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Radiation-Tolerant, 5-V Multiplexers for Space Flight Systems

Intersil Corp. recently expanded its suite of radiation-tolerant multiplexers with two new, single-supply, 5-V devices—the 16-channel ISL71830SEH and 32-channel ISL71831SEH. The new multiplexers provide data acquisition systems quality ESD protection and signal processing performance. In addition, the 5-V multiplexers also offer faster propagation delays, which improve signal processing response time. The enhanced 5-kV ESD protection feature makes it unnecessary to use costly external protection diodes on the input pins. In addition, both multiplexers have reduced RON of 120 Ω and propagation delays of less than 100 ns to increase the overall performance and accuracy of telemetry signals processed and multiplexed into an analog-to-digital converter’s (ADC) input.Intersil ISL71830SEH

Features and specifications:

  • 3 to 5.5 V single supply operation with adjustable logic threshold control
  • Delivers 5-kV human body model ESD protection
  • Rail-to-rail switch input provides wide dynamic range for extra design flexibility
  • Over-voltage shutoff protects upstream/downstream devices when a switch goes 1 to 2 V past the rails
  • Cold sparing and analog overvoltage range from –0.4 to 7 V
  • Switch input off leakage of 120 nA and low RON of 120 Ω reduces power consumption, and improves signal integrity
  • Single event transient (SET) performance of 10 µs maximum transient duration and 75 mV maximum transient magnitude at 60 MeV.cm2/mg and at 5.5 V supplies eliminates the need for output filtering to achieve optimal performance
  • Low dose rate (0.01 rad(Si)/s) radiation tolerance of 75 krad(Si)
  • SEL/SEB LETTH immune up to 60 MeV.cm2/mg

 

Source: Intersil


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