ICL7135CN

Product Overview

Category: Integrated Circuit (IC)

Use: The ICL7135CN is a precision analog-to-digital converter (ADC) designed for use in various applications that require accurate measurement and conversion of analog signals into digital data. It is commonly used in electronic devices where precise measurements are crucial, such as multimeters, digital voltmeters, and other test and measurement equipment.

Characteristics: - High accuracy: The ICL7135CN offers high-resolution conversion with 4½ digits, providing precise measurement results. - Low power consumption: This IC operates on low power, making it suitable for battery-powered devices. - Wide voltage range: It can handle a wide input voltage range, allowing for versatile applications. - Internal reference: The ICL7135CN includes an internal voltage reference, eliminating the need for an external reference source. - Multiplexed inputs: It features multiplexed analog inputs, enabling the measurement of multiple signals.

Package: The ICL7135CN is available in a standard 40-pin dual in-line package (DIP), which facilitates easy integration into circuit boards.

Essence: The essence of the ICL7135CN lies in its ability to accurately convert analog signals into digital data, providing reliable and precise measurements.

Packaging/Quantity: The ICL7135CN is typically sold in reels or tubes containing multiple units, depending on the supplier. The exact quantity may vary.

Specifications

• Resolution: 4½ digits
• Input Voltage Range: ±200mV to ±20V
• Conversion Time: 100ms per reading
• Reference Voltage: Internal, 2.5V
• Power Supply: ±5V DC
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The ICL7135CN has a total of 40 pins, which are assigned specific functions. The pin configuration is as follows:

Pin 1: Analog Input A Pin 2: Analog Input B Pin 3: Analog Input C ... Pin 38: Digital Output D4 Pin 39: Digital Output D3 Pin 40: Digital Output D2

Please refer to the datasheet for a complete pinout diagram and detailed pin descriptions.

Functional Features

• High-resolution ADC: The ICL7135CN provides accurate conversion of analog signals into digital data with a resolution of 4½ digits.
• Multiplexed inputs: It allows for the measurement of multiple analog signals using a single IC.
• Internal reference: The built-in voltage reference eliminates the need for an external reference source.
• Low power consumption: The IC operates on low power, making it suitable for battery-powered applications.
• Easy integration: The standard DIP package enables easy integration into circuit boards.

Advantages and Disadvantages

Advantages: - High accuracy and resolution - Wide input voltage range - Internal voltage reference - Low power consumption - Versatile applications

Disadvantages: - Limited number of analog inputs - Requires external components for complete functionality

Working Principles

The ICL7135CN utilizes a successive approximation technique to convert analog signals into digital data. It employs an internal voltage reference and a precision comparator to compare the input signal against a known reference voltage. By iteratively adjusting the comparison, the IC determines the digital representation of the analog input.

Detailed Application Field Plans

The ICL7135CN finds extensive use in various applications that require precise analog-to-digital conversion. Some common application fields include: - Multimeters - Digital voltmeters - Data acquisition systems - Process control instrumentation - Industrial automation

Detailed and Complete Alternative Models

• ADC0804
• MAX11645
• LTC2400
• MCP3208
• ADS1115

These alternative models offer similar functionality and can be considered as alternatives to the ICL7135CN based on specific requirements.

In conclusion, the ICL7135CN is a precision analog-to-digital converter that provides high accuracy and resolution. Its versatile applications, low power consumption, and internal voltage reference make it a popular choice in various electronic devices. However, it has limitations in terms of the number of analog inputs and requires external components for complete functionality.