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General Description

The MAX4539/MAX4540 low-voltage, CMOS 8-channel (MAX4539) and dual 4-channel (MAX4540) multiplexers are ideal for precision ADC calibration and system selfmonitoring applications. These calibration multiplexers (cal-muxes) have precision resistor-dividers to generate accurate voltage ratios from an input reference voltage. The reference ratios include 15/4096 and 4081/4096 of the external reference voltage, accurate to 15 bits, and 1/2V+ and 5/8(V+ - V-), accurate to 8 bits. The external reference voltage as well as ground can also be switched to the output.

Features

? On-Chip Gain and Offset Divider Networks Provide 15-Bit Accurate Output Ratios

? On-Chip V+ to GND and V+ to V- Divider Networks Provide 8-Bit Accurate Output Ratios

? RON: 100? max

? RON Matching Between Channels: 6? max

? Charge Injection: 5pC max

? Low 0.1nA Off Leakage Current

? Small 20-Pin SSOP/SO/DIP Packages

Applications

Battery-Operated Equipment

Avionics

Data-Acquisition Systems

Audio-Signal Routing

Test Equipment Networking