Datasheet ADG5401F (Analog Devices)

Fault Protection, 6 Ω RON, SPST Switch with 0.6 kΩ Feedback Channel Data Sheet ADG5401F FEATURES FUNCTIONAL BLOCK DIAGRAM Analog output protection and detection solution ADG5401F Overvoltage protection up to ±60 V on S and SFB pins D S Power off protection up to ±60 V on S and SFB pins Integrated 0.6 kΩ secondary feedback channel POC Known output under all conditions User enabled, power-on condition pulls source to 0 V DFB SFB Known state without digital inputs present
001
IN FF Optimized resistance for measurement channel and
22052-
feedback channel
Figure 1.
Low on resistance of 6 Ω typical on signal channel GENERAL DESCRIPTION Ultraflat, on resistance on signal channel Latch-up immune
The ADG5401F main channel switch is a SPST, low on-resistance
3 mm × 2 mm LFCSP
switch that features overvoltage protection, power off protection,
V
and overvoltage detection on the source pins (S and SFB). The
SS to VDD −2 V signal range Fully specified at ±15 V, ±20 V, +12 V, and +36 V
ADG5401F also features a protected secondary feedback channel
±5 V to ±22 V dual-supply operation
for use with digital-to-analog converter (DAC) or amplifier outputs.
8 V to 44 V single-supply operation
When no power supplies are present, the switch remains in the
APPLICATIONS
off condition, and the switch inputs are high impedance.
DAC output protection
When powered, if the analog input signal levels on the S pin
Amplifier output protection
exceed VDD or VSS by a threshold voltage (VT) the switch turns
Analog output modules
off, the open-drain FF pin pulls to a logic low and a path between
Process control/distributed control systems
the D and DFB pins is switched on to prevent an open-loop
Data acquisition
condition on the amplifier output. Input signal levels up to +60 V
Instrumentation
or −60 V relative to ground are blocked, in both the powered and
COMPANION PRODUCTS
unpowered condition. The selectable POC pin function allows the protected switch terminal, S, to be connected to GND to
Current/Voltage Output DAC: AD5423
minimize glitches on the output. The switch turns on with a
Precision Amplifier: ADA4077-1 Rail-to-Rail Output, JFET Op Amp: ADA4625-1
Logic 1 input and conducts equal y wel in both directions. The digital input is compatible with 1.8 V logic inputs over the ful operating supply range.
PRODUCT HIGHLIGHTS
1. Source pin is protected against voltages greater than the supply rails, up to −60 V and +60 V in both powered and unpowered states. 2. Overvoltage detection with digital output indicates operating state of switches. 3. Trench isolation guards against latch-up. 4. The ADG5401F can operate from a dual supply range of ±5 V to ±22 V or a single-supply range of +8 V to +44 V. 5. Negative channel metal oxide semiconductor (NMOS) only architecture requires 2 V headroom toward VDD and provides low RON and ultraflat RON across the VSS to VDD − 5 V signal range.
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Document Outline FEATURES APPLICATIONS COMPANION PRODUCTS 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, S OR D ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ELECTROSTATIC DISCHARGE (ESD) RATINGS ESD Ratings for ADG5401F ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TEST CIRCUITS TERMINOLOGY THEORY OF OPERATION SWITCH ARCHITECTURE ESD Performance Trench Isolation OVERVOLTAGE FAULT PROTECTION Power-On Protection Power Off Protection Overvoltage Interrupt Flag APPLICATIONS INFORMATION POWER SUPPLY RAILS POWER SUPPLY RECOMMENDATIONS POWER SUPPLY SEQUENCING PROTECTION SIGNAL RANGE LOW IMPEDANCE OUTPUT CHANNEL PROTECTION INTELLIGENT FAULT DETECTION LARGE VOLTAGE, HIGH FREQUENCY SIGNALS AMPLIFIER OR DAC OUTPUT PROTECTION OPEN-LOOP PREVENTION POWER-ON CONDITION SWITCHES IN A KNOWN STATE HIGH VOLTAGE SURGE SUPPRESSION OUTLINE DIMENSIONS ORDERING GUIDE