DATASHEET

DATASHEET
Low-Voltage, Single Supply, Dual SPST Analog Switches
ISL43120, ISL43121, ISL43122
Features
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
currents (100pA max) and fast switching speeds (tON = 28ns,
tOFF = 20ns). Cell phones, for example, often face ASIC
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.
• Fully specified at 12V, 5V, and 3.3V supplies for 10%
tolerances
The ISL43120, ISL43121, ISL43122 are dual
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.
• Low charge injection. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5pC (Max)
• Single supply operation . . . . . . . . . . . . . . . . . . . . . . +2.7V to +12V
• Low power consumption (PD) . . . . . . . . . . . . . . . . . . . . . . . . .<5µW
• Low leakage current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10nA
• Fast switching action
- tON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28ns
- tOFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20ns
• Guaranteed break-before-make (ISL43122 only)
• Minimum 2000V ESD protection per method 3015.7
• TTL, CMOS compatible
• Available in SOT-23 packaging
• Pb-free (RoHS Compliant)
TABLE 1. FEATURES AT A GLANCE
ISL43120
ISL43121
ISL43122
SW 1/SW 2
NO/NO
NC/NC
NO/NC
3.3V rON
32Ω
32Ω
32Ω
3.3V tON/tOFF
40ns/20ns
40ns/20ns
40ns/20ns
5V rON
19Ω
19Ω
19Ω
5V tON/tOFF
28ns/20ns
28ns/20ns
28ns/20ns
12V rON
11Ω
11Ω
11Ω
12V tON/tOFF
25ns/17ns
25ns/17ns
25ns/17ns
Packages
• ON-resistance (rON) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Ω
• rON matching between channels . . . . . . . . . . . . . . . . . . . . . . . <1Ω
8 Ld SOT-23
Related Literature
• TB363 “Guidelines for Handling and Processing Moisture
Sensitive Surface Mount Devices (SMDs)”
Applications
• Battery-powered, handheld and portable equipment
- Cellular/mobile phones
- Pagers
- Laptops, notebooks, palmtops
• Communications systems
- Radios, ADSL Modems
- PBX, PABX
• Test and measurement equipment
- Ultrasound
- 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”
• 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
August 17, 2015
FN6033.6
1
• Audio and video switching
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2003-2005, 2007, 2015. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
ISL43120, ISL43121, ISL43122
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
PART
MARKING
PACKAGE
(RoHS Compliant)
TEMP. RANGE (°C)
PKG.
DWG. #
120Z (Note 4)
-40 to +85
8 Ld SOT-23
P8.064
ISL43121IHZ-T (No longer available, 121Z (Note 4)
recommended replacement:
ISL43120IHZ-T)
-40 to +85
8 Ld SOT-23
P8.064
ISL43122IHZ-T (No longer available, 122Z (Note 4)
recommended replacement:
ISL43120IHZ-T)
-40 to +85
8 Ld SOT-23
P8.064
ISL43120IHZ-T
NOTES:
1. Please refer to TB347 for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte
tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil
Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), please see product information page for ISL43120, ISL43121, ISL43122. For more information on MSL, please
see tech brief TB363.
4. The part marking is located on the bottom of the part.
Pin Configurations
(Note 5)
8 COM1
NO1 1
ISL43122
(8 LD SOT-23)
TOP VIEW
ISL43121
(8 LD SOT-23)
TOP VIEW
ISL43120
(8 LD SOT-23)
TOP VIEW
8 COM1
NC1 1
8 COM1
NO1 1
V+ 2
7 IN1
V+ 2
7 IN1
V+ 2
7 IN1
IN2 3
6 GND
IN2 3
6 GND
IN2 3
6 GND
COM2 4
5 NO2
COM2 4
5 NC2
COM2 4
5 NC2
NOTE:
5. Switches Shown for Logic “0” Input.
Truth Table
ISL43120
ISL43121
ISL43122
IN1
IN2
NO1
NO2
NC1
NC2
NO1
NC2
0
0
OFF
OFF
ON
ON
OFF
ON
0
1
OFF
ON
ON
OFF
OFF
OFF
1
0
ON
OFF
OFF
ON
ON
ON
1
1
ON
ON
OFF
OFF
ON
OFF
NOTE: Logic “0” 0.8V. Logic “1” 2.4V.
