Datasheet ADG5462F (Analog Devices)

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User Defined Fault Protection and Detection,10 Ω RON, Quad Channel Protector Data Sheet ADG5462F FEATURES FUNCTIONAL BLOCK DIAGRAM User defined secondary supplies set overvoltage level VDD VSS Overvoltage protection up to −55 V and +55 V S1 D1 Power-off protection up to −55 V and +55 V Overvoltage detection on source pins S2 D2 Minimum secondary supply level: 4.5 V single-supply Interrupt flag indicates fault status S3 D3 Low on resistance: 10 Ω typical S4 D4 On-resistance flatness: 0.5 Ω maximum VIN VOUT 4 kV human body model (HBM) ESD rating ADG5462F FF Latch-up immune under any circumstance
001
VSS to VDD analog signal range POSFV NEGFV DR
12698-
±5 V to ±22 V dual supply operation
Figure 1.
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 low on-resistance of these switches, combined with the The ADG5462F contains four channels that are overvoltage on-resistance flatness over a significant portion of the signal protected. The channel protector is placed in series with the signal range make them an ideal solution for data acquisition and path and protects sensitive components from overvoltage faults instrumentation applications where excellent linearity and low in that path. The channel protector prevents overvoltages when distortion are critical. powered and unpowered, and it is ideal for use in applications
PRODUCT HIGHLIGHTS
where correct power supply sequencing cannot always be guaranteed. 1. Source pins (Sx) are protected against voltages greater than The primary supply voltages define the on-resistance profile, the secondary supply rails (POSFV and NEGFV), up to while the secondary supply voltages define the voltage level at −55 V and +55 V. which the overvoltage protection engages. 2. In an unpowered state, source pins (Sx) are protected When no power supplies are present, the channel remains in the off against voltages from −55 V to +55 V. condition, and the channel inputs are high impedance. Under 3. Overvoltage detection with digital output indicates the normal operating conditions, if the analog input signal levels on operating state of the channels. any Sx pin exceed positive fault voltage (POSFV) or negative fault 4. Trench isolation guards against latch-up. voltage (NEGFV) by a threshold voltage (VT), the channel turns 5. Optimized for low on-resistance and on-resistance flatness. off and that Sx pin becomes high impedance. If the DR pin is 6. The ADG5462F operates from a dual power supply range of driven low, the drain pin (Dx) is pulled to the secondary supply ±5 V to ±22 V or a single power supply range of 8 V to 44 V. 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 +55 V relative to ground are blocked in both the powered and unpowered conditions.
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Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ±15 V DUAL SUPPLY ±20 V DUAL SUPPLY 12 V SINGLE SUPPLY 36 V SINGLE SUPPLY CONTINUOUS CURRENT PER CHANNEL, Sx OR Dx ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TEST CIRCUITS TERMINOLOGY THEORY OF OPERATION SWITCH ARCHITECTURE ESD Performance Trench Isolation USER DEFINED FAULT PROTECTION Power-On Protection Power-Off Protection Digital Input Protection Overvoltage Interrupt Flag APPLICATIONS INFORMATION POWER SUPPLY RAILS POWER SUPPLY SEQUENCING PROTECTION POWER SUPPLY RECOMMENDATIONS USER DEFINED SIGNAL RANGE LOW IMPEDANCE CHANNEL PROTECTION HIGH VOLTAGE SURGE SUPPRESSION INTELLIGENT FAULT DETECTION LARGE VOLTAGE, HIGH FREQUENCY SIGNALS OUTLINE DIMENSIONS ORDERING GUIDE