Overview
The AD8400ARZ100-REEL is a single-channel digitally controlled variable resistor (VR) device manufactured by Analog Devices Inc. This component performs 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 the digital code loaded into the controlling serial input register. The resistance between the wiper and either endpoint of the fixed resistor varies linearly with respect to the digital code transferred into the VR latch.
This device is particularly useful for applications requiring programmable resistance, such as mechanical potentiometer replacement, programmable filters, delays, time constants, volume control, panning, line impedance matching, and power supply adjustment.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Channels | Single |
| End-to-End Resistance (RAB) | 100 kΩ |
| Number of Taps | 256 |
| Tolerance | ±30% |
| Temperature Coefficient | 500 ppm/°C |
| Memory Type | Volatile |
| Interface | 3-Wire, SPI-Compatible Serial |
| Power Supply Range | 2.7 V to 5.5 V |
| Operating Temperature Range | -40°C to +125°C |
| Package Type | 8-Lead SOIC-N |
| Shutdown Current | Less than 5 μA |
| Update Data Loading Rate | 10 MHz |
| Bandwidth | 600 kHz (typical, R = 10 kΩ) |
| Total Harmonic Distortion | 0.003% (typical, VA = 1 Vrms + 2 VDC, VB = 2 VDC, f = 1 kHz) |
Key Features
- 256-position variable resistance device, capable of replacing 1, 2, or 4 potentiometers.
- 3-wire, SPI-compatible serial data input for easy integration with microcontrollers.
- Low power shutdown current of less than 5 μA.
- High update data loading rate of 10 MHz.
- Single-supply operation from 2.7 V to 5.5 V, making it suitable for battery-powered applications.
- Compact 8-lead SOIC-N package.
- Operating temperature range from -40°C to +125°C.
- Typical integral nonlinearity of ±1/2 LSB and differential nonlinearity of ±1/4 LSB.
Applications
- Mechanical potentiometer replacement.
- Programmable filters, delays, and time constants.
- Volume control and panning in audio systems.
- Line impedance matching.
- Power supply adjustment.
- Battery-powered applications due to its low power consumption.
Q & A
- What is the AD8400ARZ100-REEL used for?
The AD8400ARZ100-REEL is used as a digitally controlled variable resistor, replacing mechanical potentiometers and providing programmable resistance in various applications.
- How many taps does the AD8400ARZ100-REEL have?
The device has 256 taps, allowing for precise control over the resistance.
- What is the end-to-end resistance of the AD8400ARZ100-REEL?
The end-to-end resistance (RAB) is 100 kΩ.
- What is the interface type of the AD8400ARZ100-REEL?
The device uses a 3-wire, SPI-compatible serial interface.
- What is the power supply range for the AD8400ARZ100-REEL?
The device operates on a single supply from 2.7 V to 5.5 V.
- What is the operating temperature range of the AD8400ARZ100-REEL?
The operating temperature range is from -40°C to +125°C.
- What is the package type of the AD8400ARZ100-REEL?
The device is packaged in an 8-lead SOIC-N.
- How much current does the AD8400ARZ100-REEL consume in shutdown mode?
The shutdown current is less than 5 μA.
- What is the update data loading rate of the AD8400ARZ100-REEL?
The update data loading rate is 10 MHz.
- What are some common applications of the AD8400ARZ100-REEL?
Common applications include mechanical potentiometer replacement, programmable filters, volume control, line impedance matching, and power supply adjustment.
