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ISL43120, ISL43121, ISL43122, ISL43210
Data Sheet June 2003 FN6033.1
Low-Voltage, Single Supply, Dual SPST, SPDT Analog Switches
The Intersil ISL43120, ISL43121, ISL43122 and ISL43210 devices are precision, bidirectional, dual analog 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 (5W), 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. The ISL43120, ISL43121, ISL43122 are dual singlepole/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. The ISL43210 is a committed SPDT, which is perfect for use in 2-to-1 multiplexer applications.
TABLE 1. FEATURES AT A GLANCE ISL43120 ISL43121 ISL43122 Number of Switches SW 1 / SW 2 3.3V RON 3.3V tON/tOFF 5V RON 5V tON/tOFF 12V RON 12V tON/tOFF Packages 32 32 32 2 NO/NO 2 NC/NC 2 NO/NC ISL43210 1 SPDT or 2 x 1 MUX 32 40ns /20ns 19 28ns/20ns 11 25ns/17ns 6 Ld SOT-23
Features
* Fully specified at 12V, 5V, and 3.3V supplies for 10% tolerances * ON resistance (RON) . . . . . . . . . . . . . . . . . . . . . . . . . 19 * RON matching between channels . . . . . . . . . . . . . . . . . . <1 * Low charge injection . . . . . . . . . . . . . . . . . . . . . . . 5pC (Max) * Single supply operation . . . . . . . . . . . . . . . . . +2.7V to +12V * Low power consumption (PD) . . . . . . . . . . . . . . . . . . . .<5W * Low leakage current. . . . . . . . . . . . . . . . . . . . . . . . . 10nA * Fast switching action - tON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28ns - tOFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20ns * Guaranteed break-before-make (ISL43122/ISL43210 only) * Minimum 2000V ESD protection per method 3015.7 * TTL, CMOS compatible * Available in SOT-23 packaging
Applications
* Battery powered, handheld, and portable equipment - Cellular/mobile phones - Pagers - Laptops, notebooks, palmtops * Communications systems - Radios, ADSL Modems - PBX, PABX * Test & measurement equipment - Ultrasound - Computerized Tomography (CT) Scanner - Magnetic Resonance Image (MRI) - Position Emission Tomography (PET) Scanner - Electrocardiograph * Heads-up displays * Audio and video switching
40ns/20ns 40ns/20ns 40ns/20ns 19 19 19
28ns/20ns 28ns/20ns 28ns/20ns 11 11 11
25ns/17ns 25ns/17ns 25ns/17ns 8 Ld SOT-23
Related Literature
* Technical Brief TB363 "Guidelines for Handling and Processing Moisture Sensitive Surface Mount Devices (SMDs)" * Application Note AN557 "Recommended Test Procedures for Analog Switches"
* 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
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright (c) Intersil Americas Inc. 2003. All Rights Reserved All other trademarks mentioned are the property of their respective owners.
ISL43120, ISL43121, ISL43122, ISL43210 Pinouts
(Note 1) ISL43120 (SOT-23) TOP VIEW
NO1 1 V+ 2 IN2 3 COM2 4 8 COM1 7 IN1 6 GND 5 NO2
ISL43121 (SOT-23) TOP VIEW
NC1 1 V+ 2 IN2 3 COM2 4 8 COM1 7 IN1 6 GND 5 NC2
ISL43122 (SOT-23) TOP VIEW
NO1 1 V+ 2 IN2 3 COM2 4 8 COM1 7 IN1 6 GND 5 NC2
ISL43210 (SOT-23) TOP VIEW
IN 1 V+ 2 GND 3 6 NO 5 COM 4 NC
NOTE: 1. Switches Shown for Logic "0" Input.
Truth Table
ISL43120 ISL43121 LOGIC 0 1 NOTE: SW 1, 2 OFF ON SW 1, 2 ON OFF ISL43122 SW 1 OFF ON SW 2 ON OFF ISL43210 PIN NC PIN NO ON OFF OFF ON
Ordering Information
PART NO. (BRAND) ISL43120IH-T (120I) ISL43121IH-T (121I) ISL43122IH-T (122I) FUNCTION ISL43210IH-T (123I) TEMP. RANGE (oC) -40 to 85 -40 to 85 -40 to 85 -40 to 85 PACKAGE 8 Ld SOT-23 Tape and Reel 8 Ld SOT-23 Tape and Reel 8 Ld SOT-23 Tape and Reel 6 Ld SOT-23 Tape and Reel PKG. DWG. # P8.064 P8.064 P8.064 P6.064
Logic "0" 0.8V. Logic "1" 2.4V.
