AD8402ARU100-REEL

Product Overview

Category: Integrated Circuit (IC)

Use: Digital Potentiometer

Characteristics: - Dual-channel, 256-position digital potentiometer - Non-volatile memory for storing wiper settings - Serial interface for easy control and programming - Wide operating voltage range: 2.7V to 5.5V - Low power consumption - Small package size for space-constrained applications

Package: TSSOP-16

Essence: The AD8402ARU100-REEL is a dual-channel digital potentiometer IC that allows for precise resistance adjustment in electronic circuits. It offers non-volatile memory, which means that the wiper settings can be stored even when power is removed.

Packaging/Quantity: The AD8402ARU100-REEL is available in tape and reel packaging, with 250 units per reel.

Specifications

• Resolution: 8 bits (256 positions)
• Resistance Range: 0Ω to 100kΩ
• Temperature Range: -40°C to +85°C
• Supply Voltage Range: 2.7V to 5.5V
• Total Harmonic Distortion: 0.01%
• Power Supply Rejection Ratio: 80dB
• Digital Interface: SPI-compatible serial interface

Pin Configuration

The AD8402ARU100-REEL has a total of 16 pins, arranged as follows:

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| | | 1 2 3 4 5 6 7 8 | |_______________________________________| | | | 9 10 11 12 13 14 15 16 | |_______________________________________| ```

Pin Description: 1. VDD: Positive power supply 2. SDO: Serial data output 3. SDI: Serial data input 4. CS: Chip select 5. SCLK: Serial clock 6. GND: Ground 7. W0A: Channel A wiper terminal 8. VSSA: Negative power supply for channel A 9. VDD: Positive power supply 10. SDO: Serial data output 11. SDI: Serial data input 12. CS: Chip select 13. SCLK: Serial clock 14. GND: Ground 15. W0B: Channel B wiper terminal 16. VSSB: Negative power supply for channel B

Functional Features

• Dual-channel operation allows independent control of two potentiometers.
• Non-volatile memory ensures that the wiper settings are retained even when power is removed.
• Serial interface enables easy control and programming of the digital potentiometer.
• Wide operating voltage range makes it suitable for various applications.
• Low power consumption helps in energy-efficient designs.
• Small package size saves space in compact electronic devices.

Advantages and Disadvantages

Advantages: - Precise resistance adjustment with 256 positions - Non-volatile memory for storing wiper settings - Easy control and programming through a serial interface - Wide operating voltage range for versatility - Low power consumption for energy efficiency - Compact package size for space-constrained applications

Disadvantages: - Limited resolution compared to higher-bit digital potentiometers - Temperature range may not be suitable for extreme environments

Working Principles

The AD8402ARU100-REEL operates as a digital potentiometer by using a series of resistive elements and switches controlled by digital signals. The resistance between the wiper terminal and either end terminal can be adjusted digitally, allowing for precise resistance values.

The non-volatile memory feature ensures that the wiper settings are retained even when power is removed. This allows for consistent resistance values upon power-up.

The digital potentiometer communicates with a microcontroller or other control device through a serial interface, typically using SPI (Serial Peripheral Interface) protocol. This enables easy control and programming of the potentiometer's settings.

Detailed Application Field Plans

The AD8402ARU100-REEL finds applications in various fields, including:

1. Audio Equipment: Precise volume control in audio amplifiers, mixers, and equalizers.
2. Industrial Automation: Adjustable resistance for calibration and control purposes.
3. Test and Measurement Instruments: Fine-tuning of signal levels and calibration adjustments.
4. Automotive Electronics: Control of lighting intensity, fan speed, and other adjustable parameters.
5. Medical Devices: Resistance adjustment in medical equipment for accurate measurements.

Detailed and Complete Alternative Models

1. AD8400ARZ10 - Single-channel digital potentiometer with 10kΩ resistance range