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., hot-insertion 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 resistor during normal operation, i.e., (VSS + 2 V) < VIN < (VDD 1.5 V). When a channel's analog input exceeds the power supplies (including VDD and VSS =0 V), one of the MOSFETs will switch off, clamping the output to either VSS + 2 V or VDD 1.5 V. Circuitry and signal source protection is provided in the event of an overvoltage or power loss. The channel protectors can withstand overvoltage inputs
from 40 V to +40 V. See the Circuit Information section of this data sheet.
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ATE EquipmentSensitive Measurement EquipmentHot-Insertion Rack Systems
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Signal Paths Open Circuit with Power OffSignal Path Resistance of RON with Power On44 V Supply Maximum RatingsLow On Resistance1 nA Max Path Current Leakage @ +258Low RON Match (5 V max)Low Power Dissipation 0.8 mW typLatch-Up Proof Construction
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VDD to VSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +44 V
VS, VD, Analog Input Overvoltage with Power ON2
. . . . . . . . . . . . . . . . . . . . . . . . . . . .VSS 20 V to VDD + 20 V
VS, VD, Analog Input Overvoltage with Power OFF2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35 V to +35 V
Continuous Current, S or D . . . . . . . . . . . . . . . . . . . . .20 mA
Peak Current, S or D . . . . . . . . . . . . . . . . . . . . . . . . . . 40 mA
(Pulsed at 1 ms, 10% Duty Cycle Max)
Operating Temperature Range
Industrial (B Version) . . . . . . . . . . . . . . . . . 40°C to +85°C
Storage Temperature Range . . . . . . . . . . 65°C to +125°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . +150°C
Plastic DIP Package
JA, Thermal Impedance . . . . . . . . . . . . . . . . . . .. 125°C/W
Lead Temperature, Soldering (10 sec) . . . . . . . . . +260°C
SOIC Package
JA, Thermal Impedance . . . . . . . . . . . . . . . . . . . 160°C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . +215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . +220°C
µSOIC Package
JA, Thermal Impedance . . . . . . . . . . . . . . . . . . 160°C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . .+215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . +220°C
SSOP Package
JA, Thermal Impedance . . . . . . . . . . . . . . . . . . 130°C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . .
Post a Buying Lead
Required Field 
