User Defined Fault Protection and

Data Sheet

ADG5243F

Rev. 0

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FEATURES

User defined 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 drain/source on capacitance: 10 pF

Latch-up immune under any circumstance

Known state without digital inputs present

±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 DIAGRAM

S1A

D1

S1B

S3B

D3

S3A

FF

SF

S2B

D2

S2A

ADG5243F

FAULT

DETECTION

AND SWITCH

DRIVER

NOTES

1. SWITCHES SHOWN FOR INPUT LOGIC 1.

Figure 1.

GENERAL DESCRIPTION

The ADG5243F comprises three independently selectable, single-

pole/double-throw (SPDT) switches. All channels exhibit break-

before-make switching action that prevents momentary shorting

when switching channels. An EN input enables or disables the

device. When disabled, all channels are switched off. Each switch

conducts equally well in both directions when on, and each

switch 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 the positive fault voltage (POSFV) or the

channel turns off and that Sx pin becomes high impedance. If

the switch is selected to be on, then 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 IN1/F1, are referred to either by the entire pin name or by a

single function of the pin, for example, IN1, when only that

function is relevant.

PRODUCT HIGHLIGHTS

1. The source pins are protected against voltages greater than

the secondary supply rails, up to −55 V and +55 V.

2. The source pins are protected against voltages between

−55 V and +55 V in an unpowered state.

3. Overvoltage detection with the digital output indicates the

operating state of the switches.

4. Trench isolation guards against latch-up.

5. Optimized for low charge injection and on-capacitance.

6. The ADG5243F can be operated from a dual supply of ±5 V

to ±22 V or a single power supply of 8 V to 44 V.