(MAX328 / MAX329) Ultra-Low Leakage Monolithic CMOS Analog Multiplexers
19-1006; Rev 3; 2/11
MAX328/MAX329
Ultra-Low Leakage Monolithic CMOS Analog Multiplexers
General Description
The MAX3...
Description
19-1006; Rev 3; 2/11
MAX328/MAX329
Ultra-Low Leakage Monolithic CMOS Analog Multiplexers
General Description
The MAX328/MA329 are monolithic CMOS analog multiplexers. The MAX328 is a single-ended, 1-of-8 device, and the MAX329 is a differential, 2-of-8 device.
Designed to provide the lowest possible on- and offleakages, these multiplexers switch signals from high source impedance, providing the mux operates into a high-input-impedance op amp or A/D converter. The MAX328/MAX329 are pin-for-pin replacements for the popular DG508/DG509 in these applications.
Adding an external 40kΩ resistor to each input makes the MAX328/MAX329 an excellent fault-tolerant multiplexer. Low leakage (less than 1pA at +25°C) and 2.5kΩ on-resistance allow the circuit to sustain 110V AC faults indefinitely while maintaining an error of less than 40nV for normal signals (i.e., 1pA times 40kΩ).
The MAX328/MAX329 work equally well with a single supply of 10V to 30V or dual supplies of ±5V to ±18V. They...
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