Pin Descriptions
PIN V+ GND IN COM NO NC N.C. System Power Supply Input (+2.7V to +12V) Ground Connection Digital Control Input Analog Switch Common Pin Analog Switch Normally Open Pin Analog Switch Normally Closed Pin No Internal Connection
2
ISL43120, ISL43121, ISL43122, ISL43210
Absolute Maximum Ratings
V+ to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to15V Input Voltages IN (Note 2). . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to ((V+) + 0.3V) NO, NC (Note 2) . . . . . . . . . . . . . . . . . . . . . . -0.3 to ((V+) + 0.3V) Output Voltages COM (Note 2) . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to ((V+) + 0.3V) Continuous Current (Any Terminal) . . . . . . . . . . . . . . . . . . . . . 30mA Peak Current NO, NC, or COM (Pulsed 1ms, 10% Duty Cycle, Max) . . . . . . . . . . . . . . . . . . 40mA ESD Rating (Per MIL-STD-883 Method 3015). . . . . . . . . . . . . .>2kV
Thermal Information
Thermal Resistance (Typical, Note 3) JA (oC/W) 6 Ld SOT-23 Package . . . . . . . . . . . . . . . . . . . . . . . 230 8 Ld SOT-23 Package . . . . . . . . . . . . . . . . . . . . . . . 215 Maximum Junction Temperature (Plastic Package) . . . . . . . 150oC Moisture Sensitivity (See Technical Brief TB363) Other Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Level 1 8 Ld SOT-23 Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . Level 2 Maximum Storage Temperature Range. . . . . . . . . . . . -65oC to 150oC Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300oC (Lead Tips Only)
Operating Conditions
Temperature Range ISL43XXXIH-T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40oC to 85oC
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES: 2. Signals on NC, NO, COM, or IN exceeding V+ or GND are clamped by internal diodes. Limit forward diode current to maximum current ratings. 3. 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
Test Conditions: V+ = +4.5V to +5.5V, GND = 0V, VINH = 2.4V, VINL = 0.8V (Note 4), Unless Otherwise Specified TEST CONDITIONS TEMP (oC) (NOTE 5) MIN TYP (NOTE 5) MAX UNITS
PARAMETER ANALOG SWITCH CHARACTERISTICS Analog Signal Range, VANALOG ON Resistance, RON RON Matching Between Channels, RON RON Flatness, RFLAT(ON) NO or NC OFF Leakage Current, INO(OFF) or INC(OFF) COM OFF Leakage Current, ICOM(OFF) COM ON Leakage Current, ICOM(ON) DYNAMIC CHARACTERISTICS Turn-ON Time, tON Turn-OFF Time, tOFF Break-Before-Make Time Delay (ISL43122, ISL43210), tD Charge Injection, Q OFF Isolation Crosstalk (Channel-to-Channel) Power Supply Rejection Ratio
Full V+ = 4.5V, ICOM = 1.0mA, VNO or VNC = 3.5V (See Figure 5) V+ = 5V, ICOM = 1.0mA, VNO or VNC= 3.5V V+ = 5V, ICOM = 1.0mA, VNO or VNC = 1V, 2V, 3V V+ = 5.5V, VCOM = 1V, 4.5V, VNO or VNC = 4.5V, 1V (Note 6) V+ = 5.5V, VCOM = 4.5V, 1V, VNO or VNC = 1V, 4.5V (Note 6) V+ = 5.5V, VCOM = 1V, 4.5V, or VNO or VNC = 1V, 4.5V, or Floating (Note 6) 25 Full 25 Full Full 25 Full 25 Full 25 Full
