Overview
The AD8402AR50-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 a wide single-supply voltage range of 2.7 V to 5.5 V and is qualified for automotive and industrial applications.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Nominal Resistance | RAB | TA = 25°C | 35 | 50 | 65 | kΩ |
| Resistance Tempco | ΔRAB/ΔT | VAB = VDD, Wiper = No Connect | 500 | ppm/°C | ||
| Wiper Resistance | RW | VDD = 5V, IW = VDD/RAB | 50 | 100 | Ω | |
| Supply Voltage Range | VDD | 2.7 | 5.5 | V | ||
| Supply Current (CMOS) | IDD | VIH = VDD or VIL = 0 V | 0.01 | 5 | μA | |
| Power Shutdown Current | SHDN Pin Active | < 5 | μA | |||
| Update Data Loading Rate | 10 | MHz |
Key Features
- 256-position digitally controlled variable resistor.
- Two independent variable resistors in a 14-lead SOIC package.
- Operates over a single-supply voltage range of 2.7 V to 5.5 V.
- 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 and reset functionality.
- Qualified for automotive and industrial applications with an operating temperature range of −40°C to +125°C.
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 AD8402AR50-REEL used for?
The AD8402AR50-REEL is used as a dual-channel, digitally controlled variable resistor, replacing mechanical potentiometers in various applications.
- What are the available resistance values for the AD8402?
The AD8402 is available with nominal resistance values of 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ.
- What is the operating voltage range of the AD8402AR50-REEL?
The operating voltage range is from 2.7 V to 5.5 V.
- How many positions does the digital potentiometer have?
The digital potentiometer has 256 positions.
- What is the power shutdown current of the AD8402AR50-REEL?
The power shutdown current is less than 5 μA.
- What is the temperature coefficient of the AD8402AR50-REEL?
The temperature coefficient is 500 ppm/°C.
- What interface does the AD8402AR50-REEL use for data input?
The device uses a 3-wire SPI-compatible serial data input.
- What is the update data loading rate of the AD8402AR50-REEL?
The update data loading rate is 10 MHz.
- Is the AD8402AR50-REEL suitable for automotive applications?
- What is the operating temperature range of the AD8402AR50-REEL?
The operating temperature range is from −40°C to +125°C.
