2.1 Ω On Resistance, 1ꢀ ꢁV/12 ꢁV ꢀ ꢁ
iCMOS Dual SPST Switches
ADG1421VADG1422VADG1423
FUNCTIONAL BLOCK DIAGRAM
FEATURES
2.1 Ω on resistance
ADG1421
0.5 Ω maximum on resistance flatness
Up to 250 mA continuous current
Fully specified at +12 V, 15 V, 5 V
No VL supply required
S1
IN1
D1
D2
IN2
S2
3 V logic-compatible inputs
Rail-to-rail operation
10-lead MSOP and 10-lead, 3 mm × 3 mm LFCSP packages
SWITCHES SHOWN FOR A LOGIC 0 INPUT
Figure 1. ADG1421 Functional Block Diagram
APPLICATIONS
Automatic test equipment
Data acquisition systems
Relay replacements
ADG1422
S1
IN1
D1
Battery-powered systems
Sample-and-hold systems
Audio signal routing
D2
IN2
S2
Video signal routing
Communication systems
SWITCHES SHOWN FOR A LOGIC 0 INPUT
Figure 2. ADG1422 Functional Block Diagram
GENERAL DESCRIPTION
The ADG1421/ADG1422/ADG1423 contain two independent
single-pole/single-throw (SPST) switches. The ADG1421 and
ADG1422 differ only in that the digital control logic is inverted.
The ADG1421 switches are turned on with Logic 1 on the
appropriate control input, and Logic 0 is required for the
ADG1422. The ADG1423 has one switch with digital control
logic similar to that of the ADG1421; the logic is inverted on
the other switch. The ADG1423 exhibits break-before-make
switching action for use in multiplexer applications. Each
switch conducts equally well in both directions when on and
has an input signal range that extends to the supplies. In the
off condition, signal levels up to the supplies are blocked.
ADG1423
S1
IN1
D1
D2
IN2
S2
SWITCHES SHOWN FOR A LOGIC 0 INPUT
Figure 3. ADG1423 Functional Block Diagram
The on resistance profile is very flat over the full analog input
range ensuring excellent linearity and low distortion when
switching audio signals. The iCMOS construction ensures
ultralow power dissipation, making the part ideally suited for
portable and battery-powered instruments.
The iCMOS® (industrial CMOS) modular manufacturing process
combines high voltage, complementary metal-oxide semiconductor
(CMOS) and bipolar technologies. It enables the development
of a wide range of high performance analog ICs capable of 33 V
operation in a footprint that no other generation of high voltage
parts has achieved. Unlike analog ICs using conventional CMOS
processes, iCMOS components can tolerate high supply voltages
while providing increased performance, dramatically lower
power consumption, and reduced package size.
PRODUCT HIGHLIGHTS
1. 2.4 Ω maximum on resistance at 25°C.
2. Minimum distortion.
3. 3 V logic-compatible digital inputs: VINH = 2.0 V, VINL = 0.8 V.
4. No VL logic power supply required.
5. 10-lead MSOP and 10-lead, 3 mm × 3 mm LFCSP packages.
Rev. 0
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