The MAX4539/MAX4540 are low-voltage CMOS 8-channel (MAX4539) and dual 4-channel (MAX4540) multiplexers ideal for precision ADC calibration and system self-monitoring 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.
The document describes the MAX4539 (single 8-to-1) and MAX4540 (dual 4-to-1) low-voltage, single supply CMOS cal-multiplexers. These devices are designed for precision ADC calibration and system self-monitoring applications, featuring on-chip gain and offset divider networks to generate accurate voltage ratios from an external reference voltage.
| Supply Voltage Range (Single) | +2.7V to +12V |
|---|---|
| On-Resistance (Ron) | 100Ω max |
| Off Leakage Current | 0.1nA at +25°C |
| Package Type | 20-pin DIP, SO, and SSOP |
| Logic Thresholds | 0.8V and 2.4V |
They are ideal for precision ADC calibration and system self-monitoring applications.
Yes, they can operate from dual supplies of +2.7V to +6V.