AD7851ARSZ

Number of A/D Converters:	1
Base Part Number:	AD7851
Supplier Device Package:	24-SSOP
Package / Case:	24-SSOP (0.209", 5.30mm Width)
Operating Temperature:	-40°C ~ 125°C
Features:	--
Voltage - Supply, Digital:	5V
Voltage - Supply, Analog:	5V
Reference Type:	External, Internal
Architecture:	SAR
Series:	--
Ratio - S/H:ADC:	1:1
Configuration:	S/H-ADC
Data Interface:	SPI
Input Type:	Pseudo-Differential
Number of Inputs:	1
Sampling Rate (Per Second):	333k
Number of Bits:	14
Part Status:	Active
Packaging:	Tube

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Introduction

Analog-to-Digital Converters (ADC) are used for a variety of applications. The AD7851ARSZ is a single-supply, low voltage, low-power, fully integrated analog-to-digital converter that offers excellent accuracy, low power consumption, and flexible output formats. This ADC can convert analog input signals into digital data with a resolution of 8-bit to 18-bit and a sampling rate of up to 500ksps.

Application Field

The AD7851ARSZ ADC is used for data acquisition applications. It can be used for a wide range of applications including process control, medical, industrial instrumentation, and consumer products. The AD7851ARSZ is suitable for battery-operated and portable applications, since it only requires a single 3V to 5.5V supply. It also features an onboard voltage reference and digital filter. This makes it ideal for low voltage and low power applications.

Working Principle

The AD7851ARSZ ADC uses the successive approximation register (SAR) optimization technique. The ADC consists of a successive approximation register (SAR), digital filter, and voltage reference block.The successive approximation register generates the digital code that is proportional to the input voltage. The SAR first sets the most significant bit (MSB) based on the comparison of the input voltage with the voltage of the onboard voltage reference. The SAR then cycles through the remaining bits until it reaches the least significant bit (LSB) to produce the final digital code.The digital filter is used to reduce jitter and unwanted noise from the digital output. This is done by filtering out unwanted noise frequencies and passing only wanted frequencies.The on-board voltage reference provides a stable and accurate reference voltage. This is used by the SAR to generate the digital code.

Conclusion

The AD7851ARSZ ADC is a low voltage, low-power, single-supply, fully integrated analog-to-digital converter that offers excellent accuracy and flexible output formats. It is suitable for battery-operated and portable applications, and features an onboard voltage reference and digital filter for low voltage and low power applications. It uses the successive approximation register and digital filter optimization technique to generate the digital code from the input voltage.

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