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ADG5248FBRUZ-RL7 Arkusz danych(PDF) 1 Page - Analog Devices |
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1 / 33 page User Defined Fault Protection and Detection, 0.8 pC QINJ, 8:1/Dual 4:1 Multiplexers Data Sheet ADG5248F/ADG5249F Rev. 0 Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2015 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com 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 flags indicate fault status Low charge injection (QINJ): 0.8 pC Low drain/source on capacitance ADG5248F: 19 pF ADG5249F: 14 pF Latch-up immune under any circumstance Known state without digital inputs present 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 Relay replacement FUNCTIONAL BLOCK DIAGRAMS ADG5248F S1 S8 D A0 A1 A2 EN FF SF POSFV NEGFV FAULT DETECTION AND SWITCH DRIVER Figure 1. ADG5248F Functional Block Diagram ADG5249F S1A S4A DA S1B S4B DB A0 A1 EN POSFV NEGFV FF SF FAULT DETECTION AND SWITCH DRIVER Figure 2. ADG5249F Functional Block Diagram GENERAL DESCRIPTION The ADG5248F and ADG5249F are 8:1 and dual 4:1 analog multiplexers. The ADG5248F switches one of eight inputs to a common output, and the ADG5249F switches one of four differen- tial inputs to a common differential output. Each channel conducts equally well in both directions when on, and each channel has an input signal range that extends to the supplies. The primary supply voltages define the on-resistance profile, whereas 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 switch 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 switch on, the drain pin is pulled to the secondary supply voltage that was exceeded. Input signal levels up to +55 V or −55 V relative to ground are blocked, in both the powered and unpowered conditions. The low capacitance and charge injection of these switches make them ideal solutions for data acquisition and sample-and-hold applications, where low glitch switching and fast settling times are required. Note that, throughout this data sheet, multifunction pins, such as A0/F0, are referred to either by the entire pin name or by a single function of the pin, for example, A0, when only that function is relevant. PRODUCT HIGHLIGHTS 1. Source pins are protected against voltages greater than the secondary supply rails, up to −55 V and +55 V. 2. Source pins are protected against voltages between −55 V and +55 V in an unpowered state. 3. Overvoltage detection with digital output indicates operating state of switches. 4. Trench isolation guards against latch-up. 5. Optimized for low charge injection and on capacitance. 6. The ADG5248F/ADG5249F can be operated from a dual supply of ±5 V to ±22 V or a single power supply of 8 V to 44 V. |
Podobny numer części - ADG5248FBRUZ-RL7 |
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Podobny opis - ADG5248FBRUZ-RL7 |
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