Analogue multiplexers from Diodes serve IIoT
Two analogue multiplexers from Diodes, the PS508 and PS509, have the ability to switch signal voltages of up to 36V to support industrial IoT applications which use multiple sensors. Typical applications are factory automation, process control, battery monitoring systems and test and measurement equipment.
The PS508 and PS509 provide single-ended or differential configurations. 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 I/O combination, and an ‘enable’ pin disables all switches when low.
A low charge injection of 0.9pC, low input and output capacitances (30pF or lower), contribute to low distortion on the signals being switched. This is important for industrial applications where a small change in the sensor signal can impact overall system functionality, notes Diodes.
The multiplexers operate over the industrial temperature range of -40 to +125 degrees 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 135 microA, for portable applications.
The PS508 and PS509 also have low on resistance of 125Ohm, when the supply voltage is ±15V. In addition, the low leakage current and low charge injection will help to prevent signal loss and degradation, reduce the error on output signals, and improve the signal quality for backend ADC analysis, says Diodes. The multiplexers also feature fast break-before-make switching times of 75 nanoseconds (30 nanoseconds minimum), with a transition time of 171 nanoseconds (310nanoseconds maximum). This reduces the propagation time from input to output, to support real-time applications. The switches also offer low leakage current, which means that they can be used in applications where they are interfacing high impedance sources.
The PS509 and PS508 analogue multiplexers are available in 16-pin TSSOP(L), QSOP(Q) and SOIC(W) packages.
Diodes supplies semiconductor products to customers in the consumer electronics, computing, communications, industrial, and automotive markets. Its portfolio of discrete, analogue, and mixed-signal products and leading-edge packaging technology is coupled with worldwide operations in 28 sites, including engineering, testing, manufacturing, and customer service.
