Maxim Integrated's ICL7135CQI+: Precision 4½ Digit ADC

The ICL7135CQI+ from Maxim Integrated is a high-performance, precision analog-to-digital converter (ADC) that delivers exceptional accuracy and stability. This device is specifically designed to meet the rigorous demands of precision digital voltmeter applications and other instrumentation that requires accurate and reliable digital readings of analog signals.

Featuring a 4½ digit dual-slope integrating ADC, the ICL7135CQI+ provides a direct display drive for a liquid crystal display (LCD), making it an ideal choice for portable instruments. The converter offers a high degree of integration, reducing the need for external components and simplifying the design process for engineers.

Key features of the ICL7135CQI+ include its low noise characteristics, excellent common-mode rejection ratio (CMRR), and true differential inputs. These features contribute to its ability to deliver high-precision measurements even in the presence of noise or when measuring small signals in high common-mode voltage situations.

Specifications:

• Resolution: 4½ digits
• Direct LCD driver: 7-segment decoded outputs
• True differential input and reference
• Low noise: Less than 15µVP-P
• Power supply: Single or dual supply operation
• Integrating ADC architecture: Dual-slope type
• Package: 28-pin PLCC (Plastic Leaded Chip Carrier)

The ICL7135CQI+ operates on a single or dual power supply, providing flexibility for various system designs. Its low power consumption makes it suitable for battery-operated devices. The device comes in a 28-pin PLCC package, which is known for its space-saving footprint and ease of integration into a wide range of electronic systems.

Whether you're developing precision measurement equipment or looking for a reliable ADC for your next project, the ICL7135CQI+ offers the performance and quality that professionals expect from Maxim Integrated. Its combination of accuracy, integration, and ease of use makes it a top choice for designers seeking to enhance the performance of their digital measurement systems.