### Q

Where should I tie GND connection, to digital or analogue ground?

### A

As long as there is some interconnection somewhere in the system between the
Analog GND and Digital GND, the bipolar switches can function with VL connected
to +5V digital and…

### Q

How do the voltage levels change when I use VL=15V, which does not violates the
abs max ratings?

### A

It is not recommended to use +15V on the VL pin. Using this level will change
the threshold voltages and we do not have any data to say what they…

### Q

What are the Power Supply sequencing requirements for ADG452?

### A

You should not power up VL before VDD or you will be exceeding the
absolute max ratings for the part (VL to GND  = −0.3 V to VDD + 0.3 V) and will
result in part failure, if this…

### Q

Can the ADG452 be powered from a single 24V supply and 3.3V digital supply?

### A

Yes the ADG452 can be powered from a single 24V supply and logic power supply
VL can be 3.3V.
Note you should not power up VL before VDD or you will be exceeding the…

• ### Power up sequence of ADG452

We used ADG452 in dual power mode. Vss=-15V Vdd=+15V.

When i supply Vss=-15V first(befor supply Vdd), the D1 pin appeared voltage -100mV. This voltage is not what we expect

So,The power up sequence Vss,Vdd,VL is problem? what is the right power up sequence…

• ### Status of ADG452

I noticed the Product Status shows Production, but there is a recommendation just below that states NEW DESIGNS consider ADG1412 or ADG5412

Is there going to be continued production of the ADG452?

We need a life of at least 7 years, perhaps more so…

### Q

Why some microcircuits ADG452 and ADG453, at submission supply voltage Vdd = +
15 V, Vss =-15 V, VL = + 5 V start to be heated up strongly, the current of
consumption up to several tens ma increases, at changeover by other copies of
the same microcircuits…

### Q

Would you please help to understand the the typical expected threshold voltage
as a function of digital supply voltage, VL.

### A

Please see the attached application note for the ADG451 VL voltage threshold.
The ADG411 has a similar logic block so…

### Q

I want to use the ADG411 +-12V but with a Vlogic=3V - would this work?

### A

Yes it is possible to apply 3V to the Vl pin. We just have it specified at 5V.
For the ADG412 the Vl applied can be in the range of -0.3V to Vdd +0.3V.  Our
parts are spec…