High-voltage analog multiplexers for industrial IoT

October 01, 2020 //By Rich Pell
High-voltage analog multiplexers for industrial IoT
Diodes Incorporated has introduced analog multiplexers that are capable of switching signal voltages of up to 36V in an industrial environment.

The high voltage capability of the PS508 and PS509 analog multiplexers, says the company, will support industrial IoT (IIoT) applications using multiple sensors, including factory automation and process control, battery monitoring systems, and test and measurement equipment. The PS508 offers 8:1 single-ended channels, whereas the PS509 offers differential 4:1 or dual 4:1 single-ended channels.

A single PS509 offers differential 4:1 or dual 4:1 signal-end channels. The PS508 offers an 8:1 ratio for single-ended switching. Address lines are used to select the input/output combination, while an Enable pin disables all switches when low.

The devices feature a low charge injection of 0.9pC, low input and output capacitances (30pF or lower), ensuring there is low distortion on the signals being switched - important for industrial applications where a small change in the sensor signal can impact overall system functionality. In addition, says the company, the devices' low on-resistance of 125 ohms (when the supply voltage is ±15V) and low leakage current will help to prevent signal loss and degradation, reduce the error on output signals, and improve the signal quality for backend ADC analysis.

The devices also feature fast break-before-make switching times of 75ns (30ns minimum), with a transition time of 171ns (310ns maximum), which reduces the propagation time from input to output, supporting real-time applications. The multiplexers operate over the industrial temperature range of -40°C to +125°C from a dual supply voltage between ±5V and ±18V or a single supply voltage between 10V and 36V. The supply current for both devices is only 135µA, making them suitable for portable applications.

The PS509 and PS508 analog multiplexers are available in 16-pin TSSOP(L), QSOP(Q) and SOIC(W) packages. They are priced at $1.20 in 2500 piece quantities.

Diodes Incorporated


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