ADG5462FIntegrated four channels with overvoltage protection. Channel protectors are connected in series with the signal path to protect sensitive devices from overvoltage faults on that path. Channel protectors protect against overvoltage, with or without power, making them ideal for applications where there is no guarantee that the power supply timing will always be correct. The main supply voltage defines the on-resistance curve, and the secondary supply voltage defines the voltage level at which overvoltage protection is enabled.
When there is no power, the channel remains off and the channel input is in a high-impedance state. Under normal operating conditions, if the analog input signal level on either Sx pin exceeds the positive fault voltage (POSFV) or negative fault voltage (NEGFV) and exceeds the threshold voltage (V) by amplitude
T), the channel shuts down and the Sx pin becomes high impedance. If the DR pin is pulled low, the drain pin (Dx) is pulled to the secondary supply voltage that has been exceeded. The output curves for each DR voltage level are shown in Figure 1. Input signal levels of −55 V or +55 V relative to ground are blocked, with or without supply.
The low on-resistance of these switches, which remains flat over a considerable signal range, make them an ideal solution for data acquisition and instrumentation applications that require excellent linearity and low distortion performance.
Product features
- The source pins are protected against overvoltages up to −55 V and +55 V above the secondary rails (POSFV and NEGFV).
- In the absence of power, the source pin (Sx) is protected from voltages from −55 V to +55 V.
- Overvoltage detection provides a digital output that indicates the operating status of the channel.
- Channel isolation prevents latch-up.
- Optimized for low on-resistance and on-resistance flatness.
- ADG5462F can operate from dual supplies from ± 5 V to ±22 V or from a single supply from 8 V to 44 V.
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- Analog input/output modules
- Process control/distributed control systems
- Data acquisition
- Instrumentation
- Avionics
- Automatic test equipment
- Communication systems