MAX321ESA+

Switch Time (Ton, Toff) (Max):	150ns, 100ns
Base Part Number:	MAX321
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Operating Temperature:	-40°C ~ 85°C (TA)
Crosstalk:	-85dB @ 1MHz
Current - Leakage (IS(off)) (Max):	100pA
Channel Capacitance (CS(off), CD(off)):	9pF, 9pF
Charge Injection:	2pC
-3db Bandwidth:	--
Series:	--
Voltage - Supply, Dual (V±):	±2.7 V ~ 8 V
Voltage - Supply, Single (V+):	--
Channel-to-Channel Matching (ΔRon):	300 mOhm
On-State Resistance (Max):	35 Ohm
Number of Circuits:	2
Multiplexer/Demultiplexer Circuit:	1:1
Switch Circuit:	SPST - NC
Part Status:	Active
Packaging:	Tube

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Introduction: The MAX321ESA+

The MAX321ESA+ is an interface Analog Switches, Multiplexers, Demultiplexers supplied by Texas Instruments. It is a 16-channel multiplexer that has two 8–channel banks of switches that offer 0.45Ω on-resistance and low distortion, ensuring low crosstalk between multiplexed signals. The high speed of this switch makes it ideal for signals in the audio range, making it an excellent choice for many applications.

Application Fields

The MAX321ESA+ switch is ideal for applications that require a low-power, low distortion switch to multiplex signals in the audio range. It is well-suited for automotive infotainment systems and mobile platforms that need to switch high-resolution signals. The switch can be used to create system-on-chip interconnects and high-resolution audio designs that need to reduce the number of wires while still maintaining signal integrity. It is also a popular choice for radio-frequency signal routing. In addition, the switch can be used to switch between multiple sensors in consumer applications, such as smart phones and toys. The MAX321ESA+ is a great choice for applications such as digital audio, consumer, computing, instrumentation, medical, and automotive electronics.

Working Principle

The MAX321ESA+ switch is a CMOS device that provides high-speed switching performance. The device operates from a wide supply voltage range, from 4.25V to 18V.The switch has two 8-channel banks, each of which has two analog switches. A logic-controlled register is used to select the appropriate switch. Each switch is controlled with two bits, D0 and D1. The switch is enabled or disabled when a logic ‘1’ is sent to the corresponding bit. When both bits are set to ‘0’, the switch is disabled. The MAX321ESA+ switch can also be used in a special mode called ‘analog pass-through’, which bypasses all of the analog components in the signal path and allows the signal to pass through the switch unaltered. This mode is controlled with the ENABLE pin. The switch also has an integrated voltage-controlled attenuator that can be used to reduce the signal amplitude in applications where the signal is too high. The switch can also be used as a multiplexer/demultiplexer with two separate 8-channel banks and dual control pins, allowing the user to easily switch between two different sets of signals.

Conclusion

The MAX321ESA+ is an ideal choice for a wide range of applications that require a low-power, low-distortion switch to multiplex signals in the audio range. The switch provides a high-speed switching operation, wide supply voltage range, and integrated voltage-controlled attenuator. It also has a special analog pass-through mode, as well as the ability to be used as a multiplexer/demultiplexer. With its flexible design and performance, the MAX321ESA+ is sure to be a popular choice for many applications.

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