ICL7135CPIZ

Product Overview

Category: Integrated Circuit (IC)

Use: The ICL7135CPIZ is a high-precision, low-power, 4.5-digit analog-to-digital converter (ADC) designed for use in various measurement and instrumentation applications.

Characteristics: - High precision: The ICL7135CPIZ offers exceptional accuracy with its 4.5-digit resolution, making it suitable for demanding measurement tasks. - Low power consumption: This IC is designed to operate on low power, making it ideal for battery-powered devices or applications where power efficiency is crucial. - Versatile package: The ICL7135CPIZ comes in a compact and industry-standard DIP package, allowing for easy integration into existing circuit designs. - Essential features: It includes built-in multiplexed BCD display drivers, reference voltage source, and a clock generator, reducing the need for additional components. - Packaging/Quantity: The ICL7135CPIZ is typically available in tape and reel packaging, with a quantity of 250 units per reel.

Specifications

• Resolution: 4.5 digits
• Conversion Time: 100ms
• Reference Voltage: 2.5V
• Operating Voltage Range: ±3V to ±18V
• Input Voltage Range: ±200mV to ±10V
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The ICL7135CPIZ has a total of 40 pins, which are assigned specific functions as follows:

1. V+ (Positive Power Supply)
2. V- (Negative Power Supply)
3. REF HI (Reference Voltage High)
4. REF LO (Reference Voltage Low)
5. IN HI (Input Voltage High)
6. IN LO (Input Voltage Low)
7. AGND (Analog Ground)
8. DGND (Digital Ground)
9. CLK IN (Clock Input)
10. CLK OUT (Clock Output)
11. STBY (Standby Mode Control)
12. INT/EXT (Internal/External Clock Selection)
13. A/D START (ADC Start Conversion)
14. BUSY (Conversion in Progress) 15-22. D0-D7 (Data Outputs) 23-30. SEG A-H (Seven-Segment Display Outputs) 31-34. COM 1-4 (Common Terminal for Seven-Segment Display) 35-40. NC (No Connection)

Functional Features

The ICL7135CPIZ offers several functional features that enhance its performance and usability:

1. High accuracy: With its 4.5-digit resolution, the IC provides precise measurement results.
2. Multiplexed BCD display drivers: The built-in drivers simplify the implementation of a seven-segment display, reducing external circuitry requirements.
3. Reference voltage source: The integrated reference voltage source ensures stable and accurate measurements.
4. Low power consumption: The IC operates on low power, making it suitable for battery-powered applications.
5. Standby mode: The standby mode allows for power-saving when the IC is not actively converting.

Advantages and Disadvantages

Advantages: - High precision and accuracy - Low power consumption - Compact package for easy integration - Built-in display drivers and reference voltage source reduce external components

Disadvantages: - Limited input voltage range compared to some other ADCs - Requires additional external components for signal conditioning in certain applications

Working Principles

The ICL7135CPIZ utilizes a successive approximation technique to convert analog signals into digital values. It employs an internal clock generator to control the conversion process. The input voltage is compared against a reference voltage, and the converter iteratively adjusts the digital output until the conversion is complete.

Application Field Plans

The ICL7135CPIZ finds applications in various fields, including: - Digital multimeters - Data acquisition systems - Process control instruments - Temperature and humidity measurement devices - Power monitoring equipment

Alternative Models

For those seeking alternative options, the following models offer similar functionality to the ICL7135CPIZ: - AD7793 from Analog Devices - MAX11645 from Maxim Integrated - LTC2400 from Linear Technology

These alternatives provide comparable precision, low power consumption, and versatile packaging options.

In conclusion, the ICL7135CPIZ is a high-precision, low-power ADC that offers exceptional accuracy and versatility. Its compact package, built-in features, and wide range of applications make it a popular choice for measurement and instrumentation needs.