MAX4633

故障保护，高电压，双路模拟开关 Fault-Protected, High-Voltage, Dual Analog Switches

Description

The MAX4631/MAX4632/ high-voltage, dual analog switches are pin compatible with the industry-standard DG401/DG403/DG405. They upgrade the existing devices with fault-protected inputs and rail-to-rail signal handling capabilities. The MAX4631/MAX4632/MAX4633"s normally open NO and normally closed NC terminals are protected from overvoltage faults up to 36V during power-up or power-down. During a fault condition, these terminals become open circuit and only nanoamperes of leakage current flow from the source, yet the switch output COM_ continues to furnish up to 18mA of the appropriate polarity supply voltage to the load. This ensures unambiguous rail-to-rail outputs when a fault begins and ends. On-resistance is 85Ω max at +25°C and is matched between switches to 6Ω max. Off-leakage current is only 0.5nA at +25°C and 5nA at +85°C.

The MAX4631 has two NO single-pole/single-throw SPST switches. The MAX4632 has two NO/NC single-pole/double-throw SPDT switches. The MAX4633 has two NO double-pole/single-throw DPST switches.

These CMOS switches operate with dual power supplies ranging from ±4.5V to ±18V or a single supply between +9V and +36V. All digital inputs have +0.8V and +2.4V logic thresholds, ensuring both TTL- and CMOS-logic compatibility when using ±15V or a single +12V supply.