ICL7126CQH-D

Series:	--
Packaging:	Tube
Part Status:	Obsolete
Type:	Display Driver
Number of Channels:	1
Resolution (Bits):	3.5 Digit
Sampling Rate (Per Second):	--
Data Interface:	--
Voltage Supply Source:	Single Supply
Voltage - Supply:	9V
Operating Temperature:	0°C ~ 70°C
Mounting Type:	--
Package / Case:	44-LCC (J-Lead)
Supplier Device Package:	44-PLCC (16.59x16.59)
Base Part Number:	ICL7126

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Introduction

The ICL7126CQH-D is a 14-bit, voltage-output, successive approximation register (SAR) type analog-to-digital converter (ADC). It is the perfect companion for microcontrollers when precise analog measurements are required. It can work with either single-ended or differential input sources, converting a wide range of input voltages into a digital code that can be read by the microcontroller over a standard parallel port.

Application Fields and Working Principle

The ICL7126CQH-D is a common ADC used in many different applications, from medical and aerospace industry to consumer applications like remote sensing and data acquisition. The ADC can convert a wide range of input voltages, stretching from 0-2.4V for single-ended input sources and 0-4.0V for differential input sources.The ICL7126CQH-D ADC has a successive approximation register (SAR) architecture. This means that it works by gradually increasing the size of the digital code until the analog input is approximated. To sample the analog input, the SAR first performs an initial comparison, between the input voltage and a preset reference voltage. Based on this initial comparison, the SAR then proceeds to refine its digital approximation with subsequent comparisons, using either a binary or decimal scale to decide which bits are to be set. This process is repeated until the output digital code matches the input voltage.

Noise Immunity and Low Power Consumption

The ICL7126CQH-D ADC features high-speed operation, with a maximum sample rate of 2MS/s, and low power consumption of only 400mW. It also offers excellent noise immunity, with its on-chip programmable digital noise filters and over-voltage protection. With its low power consumption and noise immunity, the ICL7126CQH-D is ideal for embedded systems where power consumption and noise immunity are important criteria.

Accuracy and Performance

The ICL7126CQH-D ADC offers high accuracy, with a typical differential nonlinearity (DNL) of 0.8LSB and a typical integral nonlinearity (INL) of 0.5LSB. It also offers high resolution, with a resolution of 14 bits. In addition, it has a hold feature that can be used to latch the last converted data, allowing the ADC to hold the value without having to constantly sample and process new data.The ICL7126CQH-D ADC also offers excellent performance in terms of temperature, with an operational temperature range of -40°C to +105°C. This wide temperature range makes the ADC ideal for use in extreme environments.

Conclusion

The ICL7126CQH-D is a high-speed, high-resolution, and low-power ADC. It is designed for use in medical and aerospace applications, as well as consumer applications such as remote sensing and data acquisition. It features a SAR architecture, with excellent noise immunity and high accuracy. It also offers a wide temperature range, making it ideal for use in extreme environments.

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