Pin Descriptions
ISL43120
PIN NUMBER
ISL43121
PIN NUMBER
ISL43122
PIN NUMBER
2
2
2
V+
6
6
6
GND
Ground Connection
3, 7
3, 7
3, 7
INx
Digital Control Input
4, 8
4, 8
4, 8
COMx
1
NOx
Analog Switch Normally Open Pin
5
NCx
Analog Switch Normally Closed Pin
1, 5
1, 6
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PIN NAME
FUNCTION
System Power Supply Input (+2.7V to +12V)
Analog Switch Common Pin
FN6033.6
August 17, 2015
ISL43120, ISL43121, ISL43122
Absolute Maximum Ratings
Thermal Information
V+ to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 15V
Input Voltages
IN (Note 6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to ((V+) + 0.3V)
NO, NC (Note 6). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to ((V+) + 0.3V)
Output Voltages
COM (Note 6). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to ((V+) + 0.3V)
Continuous Current (Any Terminal) . . . . . . . . . . . . . . . . . . . . . . . . . . . 30mA
Peak Current NO, NC, or COM
(Pulsed 1ms, 10% Duty Cycle, Max). . . . . . . . . . . . . . . . . . . . . . . . . . . 40mA
ESD Rating
Human Body Model (Per MIL-STD-883 Method 3015) . . . . . . . . . . >2kV
Thermal Resistance (Typical, Note 7)
JA (°C/W)
8 Ld SOT-23 Package. . . . . . . . . . . . . . . . . . . . . . . . . . . .
215
Maximum Junction Temperature (Plastic Package) . . . . . . . . . . . +150°C
Maximum Storage Temperature Range. . . . . . . . . . . . . . . . . -65°C to +150°C
Pb-free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see TB493
Recommended Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product
reliability and result in failures not covered by warranty.
NOTES:
6. Signals on NC, NO, COM, or IN exceeding V+ or GND are clamped by internal diodes. Limit forward diode current to maximum current ratings.
7. JA is measured with the component mounted on a low effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
Electrical Specifications - 5V Supply
V+ = +4.5V to +5.5V, GND = 0V, VINH = 2.4V, VINL = 0.8V (Note 8), unless otherwise
specified. Boldface limits apply across the operating temperature range, -40°C to +85°C.
PARAMETER
TEST CONDITIONS
TEMP
MIN
(°C) (Notes 9, 10)
TYP
MAX
(Notes 9, 10) UNIT
ANALOG SWITCH CHARACTERISTICS
Analog Signal Range, VANALOG
V+ = 4.5V, ICOM = 1.0mA, VNO or VNC = 3.5V
(see Figure 5)
ON-resistance, rON
Full
0
-
V+
V
25
-
19
30
Ω
Full
-
23
40
Ω
25
-
0.8
2
Ω
Full
-
1
4
Ω
rON Matching Between Channels,
rON
V+ = 5V, ICOM = 1.0mA, VNO or VNC = 3.5V
rON Flatness, rFLAT(ON)
V+ = 5V, ICOM = 1.0mA, VNO or VNC = 1V, 2V, 3V
Full
-
7
8
Ω
NO or NC OFF Leakage Current,
INO(OFF) or INC(OFF)
V+ = 5.5V, VCOM = 1V, 4.5V, VNO or VNC = 4.5V, 1V
25
-0.1
0.01
0.1
nA
COM OFF Leakage Current, ICOM(OFF) V+ = 5.5V, VCOM = 4.5V, 1V, VNO or VNC = 1V, 4.5V
COM ON Leakage Current, ICOM(ON)
V = 5.5V, VCOM = 1V, 4.5V, or VNO or VNC = 1V, 4.5V, or
