CAT1161W28

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Digital Potentiometer
• Characteristics: Low-power, 256-tap, I2C interface
• Package: SOP-28
• Essence: Provides digital control of resistance values
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Resolution: 8-bit
• Resistance Range: 0 to 100 kΩ
• Supply Voltage: 2.7V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• I2C Bus Speed: Up to 400 kHz
• Standby Current: 1 µA (typical)

Detailed Pin Configuration

1. VCC: Power supply voltage
2. SDA: Serial data input/output for I2C communication
3. SCL: Serial clock input for I2C communication
4. A0-A7: Address inputs for device selection
5. WP: Write protect input
6. H/L: High/Low logic level input for hardware reset
7. VSS: Ground
8. RST: Reset output
9. RDY: Ready output
10. WIP: Write-in-progress output 11-18. RH0-RH7: Terminal ends of the resistor array 19-26. RL0-RL7: Terminal ends of the resistor array
11. CS: Chip select input
12. VDD: Power supply voltage

Functional Features

• Digital control of resistance values
• Non-volatile memory for storing wiper position
• I2C interface for easy integration with microcontrollers
• Low power consumption for energy-efficient applications
• Wide operating temperature range for versatile usage

Advantages

• Precise and accurate resistance control
• Compact and space-saving SOP-28 package
• Wide resistance range for various applications
• Low standby current for power-sensitive designs
• Reliable non-volatile memory for retaining settings

Disadvantages

• Limited resolution compared to higher-bit digital potentiometers
• Single-channel configuration, not suitable for multi-channel requirements
• Relatively higher cost compared to traditional mechanical potentiometers

Working Principles

The CAT1161W28 is a digital potentiometer that utilizes an internal resistor array and wiper to control the resistance value. The wiper position is controlled digitally through the I2C interface, allowing precise adjustment of the resistance. The non-volatile memory ensures that the wiper position is retained even when power is disconnected.

Detailed Application Field Plans

• Audio equipment: Volume control, tone adjustment
• Industrial automation: Calibration, fine-tuning
• Test and measurement instruments: Signal conditioning, calibration
• Consumer electronics: Display brightness control, user interface settings

Detailed and Complete Alternative Models

1. CAT5111ZI-00-GT3: 8-bit digital potentiometer, SOT-23 package
2. MCP4017T-503E/LT: 7-bit digital potentiometer, TSSOP-14 package
3. MAX5486EUD+: 10-bit digital potentiometer, TSSOP-14 package
4. AD8400ARZ10: 256-tap digital potentiometer, SOIC-8 package
5. DS1809Z-010+: Dual 64-position digital potentiometer, SOIC-16 package

(Note: This list is not exhaustive and other alternative models may exist.)

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