Overview
The AD8402ARU10, manufactured by Analog Devices Inc., is a dual-channel digital potentiometer. 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 programmable positions. It is designed to replace mechanical potentiometers and variable resistors, providing precise electronic adjustment functions.
The device operates with a single-supply voltage range of 2.7 V to 5.5 V, making it suitable for a variety of applications, including battery-powered systems. It features a 3-wire SPI-compatible serial interface for data input and a high update data loading rate of 10 MHz.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Nominal Resistance | RAB | TA = 25°C, Model: AD840XYY10 | 8 | 10 | 12 | 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 | ||
| Nominal Resistance Match | ΔR/RAB | CH 1 to CH 2, CH 3, or CH 4, VAB = VDD, TA = 25°C | 0.2 | 1 | % | |
| Power Supply Range | VDD Range | 2.7 | 5.5 | V | ||
| Supply Current (CMOS) | IDD | VIH = VDD or VIL = 0 V | 0.01 | 5 | μA | |
| Supply Current (TTL) | IDD | VIH = 2.4 V or 0.8 V, VDD = 5.5 V | 0.9 | 4 | mA | |
| Package Type | 14-TSSOP (0.173", 4.40mm Width) |
Key Features
- 256-position digitally controlled variable resistor (VR) device
- Two independent variable resistors with 10 kΩ nominal resistance
- 3-wire SPI-compatible serial data input interface
- 10 MHz update data loading rate
- Single-supply operation: 2.7 V to 5.5 V
- Power shutdown mode with less than 5 μA current consumption
- Extended industrial temperature range: −40°C to +125°C
- Available in 14-lead TSSOP package
- ±1% channel-to-channel matching tolerance
- Nominal temperature coefficient of 500 ppm/°C
Applications
- Mechanical potentiometer replacement
- Programmable filters, delays, and time constants
- Volume control and panning in audio systems
- Line impedance matching
- Power supply adjustment
- Battery-powered applications due to low power consumption
- Automotive applications due to extended temperature range and robust design
Q & A
- What is the AD8402ARU10 used for?
The AD8402ARU10 is a dual-channel digital potentiometer used to replace mechanical potentiometers and variable resistors, offering precise electronic adjustment functions.
- What is the nominal resistance of the AD8402ARU10?
The nominal resistance of the AD8402ARU10 is 10 kΩ.
- What is the operating voltage range of the AD8402ARU10?
The operating voltage range is 2.7 V to 5.5 V.
- What is the package type of the AD8402ARU10?
The package type is 14-TSSOP (0.173", 4.40mm Width).
- How many programmable positions does the AD8402ARU10 have?
The AD8402ARU10 has 256 programmable positions for each variable resistor.
- What is the temperature coefficient of the AD8402ARU10?
The nominal temperature coefficient is 500 ppm/°C.
- What is the power consumption in shutdown mode?
The power consumption in shutdown mode is less than 5 μA.
- What are some common applications of the AD8402ARU10?
Common applications include mechanical potentiometer replacement, programmable filters, volume control, line impedance matching, and power supply adjustment.
- Is the AD8402ARU10 suitable for automotive applications?
- What is the update data loading rate of the AD8402ARU10?
The update data loading rate is 10 MHz.