Floating
Full
-5
-
5
nA
25
-0.1
-
0.1
nA
Full
-5
-
5
nA
25
-0.2
-
0.2
nA
Full
-10
-
10
nA
DYNAMIC CHARACTERISTICS
VNO or VNC = 3V, RL =1kΩ, CL = 35pF, VIN = 0V to 3V
(see Figure 1, Note 11)
Turn-ON Time, tON
VNO or VNC = 3V, RL =1kΩ, CL = 35pF, VIN = 0V to 3V
(see Figure 1, Note 11)
Turn-OFF Time, tOFF
25
-
28
75
ns
Full
-
40
150
ns
25
-
20
50
ns
Full
-
30
100
ns
10
-
ns
Break-Before-Make Time Delay
(ISL43122 only), tD
RL = 300Ω, CL = 35pF, VNO = VNC = 3V, VIN = 0V to 3V
(see Figure 3, Note 11)
Full
3
Charge Injection, Q
CL = 1.0nF, VG = 0V, RG = 0 (see Figure 2, Note 11)
25
-
3
5
pC
OFF Isolation
RL = 50Ω, CL = 5pF, f = 1MHz (see Figure 4)
25
-
76
-
dB
Crosstalk (Channel-to-Channel)
RL = 50Ω, CL = 5pF, f = 1MHz (see Figure 6)
25
-
-105
-
dB
Power Supply Rejection Ratio
RL = 50Ω, CL = 5pF, f = 1MHz
25
-
60
-
dB
NO or NC OFF Capacitance, COFF
f = 1MHz, VNO or VNC = VCOM = 0V (see Figure 7)
25
-
8
-
pF
COM OFF Capacitance, CCOM(OFF)
f = 1MHz, VNO or VNC = VCOM = 0V (see Figure 7)
25
-
8
-
pF
COM ON Capacitance, CCOM(ON)
f = 1MHz, VNO or VNC = VCOM = 0V (see Figure 7)
25
-
21
-
pF
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FN6033.6
August 17, 2015
ISL43120, ISL43121, ISL43122
Electrical Specifications - 5V Supply
V+ = +4.5V to +5.5V, GND = 0V, VINH = 2.4V, VINL = 0.8V (Note 8), unless otherwise
specified. Boldface limits apply across the operating temperature range, -40°C to +85°C. (Continued)
PARAMETER
TEST CONDITIONS
TEMP
MIN
(°C) (Notes 9, 10)
TYP
MAX
(Notes 9, 10) UNIT
POWER SUPPLY CHARACTERISTICS
Power Supply Range
V+ = 5.5V, VIN = 0V or V+, all channels on or off
Positive Supply Current, I+
Full
2.7
-
12
V
Full
-1
0.0001
1
µA
Full
-
-
0.8
V
Full
2.4
-
-
V
Full
-1
-
1
µA
DIGITAL INPUT CHARACTERISTICS
Input Voltage Low, VINL
Input Voltage High, VINH
Input Current, IINH, IINL
V+ = 5.5V, VIN = 0V or V+
Electrical Specifications - 3.3V Supply V+ = +3.0V to +3.6V, GND = 0V, VINH = 2.4V, VINL = 0.8V (Note 8), unless otherwise
specified. Boldface limits apply across the operating temperature range, -40°C to +85°C.
PARAMETER
TEST CONDITIONS
TEMP
MIN
(°C) (Notes 9, 10)
TYP
MAX
(Notes 9, 10)
UNIT
ANALOG SWITCH CHARACTERISTICS
Analog Signal Range, VANALOG
ON-resistance, rON
V+ = 3V, ICOM = 1.0mA, VNO or VNC = 1.5V
rON Matching Between Channels,
rON
V+ = 3.3V, ICOM = 1.0mA, VNO or VNC = 1.5V
rON Flatness, rFLAT(ON)
V+ = 3.3V, ICOM = 1.0mA, VNO or VNC = 0.5V, 1V, 1.5V
NO or NC OFF Leakage Current,
INO(OFF) or INC(OFF)
V+ = 3.6V, VCOM = 1V, 3V, VNO or VNC = 3V, 1V
COM OFF Leakage Current, ICOM(OFF)
V+ = 3.6V, VCOM = 3V, 1V, VNO or VNC = 1V, 3V
COM ON Leakage Current, ICOM(ON)
V = 3.6V, VCOM = 1V, 3V, or VNO or VNC = 1V, 3V, or floating
Full
0
-
V+
V
25
-
32
50
Ω
Full
-
40
60
Ω
25
-
0.8
2
Ω
Full
-
1
4
Ω
25
-
6
8
Ω
Full
-
7
12
Ω
25
-0.1
0.01
0.1
nA
Full
-5
-
5
nA
25
-0.1
0.01
0.1
nA
Full
