type | 8-SOIC | - |
Key Features
- Programmable Resistance: Offers a completely programmable value of resistance between the A terminal and the wiper or the B terminal and the wiper.
- Low Power Shutdown: Less than 5 µA shutdown current, achieving a microwatt power shutdown state.
- SPI-Compatible Interface: 3-wire serial interface with a 10 MHz update data loading rate.
- Wide Operating Range: Operates over a supply voltage range of 2.7 V to 5.5 V and an extended industrial temperature range of -40°C to +125°C.
- High Precision: ±1% channel-to-channel matching tolerance and a nominal temperature coefficient of 500 ppm/°C.
- Compact Package: Available in an 8-lead SOIC package.
Applications
- Mechanical Potentiometer Replacement: Replaces traditional mechanical potentiometers or 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 impedance in various signal processing circuits.
- Power Supply Adjustment: Used in power supply circuits for adjustable voltage settings.
Q & A
- What is the primary function of the AD8400ARZ50?
The AD8400ARZ50 is a digitally controlled variable resistor (VR) device that performs the same electronic adjustment function as a mechanical potentiometer or variable resistor.
- What are the available resistance ranges for the AD8400 series?
The AD8400 series offers resistance ranges of 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ. The AD8400ARZ50 specifically has a resistance range of 50 kΩ.
- What is the operating temperature range of the AD8400ARZ50?
The AD8400ARZ50 operates over an extended industrial temperature range of -40°C to +125°C.
- What type of interface does the AD8400ARZ50 use?
The AD8400ARZ50 uses a 3-wire SPI-compatible serial interface.
- How does the power shutdown feature work on the AD8400ARZ50?
The SHDN pin forces the resistor to an end-to-end open-circuit condition on the A terminal and shorts the wiper to the B terminal, achieving a microwatt power shutdown state.
- What is the typical wiper resistance of the AD8400ARZ50?
The typical wiper resistance of the AD8400ARZ50 is 200 Ω.
- What is the temperature coefficient of the AD8400ARZ50?
The nominal temperature coefficient of the AD8400ARZ50 is 500 ppm/°C.
- In what package is the AD8400ARZ50 available?
The AD8400ARZ50 is available in an 8-lead SOIC package.
- What are some common applications of the AD8400ARZ50?
Common applications include mechanical potentiometer replacement, programmable filters, delays, time constants, volume control, panning, line impedance matching, and power supply adjustment.
- What is the supply voltage range for the AD8400ARZ50?
The supply voltage range for the AD8400ARZ50 is 2.7 V to 5.5 V.
