DS1804U-100/T&R

Product Overview

Category

The DS1804U-100/T&R belongs to the category of digital potentiometers.

Use

It is commonly used as a variable resistor in electronic circuits, providing a digitally controlled resistance value.

Characteristics

• Digital control: The DS1804U-100/T&R can be controlled digitally, allowing for precise adjustment of resistance.
• Non-volatile memory: It retains its resistance setting even when power is removed.
• Low power consumption: It operates with low power requirements, making it suitable for battery-powered devices.
• Wide resistance range: The DS1804U-100/T&R offers a wide range of resistance values, catering to various applications.

Package

The DS1804U-100/T&R is available in a small surface-mount package, which facilitates easy integration into circuit boards.

Essence

The essence of the DS1804U-100/T&R lies in its ability to provide a digitally adjustable resistance value, offering flexibility and precision in electronic circuits.

Packaging/Quantity

The DS1804U-100/T&R is typically packaged in reels, with a quantity of 250 units per reel.

Specifications

• Resistance Range: 0Ω to 100kΩ
• Resolution: 256 steps
• Supply Voltage: 2.7V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Interface: Serial (3-wire)

Detailed Pin Configuration

1. VCC: Power supply voltage
2. GND: Ground reference
3. CS: Chip select input
4. SCLK: Serial clock input
5. SDI: Serial data input
6. SDO: Serial data output
7. U/D: Up/Down control input
8. RST: Reset input
9. H/L: High/Low control input
10. W: Wiper terminal

Functional Features

• Digital control: The DS1804U-100/T&R allows for precise resistance adjustment through digital signals.
• Non-volatile memory: It retains the resistance setting even when power is removed, ensuring consistent performance.
• Up/Down control: The U/D pin enables both increasing and decreasing resistance values.
• Reset function: The RST pin resets the potentiometer to its initial state.
• High/Low control: The H/L pin selects between high or low resistance values.
• Serial interface: The DS1804U-100/T&R communicates using a simple 3-wire serial interface.

Advantages and Disadvantages

Advantages

• Precise resistance adjustment
• Non-volatile memory
• Low power consumption
• Wide resistance range
• Small package size

Disadvantages

• Limited resolution (256 steps)
• Requires additional circuitry for control

Working Principles

The DS1804U-100/T&R utilizes a combination of digital logic and analog circuitry to achieve variable resistance. It consists of a series of resistive elements connected in a ladder configuration. By digitally controlling the wiper position along this ladder, the effective resistance can be adjusted.

Detailed Application Field Plans

The DS1804U-100/T&R finds applications in various fields, including:

1. Audio equipment: Used for volume control and tone adjustment in audio amplifiers and mixers.
2. Industrial automation: Employed in motor speed control circuits and industrial instrumentation.
3. Consumer electronics: Integrated into televisions, set-top boxes, and gaming consoles for user-controlled settings.
4. Automotive electronics: Utilized in automotive audio systems and climate control units for user-adjustable parameters.
5. Medical devices: Incorporated into medical equipment for precise resistance control in diagnostic and therapeutic applications.

Detailed and Complete Alternative Models

1. DS1804Z-100+: Similar to DS1804U-100/T&R, but available in a different package.
2. MCP4131-103E/P: Digital potentiometer with similar specifications and features.
3. MAX5486EUD+: High-resolution digital potentiometer with enhanced performance.

These alternative models offer similar functionality and can be considered as substitutes for the DS1804U-100/T&R.

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