Overview
The AD8402ARZ100 is a dual-channel digital potentiometer produced by Analog Devices Inc. This device is part of the AD8400/AD8402/AD8403 series, which provides digitally controlled variable resistors. The AD8402 specifically contains two independent variable resistors, each offering 256 positions of resistance adjustment. This component is designed to replace mechanical potentiometers and variable resistors, providing precise and programmable resistance settings.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Channels | 2 | - |
| Number of Positions | 256 | - |
| Nominal Resistance | 100 kΩ | Ω |
| Power Shutdown Current | < 5 μA | μA |
| Supply Voltage Range | 2.7 V to 5.5 V | V |
| Operating Temperature Range | −40°C to +125°C | °C |
| Package Type | 14-Lead SOIC | - |
| Update Data Loading Rate | 10 MHz | MHz |
| Integral Nonlinearity (INL) | −6 to +6 LSB | LSB |
| Differential Nonlinearity (DNL) | −4 to +2 LSB (VDD = 5 V) | LSB |
Key Features
- 256-position digitally controlled variable resistor
- Replaces mechanical potentiometers and variable resistors
- 3-wire SPI-compatible serial data input
- Power shutdown feature with less than 5 μA current
- Single-supply operation from 2.7 V to 5.5 V
- Midscale preset and reset functionality
- Daisy chaining capability without additional external decoding logic
- Qualified for automotive applications
Applications
- Mechanical potentiometer replacement
- Programmable filters, delays, and time constants
- Volume control and panning
- Line impedance matching
- Power supply adjustment
- Automotive applications
Q & A
- What is the AD8402ARZ100 used for?
The AD8402ARZ100 is used as a dual-channel digital potentiometer to replace mechanical potentiometers and variable resistors, offering precise and programmable resistance settings.
- How many positions of resistance does the AD8402ARZ100 offer?
The AD8402ARZ100 offers 256 positions of resistance adjustment for each channel.
- What is the nominal resistance of the AD8402ARZ100?
The nominal resistance of the AD8402ARZ100 is 100 kΩ.
- What is the operating temperature range of the AD8402ARZ100?
The operating temperature range is −40°C to +125°C.
- What package type is the AD8402ARZ100 available in?
The AD8402ARZ100 is available in a 14-Lead SOIC package.
- How does the power shutdown feature work?
The power shutdown feature forces the resistor to an end-to-end open-circuit condition and shorts the wiper to the B terminal, achieving a microwatt power shutdown state.
- Can the AD8402ARZ100 be daisy-chained?
- What is the update data loading rate of the AD8402ARZ100?
The update data loading rate is 10 MHz.
- Is the AD8402ARZ100 qualified for automotive applications?
- What is the supply voltage range for the AD8402ARZ100?
The supply voltage range is from 2.7 V to 5.5 V.
- What communication protocol does the AD8402ARZ100 use?
The AD8402ARZ100 uses a 3-wire SPI-compatible serial data input.
