Quad-Channel Protector
Description
Data Sheet
User Defined Fault Protection and Detection,10 Ω RON, Quad Channel Protector
ADG5462F
FEATURES
User defined secondary supplies set overvoltage level Overvoltage protection up to −55 V and +55 V Power-off protection up to −55 V and +55 V Overvoltage detection on source pins Minimum secondary supply level: 4.
5 V single-supply Interrupt flag indicates fault status
Low on resistance: 10 Ω typical On-resistance flatness: 0.
5 Ω maximum
4 kV human body model (HBM) ESD rating Latch-up immune under any circumstance VSS to VDD analog signal range
±5 V to ±22 V dual supply operation 8 V to 44 V single-supply operation Fully specified at ±15 V, ±20 V, +12 V, and +36 V
APPLICATIONS
Analog input/output modules Process control/distributed control systems Data acquisition Instrumentation Avionics Automatic test equipment Communication systems
GENERAL DESCRIPTION
The ADG5462F contains four channels that are overvoltage protected.
The channel protector is placed in series with the signal path and protects sensitive components from overvoltage faults in that path.
The channel protector prevents overvoltages when powered and unpowered, and it is ideal for use in applications where correct power supply sequencing cannot always be guaranteed.
The primary supply voltages define the on-resistance profile, while the secondary supply voltages define the voltage level at which the overvoltage protection engages.
When no power supplies are present, the channel remains in the off condition, and the channel inputs are high impedance.
Under normal operating conditions, if the analog input signal levels on any Sx pin exceed positive fault voltage (POSFV) or negative fault voltage (NEGFV) by a threshold voltage (VT), the channel turns off and that Sx pin becomes high impedance.
If the DR pin is driven low, the drain pin (Dx) is pulled to the secondary supply voltage that was exceeded.
The output profile for each DR voltage level is shown in Figure 49.
Input signal levels up to −55 V or...
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