60 V Fault Protection and Detection, 11 R , Dual SPST Switch ON Data Sheet ADG5421F FEATURES FUNCTIONAL BLOCK DIAGRAM Overvoltage fault protection up to 60 V on S1 and S2 pins ADG5421F Power-off protection up to 60 V on S1 and S2 pins D1 S1 Known state without digital inputs present S2 D2 Low on resistance of 11 typical Ultraflat, on resistance FAULT DETECTION FF Latch-up immune under any circumstance AND SWITCH DRIVER 3.5 kV human body model (HBM) ESD rating VSS to VDD 2 V signal range IN1 IN2 Fully specified at 15 V, 20 V, +12 V, and +36 V Figure 1. 5 V to 22 V dual-supply operation 8 V to 44 V single-supply operation 10-lead, 3 mm 2 mm, LFCSP APPLICATIONS Analog input and output modules COMPANION PRODUCTS Process control and distributed control systems Precision 24-Bit ADC: AD7768-1 Data acquisition Precision 16-Bit, 2 MSPS SAR ADC: AD4000 Instrumentation Avionics Automatic test equipment Communication systems Relay replacement GENERAL DESCRIPTION The ADG5421F is a dual SPST, low on resistance switch that PRODUCT HIGHLIGHTS features overvoltage protection, power-off protection, and 1. Source pins are protected against voltages greater than the overvoltage detection on the source pins. supply rails, up to 60 V and +60 V in both powered and When no power supplies are present, the switch remains in the unpowered state. off condition, and the switch inputs are high impedance. When 2. Overvoltage detection with digital output indicates powered, if the analog input signal levels on either of the Sx pins operating state of switches. exceed VDD or VSS by the threshold voltage, VT, both switches 3. Trench isolation guards against latch-up. turn off together, and the open-drain fault flag (FF) pin pulls to a 4. The ADG5421F can operate from a dual supply of 5 V up logic low. Input signal levels up to +60 V or 60 V relative to to 22 V or a single power supply of +8 V up to +44 V. ground are blocked in both the powered and unpowered 5. Negative channel metal oxide semiconductor (NMOS) condition. only architecture requires 2 V headroom towards VDD and provides low RON and low RON flatness across the signal The switches turn on with a Logic 1 input and conduct equally range of VSS to VDD 2 V. well in both directions. The digital input is compatible with 1.8 V logic inputs over the full operating supply range. Rev. 0 Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. Tel: 781.329.4700 2020 Analog Devices, Inc. All rights reserved. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. 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Technical Support www.analog.com 25051-001ADG5421F Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Typical Performance Characteristics .......................................... 16 Applications ...................................................................................... 1 Test Circuits .................................................................................... 21 General Description ......................................................................... 1 Terminology .................................................................................... 25 Functional Block Diagram .............................................................. 1 Theory of Operation ...................................................................... 26 Companion Products ....................................................................... 1 Switch Architecture ................................................................... 26 Product Highlights ........................................................................... 1 Overvoltage Fault Protection ................................................... 27 Revision History ............................................................................... 2 Applications Information ............................................................. 28 Specifications .................................................................................... 3 Power Supply Rails ..................................................................... 28 15 V Dual Supply ....................................................................... 3 Power Supply Recommendations ............................................ 28 20 V Dual Supply ....................................................................... 5 Power Supply Sequencing Protection ..................................... 28 12 V Single Supply ....................................................................... 8 Signal Range ................................................................................ 28 36 V Single Supply ..................................................................... 11 Intelligent Fault Detection ........................................................ 28 Continuous Current per Channel, S or D ............................... 13 Switch in a Known State ............................................................ 28 Absolute Maximum Ratings ......................................................... 14 High Voltage Surge Suppression ............................................. 29 Thermal Resistance .................................................................... 14 Related Products......................................................................... 30 Electrostatic Discharge (ESD) Ratings .................................... 14 Outline Dimensions ....................................................................... 31 ESD Caution................................................................................ 14 Ordering Guide .......................................................................... 31 Pin Configuration and Function Descriptions .......................... 15 REVISION HISTORY 10/2020Revision 0: Initial Version Rev. 0 Page 2 of 31