Overview
The AD8402AR10-REEL, produced by Analog Devices Inc., is a dual-channel, 256-position digitally controlled variable resistor (VR) device. This component is part of the AD8400/AD8402/AD8403 family, which provides electronic adjustment functions similar to mechanical potentiometers or variable resistors. The AD8402 specifically contains two independent variable resistors in a space-saving 14-lead SOIC surface-mount package. It operates over an extended industrial temperature range of −40°C to +125°C, making it suitable for a variety of applications.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Nominal Resistance | RAB | TA = 25°C | 8 | 10 | 12 | kΩ |
| Resistance Temperature Coefficient | ΔRAB/ΔT | VAB = VDD, Wiper = No Connect | 500 | ppm/°C | ||
| Wiper Resistance | RW | VDD = 5V, IW = VDD/RAB | 50 | 100 | Ω | |
| Wiper Resistance | RW | VDD = 3V, IW = VDD/RAB | 200 | Ω | ||
| Nominal Resistance Match | ΔR/RAB | CH 1 to CH 2, VAB = VDD, TA = 25°C | 0.2 | 1 | % | |
| Resolution | N | 8 Bits | ||||
| Integral Nonlinearity | INL | -2 | ±1/2 | +2 | LSB | |
| Differential Nonlinearity | DNL | -1 | ±1/4 | +1 | LSB | |
| Operating Temperature Range | TA | -40 | +125 | °C | ||
| Supply Voltage Range | VDD | 2.7 | 5.5 | V |
Key Features
- Two independent, 256-position digitally controlled variable resistors.
- Available in 14-lead SOIC surface-mount package.
- Operating temperature range: −40°C to +125°C.
- Single-supply operation: 2.7 V to 5.5 V.
- 3-wire, SPI-compatible serial data input.
- 10 MHz update data loading rate.
- Power shutdown current less than 5 μA.
- Channel-to-channel matching tolerance of ±1%.
- Nominal temperature coefficient of 500 ppm/°C.
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 AD8402AR10-REEL used for?
The AD8402AR10-REEL is used as a dual-channel, digitally controlled variable resistor, replacing mechanical potentiometers in various applications.
- What is the nominal resistance of the AD8402AR10-REEL?
The nominal resistance of the AD8402AR10-REEL is 10 kΩ.
- What is the operating temperature range of the AD8402AR10-REEL?
The operating temperature range is −40°C to +125°C.
- What is the supply voltage range for the AD8402AR10-REEL?
The supply voltage range is 2.7 V to 5.5 V.
- How many positions does the digital potentiometer have?
The digital potentiometer has 256 positions.
- What is the resolution of the AD8402AR10-REEL?
The resolution is 8 bits.
- What is the integral nonlinearity of the AD8402AR10-REEL?
The integral nonlinearity is -2 to +2 LSB.
- What is the differential nonlinearity of the AD8402AR10-REEL?
The differential nonlinearity is -1 to +1 LSB.
- What is the wiper resistance of the AD8402AR10-REEL?
The wiper resistance is typically 50 Ω to 100 Ω at VDD = 5V.
- Is the AD8402AR10-REEL suitable for automotive applications?
Yes, it is qualified for automotive applications.
