Описание
The MAX4578 are high-voltage, 8-channel CMOS multiplexers. The MAX4578 are 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 1/2(V+) 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 MAX4578 have enable inputs and address latching. All digital inputs have 0.8V and 2.4V logic thresholds, ensuring both TTL- and CMOS-logic compatibility when using a single +12V or dual ±15V supplies. Protection diodes at all inputs provide >2kV ESD rating. The MAX4578 operate from a single +4.5V to +36V supply or from dual supplies of ±4.5V to ±20V. On-resistance (350S1 max) is matched between switches to 15S1 max. Each switch can handle Rail-to-Rail analog signals. The off-leakage current is 20pA at TA = +25°C and 1.25nA at TA = +85°C.The MAX4578 are available in small 20-pin SSOP, SO, and DIP packages.
- 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
- 350O(max) Ron
- 12O(max) Ron Matching Between Channels
- 10pC (max) Charge Injection
- Guaranteed 20pA Off-Leakage Current
- Rail-to-Rail Signal Handling
- Small 20-Pin SSOP, SO, DIP Packages