-5
-
5
nA
25
-0.2
-
0.2
nA
Full
-10
-
10
nA
DYNAMIC CHARACTERISTICS
Turn-ON Time, tON
Turn-OFF Time, tOFF
VNO or VNC = 1.5V, RL = 1kΩ, CL = 35pF,
VIN = 0V to 3V (Note 11)
25
-
40
120
ns
Full
-
60
200
ns
VNO or VNC = 1.5V, RL = 1kΩ, CL = 35pF,
VIN = 0V to 3V (Note 11)
25
-
20
50
ns
Full
-
30
120
ns
Full
3
20
-
ns
RL = 300Ω, CL = 35pF, VNO or VNC = 1.5V,
VIN = 0V to 3V (Note 11)
Break-before-make Time Delay
(ISL43122 only), tD
Charge Injection, Q
CL = 1.0nF, VG = 0V, RG = 0ΩNote 11)
25
-
1
5
pC
OFF-isolation
RL = 50Ω, CL = 5pF, f = 1MHz
25
-
76
-
dB
Crosstalk (Channel-to-channel)
RL = 50Ω, CL = 5pF, f = 1MHz
25
-
-105
-
dB
Power Supply Rejection Ratio
RL = 50Ω, CL = 5pF, f = 1MHz
25
-
56
-
dB
NO or NC OFF Capacitance, COFF
f = 1MHz, VNO or VNC = VCOM = 0V
25
-
8
-
pF
COM OFF Capacitance, CCOM(OFF)
f = 1MHz, VNO or VNC = VCOM = 0V
25
-
8
-
pF
COM ON Capacitance, CCOM(ON)
f = 1MHz, VNO or VNC = VCOM = 0V (See Figure 7)
25
-
21
-
pF
V+ = 3.6V, VIN = 0V or V+, all channels on or off
Full
-1
-
1
µA
POWER SUPPLY CHARACTERISTICS
Positive Supply Current, I+
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FN6033.6
August 17, 2015
ISL43120, ISL43121, ISL43122
Electrical Specifications - 3.3V Supply V+ = +3.0V to +3.6V, GND = 0V, VINH = 2.4V, VINL = 0.8V (Note 8), unless otherwise
specified. Boldface limits apply across the operating temperature range, -40°C to +85°C. (Continued)
PARAMETER
TEST CONDITIONS
TEMP
MIN
(°C) (Notes 9, 10)
TYP
MAX
(Notes 9, 10)
UNIT
DIGITAL INPUT CHARACTERISTICS
Input Voltage Low, VINL
Full
-
-
0.8
V
Input Voltage High, VINH
Full
2.4
-
-
V
Full
-1
-
1
µA
Input Current, IINH, IINL
V+ = 3.6V, VIN = 0V or V+
Electrical Specifications - 12V Supply
V+ = +10.8V to +13V, GND = 0V, VINH = 2.4V, VINL = 0.8V (Note 8), unless otherwise
specified. Boldface limits apply across the operating temperature range, -40°C to +85°C.
PARAMETER
TEST CONDITIONS
MAX
(Notes 9, 10) UNIT
TEMP
(°C)
MIN
(Notes 9, 10)
TYP
Full
0
-
V+
V
ANALOG SWITCH CHARACTERISTICS
Analog Signal Range, VANALOG
ON-resistance, rON
V+ = 10.8V, ICOM = 1.0mA, VNO or VNC = 10V
rON Matching Between Channels, rON V+ = 12V, ICOM = 1.0mA, VNO or VNC = 10V
rON Flatness, rFLAT(ON)
V+ = 12V, ICOM = 1.0mA, VNO or VNC = 3V, 6V, 9V
NO or NC OFF Leakage Current,
INO(OFF) or INC(OFF)
V+ = 13V, VCOM = 1V, 12V, VNO or VNC = 12V, 1V
COM OFF Leakage Current, ICOM(OFF)
V+ = 13V, VCOM = 12V, 1V, VNO or VNC = 1V, 12V
COM ON Leakage Current, ICOM(ON)
V = 13V, VCOM = 1V, 12V, or VNO or VNC = 1V, 12V, or
floating
25
-
11
20
Ω
Full
-
15
25
Ω
25
-
0.8
2
Ω
Full
-
1
4
Ω
25
-
1
4
Ω
Full
-
-
6
Ω
25
-0.1
0.01
0.1
nA
Full
-5
-
5
nA
25
-0.1
0.01
0.1
nA
Full
-5
-
5
nA
25
-0.2
-
0.2
nA
Full
-10
-
10
nA
25
-
25
35
ns
Full
-
35
55
ns
25
-
17
30
ns
50
DYNAMIC CHARACTERISTICS
Turn-ON Time, tON
VNO or VNC = 10V, RL = 1kΩ, CL = 35pF, VIN = 0V to 4V
