High Voltage Latch-Up Proof,

Dual SPST Switches

Data Sheet

ADG5421/ADG5423

Rev. 0

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FEATURES

Latch-up immune under all circumstances

Human body model (HBM) ESD rating: 8 kV

Low on resistance: 13.5 Ω

±9 V to ±22 V dual-supply operation

9 V to 40 V single-supply operation

48 V supply maximum ratings

Fully specified at ±15 V, ±20 V, +12 V, and +36 V

APPLICATIONS

High voltage signal routing

Automatic test equipment

Analog front-end circuits

Precision data acquisition

Industrial instrumentation

Amplifier gain select

Relay replacement

FUNCTIONAL BLOCK DIAGRAMS

Figure 1. ADG5421

Figure 2. ADG5423

GENERAL DESCRIPTION

The ADG5421/ADG5423 are monolithic industrial,

complementary metal oxide semiconductor (CMOS) analog

switches containing two independent latch-up immune single-

pole/single-throw (SPST) switches. Each switch conducts

equally well in both directions when on, and has an input signal

range that extends to the power supplies. In the off condition,

signal levels up to the supplies are blocked. Both ADG5421

switches are turned on with a Logic 1 input, whereas the

ADG5423 has one switch turned on and one switch turned off

for a Logic 1 input. The ADG5423 exhibits break-before-make

action for use in multiplexer applications.

The ultralow on resistance and on-resistance flatness of these

switches make them ideal solutions for data acquisition and gain

switching applications where low distortion is critical. The

latch-up immune construction and high ESD rating make these

switches more robust in harsh environments.

PRODUCT HIGHLIGHTS

1. Trench isolation guards against latch-up. A dielectric trench

separates the P channel and N channel transistors, thereby

preventing latch-up even under severe overvoltage

conditions.

3. Dual-supply operation. For applications where the analog

signal is bipolar, the ADG5421/ADG5423 can operate

from dual supplies up to ±22 V.

4. Single-supply operation. For applications where the analog

signal is unipolar, the ADG5421/ADG5423 can operate from

a single-rail power supply up to 40 V.

7. Available in 10-lead MSOP package.

ADG5421

IN1

IN2

D2

S2

S1

D1

SWITCHES SHOWN FOR A LOGIC 0 INPUT

IN1

S1

D1

ADG5423

IN2

D2

S2

SWITCHES SHOWN FOR A LOGIC 0 INPUT