DATASHEET
ISL43120, ISL43121, ISL43122
Low-Voltage, Single Supply, Dual SPST Analog Switches
FN6033
Rev 7.00
Aug 17, 2015
The Intersil ISL43120, ISL43121 and ISL43122 devices are
precision, bidirectional, dual analog SPST switches designed to
operate from a single +2.7V to +12V supply. Targeted
applications include battery powered equipment that benefit
from the devices’ low power consumption (5µW), low leakage
Features
• Fully specified at 12V, 5V, and 3.3V supplies for 10%
tolerances
• ON-resistance (r ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Ω
ON
currents (100pA max) and fast switching speeds (t = 28ns,
ON
• r matching between channels . . . . . . . . . . . . . . . . . . . . . . . <1Ω
ON
t
= 20ns). Cell phones, for example, often face ASIC
OFF
• Low charge injection. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5pC (Max)
• Single supply operation . . . . . . . . . . . . . . . . . . . . . . +2.7V to +12V
functionality limitations. The number of analog input or GPIO
pins may be limited and digital geometries are not well suited to
analog switch performance. This family of parts may be used to
“mux-in” additional functionality while reducing ASIC design
risk. Some of the smallest packages are available, alleviating
board space limitations and making Intersil’s newest line of
low-voltage switches an ideal solution.
• Low power consumption (P ) . . . . . . . . . . . . . . . . . . . . . . . . .<5µW
D
• Low leakage current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10nA
• Fast switching action
- t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28ns
ON
The ISL43120, ISL43121, ISL43122 are dual
- t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20ns
OFF
single-pole/single-throw (SPST) devices. The ISL43120 has
two normally open (NO) switches; the ISL43121 has two
normally closed (NC) switches; the ISL43122 has one NO and
one NC switch and can be used as an SPDT.
• Guaranteed break-before-make (ISL43122 only)
• Minimum 2000V ESD protection per method 3015.7
• TTL, CMOS compatible
TABLE 1. FEATURES AT A GLANCE
• Available in SOT-23 packaging
• Pb-free (RoHS Compliant)
ISL43120
NO/NO
ISL43121
NC/NC
ISL43122
NO/NC
SW 1/SW 2
3.3V r
Applications
• Battery-powered, handheld and portable equipment
- Cellular/mobile phones
32Ω
32Ω
32Ω
ON
3.3V t /t
40ns/20ns
19Ω
40ns/20ns
19Ω
40ns/20ns
19Ω
ON OFF
- Pagers
5V r
ON
- Laptops, notebooks, palmtops
5V t /t
28ns/20ns
11Ω
28ns/20ns
11Ω
28ns/20ns
11Ω
ON OFF
• Communications systems
- Radios, ADSL Modems
- PBX, PABX
12V r
ON
12V t /t
25ns/17ns
25ns/17ns
8 Ld SOT-23
25ns/17ns
ON OFF
Packages
• Test and measurement equipment
- Ultrasound
Related Literature
• TB363 “Guidelines for Handling and Processing Moisture
Sensitive Surface Mount Devices (SMDs)”
- Computerized Tomography (CT) Scanner
- Magnetic Resonance Image (MRI)
- Position Emission Tomography (PET) Scanner
- Electrocardiograph
• AN557“Recommended Test Procedures for Analog
Switches”
• Heads-up displays
• TB401“Using the ISL43120 SPST Switch in a Multi-Phase
PWM Power Application”
• Audio and video switching
• Various circuits
- +3V/+5V DACs and ADCs
- Sample and hold circuits
- Digital filters
- Operational amplifier gain switching networks
- High frequency analog switching
- High speed multiplexing
- Integrator reset circuits
FN6033 Rev 7.00
Aug 17, 2015
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