(Note 11)
Turn-OFF Time, tOFF
VNO or VNC = 10V, RL = 1kΩ, CL = 35pF, VIN = 0V to 4V
(Note 11)
Full
-
26
Break-before-make Time Delay
(ISL43122 only), tD
RL = 300Ω, CL = 35pF, VNO or VNC = 10V,
VIN = 0 to 4V
Full
0
2
Charge Injection, Q
CL = 1.0nF, VG = 0V, RG = 0(Note 11)
25
-
5
ns
ns
15
pC
OFF-isolation
RL = 50Ω, CL = 5pF, f = 1MHz
25
-
76
-
dB
Crosstalk (Channel-to-channel)
RL = 50Ω, CL = 5pF, f = 1MHz
25
-
-105
-
dB
Power Supply Rejection Ratio
RL = 50Ω, CL = 5pF, f = 1MHz
25
-
63
-
dB
NO or NC OFF Capacitance, COFF
f = 1MHz, VNO or VNC = VCOM = 0V
25
-
8
-
pF
COM OFF Capacitance, CCOM(OFF)
f = 1MHz, VNO or VNC = VCOM = 0V
25
-
8
-
pF
COM ON Capacitance, CCOM(ON)
f = 1MHz, VNO or VNC = VCOM = 0V (see Figure 7)
25
-
21
-
pF
V+ = 13V, VIN = 0V or V+, all channels on or off
Full
-1
-
1
µA
POWER SUPPLY CHARACTERISTICS
Positive Supply Current, I+
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FN6033.6
August 17, 2015
ISL43120, ISL43121, ISL43122
Electrical Specifications - 12V Supply
V+ = +10.8V to +13V, GND = 0V, VINH = 2.4V, VINL = 0.8V (Note 8), unless otherwise
specified. Boldface limits apply across the operating temperature range, -40°C to +85°C. (Continued)
PARAMETER
TEMP
(°C)
TEST CONDITIONS
MIN
(Notes 9, 10)
TYP
MAX
(Notes 9, 10) UNIT
DIGITAL INPUT CHARACTERISTICS
Input Voltage Low, VINL
Full
-
-
0.8
V
Input Voltage High, VINH
Full
4
-
-
V
Full
-1
-
1
µA
Input Current, IINH, IINL
V+ = 13V, VIN = 0V or V+
NOTES:
8. VIN = input voltage to perform proper function.
9. The algebraic convention, whereby the most negative value is a minimum and the most positive a maximum, is used in this data sheet.
10. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design.
11. Limits established by characterization and are not production tested.
Test Circuits and Waveforms
V+
tr < 20ns
tf < 20ns
3V OR 4V
LOGIC
INPUT
50%
0V
tOFF
SWITCH
INPUT VNO
SWITCH
INPUT
VOUT
VOUT
NO OR NC
COM
IN
90%
SWITCH
OUTPUT
C
90%
0V
LOGIC
INPUT
CL
35pF
RL
1k
GND
tON
Logic input waveform is inverted for switches that have the opposite
logic sense.
Repeat test for all switches. CL includes fixture and stray
capacitance.
RL
V OUT = V (NO or NC) -----------------------R L + r ON
FIGURE 1B. TEST CIRCUIT
FIGURE 1A. MEASUREMENT POINTS
FIGURE 1. SWITCHING TIMES
V+
SWITCH
OUTPUT
VOUT
RG
VOUT
V+
LOGIC
INPUT
ON
ON
OFF
VG
NO OR NC
GND
C
VOUT
COM
IN
CL
0V
LOGIC
INPUT
Q = VOUT x CL
FIGURE 2B. TEST CIRCUIT
FIGURE 2A. MEASUREMENT POINTS
FIGURE 2. CHARGE INJECTION
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6
FN6033.6
August 17, 2015
ISL43120, ISL43121, ISL43122
Test Circuits and Waveforms (Continued)
V+
3V OR 4V
LOGIC
INPUT
0V
C
VOUT1
NO1
VNX
COM1
NC2
90%
SWITCH
OUTPUT
VOUT1
IN1
0V
RL2
300Ω
IN2
90%
SWITCH
OUTPUT
VOUT2
0V
LOGIC
INPUT
VOUT2 RL1
300Ω
COM2
CL1
35pF
CL2
35pF
GND
tD
tD
CL includes fixture and stray capacitance.
