The ADG467 is an octal channel protector. The channel protector is placed in series with the signal path. The channel protector protects sensitive components from voltage transience in the signal path regardless if the power supplies are present or not. For this reason, the channel protectors are ideal for use in applications where correct power sequencing cannot always be guaranteed (for example, hot insertion rack systems) to protect analog inputs. 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, that is, (VSS + 1.5 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 switches off, clamping the output to either VSS + 1.5 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. The ADG467 can operate off both bipolar and unipolar supplies. The channels are normally on when power is connected and open circuit when power is disconnected. With power supplies of ±15 V, the on resistance of the ADG467 is 62 Ω typical with a leakage current of ±1 nA maximum. When power is disconnected, the input leakage current is approximately ±0.5 nA typical. The ADG467 is available in an 18-lead SOIC package and a 20-lead SSOP package. Product Highlights Fault Protection. The ADG467 can withstand continuous voltage inputs from −40 V to +40 V. When a fault occurs due to the power supplies being turned off or due to an overvoltage being applied to the ADG467, the output is clamped. When power is turned off, current is limited to the microampere level. Low Power Dissipation. Low RON. 62 Ω typical. Trench Isolation Latch-Up Proof Construction. A dielectric trench separates the p- and n-channel MOSFETs thereby preventing latch-up. Applications ATE equipment Sensitive measurement equipment Hot insertion rack systems
Analog Devices has several brands around the world that distributors may use as alternate names. Analog Devices may also be known as the following names:
Analog Devices Inc
ANALOG
ADI
ANALOG DEVICE
ANALOG DEV
AD
ANA
PMI
ADV
Analog Devices Inc/Maxim Integrated
ANALOG DEVIC
ADA
PMI/AD
AD/PMI
STOCK
ANALOG DEVI
Analog Devices / Linear Technology
ANALOG INTERGRATIONS CORP
AD - Analog Devices
PRECISION MONOLITIC INC
ANADEV
ADI (Analog Devices Inc)
Analog Devices / Hittite
ANALOG DEVICES (ADI)
ANLOGDEVIC
Analog Devices Inc.
Part Number Aliases
This part may be known by these alternate part numbers: