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The DG408 Single 8-Channel, and DG409 Differential 4-Channel monolithic CMOS analog multiplexers are drop-in replacements for the popular DG508A and DG509A series devices. They each include an array of eight analog switches, a TTL/CMOS compatible digital decode circuit for channel selection, a voltage reference for logic thresholds and an ENABLE input for device selection when several multiplexers are present.

The DG408 and DG409 feature lower signal ON resistance (<100Ω) and faster switch transition time (t_TRANS <250ns) compared to the DG508A or DG509A. Charge injection has been reduced, simplifying sample and hold applications. The improvements in the DG408 series are made possible by using a high-voltage silicon-gate process. An epitaxial layer prevents the latch-up associated with older CMOS technologies. Power supplies may be single-ended from +5V to +34V, or split from ±5V to ±20V.

The analog switches are bilateral, equally matched for AC or bidirectional signals. The ON resistance variation with analog signals is quite low over a ±5V analog input range.

Key Features

• ON Resistance (Max, 25°C) 100Ω
• Low Power Consumption (PD) <11mW
• Fast Switching Action
  • tTRANS <250ns
  • tON/OFF(EN) <150ns
• Low Charge Injection
• Upgrade from DG508A/DG509A
• TTL, CMOS Compatible
• Single or Split Supply Operation
• Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

• Data Acquisition Systems
• Audio Switching Systems
• Automatic Testers
• Hi-Rel Systems
• Sample and Hold Circuits
• Communication Systems
• Analog Selector Switch