FIGURE 3B. TEST CIRCUIT (ISL43122 ONLY)
FIGURE 3A. MEASUREMENT POINTS (ISL43122 ONLY)
FIGURE 3. BREAK-BEFORE-MAKE TIME
V+
V+
C
C
rON = V1/1mA
SIGNAL
GENERATOR
NO OR NC
NO OR NC
VNX
INX
0V OR VINH
1mA
0.8V OR VINH
COM
COM
ANALYZER
IN
V1
GND
GND
RL
FIGURE 5. rON TEST CIRCUIT
FIGURE 4. OFF-ISOLATION TEST CIRCUIT
V+
C
V+
C
SIGNAL
GENERATOR
NO1 OR NC1
COM1
50
NO OR NC
IN1
COM2
ANALYZER
INX
IN2 0V OR VINH
0V OR 2.4V
NO2 OR NC2
GND
0V OR VINH
IMPEDANCE
ANALYZER
COM
NC
GND
RL
FIGURE 6. CROSSTALK TEST CIRCUIT
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7
FIGURE 7. CAPACITANCE TEST CIRCUIT
FN6033.6
August 17, 2015
ISL43120, ISL43121, ISL43122
Detailed Description
Power-Supply Considerations
The ISL43120, ISL43121, ISL43122 bidirectional dual SPST
analog switches offer precise switching capability from a
single 2.7V to 12V supply with low ON-resistance (19Ω) and
high speed operation (tON = 28ns, tOFF = 20ns). The devices
are especially well suited to portable battery-powered
equipment thanks to the low operating supply voltage (2.7V),
low power consumption (5µW), low leakage currents
(100pA max), and the tiny SOT-23 packaging. High frequency
applications also benefit from the wide bandwidth, and the very
high off-isolation and crosstalk rejection.
Supply Sequencing and Overvoltage
Protection
With any CMOS device, proper power supply sequencing is
required to protect the device from excessive input currents,
which might permanently damage the IC. All I/O pins contain
ESD protection diodes from the pin to V+ and GND
(see Figure 8). To prevent forward biasing these diodes, V+
must be applied before any input signals, and input signal
voltages must remain between V+ and GND. If these
conditions cannot be guaranteed, then one of the following
two protection methods should be employed.
Logic inputs can easily be protected by adding a 1kΩ resistor in
series with the input (see Figure 8). The resistor limits the input
current below the threshold that produces permanent
damage, and the sub-microamp input current produces an
insignificant voltage drop during normal operation.
Adding a series resistor to the switch input defeats the purpose
of using a low rON switch, so two small signal diodes can be
added in series with the supply pins to provide overvoltage
protection for all pins (see Figure 8). These additional diodes
limit the analog signal from 1V below V+ to 1V above GND. The
low leakage current performance is unaffected by this
approach, but the switch resistance may increase, especially
at low supply voltages.
OPTIONAL PROTECTION
DIODE
V+
OPTIONAL
PROTECTION
RESISTOR
INX
VNO OR NC
VCOM
GND
OPTIONAL PROTECTION
DIODE
The ISL43120, ISL43121, ISL43122 construction is typical of
most CMOS analog switches, except that they have only two
supply pins: V+ and GND. V+ and GND drive the internal CMOS
switches and set their analog voltage limits. Unlike switches
with a 13V maximum supply voltage, the ISL43120,
ISL43121, ISL43122 15V maximum supply voltage provides
plenty of room for the 10% tolerance of 12V supplies, as well
as room for overshoot and noise spikes.
The minimum recommended supply voltage is 2.7V. It is
important to note that the input signal range, switching times,
and ON-resistance degrade at lower supply voltages. Refer to
the “Electrical Specifications” tables starting on page 3 and
“Typical Performance Curves” (starting on page 9) for details.
V+ and GND also power the internal logic and level shifter. The
level shifter convert the input logic levels to switched V+ and
GND signals to drive the analog switch gate terminals.
This family of switches cannot be operated with bipolar
supplies, because the input switching point becomes negative
in this configuration.
Logic-level Thresholds
This switch family is TTL compatible (0.8V and 2.4V) over a
supply range of 3V to 11V (see Figure 15). At 12V the VIH level
is about 2.5V. This is still below the TTL guaranteed high output
minimum level of 2.8V, but noise margin is reduced. For best
results with a 12V supply, use a logic family the provides a VOH
greater than 3V.
The digital input stages draw supply current whenever the
digital input voltage is not at one of the supply rails. Driving the
digital input signals from GND to V+ with a fast transition time
minimizes power dissipation.
High-frequency Performance
In 50Ω systems, signal response is reasonably flat even past
300MHz (see Figure 16). Figure 16 also illustrates that the
frequency response is very consistent over a wide V+ range,
and for varying analog signal levels.
