Datasheet ADG5243F (Analog Devices)

User Defined Fault Protection and Detection, 0.8 pC QINJ, Triple SPDT Data Sheet ADG5243F FEATURES FUNCTIONAL BLOCK DIAGRAM User defined supplies set overvoltage level ADG5243F Overvoltage protection up to −55 V and +55 V S1A D1 Power-off protection up to −55 V and +55 V S1B S3B Overvoltage detection on source pins D3 Minimum secondary supply level: 4.5 V single-supply S3A S2B Interrupt flags indicate fault status D2 S2A Low charge injection (QINJ): 0.8 pC Low drain/source on capacitance: 10 pF FAULT FF DETECTION Latch-up immune under any circumstance AND SWITCH SF DRIVER Known state without digital inputs present V 1 2 3 V V SS to VDD analog signal range IN IN IN EN F SF ±5 V to ±22 V dual supply operation PO NEG
1 00
8 V to 44 V single-supply operation NOTES
3-
1. SWITCHES SHOWN FOR INPUT LOGIC 1.
307 1
Fully specified at ±15 V, ±20 V, +12 V, and +36 V
Figure 1.
APPLICATIONS Analog input/output modules Process control/distributed control systems Data acquisition Instrumentation Avionics Automatic test equipment Communication systems Relay replacement GENERAL DESCRIPTION
The ADG5243F comprises three independently selectable, single- The low capacitance and charge injection of these switches pole/double-throw (SPDT) switches. All channels exhibit break- make them ideal solutions for data acquisition and sample-and- before-make switching action that prevents momentary shorting hold applications, where low glitch switching and fast settling when switching channels. An EN input enables or disables the times are required. device. When disabled, all channels are switched off. Each switch Note that, throughout this data sheet, multifunction pins, such conducts equally well in both directions when on, and each as IN1/F1, are referred to either by the entire pin name or by a switch has an input signal range that extends to the supplies. single function of the pin, for example, IN1, when only that The primary supply voltages define the on-resistance profile, function is relevant. whereas the secondary supply voltages define the voltage level at which the overvoltage protection engages.
PRODUCT HIGHLIGHTS
1. The source pins are protected against voltages greater than When no power supplies are present, the channel remains in the the secondary supply rails, up to −55 V and +55 V. off condition, and the switch inputs are high impedance. Under 2. The source pins are protected against voltages between normal operating conditions, if the analog input signal levels on any Sx pin exceed the positive fault voltage (POSFV) or the −55 V and +55 V in an unpowered state. negative fault voltage (NEGFV) by a threshold voltage (V 3. Overvoltage detection with the digital output indicates the T), the operating state of the switches. channel turns off and that Sx pin becomes high impedance. If 4. Trench isolation guards against latch-up. the switch is selected to be on, then the drain pin is pulled to the 5. Optimized for low charge injection and on-capacitance. secondary supply voltage that was exceeded. Input signal levels up 6. The ADG5243F can be operated from a dual supply of ±5 V to −55 V or +55 V relative to ground are blocked, in both the powered and unpowered conditions. to ±22 V or a single power supply of 8 V to 44 V.
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Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION PRODUCT HIGHLIGHTS 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 SIGNAL RANGE POWER SUPPLY RECOMMENDATIONS HIGH VOLTAGE SURGE SUPPRESSION INTELLIGENT FAULT DETECTION LARGE VOLTAGE, HIGH FREQUENCY SIGNALS OUTLINE DIMENSIONS ORDERING GUIDE