DS1804U-050/T&R

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Digital Potentiometer
• Characteristics: Non-volatile, 50kΩ resistance range, 256 tap points
• Package: T&R (Tape and Reel)
• Essence: Adjustable resistor with digital control
• Packaging/Quantity: 2500 units per reel

Specifications

• Resistance Range: 50kΩ
• Tap Points: 256
• Supply Voltage: 2.7V to 5.5V
• Temperature Range: -40°C to +85°C
• End-to-End Resistance Tolerance: ±20%
• Non-volatile Memory: Yes
• Wiper Current: 1µA (typical)
• Standby Current: 10nA (typical)

Detailed Pin Configuration

The DS1804U-050/T&R has a total of 8 pins: 1. VCC: Supply voltage input 2. GND: Ground reference 3. H/L: High/Low logic input for controlling the potentiometer 4. INC: Increment input for increasing the resistance value 5. UD: Up/Down control input for changing the resistance value 6. CS: Chip select input for enabling the device 7. W: Wiper output, connected to the wiper terminal of the potentiometer 8. A/B: Terminal connections of the potentiometer

Functional Features

• Digital Control: The DS1804U-050/T&R allows precise digital control over the resistance value.
• Non-volatile Memory: The device retains its resistance setting even when power is removed.
• Increment/Decrement Functionality: The potentiometer can be adjusted incrementally or decremented using the INC and UD inputs.
• Low Power Consumption: The DS1804U-050/T&R operates with low power consumption, making it suitable for battery-powered applications.
• Wide Temperature Range: The device can operate in a wide temperature range, making it suitable for various environments.

Advantages and Disadvantages

Advantages: - Precise resistance control - Non-volatile memory ensures retention of settings - Increment/Decrement functionality allows fine adjustments - Low power consumption

Disadvantages: - Limited resistance range (50kΩ) - End-to-end resistance tolerance of ±20%

Working Principles

The DS1804U-050/T&R is based on the concept of a digital potentiometer. It consists of a series of resistive elements connected in a ladder-like configuration. By controlling the wiper position, the effective resistance between the wiper terminal and one of the terminal connections can be adjusted digitally. The device utilizes non-volatile memory to retain the resistance setting even when power is removed.

Detailed Application Field Plans

The DS1804U-050/T&R finds applications in various fields, including: 1. Audio Equipment: Volume control, tone adjustment 2. Industrial Control Systems: Calibration, feedback control 3. Test and Measurement Instruments: Fine resistance adjustment, calibration 4. Consumer Electronics: Display brightness control, user interface adjustment

Detailed and Complete Alternative Models

1. DS1804U-100/T&R: 100kΩ resistance range, 256 tap points
2. DS1804U-500/T&R: 500kΩ resistance range, 256 tap points
3. DS1804U-1M/T&R: 1MΩ resistance range, 256 tap points

These alternative models offer different resistance ranges while maintaining the same functionality as the DS1804U-050/T&R.

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