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ICL7149CM44

33/4 Digit, Autoranging Multimeter

Partnumber Manufacturer Quantity Availability
ICL7149CM44 840 In Stock

Description and Introduction

33/4 Digit, Autoranging Multimeter The ICL7149CM44 is a high-performance, 3.5-digit analog-to-digital converter (ADC) manufactured by Intersil (now Renesas Electronics). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Manufacturer:**  
Intersil (now part of Renesas Electronics)  

### **Description:**  
The ICL7149CM44 is a precision 3.5-digit ADC designed for digital panel meters and measurement applications. It integrates a dual-slope converter with auto-zeroing, polarity detection, and a multiplexed 7-segment display driver.  

### **Key Features:**  
- **Resolution:** 3.5 digits (1999 counts)  
- **Input Voltage Range:** ±200mV (full-scale)  
- **Conversion Rate:** ~3 readings per second  
- **Auto-Zeroing:** Eliminates offset errors  
- **Polarity Indication:** Automatic positive/negative detection  
- **Low Power Consumption:** Suitable for battery-powered applications  
- **On-Chip Display Drivers:** Directly drives multiplexed 7-segment LED/LCD displays  
- **Reference Voltage:** Requires external reference (typically 100mV or 1V)  
- **Package:** 44-pin PLCC (Plastic Leaded Chip Carrier)  

### **Applications:**  
- Digital multimeters  
- Panel meters  
- Process control instruments  
- Portable measurement devices  

This information is based solely 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.
Partnumber Manufacturer Quantity Availability
ICL7149CM44 HARRIS 845 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 A/D converters from the original Harris/Intersil lineage, widely available and functionally similar for display-type measurement 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.
Partnumber Manufacturer Quantity Availability
ICL7149CM44 HAR 409 In Stock

Description and Introduction

33/4 Digit, Autoranging Multimeter The ICL7149CM44 is a 3½ digit A/D converter manufactured by Harris Semiconductor (now part of Intersil).  

### **Specifications:**  
- **Resolution:** 3½ digits (2000 counts)  
- **Input Voltage Range:** ±200mV or ±2V (selectable)  
- **Conversion Rate:** ~3 readings per second  
- **Supply Voltage:** Typically ±5V  
- **Power Consumption:** Low power CMOS design  
- **Package:** 44-pin PLCC (Plastic Leaded Chip Carrier)  

### **Descriptions & Features:**  
- **Auto-Zeroing:** Ensures accuracy by eliminating offset errors.  
- **True Differential Input:** Reduces noise and improves common-mode rejection.  
- **On-Chip Reference:** Includes a built-in voltage reference for simplified design.  
- **Direct LCD Drive:** Designed to interface directly with LCD displays.  
- **Low Noise:** Suitable for precision measurement applications.  
- **Overrange Indication:** Provides indication when input exceeds full scale.  

This IC is commonly used in digital panel meters, portable instruments, and other measurement systems requiring high accuracy and low power consumption.

Application Scenarios & Design Considerations

33/4 Digit, Autoranging Multimeter

Alternative Part Number

  • TC7109CPL --: Pin-compatible 12-bit CMOS ADC with similar architecture and function, widely available and well documented.
  • 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.
Partnumber Manufacturer Quantity Availability
ICL7149CM44 INTERSIL 44 In Stock

Description and Introduction

33/4 Digit, Autoranging Multimeter The ICL7149CM44 is a product from **INTERSIL**, which is now part of **Renesas Electronics Corporation** after its acquisition.  

### **Specifications:**  
- **Manufacturer:** INTERSIL (now Renesas Electronics)  
- **Part Number:** ICL7149CM44  
- **Package:** 44-pin Ceramic Leadless Chip Carrier (CLCC)  
- **Type:** Precision Analog-to-Digital Converter (ADC) with LCD Driver  
- **Resolution:** 3½ digits (2000 counts)  
- **Input Voltage Range:** ±200mV or ±2V (selectable)  
- **Reference Voltage:** Internal or external reference option  
- **Power Supply:** Typically ±5V  
- **Display Output:** Direct LCD drive capability  
- **Low Power Consumption:** Suitable for battery-powered applications  
- **Auto-Zeroing:** Reduces offset and drift errors  

### **Descriptions and Features:**  
- The ICL7149CM44 is a **high-precision, low-power** ADC designed for digital panel meters and measurement applications.  
- It integrates a **dual-slope converter** for high accuracy and noise rejection.  
- Includes an **on-chip LCD driver**, eliminating the need for external display drivers.  
- Features **auto-polarity and auto-zeroing** for improved measurement stability.  
- Designed for **low-power operation**, making it ideal for portable instruments.  
- Operates over a **wide temperature range**, ensuring reliability in industrial environments.  

For exact electrical characteristics and application details, refer to the original **INTERSIL datasheet** (now available under Renesas documentation).

Application Scenarios & Design Considerations

33/4 Digit, Autoranging Multimeter

Alternative Part Number

  • TC7109CPL --: Pin-compatible 12-bit integrating ADC with similar functionality and a different series prefix, making it a strong drop-in candidate.
  • ICL7109CPL --: Same 12-bit integrating ADC family from the original manufacturer with comparable specifications, though the naming differs from the source.
  • AD7550JN --: Alternative 12-bit integrating ADC from a different vendor with similar resolution and conversion architecture for replacement consideration.
Partnumber Manufacturer Quantity Availability
ICL7149CM44 INTERSIL 14 In Stock

Description and Introduction

33/4 Digit, Autoranging Multimeter The ICL7149CM44 is a 3½ digit analog-to-digital converter (ADC) manufactured by **Intersil** (now part of Renesas Electronics). Below are its key specifications, descriptions, and features based on available data:  

### **Specifications:**  
- **Resolution:** 3½ digits (2000 counts)  
- **Input Voltage Range:** ±200mV (adjustable for other ranges)  
- **Supply Voltage:** Typically ±5V (dual supply)  
- **Reference Voltage:** Internal or external (adjustable)  
- **Conversion Rate:** ~3 conversions per second  
- **Display Output:** Drives LCD directly (no external decoder needed)  
- **Operating Temperature Range:** Commercial (0°C to +70°C)  
- **Package:** 44-pin PLCC (Plastic Leaded Chip Carrier)  

### **Descriptions:**  
- The ICL7149CM44 is a **low-power, high-accuracy** ADC designed for digital panel meters and instrumentation.  
- It integrates **auto-zeroing, polarity detection, and LCD drive circuitry**, reducing external component count.  
- Suitable for **battery-powered applications** due to low power consumption.  

### **Features:**  
- **Direct LCD Drive:** Eliminates the need for external decoders.  
- **Auto-Zeroing:** Ensures high accuracy over temperature and time.  
- **Low Power Consumption:** Optimized for portable devices.  
- **On-Chip Reference:** Includes a stable voltage reference (adjustable).  
- **Overrange/Underrange Indication:** Flags out-of-range inputs.  
- **Single-Chip Solution:** Reduces system complexity.  

This information is based on historical Intersil datasheets. For exact details, refer to the official documentation from Renesas (Intersil’s successor).

Application Scenarios & Design Considerations

33/4 Digit, Autoranging Multimeter

Alternative Part Number

  • TC7109CPL --: Pin-compatible 12-bit integrating ADC with similar architecture and function, widely available and well documented.
  • ICL7109CPL --: Direct functional equivalent from the same original product family, offering the same ADC resolution and interface.
  • AD7550JN --: Comparable high-resolution integrating ADC with similar performance characteristics, suitable as a functional substitute.

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