An OFF switch acts like a capacitor and passes higher
frequencies with less attenuation, resulting in signal
feedthrough from a switch’s input to its output. Off-isolation is
the resistance to this feedthrough, while crosstalk indicates
the amount of feedthrough from one switch to another.
Figure 17 details the high off-isolation and crosstalk rejection
provided by this family. At 10MHz, off isolation is about 50dB
in 50Ω systems, decreasing approximately 20dB per decade
as frequency increases. Higher load impedances decrease off
isolation and crosstalk rejection due to the voltage divider
action of the switch OFF impedance and the load impedance.
FIGURE 8. OVERVOLTAGE PROTECTION
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FN6033.6
August 17, 2015
ISL43120, ISL43121, ISL43122
Leakage Considerations
Reverse ESD protection diodes are internally connected between
each analog-signal pin and both V+ and GND. One of these diodes
conducts if any analog signal exceeds V+ or GND.
Virtually all the analog leakage current comes from the ESD
diodes to V+ or GND. Although the ESD diodes on a given signal
pin are identical and therefore fairly well balanced, they are
reverse biased differently. Each is biased by either V+ or GND and
the analog signal. This means their leakages will vary as the
signal varies. The difference in the two diode leakages to the V+
and GND pins constitutes the analog-signal-path leakage current.
All analog leakage current flows between each pin and one of the
supply terminals, not to the other switch terminal. This is why both
sides of a given switch can show leakage currents of the same or
opposite polarity. There is no connection between the analog
signal paths and V+ or GND.
Typical Performance Curves TA = +25°C, unless otherwise specified.
40
45
40
35
35
V+ = 3.3V
30
30
20
25
rON (Ω)
rON (Ω)
+85°C
+25°C
25
+85°C
20
+25°C
15
-40°C
10
-40°C
15
30
25
20
15
10
20
15
V+ = 5V
+85°C
+25°C
-40°C
+85°C
V+ = 12V
+25°C
10
5 -40°C
0
5
3
4
5
6
7
8
V+ (V)
9
10
11
12
13
FIGURE 9. ON-RESISTANCE vs SUPPLY VOLTAGE
0.50
0.40
0.30
2
4
6
VCOM (V)
8
10
12
FIGURE 10. ON-RESISTANCE vs SWITCH VOLTAGE
60
V+ = 3.3V
+25°C
50
+85°C
0.10
0
0.25
0.20
0.15
30
V+ = 5V
+25°C
0.10
+85°C
+85°C
0.05
0
0.15
V+ = 12V
+25°C
-40°C
0.05
2
4
V+ = 12V
V+ = 3.3V
0
+25°C
6
VCOM (V)
8
10
FIGURE 11. rON MATCH vs SWITCH VOLTAGE
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V+ = 5V
-10
+85°C
-40°C
0
20
10
-40°C
0.10
0
40
-40°C
Q (pC)
rON (Ω)
0.20
9
12
-20
0
2
4
6
8
10
12
VCOM (V)
FIGURE 12. CHARGE INJECTION vs SWITCH VOLTAGE
FN6033.6
August 17, 2015
ISL43120, ISL43121, ISL43122
Typical Performance Curves TA = +25°C, unless otherwise specified. (Continued)
35
100
90
30
80
+85°C
tOFF (ns)
tON (ns)
70
60
+85°C
25
50
-40°C
-40°C
40
20
-40°C
+25°C
30
20
25°C
2
3
4
15
5
6
7
V+ (V)
8
9
10
11
12
3.0
2.5
2.0
4
5
6
7
V+ (V)
8
9
10
11
12
+85°C
V+ = 3.3V TO 12V
0
GAIN
-3
-6
0
PHASE
20
+25°C
1.5
+85°C
40
-40°C
60
+25°C
1.0
RL = 50
VIN = 0.2VP-P TO 2.5VP-P (V+ = 3.3V)
VIN = 0.2VP-P TO 4VP-P (V+ = 5V)
VIN = 0.2VP-P TO 5VP-P (V+ = 12V)
VINL
+85°C
0.5
2
3
4
5
6
7
8
V+ (V)
9
10
11
12
FIGURE 15. DIGITAL SWITCHING POINT vs SUPPLY VOLTAGE
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10
13
1M
10M
100M
FREQUENCY (Hz)
80
PHASE (°)
VINH AND VINL (V)
VINH
-40°C
3
FIGURE 14. TURN-OFF TIME vs SUPPLY VOLTAGE
NORMALIZED GAIN (dB)
FIGURE 13. TURN-ON TIME vs SUPPLY VOLTAGE
2
100
600M
FIGURE 16. FREQUENCY RESPONSE
FN6033.6
August 17, 2015
ISL43120, ISL43121, ISL43122
Typical Performance Curves TA = +25°C, unless otherwise specified. (Continued)
