ICL7135CQI+T

Product Overview

Category

The ICL7135CQI+T belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used in precision analog-to-digital converters (ADCs) and digital panel meters.

Characteristics

• High accuracy: The ICL7135CQI+T offers high-resolution measurement capabilities, making it suitable for applications requiring precise measurements.
• Low power consumption: This IC is designed to operate with low power consumption, making it energy-efficient.
• Wide operating voltage range: It can operate within a wide voltage range, allowing flexibility in various applications.
• Temperature stability: The ICL7135CQI+T exhibits excellent temperature stability, ensuring accurate measurements across different temperature conditions.

Package

The ICL7135CQI+T is available in a compact 40-pin plastic quad flat package (PQFP), which facilitates easy integration into electronic devices.

Essence

The essence of the ICL7135CQI+T lies in its ability to convert analog signals into digital data with high precision and accuracy.

Packaging/Quantity

This IC is typically packaged in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Resolution: 3.5 digits
• Conversion rate: Up to 20 conversions per second
• Reference voltage: 2.5V
• Operating voltage range: 4.5V to 6.5V
• Input voltage range: ±200mV
• Operating temperature range: -40°C to +85°C

Detailed Pin Configuration

The ICL7135CQI+T features a total of 40 pins, each serving a specific function. The pin configuration is as follows:

1. VREF-
2. VREF+
3. IN1
4. IN2
5. IN3
6. IN4
7. IN5
8. IN6
9. IN7
10. IN8
11. IN9
12. IN10
13. IN11
14. IN12
15. IN13
16. IN14
17. IN15
18. IN16
19. IN17
20. IN18
21. IN19
22. IN20
23. IN21
24. IN22
25. IN23
26. IN24
27. IN25
28. IN26
29. IN27
30. IN28
31. IN29
32. IN30
33. IN31
34. IN32
35. VREFOUT
36. AGND
37. DGND
38. CLK
39. CS
40. WR

Functional Features

The ICL7135CQI+T offers the following functional features:

• High-resolution ADC: It provides accurate conversion of analog signals into digital data with a resolution of 3.5 digits.
• Multiplexed inputs: The IC supports multiplexed input channels, allowing for the measurement of multiple analog signals.
• Internal reference voltage: It incorporates an internal reference voltage source (VREF) for precise measurements.
• Serial interface: The IC features a serial interface for easy communication with microcontrollers or other digital devices.

Advantages and Disadvantages

Advantages

• High accuracy and resolution
• Low power consumption
• Wide operating voltage range
• Excellent temperature stability
• Compact package size for easy integration

Disadvantages

• Limited number of input channels
• Requires external components for complete functionality

Working Principles

The ICL7135CQI+T operates based on the successive approximation method. It converts analog input signals into digital data by comparing the input voltage with a reference voltage and iteratively adjusting the conversion process until the desired accuracy is achieved. The converted digital data can then be further processed or displayed.

Detailed Application Field Plans

The ICL7135CQI+T finds applications in various fields, including:

1. Digital panel meters: It is commonly used in digital panel meters to accurately measure and display analog quantities such as voltage, current, temperature, etc.
2. Industrial automation: The IC can be employed in industrial automation systems for precise measurement and control of analog signals.
3. Medical equipment: It finds use in medical devices where accurate measurements are crucial, such as patient monitoring systems and diagnostic instruments.
4. Test and measurement instruments: The ICL7135CQI+T is suitable for test and measurement instruments that require high-resolution ADCs for accurate data acquisition.

Detailed and Complete Alternative Models

• MAX11646
• LTC2400
• ADS1115
• MCP3424
• AD7791

These alternative models offer similar functionality and can be considered as alternatives to the ICL7135CQI