AD7779ACPZ

Number of A/D Converters:	8
Base Part Number:	AD7779
Supplier Device Package:	64-LFCSP (9x9)
Package / Case:	64-WFQFN Exposed Pad, CSP
Operating Temperature:	-40°C ~ 125°C
Features:	Simultaneous Sampling
Voltage - Supply, Digital:	--
Voltage - Supply, Analog:	±1.65V, 2.2 V ~ 3.6 V
Reference Type:	External, Internal
Architecture:	Sigma-Delta
Series:	--
Ratio - S/H:ADC:	--
Configuration:	PGA-ADC
Data Interface:	Serial
Input Type:	Differential, Single Ended
Number of Inputs:	8
Sampling Rate (Per Second):	16k
Number of Bits:	24
Part Status:	Active
Packaging:	Tray

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Introduction

Analog-to-digital converters (ADCs) are a type of data acquisition component that convert analog signals into digital signals for use in digital systems. The AD7779ACPZ is a low-cost, low-power ADC that utilizes a triple-channel, 24-bit sigma delta architecture. This component has a wide range of applications, including medical imaging, automotive, industrial, audio, and communication systems.

Features and Specifications

The AD7779ACPZ is a triple-channel, 24-bit sigma delta architecture for single-ended or fully differential signals. The component provides a dynamic range of up to 93 dB SNR (signal-to-noise ratio) and a maximum sample rate of 512 kSPS (512,000 samples per second). The component includes an onboard voltage reference and temperature sensor. It also includes an analog input buffer circuit to reduce the noise coupling from the system. The component has an integrated voltage reference and temperature sensor and can support analog input voltages ranging from -2.0 VDC to +2.0 VDC.

Application and Working Principles

The AD7779ACPZ is ideal for a variety of applications, including medical imaging, automotive, industrial, audio, and communication systems. It can be used for signal acquisition in water flow, pressure, temperature, and other sensor measurements. The ADC also finds application in audio systems for digital signal processing and signal generation.The AD7779ACPZ uses sigma delta principles to convert the analog signal into a digital one. The conversion is done in two steps – first, the signal is converted into an oversampled digital signal by an analog-to-digital converter and then downsampled to the desired sample rate by a digital signal processing block.The oversampling conversion is performed by a sigma-delta modulator, which contains a digital filter, an adder, and a quantizer. The filter blocks undesired signals and the adder combines the signals into a single sample. The quantizer then reduces the signal into a discrete-time signal by mapping the output of the modulator to a finite set of digital values, thus creating a digital bitstream. The digital signal processor (DSP) then performs the downsampling to create the final output signal.

Conclusion

The AD7779ACPZ is a low-cost, low-power ADC that can be used in medical imaging, automotive, industrial, audio, and communication systems. It uses a triple-channel, 24-bit sigma delta architecture for single-ended or fully differential signals. The component provides a dynamic range of up to 93 dB SNR and a maximum sample rate of 512 kSPS. It has an integrated voltage reference and temperature sensor and can support analog input voltages ranging from -2.0 VDC to +2.0 VDC. The AD7779ACPZ is suitable for a wide range of applications, including signal acquisition in water flow, pressure, temperature, and other sensor measurements. It can also be used in audio systems for digital signal processing and signal generation.

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