Overview
The AD8400ARZ50-REEL, 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 single, dual, and quad-channel variants. The AD8400ARZ50-REEL is housed in an 8-lead SOIC package and is designed to perform the same electronic adjustment function as a mechanical potentiometer or variable resistor. It features a fixed resistor with a wiper contact that taps the fixed resistor value at a point determined by a digital code loaded into the controlling serial input register.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Nominal Resistance | 50 kΩ | kΩ |
| Resistance Tolerance | ±1% | % |
| Temperature Coefficient | 500 ppm/°C | ppm/°C |
| Wiper Resistance | 50 Ω (VDD = 5V), 200 Ω (VDD = 3V) | Ω |
| Supply Voltage | 2.7 V to 5.5 V | V |
| Power Shutdown Current | < 5 μA | μA |
| Resolution | 8 Bits (256 positions) | Bits |
| Update Data Loading Rate | 10 MHz | MHz |
| Package Type | 8-Lead SOIC | - |
| Operating Temperature | −40°C to +125°C | °C |
Key Features
- Single-channel, 256-position digitally controlled variable resistor.
- 3-wire, SPI-compatible serial data input interface.
- Power shutdown feature with less than 5 μA current consumption.
- Operating voltage range of 2.7 V to 5.5 V.
- High update data loading rate of 10 MHz.
- Midscale preset and reset functionality.
- Compact SOIC-8 package.
- Qualified for automotive applications.
Applications
- Mechanical potentiometer replacement.
- Programmable filters, delays, and time constants.
- Volume control and panning.
- Line impedance matching.
- Power supply adjustment.
Q & A
- What is the nominal resistance of the AD8400ARZ50-REEL?
The nominal resistance of the AD8400ARZ50-REEL is 50 kΩ.
- What is the operating voltage range of the AD8400ARZ50-REEL?
The operating voltage range is 2.7 V to 5.5 V.
- What is the resolution of the AD8400ARZ50-REEL?
The resolution is 8 bits, providing 256 positions.
- How does the power shutdown feature work?
The power shutdown feature forces the resistor to an end-to-end open-circuit condition on the A terminal and shorts the wiper to the B terminal, consuming less than 5 μA.
- What is the temperature coefficient of the AD8400ARZ50-REEL?
The temperature coefficient is 500 ppm/°C.
- What package type is the AD8400ARZ50-REEL available in?
The component is available in an 8-lead SOIC package.
- What are some common applications of the AD8400ARZ50-REEL?
- Is the AD8400ARZ50-REEL qualified for automotive applications?
- How does the serial data input interface work?
The component uses a 3-wire, SPI-compatible serial data input interface with a data loading rate of 10 MHz.
- What is the wiper resistance of the AD8400ARZ50-REEL?
The wiper resistance is 50 Ω at VDD = 5V and 200 Ω at VDD = 3V.
