ADG467

a FEATURES Fault and Overvoltage Protection up to ؎ 40 V Signal Paths Open Circuit with Power Off Signal Path Resistance of RON with Power On 44 V Supply Maximum Ratings Low On Resistance ADG466/ADG467 60 ⍀ typ 1 nA Max Path Current Leakage @ +25؇C Low R ON Match (5 ⍀ max) Low Power Dissipation 0.8 ␮W typ Latch-Up Proof Construction APPLICATIONS ATE Equipment Sensitive Measurement Equipment Hot-Insertion Rack Systems VDD VSS VD1 VD2 VD3 VS1 VS2 VS3 Triple and Octal Channel Protectors ADG466/ADG467 FUNCTIONAL BLOCK DIAGRAMS VDD VSS VD1 VD2 VD3 VS1 VS2 VS3 ADG466 VIN VIN VD8 VS8 VOUT VOUT ADG467 VDD VDD GENERAL DESCRIPTION The ADG466 and ADG467 are triple and octal channel protectors, respectively. The channel protector is placed in series with the signal path. The channel protector will protect sensitive components from voltage transience in the signal path whether the power supplies are present or not. Because the channel protection works whether the supplies are present or not, the channel protectors are ideal for use in applications where correct power sequencing can’t always be guaranteed (e.g., hotinsertion rack systems) to protect analog inputs. This is discussed further, and some example circuits are given in the Applications section of this data sheet. Each channel protector has an independent operation and consists of an n-channel MOSFET, a p-channel MOSFET and an n-channel MOSFET, connected in series. The channel protector behaves just like a series resist...