MAX548AEUA

Product Overview

• Category: Integrated Circuit (IC)
• Use: Digital Potentiometer
• Characteristics: Low-power, 8-bit resolution, non-volatile memory
• Package: 16-pin TSSOP (Thin Shrink Small Outline Package)
• Essence: Provides digital control of resistance in electronic circuits
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Resolution: 8 bits
• Resistance Range: 0 to 100 kΩ
• Supply Voltage: 2.7V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Non-Volatile Memory: Stores wiper position during power-off
• End-to-End Resistance Tolerance: ±20%
• Total Harmonic Distortion: 0.01% (typical)

Pin Configuration

The MAX548AEUA has a total of 16 pins, which are assigned as follows:

1. VDD: Positive supply voltage
2. GND: Ground reference
3. SDA: Serial data input/output
4. SCL: Serial clock input
5. WP: Write protect input
6. A0: Address bit 0
7. A1: Address bit 1
8. A2: Address bit 2
9. HIZ: High impedance output
10. B0: Terminal B connection
11. W: Wiper terminal
12. A: Terminal A connection
13. VSS: Negative supply voltage
14. NC: No connection
15. NC: No connection
16. NC: No connection

Functional Features

• Digital control of resistance through I2C interface
• Non-volatile memory stores wiper position during power-off
• Low power consumption for energy-efficient applications
• Wide operating voltage range for compatibility with various systems
• High resolution allows precise adjustment of resistance

Advantages and Disadvantages

Advantages: - Non-volatile memory ensures retention of wiper position during power-off, eliminating the need for recalibration. - Low power consumption makes it suitable for battery-powered devices. - Wide operating voltage range enables compatibility with different power supply configurations.

Disadvantages: - Limited resolution (8 bits) may not be sufficient for applications requiring very fine adjustments. - End-to-end resistance tolerance of ±20% may introduce some inaccuracies in certain precision applications.

Working Principles

The MAX548AEUA is a digital potentiometer that utilizes an I2C interface to control the resistance. It consists of a series of resistive elements connected between terminal A and terminal B. The wiper terminal, W, moves along these resistive elements, effectively changing the resistance between terminals A and B. The position of the wiper is controlled digitally through the SDA and SCL pins using the I2C protocol.

During power-off, the non-volatile memory stores the wiper position, ensuring that the resistance setting is retained when power is restored. This eliminates the need for recalibration and provides convenience in applications where the resistance value needs to be maintained across power cycles.

Detailed Application Field Plans

The MAX548AEUA finds applications in various fields, including:

1. Audio Systems: Used for volume control and tone adjustment in audio amplifiers and mixers.
2. Industrial Automation: Enables digital control of resistance in industrial equipment and machinery.
3. Test and Measurement Instruments: Provides precise resistance adjustment for calibration purposes.
4. Medical Devices: Used in medical equipment for controlling parameters such as gain and filtering.
5. Automotive Electronics: Allows digital control of resistance in automotive systems like climate control and lighting.

Detailed and Complete Alternative Models

1. MAX549AESA: Similar to MAX548AEUA, but in a smaller 8-pin SOIC package.
2. MAX5406EUK+: 10-bit resolution digital potentiometer with an I2C interface.
3. MCP4017T-503E/LT: 7-bit digital potentiometer with SPI interface and volatile memory.

These alternative models offer different features and specifications, providing options for various application requirements.

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