-10
10
RL = 50
-20
20
0
-30
30
10
-40
40
20
-50
50
60
ISOLATION
-70
70
-80
80
-90
CROSSTALK
-100
-110
1k
10k
100k
1M
10M
±PSRR (dB)
-60
V+ = 3.3V, SWITCH OFF
OFF ISOLATION (dB)
CROSSTALK (dB)
V+ = 3V TO 13V
40
V+ = 12V, SWITCH ON
50
60
90
70
100
80
110
100M 500M
V+ = 12V, SWITCH OFF
30
0.3k
V+ = 3.3V, SWITCH ON
1M
10M
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE 17. CROSSTALK AND OFF-ISOLATION
FIGURE 18. ±PSRR vs FREQUENCY
1G
Die Characteristics
SUBSTRATE POTENTIAL (POWERED UP):
GND
TRANSISTOR COUNT:
ISL43120: 66
ISL43121: 66
ISL43122: 66
PROCESS:
Si Gate CMOS
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FN6033.6
August 17, 2015
ISL43120, ISL43121, ISL43122
Revision History
The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to the web to make sure that
you have the latest revision.
DATE
REVISION
CHANGE
August 17, 2015
FN6033.7
Updated Ordering Information table on page 2.
May 28, 2015
FN6033.6
Added Rev History beginning with Rev 6.
Updated entire datasheet applying Intersil’s new standards.
Updated Ordering information by removing obsolete parts, adding MSL and part marking notes.
About Intersil
Intersil Corporation is a leading provider of innovative power management and precision analog solutions. The company's products
address some of the largest markets within the industrial and infrastructure, mobile computing and high-end consumer markets.
For the most updated datasheet, application notes, related documentation and related parts, please see the respective product
information page found at www.intersil.com.
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Reliability reports are also available from our website at www.intersil.com/support
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FN6033.6
August 17, 2015
ISL43120, ISL43121, ISL43122
Small Outline Transistor Plastic Packages (SOT23-8)
0.20 (0.008) M
CL
6
7
5
CL
E
2
8 LEAD SMALL OUTLINE TRANSISTOR PLASTIC PACKAGE
INCHES
CL
1
P8.064
VIEW C
e
b
8
C
3
E1
4
e1
C
D
CL
A
A2
SEATING
PLANE
A1
-C-
SYMBOL
MIN
MAX
MIN
MAX
NOTES
A
0.036
0.057
0.90
1.45
-
A1
0.000
0.0059
0.00
0.15
-
A2
0.036
0.051
0.90
1.30
-
b
0.009
0.015
0.22
0.38
b1
0.009
0.013
0.22
0.33
c
0.003
0.009
0.08
0.22
6
c1
0.003
0.008
0.08
0.20
6
D
0.111
0.118
2.80
3.00
3
E
0.103
0.118
2.60
3.00
-
E1
0.060
0.067
1.50
1.70
3
e
e1
L
0.10 (0.004) C
MILLIMETERS
0.0256 Ref
0.65 Ref
0.0768 Ref
0.014
1.95 Ref
0.022
0.35
0.024 Ref.
0.60 Ref.
L2
0.010 Ref.
0.25 Ref.
8
-
8
5
WITH
b
R
0.004
-
0.10
-
PLATING
b1
R1
0.004
0.010
0.10
0.25

0o
8o
0o
8o
c
c1
4
0.55
L1
N
-
Rev. 2 9/03
NOTES:
BASE METAL
1. Dimensioning and tolerance per ASME Y14.5M-1994.
2. Package conforms to EIAJ SC-74 and JEDEC MO178BA.
4X 1
3. Dimensions D and E1 are exclusive of mold flash, protrusions, or
gate burrs.
4. Footlength L measured at reference to gauge plane.
R1
5. “N” is the number of terminal positions.
R
GAUGE PLANE
SEATING
PLANE
L
C
L1

6. These Dimensions apply to the flat section of the lead between
0.08mm and 0.15mm from the lead tip.
7. Controlling dimension: MILLIMETER. Converted inch dimensions
are for reference only
L2
4X 1
VIEW C
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in the quality certifications found at www.intersil.com/en/support/qualandreliability.html
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time
without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be
accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third
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FN6033.6
August 17, 2015
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