ADV3221ARZ

Switch Time (Ton, Toff) (Max):	--
Base Part Number:	ADV3221
Supplier Device Package:	16-SOIC
Package / Case:	16-SOIC (0.154", 3.90mm Width)
Operating Temperature:	-40°C ~ 85°C (TA)
Crosstalk:	-87dB @ 100MHz
Current - Leakage (IS(off)) (Max):	2µA (Typ)
Channel Capacitance (CS(off), CD(off)):	1.8pF
Charge Injection:	--
-3db Bandwidth:	1GHz
Series:	--
Voltage - Supply, Dual (V±):	±4.5 V ~ 5.5 V
Voltage - Supply, Single (V+):	--
Channel-to-Channel Matching (ΔRon):	--
On-State Resistance (Max):	--
Number of Circuits:	1
Multiplexer/Demultiplexer Circuit:	4:1
Switch Circuit:	SP4T
Part Status:	Active
Packaging:	Tube

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ADV3221ARZ Application Field and Working Principle

Introduction

The ADV3221ARZ is an analog switch, multiplexer, and demultiplexer integrated circuit designed by Analog Devices Inc (ADI). It features high performance, low distortion, and low cost. The IC is designed for switched-capacitor filters, sample-and-hold circuits, calibration circuits, and audio circuit applications. It is a single-channel multiplexer and demultiplexer device with two differential-input 16-position single-ended output switches. It also includes a low-noise amplifier stage, providing low quiescent current, fast switching time and low power consumption.

Architecture and Features

The ADV3221ARZ contains two independent differential input switches with 6-bit digital control, 17 unique fixed reference voltages, and an output buffer amplifier with 4-bit control. A high resolution voltage reference generator is also included. This allows the reference voltage and output stage control to be digitally controlled. The control and reference voltages are multiplexed and then routed to the 16-position switch. The multiplexer has a 1 VFS (full-scale) loop and a 10 VFS loop with a common voltage reference. Furthermore, the device features and Input Signal Range of 0 V to 8 V and an output signal range of 2 V to 16 V.

Functional Description

The ADV3221ARZ functions as a switched-capacitor filter, sample-and-hold circuit, calibration circuit, signal generator, audio amplifier, and more. Its low-noise amplifier stage provides low quiescent current for low power consumption and fast switching time. When switched, the signal is sampled and the reference voltage is briefly supplied to the switch. The output stage operates in either the direct or inverting feedback loop. In the direct feedback configuration, the reference voltage is applied to the input and the output voltage is the voltage across the reference capacitor. In the inverting configuration, the reference voltage is applied to the output and the output voltage is the voltage across the switching element.The ADV3221ARZ includes a wide range of features which are beneficial for use in switched-capacitor filter, sample-and-hold, and calibration applications. These features include low distortion for audio applications, extended voltage range for higher-gain applications, and protection from static discharge. Furthermore, the low quiescent current design provides low power consumption for lower-gain applications.

Conclusion

The ADV3221ARZ is an analog switch, multiplexer, and demultiplexer integrated circuit designed by Analog Devices Inc (ADI). It offers high performance, low distortion, and low cost, making it well-suited for applications such as switched-capacitor filter, sample-and-hold, and calibration applications. The device features differential-input 16-position single-ended output switches, a low-noise amplifier stage, a wide range of features, and extended voltage range capabilities. Furthermore, the low quiescent current design ensures low power consumption and fast switching time.

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