MAX398

19-0299; Rev. 2; 7/96 Precision, 8-Channel/Dual 4-Channel, Low-Voltage, CMOS Analog Multiplexers _______________General Description The MAX398/MAX399 precision, monolithic, CMOS analog multiplexers (muxes) offer low on-resistance (less than 100Ω), which is matched to within 6 Ω between channels and remains flat over the specified analog signal range (11Ω max). They also offer low leakage over temperature (NO-off leakage current less than 2.5nA at +85°C) and fast switching speeds (transition time less than 250ns). The MAX398 is an 8-channel device, and the MAX399 is a dual 4-channel device. The MAX398/MAX399 are fabricated with Maxim’s lowvoltage silicon-gate process. Design improvements yield extremely low charge injection (less than 5pC) and guarantee electrostatic discharge protection greater than 2000V. These muxes operate with a single +3V to +15V supply or bipolar ±3V to ±8V supplies, while retaining CMOS-logic input compatibility and fast switching. CMOS inputs provide reduced input loading. The MAX398/MAX399 are pin compatible with the industry-standard DG408, DG409, DG508A, and DG509A. ____________________________Features o Pin Compatible with Industry-Standard DG408/DG409/DG508A/DG509A o Guaranteed On-Resistance Match Between Channels (<6Ω ) o Low On-Resistance (<100Ω ) o Guaranteed Flat On-Resistance over Signal Range (<11Ω) o Guaranteed Low Charge Injection (<5pC) o NO-Off Leakage Current <1nA at +85°C o COM-Off Leakage Current <2.5nA at +85°C o Electrostatic Dis...