Vishay recently released two new multiplexers that are optimised for ±15 V high-precision, low-noise signal switching in data acquisition, industry process control, test and measurement, and medical systems. The design of the 8-channel DG508B and dual 4-channel DG509B makes the devices ideally suited for high-precision multiplexing in the analog front end of A-to-D networks, where fast and accurate data acquisition performance is required.
The CMOS analog multiplexers provide an extended maximum voltage rating to 44 V, with rail-to-rail analog capability, and can be operated in either a dual or single supply configuration. The devices are fabricated on an enhanced SG-II CMOS process with channel off-leakage typically less than 3 pA in a wide analog signal range. The source-off parasitic capacitance is minimised to 3 pF, and charge injection is less than 2 pC.
The devices have low power consumption, typically 10 μA at 25°C with a guaranteed maximum of 600 μA over temperature. The enhanced SG-II CMOS process also allows them to achieve a -3 dB bandwidth greater than 200 MHz with crosstalk and off-isolation of -40 dB at 100 MHz, making them a versatile fit for a wide range of analog signal applications, including video.
The on-channel of the DG508B and DG509B conducts current equally well in both directions, while each channel blocks voltages up to the power supply rails in the off state. The multiplexers feature an enable function to reset all switches to off for stacking of several devices. Features also include TTL-compatible logic and break-before-make switching action to protect against momentary crosstalk between adjacent channels.
The DG508B and DG509B are both available in 16-pin SOIC and TSSOP packages with an extended temperature range of -40°C to +125°C. The devices feature lead-free terminations and are RoHS-compliant and halogen-free according to IEC 61249-2-21.
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