Switch Time (Ton, Toff) (Max):	80ns, 30ns
Base Part Number:	MAX4521
Supplier Device Package:	16-QSOP
Package / Case:	16-SSOP (0.154", 3.90mm Width)
Operating Temperature:	0°C ~ 70°C (TA)
Crosstalk:	-90dB @ 100kHz
Current - Leakage (IS(off)) (Max):	1nA
Channel Capacitance (CS(off), CD(off)):	2pF, 2pF
Charge Injection:	1pC
-3db Bandwidth:	--
Series:	--
Voltage - Supply, Dual (V±):	±2 V ~ 6 V
Voltage - Supply, Single (V+):	2 V ~ 12 V
Channel-to-Channel Matching (ΔRon):	1 Ohm
On-State Resistance (Max):	100 Ohm
Number of Circuits:	4
Multiplexer/Demultiplexer Circuit:	1:1
Switch Circuit:	SPST - NC
Part Status:	Active
Packaging:	Tape & Reel (TR)

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MAX4521CEE+T Application Field and Working Principle

Introduction

MAX4521CEE+T is a monolithic quad SPST analog switch IC intended for high speed multiplexing applications which is fabricated with advanced CMOS technology. It has four independent analog switches. These channels are grouped as two differential and two single-ended endpoints each having their own common port. MAX4521CEE+T family of devices is suitable for variety of applications such as audio and video switching, filtering and level translation as well as an Active Differential Probe.

General Features

• Quad Switch with Independent Control Input • 40 Ohm On-Resistance Typical • Fast Switching Speed at 2nS • Low Input Power • Low Cost • CMOS Compatible • Interchangeable Functionality • Operating Voltage Range from +/-3 V to +/-20 V • Low Charge Injection • Low Off Isolation

Application Fields

The MAX4521CEE+T is suitable for a wide range of applications, however, the most common applications are found in audio and video systems, level translation, active differential probes, and communications systems.The MAX4521CEE+T is ideal for analog signal switching such as audio source selection, headphone switching and video multiplexer applications, because of its low on-resistance, low power and low cost. The MAX4521CEE+T also can be used in the communication systems as a cross-point switch in data communication equipment and cellular base stations. Its feature of low charge injection makes it well-suited for data switch applications. Level translation is another application for the MAX4521CEE+T. It can be used where the voltage levels must be shifted from low to high, or from high to low. The MAX4521CEE+T is also suitable for active differential probes as it offers low off isolation and low power consumption.

Working Principle

The working principle of the MAX4521CEE+T is based on CMOS technology and uses four independent channels in an open drain architecture. Each channel consists of two pairs of switchess and their respective p-channel and n-channel MOSFETs. The Control Inputs decide whether OFF (G) or ON (S) is the output position of the switch each time. When the control input is low, the nMOSFET will turn ON and the pMOSFET will turn OFF. This will connect the output to its common terminal. When the control input is high, the nMOSFET will turn OFF and the pMOSFET will turn ON, connecting the output to its corresponding switch output. The MAX4521CEE+T is able to switch quickly, because of its low propagation delays and rise/fall times, enabling it to multiplex signals at speeds of up to 2 ns. The MAX4521CEE+T offers low off isolation and low leakage current of up to 1uA.

Conclusion

The MAX4521CEE+T can be used in a variety of applications such as audio and video switching, level translation, communications systems, and active differential probes. It is an ideal choice for fast multiplexing applications with its low on-resistance and fast switching speed. Its feature of low power and low cost makes it a cost-effective solution for many applications.

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