Datasheet ADG5248F, ADG5249F (Analog Devices)

User Defined Fault Protection and Detection, 0.8 pC QINJ, 8:1/Dual 4:1 Multiplexers Data Sheet ADG5248F/ ADG5249F FEATURES FUNCTIONAL BLOCK DIAGRAMS User defined secondary supplies set overvoltage level ADG5248F Overvoltage protection up to −55 V and +55 V S1 Power-off protection up to −55 V and +55 V Overvoltage detection on source pins Minimum secondary supply level: 4.5 V single-supply D Interrupt flags indicate fault status Low charge injection (QINJ): 0.8 pC Low drain/source on capacitance S8 ADG5248F: 19 pF FAULT DETECTION FF ADG5249F: 14 pF AND SF SWITCH DRIVER Latch-up immune under any circumstance
001
Known state without digital inputs present A0 A1 A2 EN POSFV NEGFV
13072-
VSS to VDD analog signal range
Figure 1. ADG5248F Functional Block Diagram
±5 V to ±22 V dual-supply operation 8 V to 44 V single-supply operation ADG5249F Fully specified at ±15 V, ±20 V, +12 V, and +36 V S1A DA APPLICATIONS S4A Analog input/output modules S1B Process control/distributed control systems DB Data acquisition S4B Instrumentation Avionics FAULT DETECTION FF AND SF Automatic test equipment SWITCH DRIVER Communication systems
002
A0 A1 EN POSFV NEGFV Relay replacement
13072- Figure 2. ADG5249F Functional Block Diagram
GENERAL DESCRIPTION
The low capacitance and charge injection of these switches make The ADG5248F and ADG5249F are 8:1 and dual 4:1 analog them ideal solutions for data acquisition and sample-and-hold multiplexers. The ADG5248F switches one of eight inputs to a applications, where low glitch switching and fast settling times common output, and the ADG5249F switches one of four differen- are required. tial inputs to a common differential output. Each channel conducts Note that, throughout this data sheet, multifunction pins, such as equal y wel in both directions when on, and each channel has an A0/F0, are referred to either by the entire pin name or by a single input signal range that extends to the supplies. The primary supply function of the pin, for example, A0, when only that function is voltages define the on-resistance profile, whereas the secondary relevant. supply voltages define the voltage level at which the overvoltage
PRODUCT HIGHLIGHTS
protection engages. 1. Source pins are protected against voltages greater than the When no power supplies are present, the channel remains in the off secondary supply rails, up to −55 V and +55 V. condition, and the switch inputs are high impedance. Under normal 2. Source pins are protected against voltages between −55 V operating conditions, if the analog input signal levels on any Sx pin and +55 V in an unpowered state. exceed positive fault voltage (POSFV) or negative fault voltage 3. Overvoltage detection with digital output indicates (NEGFV) by a threshold voltage (VT), the channel turns off and operating state of switches. that Sx pin becomes high impedance. If the switch on, the drain pin 4. Trench isolation guards against latch-up. is pulled to the secondary supply voltage that was exceeded. Input 5. Optimized for low charge injection and on capacitance. signal levels up to +55 V or −55 V relative to ground are blocked, in 6. The ADG5248F/ADG5249F can be operated from a dual both the powered and unpowered conditions. supply of ±5 V to ±22 V or a single power supply of 8 V to 44 V.
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Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAMS 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, D, 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 SIGNAL RANGE POWER SUPPLY RECOMMENDATIONS HIGH VOLTAGE SURGE SUPPRESSION INTELLIGENT FAULT DETECTION LARGE VOLTAGE, HIGH FREQUENCY SIGNALS OUTLINE DIMENSIONS ORDERING GUIDE