The ICL7135 is a precision 4½ digit analog-to-digital (A/D) converter designed for high-accuracy measurement applications. It integrates an auto-zero, dual-slope conversion technique to provide accurate and stable readings, ideal for digital voltmeters and other measurement instruments.
Key Features:
- High Accuracy: Provides 4½ digit resolution (±20,000 counts) for precise measurements.
- Auto-Zeroing: Built-in auto-zeroing for reduced offset errors and enhanced accuracy.
- Dual-Slope Conversion: Utilizes dual-slope integration for noise rejection and stable readings.
- Low Power Consumption: Suitable for battery-operated devices.
- Differential Input: Allows for true differential measurements.
- Digital and Analog Sections: Separate power supplies for digital and analog sections to reduce noise.
- Display Interface: Designed to drive 7-segment LED displays directly.
- Package Type: Available in DIP-28 and other packages.
- Resolution: 4½ digits (±20,000 counts)
- Operating Voltage: Typically ±5V for analog section, +5V for digital section
- Input Voltage Range: ±2V (differential input)
- Conversion Rate: Up to 3 readings per second
- Input Impedance: Very high input impedance, typically >100 MΩ
- Operating Temperature Range: 0°C to +70°C
- Digital Voltmeters: Ideal for high-precision digital voltmeter designs.
- Measurement Instruments: Used in various precision measurement and test instruments.
- Data Acquisition Systems: Suitable for high-accuracy data acquisition applications.
- Battery-Powered Devices: Efficient power usage makes it suitable for portable instruments.
- Calibration Equipment: Applied in equipment requiring accurate calibration and measurement.