The DG509B is a dual 4-channel differential analog multiplexer designed to connect one of four differential inputs to a common dual output as determined by its 2-bit binary address (A0, A1). Break-before-make switching action protects against momentary crosstalk between adjacent channels.
An on channel conducts current equally well in both directions. In the off state each channel blocks voltages up to the power supply rails. An enable (EN) function allows the user to reset the multiplexer / demultiplexer to all switches off for stacking several devices. All control inputs, addresses (AX) and enable (EN) are TTL compatible over the full specified operating temperature range.
The DG509B is fabricated on an enhanced SG-II CMOS process that achieves improved performance on: reduced charge injection, lower device leakage, and minimized parasitic capacitance.
As the DG509B has a long history in the industry with many suppliers offering copies - and in some cases improved variations - with the best in class improvements.
Applications for the DG509B include high speed and high precision data acquisition, audio signal switching and routing, ATE systems, and avionics. High performance and low power dissipation make them ideal for battery operated and remote instrumentation applications.
The DG509B have the absolute maximum voltage rating extended to 44 V. Additionally, single supply operation is also allowed. An epitaxial layer prevents latch-up.
The DG509B are both available in 16-lead SOIC, TSSOP, PDIP, and miniQFN (1.8 mm x 2.6 mm) package options with extended temperature range of -40°C to +125°C.
Operate with single or dual power supply
V+ to V- analog signal swing range
44 V power supply maximum rating
Extended operate temperature range: -40 °C to +125 °C
Low leakage typically < 3 pA
Low charge injection - QINJ = 2 pC
Low power - ISUPPLY: 10 μA
TTL compatible logic
> 250 mA latch-up current per JESD78
Available in SOIC16, TSSOP16, PDIP, and miniQFN16 packages