ADG5421 Datasheet, PDF (1/20 Pages) Analog Devices – High Voltage Latch-Up Proof, Dual SPST Switches

Data Sheet
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
VDD to VSS analog signal range
APPLICATIONS
High voltage signal routing
Automatic test equipment
Analog front-end circuits
Precision data acquisition
Industrial instrumentation
Amplifier gain select
Relay replacement
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.
High Voltage Latch-Up Proof,
Dual SPST Switches
ADG5421/ADG5423
FUNCTIONAL BLOCK DIAGRAMS
ADG5421
S1
IN1
D1
D2
IN2
S2
SWITCHES SHOWN FOR A LOGIC 0 INPUT
Figure 1. ADG5421
ADG5423
S1
IN1
D1
D2
IN2
S2
SWITCHES SHOWN FOR A LOGIC 0 INPUT
Figure 2. ADG5423
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.
2. Low RON of 13.5 Ω.
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.
5. 3 V logic compatible digital inputs: VINH = 2.0 V, VINL = 0.8 V.
6. No VL logic power supply required.
7. Available in 10-lead MSOP package.
Rev. 0
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