Overview
The AD8402AR50, produced by Analog Devices Inc., is a dual-channel, 256-position digitally controlled variable resistor (VR) device. This component performs the same electronic adjustment function as a mechanical potentiometer or variable resistor. It is part of the AD8400/AD8402/AD8403 family, which includes single, dual, and quad-channel configurations. The AD8402 specifically contains two independent variable resistors in a space-saving 14-lead SOIC surface-mount package.
The device operates with a 3-wire, SPI-compatible serial data input and supports a wide range of applications due to its programmable resistance values and low power consumption.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Nominal Resistance (RAB) | TA = 25°C, Model: AD840XYY50 | 35 | 50 | 65 | kΩ |
| Nominal Resistance (RAB) | TA = 25°C, Model: AD840XYY100 | 70 | 100 | 130 | kΩ |
| Resistance Tempco (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 | ||
| Resolution | 8 Bits | ||||
| Integral Nonlinearity (INL) | VDD = 5 V, TA = 25°C | -6 | ±2 | +6 | LSB |
| Differential Nonlinearity (DNL) | VDD = 5 V, TA = 25°C | -4 | ±1.5 | +2 | LSB |
| Voltage Range (VA, VB, VW) | 0 | VDD | V | ||
| Operating Temperature Range | -40 | +125 | °C | ||
| Supply Voltage Range | 2.7 | 5.5 | V | ||
| Power Shutdown Current | < 5 | μA |
Key Features
- 256-position digitally controlled variable resistor (VR) device
- Two independent variable resistors in a 14-lead SOIC surface-mount package
- Programmable resistance values between 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ
- 3-wire, SPI-compatible serial data input
- 10 MHz update data loading rate
- 2.7 V to 5.5 V single-supply operation
- Low power shutdown current of less than 5 μA
- Operating temperature range of -40°C to +125°C
- High 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
- Qualified for automotive applications
Q & A
- What is the AD8402AR50 used for?
The AD8402AR50 is used as a dual-channel, digitally controlled variable resistor, replacing mechanical potentiometers in various applications.
- What are the available resistance values for the AD8402AR50?
The AD8402AR50 offers programmable resistance values of 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ.
- What is the operating temperature range of the AD8402AR50?
The operating temperature range is -40°C to +125°C.
- What is the supply voltage range for the AD8402AR50?
The supply voltage range is 2.7 V to 5.5 V.
- How many bits of resolution does the AD8402AR50 have?
The AD8402AR50 has an 8-bit resolution.
- What is the power shutdown current of the AD8402AR50?
The power shutdown current is less than 5 μA.
- What is the update data loading rate of the AD8402AR50?
The update data loading rate is 10 MHz.
- Is the AD8402AR50 suitable for automotive applications?
Yes, the AD8402AR50 is qualified for automotive applications.
- What is the temperature coefficient of the AD8402AR50?
The nominal temperature coefficient is 500 ppm/°C.
- What package types are available for the AD8402AR50?
The AD8402AR50 is available in 14-lead SOIC and PDIP packages, as well as in TSSOP packages.
