ADC0834CCWM

Number of A/D Converters:	1
Base Part Number:	ADC0834
Supplier Device Package:	14-SOIC
Package / Case:	14-SOIC (0.295", 7.50mm Width)
Operating Temperature:	0°C ~ 70°C
Features:	--
Voltage - Supply, Digital:	4.5 V ~ 6.3 V
Voltage - Supply, Analog:	4.5 V ~ 6.3 V
Reference Type:	External
Architecture:	SAR
Series:	--
Ratio - S/H:ADC:	--
Configuration:	MUX-ADC
Data Interface:	SPI
Input Type:	Differential, Pseudo-Differential, Single Ended
Number of Inputs:	2, 4
Sampling Rate (Per Second):	31.25k
Number of Bits:	8
Part Status:	Obsolete
Packaging:	Tube

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Introduction

Analog to Digital Converters (ADC) are crucial components in embedded systems that collect and process analog signal data. Among the range of converters available on the market, the ADC0834CCWM is worth noting for its advanced features and ease of use. This chip, created by Texas Instruments, is a successive approximation 8-bit analog-to- digital converter (ADC). It is capable of converting analog signal inputs into digital output data in 8-bit words, with a maximum sampling rate of 152.6 kHz.

Application fields

The ADC0834CCWM is very versatile and has a wide range of applications. It is suitable for applications in consumer electronics, telecommunications, and automotive. Common applications include digital audio and video, temperature and pressure sensing, and digital panel meters. It is especially useful in audio/video encoding, data acquisition systems and other digital processing applications due to its high sampling rate.

Features

The ADC0834CCWM is designed to be user-friendly, and offers a number of features to make life easier for designers. The chip is very low-power, drawing a mere 2 mA when active and only 0.1μA when in Standby mode. It is capable of interfacing easily with analog signal inputs, and has a proprietary Buffer Amplifier circuit to ensure stable analog performance. In addition, the ADC0834CCWM is characterized by its low-voltage operation of 2.5V (Only 0.5V external reference source), so it is compatible with a variety of power sources.

Working principle

The ADC0834CCWM is an internally-clocked, successive approximation analog-to-digital converter. It is an 8-bit ADC that converts an analog input signal ranging from 0V to VREF into an 8-bit digital representation. First, the analog voltage is buffered by the Buffer Amplifier circuit, which amplifies the signal whilst running it through a low-pass filter to reject unwanted noise. Then, the signal is sampled and stored in the input register. The comparator module then compares the stored analog voltage to the internally provided reference voltage. The timing module generates successive control signals which allow the input register to step through the successive sampling operation. Once the input register reaches its target value, the magnitude of the analog voltage is determined and can be read by the microcontroller. Depending on the reference voltage, the analog voltage is then converted into the appropriate 8-bit words.

Conclusion

The ADC0834CCWM is an 8-bit ADC with a maximum sampling rate of 152.6 kHz. It is low-power and provides a wealth of features to make design easier. It is ideal for applications ranging from consumer electronics to automotive due to its easy interfacing and extended features. This chip is perfect for encoding audio/video signals, and digital processing. With its successively approximation sampling system and Buffer Amplifier circuit, the ADC0834CCWM is an ideal choice for those needing an efficient and powerful ADC.

Acknowledgements

I would like to thank Texas Instruments for providing information about the ADC0834CCWM, and for creating an easy to use and powerful ADC.

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