Switches' 0.01μW power consumption suits wearables

They also offer high precision characterised by low parasitic capacitance, charge injection and leakage current.

Measuring 1.4x1.4mm with a 0.35mm pitch and top-side lamination for increased ruggedness, the switches are claimed to be 50% smaller than the closest competing device and 95% smaller than switches in the standard QFN16 package. Combining their compact size with typical power consumption of less than 0.01µW to prolong battery life, the DG2501, DG2502 and DG2503 are suited for AFE signal switching, programmable gain control and sample and hold circuits and multiple analogue input multiplexing in smart watches, medical patches, fitness monitors, sensors, and other such products that make up the IoT.

The switches provide low C_D(OFF) of 2.6pF, C_D(ON) of 7.6pF, charge injection down to -0.7pC and typical switch-on leakage current of 9pA. The DG2501, DG2502 and DG2503 offer high ESD tolerance of more than 8kV (human body model) and latch up current of greater than 800mA per JESD78. Each switch conducts equally well in both directions when on and supports analogue signals up to the supply voltage.

The DG2501, DG2502 and DG2503 all feature four independently selectable SPST switches with closely matched channel resistance. The DG2501 is normally closed, while the DG2502 is normally open. The DG2503 has two normally open and two normally closed switches. All three devices feature guaranteed break-before-make operation for use in multiplexer applications. The switches operate from a single 1.8 to 5.5V power supply and offer logic thresholds of 1.4 and 1.8V at 3 and 5V inputs, respectively, to ensure low-voltage TTL/CMOS compatibility. The Vishay GREEN devices are RoHS-compliant and halogen-free.

Samples and production quantities of the DG2501, DG2502 and DG2503 are available now, with lead times of 10 weeks for large orders.