Overview
The AD8402ARZ1-REEL, produced by Analog Devices Inc., is a dual-channel, 8-bit digital potentiometer. This device is part of the AD8400/AD8402/AD8403 series, which provides digitally controlled variable resistor functionality. The AD8402 specifically contains two independent variable resistors in a space-saving 14-lead SOIC (Small Outline Integrated Circuit) package. These devices perform the same electronic adjustment function as mechanical potentiometers or variable resistors, offering a highly programmable and precise resistance control.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Channels | 2 | - |
| Resolution | 8 bits | - |
| Number of Positions | 256 | - |
| Nominal Resistance (RAB) | 1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ | Ω |
| Resistance Tolerance | ±1% | - |
| Temperature Coefficient (ΔRAB/ΔT) | 500 ppm/°C | - |
| Wiper Resistance (RW) | 50 Ω (VDD = 5V), 200 Ω (VDD = 3V) | Ω |
| Supply Voltage (VDD) | 2.7 V to 5.5 V | V |
| Operating Temperature Range | -40°C to +125°C | °C |
| Package Type | 14-Lead SOIC | - |
Key Features
- Dual-channel, 8-bit digital potentiometer with 256 positions.
- 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 mode with less than 5 μA current consumption.
- Single-supply operation from 2.7 V to 5.5 V.
- Qualified for automotive applications.
Applications
- Mechanical potentiometer replacement.
- Programmable filters, delays, and time constants.
- Volume control and panning in audio systems.
- Line impedance matching.
- Power supply adjustment.
Q & A
- What is the AD8402ARZ1-REEL used for?
The AD8402ARZ1-REEL is used as a dual-channel digital potentiometer, replacing mechanical potentiometers in various applications.
- What are the available nominal resistance values for the AD8402?
The nominal resistance values available are 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ.
- What is the resolution of the AD8402?
The resolution is 8 bits, providing 256 positions.
- What is the operating temperature range of the AD8402?
The operating temperature range is -40°C to +125°C.
- What is the supply voltage range for the AD8402?
The supply voltage range is from 2.7 V to 5.5 V.
- How many channels does the AD8402 have?
The AD8402 has two independent channels.
- What is the package type of the AD8402ARZ1-REEL?
The package type is a 14-Lead SOIC.
- Is the AD8402 qualified for automotive applications?
- What is the wiper resistance of the AD8402?
The wiper resistance is approximately 50 Ω at VDD = 5V and 200 Ω at VDD = 3V.
- How does the AD8402 communicate?
The AD8402 uses a 3-wire, SPI-compatible serial data input.
