TI DG441AK/883

The DG441 and DG442 monolithic CMOS analog switches are drop-in replacements for the popular DG201A and DG202 series devices. They include four independent single pole single throw (SPST) analog switches, TTL and CMOS compatible digital inputs, and a voltage reference for logic thresholds. These switches feature lower analog ON resistance (<85Ω) and faster switch time (ton<250ns) compared to the DG201A and DG202. Charge injection has been reduced, simplifying sample and hold applications. The improvements in the DG441 series are made possible by using a high voltage silicon-gate process. An epitaxial layer prevents the latch-up associated with older CMOS technologies. The 44V maximum voltage range permits controlling 40V p.p signals. Power supplies may be single-ended from ±5V to +34V, or split from ±5V to ±20V. The four 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. The switches in the DG441 and DG442 are identical, differing only in the polarity of the selection logic.

• ON-Resistance(Max): 85Ω
• Low Power Consumptlon (PD <1.6mW)
• Fast Switching Action: ton <250ns, toff <120ns (DG441)
• Low Charge Injection
• Upgrade from DG201A DG202
• TTL, CMOS Compatible
• Single or Split Supply Operation

• Audio Switching
• Battery Operated Systems
• Data Acquisition
• Hi-Rel Systems
• Sample and Hold Circuits
• Communication Systems
• Automatic Test Equipment