MAX4051CPE

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Introduction

Analog switches, multiplexers and demultiplexers are important analog wiring tools for signal transmission and signal feeding in the fields of automation, instrumentation, and telecommunications. The MAX4051CPE is a monolithic CMOS device containing four SPST switches for signal multiplexing, demultiplexing, and other signal routing applications. This device is particularly useful in SAM/SAR ADCs (Successive Approximation/Successive Approximation Register) where a multiplexer is needed to connect the sequences of multiple inputs in sequence to the SAR ADC. This article primarily discusses the application field and working principle of the MAX4051CPE.

Application Field of MAX4051CPE

The MAX4051CPE is a analog multiplexer/switch with 4 SPDT (Single Pole Double Throw) switches. It is suitable for demanding applications because of its wide operating voltage range from 0.8V to 18V. Its features include low ON and OFF Capacitance (1pF typ), low leakage current (20nA at -40°C to 85°C), and low insertion loss. In addition, it is designed with a low power CMOS process, hence it consumed only 10uA of power in standby mode. These features make MAX4051CPE a popular device among many application fields. It is widely used in 4-to-1 multiplexing applications like buffered data selection and serial data selection. It can also be used in 1-to-4 demultiplexing and 4-to-1 analog multiplexing applications. Besides that, it can be used in multiplexing schemes of other interfaces such as I2C, ADC samples and other control line applications.MAN4051CPE can also be used in simple on/off switching applications, SPDT/DPDT conversion and other signal routing applications.

Working Principle of MAX4051CPE

The MAX4051CPE features four SPDT CMOS switches, each with a one side connected to one of the four input pins, and the other side connected to the two output pins. When the SELx (x=0 to 3) control pin is set to low, the corresponding switch is enabled, connecting the appropriate one of the input pins to the output pins. When the SELx is set to high, the switch is disabled and the connection between the input pins and the output pins are turned off.The MAX4051CPE inputs are monolithic multiplexers built on the low power CMOS process and designed to operate from 0.8V to 18V. It operates on a single supply, and the SELx control pins accept both TTL and CMOS levels. The MAX4051CPE offers an adjustable analog range of input signals, a low switching noise (20 mV/μs) and a high CMRR (Common Mode Rejection Ratio) of 100dB. It also features low off-isolation of -60dB.

Conclusion

In conclusion, the MAX4051CPE is a four SPDT analog switch suitable for a wide variety of applications. It operates on a single supply, and its features include low ON and OFF Capacitance, low leakage current and low insertion loss. It can be used for multiplexing and demultiplexing tasks and is also suitable for simple on/off switching or SPDT/DPDT conversion. Its inputs are monolithic multiplexers designed to operate from 0.8V to 18V with low switching noise and a high CMRR.

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