Overview
The AD8400AR50-REEL, produced by Analog Devices Inc., is a single-channel digital potentiometer that offers a versatile and programmable solution for various electronic adjustment needs. This device is part of the AD8400 series, which includes single-, dual-, and quad-channel variants. The AD8400AR50-REEL specifically contains a single variable resistor in an 8-lead SOIC package, making it compact and suitable for space-saving designs. It operates as a digitally controlled variable resistor, performing the same function as a mechanical potentiometer or variable resistor.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Nominal Resistance | 50 kΩ | kΩ |
| Resistance Tolerance | ±1% | % |
| Temperature Coefficient | 500 ppm/°C | ppm/°C |
| Wiper Resistance | 50 - 100 Ω (VDD = 5V) | Ω |
| Supply Voltage | 2.7 V to 5.5 V | V |
| Update Data Loading Rate | 10 MHz | MHz |
| Power Shutdown Current | < 5 μA | μA |
| Number of Positions | 256 | - |
| Package Type | 8-Lead SOIC | - |
| Operating Temperature Range | −40°C to +125°C | °C |
Key Features
- Single-channel, 256-position digitally controlled variable resistor.
- Programmable resistance between the A terminal and the wiper or the B terminal and the wiper.
- 3-wire, SPI-compatible serial data input with a 10 MHz update data loading rate.
- Power shutdown feature with less than 5 μA current consumption.
- Midscale preset via the reset (RS) pin.
- Simple daisy-chaining capability without additional external decoding logic.
- Compact 8-lead SOIC package for space-saving designs.
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 AD8400AR50-REEL?
The nominal resistance of the AD8400AR50-REEL is 50 kΩ.
- What is the temperature coefficient of the AD8400AR50-REEL?
The temperature coefficient is 500 ppm/°C.
- What is the supply voltage range for the AD8400AR50-REEL?
The supply voltage range is 2.7 V to 5.5 V.
- How many positions does the AD8400AR50-REEL have?
The device has 256 positions.
- What is the package type of the AD8400AR50-REEL?
The package type is an 8-Lead SOIC.
- What is the operating temperature range of the AD8400AR50-REEL?
The operating temperature range is −40°C to +125°C.
- How does the power shutdown feature work?
The SHDN pin forces the resistor to an end-to-end open-circuit condition, achieving a microwatt power shutdown state.
- Can the AD8400AR50-REEL be daisy-chained?
- What are some common applications of the AD8400AR50-REEL?
- Is the AD8400AR50-REEL suitable for automotive applications?
