DAC7801LU

Product Overview

Category: Digital-to-Analog Converter (DAC)

Use: The DAC7801LU is a high-performance, low-power, 12-bit voltage-output digital-to-analog converter. It is designed for various applications that require precise analog output generation, such as industrial control systems, data acquisition systems, and instrumentation.

Characteristics: - High resolution: 12-bit digital-to-analog conversion - Low power consumption: Operates at a low supply current of 0.5 mA - Voltage output range: 0 to Vref - Fast settling time: Provides a settling time of 10 µs - Wide temperature range: Suitable for operation in industrial environments (-40°C to +85°C) - Low glitch energy: Minimizes unwanted transient voltages during output changes

Package: The DAC7801LU is available in a small form factor, 8-pin SOIC (Small Outline Integrated Circuit) package. This package offers ease of integration into various circuit designs and provides reliable performance.

Essence: The DAC7801LU is the core component responsible for converting digital signals into precise analog voltages. It enables accurate control of analog outputs in a wide range of applications.

Packaging/Quantity: The DAC7801LU is typically sold in reels containing 250 units per reel.

Specifications

• Resolution: 12 bits
• Supply Voltage Range: 2.7V to 5.5V
• Reference Voltage Range: 0V to Vcc
• Integral Nonlinearity (INL): ±1 LSB (max)
• Differential Nonlinearity (DNL): ±1 LSB (max)
• Settling Time: 10 µs (max)
• Power Consumption: 0.5 mA (typ)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The DAC7801LU has the following pin configuration:

1. Vout: Analog voltage output
2. AGND: Analog ground
3. Vref: Reference voltage input
4. CS: Chip select input
5. DIN: Serial data input
6. SCLK: Serial clock input
7. GND: Ground
8. Vcc: Supply voltage input

Functional Features

• High-resolution digital-to-analog conversion
• Low power consumption for energy-efficient operation
• Fast settling time for rapid response in dynamic applications
• Wide operating temperature range for reliable performance in harsh environments
• Low glitch energy to minimize unwanted transient voltages during output changes

Advantages and Disadvantages

Advantages: - High resolution enables precise analog output generation - Low power consumption prolongs battery life in portable devices - Fast settling time allows for quick response in time-critical applications - Wide operating temperature range ensures reliable operation in various environments - Low glitch energy reduces unwanted noise in the analog output signal

Disadvantages: - Limited to voltage output only, not suitable for current output applications - Requires an external reference voltage source for accurate conversion

Working Principles

The DAC7801LU utilizes a digital-to-analog conversion technique called pulse-width modulation (PWM). It converts the incoming digital data into a corresponding analog voltage by rapidly switching the output between two voltage levels. The ratio of the on-time to the total switching period determines the average output voltage, which represents the digital input value.

Detailed Application Field Plans

The DAC7801LU finds extensive application in various fields, including: 1. Industrial Control Systems: Provides precise analog control signals for motor speed control, valve positioning, and process control. 2. Data Acquisition Systems: Enables accurate conversion of digital sensor readings into analog signals for further processing and analysis. 3. Instrumentation: Used in test and measurement equipment to generate precise analog waveforms for signal generation and calibration.

Detailed and Complete Alternative Models

1. DAC7800LU: Similar to the DAC7801LU, but with 10-bit resolution instead of 12 bits.
2. DAC7811LU: Offers improved performance with 14-bit resolution and lower integral nonlinearity.
3. DAC7822LU: Provides dual-channel capability with two independent 12-bit digital-to-analog converters in a single package.

These alternative models offer different resolutions and additional features to cater to specific application requirements.

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