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ICL7149CM44

Manufacturer: HARRIS, HAR, INTERSIL, INTERSIL

33/4 Digit, Autoranging Multimeter

Partnumber Manufacturer Quantity Availability
ICL7149CM44 HARRIS, HAR, INTERSIL, INTERSIL 2152 In Stock

Description and Introduction

33/4 Digit, Autoranging Multimeter The ICL7149CM44 is a 4½-digit analog-to-digital converter (ADC) manufactured by Harris Semiconductor. Below are the specifications, descriptions, and features based on the available knowledge base:

### **Specifications:**  
- **Manufacturer:** Harris Semiconductor  
- **Part Number:** ICL7149CM44  
- **Type:** 4½-Digit ADC  
- **Package:** 44-Pin Ceramic Leaded Chip Carrier (CLCC)  
- **Resolution:** 4½ digits (20,000 counts)  
- **Input Voltage Range:** ±200mV (typical)  
- **Reference Voltage:** Internal or external selectable  
- **Conversion Rate:** Up to 3 conversions per second  
- **Supply Voltage:** ±5V (dual supply)  
- **Operating Temperature Range:** Commercial (0°C to +70°C)  
- **Technology:** CMOS  

### **Descriptions:**  
- The ICL7149CM44 is a high-precision, low-power ADC designed for digital panel meters and measurement applications.  
- It integrates a 4½-digit display driver, eliminating the need for external multiplexing circuitry.  
- The device supports auto-zeroing and auto-polarity functions for improved accuracy.  
- It includes an internal voltage reference but can also accept an external reference for flexibility.  

### **Features:**  
- **4½-Digit Resolution:** Provides 20,000-count measurement capability.  
- **Low Power Consumption:** Optimized for battery-powered applications.  
- **On-Chip Display Driver:** Directly drives LCD or LED displays.  
- **Auto-Zeroing:** Reduces offset errors for improved accuracy.  
- **Auto-Polarity:** Automatically detects and displays positive or negative input voltages.  
- **Internal Reference:** Includes a stable 3V reference (external reference option available).  
- **CMOS Technology:** Ensures low power and high noise immunity.  
- **Overrange Indication:** Alerts when input exceeds full-scale range.  

This information is strictly based on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

33/4 Digit, Autoranging Multimeter

Alternative Part Number

  • ICL7135CPI --: Same ICL71xx family of 4.5-digit ADC/driver ICs with similar pinout and function, widely available as a direct functional substitute.
  • TC7109CPL --: Comparable 12-bit integrating ADC with display drive capability, suitable replacement when the original ICL7149 is unavailable.
  • ICL7107CPL --: Popular 3.5-digit ADC with LED display drivers, same ICL71xx lineage and often used as a drop-in substitute in similar display applications.
  • TC7107CPL --: Pin-compatible 3.5-digit LED display A/D converter in the classic 7107 family, a common drop-in style replacement for legacy ICL71xx display drivers.
  • MAX138CPL --: 3.5-digit ADC with on-chip display drivers, a well-known second-source alternative for obsolete ICL71xx display converter designs.
  • ICL7109CPL --: Direct functional equivalent from the original ICL7109 family, offering the same 12-bit integrating ADC performance.
  • AD7550JN --: Comparable 12-bit integrating ADC with similar resolution and interface, suitable as a functional substitute.

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