Multimeters are portable allrounders – and the less weight they have, the better, albeit every one of the comprised measuring channels of these multifunctional tools needs to be switched by a separate relay.
Here, Panasonic Industry’s CC series of TSON relays as the miniaturized offspring of the successful Low CxR MOSFET series seem to be the perfect choice, being as compact as 1,8 x 1,95 x 0,8 millimeters.
The considerably low product of C and R of the output transistors is an essential benefit for any kind of multimeter application, as it guarantees a desirably minimized interference with high frequency signals.
Other than the traditional PhotoMOS relays, the galvanic isolation between input and output of the sub-miniature TSON is not optical but capacitive. When looking again at the different measuring channels inside a modern multimeter, this means at the bottom line a significant saving of battery energy for the entire device.
But not only the package size has been substantially decreased, the TSON also reveals considerable advantages regarding the temperature range, the drive power and the switching times: Within a guaranteed temperature range up to +105°C, the TSON MOSFET convinces with a low-current consumption of 0.2 mA. Its input is directly driven by 3-5V voltage which makes an additional series resistor - as required by conventional PhotoMOS – redundant.
Utmost accuracy, fast switching speeds, unlimited cycles and an efficient performance render the TSON CC series a perfect option not only for a wide range of multimeters, but also for the latest ATE applications, such as IC- and Board Testers.
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