0 -0.1 -5 -0.1 -5 -0.2 -10
19 23 0.8 1 7 0.01 -
V+ 30 40 2 4 8 0.1 5 0.1 5 0.2 10
V nA nA nA nA nA nA
VNO or VNC = 3V, RL =1k, CL = 35pF, VIN = 0 to 3V (See Figure 1) VNO or VNC = 3V, RL =1k, CL = 35pF, VIN = 0 to 3V (See Figure 1) RL = 300, CL = 35pF, VNO = VNC = 3V, VIN = 0 to 3V (See Figure 3) CL = 1.0nF, VG = 0V, RG = 0 (See Figure 2) RL = 50, CL = 5pF, f = 1MHz (See Figure 4) RL = 50, CL = 5pF, f = 1MHz (See Figure 6) RL = 50, CL = 5pF, f = 1MHz f = 1MHz, VNO or VNC = VCOM = 0V (See Figure 7)
25 Full 25 Full Full 25 25 25 25 25 25
3 -
28 40 20 30 10 3 76 -105 60 8 8
75 150 50 100 5 -
ns ns ns ns ns pC dB dB dB pF pF
NO or NC OFF Capacitance, COFF f = 1MHz, VNO or VNC = VCOM = 0V (See Figure 7) COM OFF Capacitance, CCOM(OFF)
3
ISL43120, ISL43121, ISL43122, ISL43210
Electrical Specifications - 5V Supply
Test Conditions: V+ = +4.5V to +5.5V, GND = 0V, VINH = 2.4V, VINL = 0.8V (Note 4), Unless Otherwise Specified (Continued) TEST CONDITIONS f = 1MHz, VNO or VNC = VCOM = 0V (See Figure 7), ISL43120, ISL43121, ISL43122 f = 1MHz, VNO or VNC = VCOM = 0V (See Figure 7), ISL43210 POWER SUPPLY CHARACTERISTICS Power Supply Range Positive Supply Current, I+ V+ = 5.5V, VIN = 0V or V+, all channels on or off Full Full 2.7 -1 0.0001 12 1 V A TEMP (oC) 25 25 (NOTE 5) MIN TYP 21 28 (NOTE 5) MAX UNITS pF pF
PARAMETER COM ON Capacitance, CCOM(ON)
DIGITAL INPUT CHARACTERISTICS Input Voltage Low, VINL Input Voltage High, VINH Input Current, IINH, IINL NOTES: 4. VIN = input voltage to perform proper function. 5. The algebraic convention, whereby the most negative value is a minimum and the most positive a maximum, is used in this data sheet. 6. Leakage parameter is 100% tested at high temp, and guaranteed by correlation at 25oC. V+ = 5.5V, VIN = 0V or V+ Full Full Full 2.4 -1 0.8 1 V V A
Electrical Specifications - 3.3V Supply
Test Conditions: V+ = +3.0V to +3.6V, GND = 0V, VINH = 2.4V, VINL = 0.8V (Note 4), Unless Otherwise Specified TEST CONDITIONS TEMP (oC) (NOTE 5) MIN TYP (NOTE 5) MAX UNITS
PARAMETER ANALOG SWITCH CHARACTERISTICS Analog Signal Range, VANALOG ON Resistance, RON RON Matching Between Channels, RON RON Flatness, RFLAT(ON) NO or NC OFF Leakage Current, INO(OFF) or INC(OFF) COM OFF Leakage Current, ICOM(OFF) COM ON Leakage Current, ICOM(ON) DYNAMIC CHARACTERISTICS Turn-ON Time, tON Turn-OFF Time, tOFF Break-Before-Make Time Delay (ISL43122, ISL43210), tD Charge Injection, Q OFF Isolation Crosstalk (Channel-to-Channel) Power Supply Rejection Ratio
Full V+ = 3V, ICOM = 1.0mA, VNO or VNC = 1.5V V+ = 3.3V, ICOM = 1.0mA, VNO or VNC = 1.5V V+ = 3.3V, ICOM = 1.0mA, VNO or VNC = 0.5V, 1V, 1.5V V+ = 3.6V, VCOM = 1V, 3V, VNO or VNC = 3V, 1V (Note 6) V+ = 3.6V, VCOM = 3V, 1V, VNO or VNC = 1V, 3V (Note 6) V+ = 3.6V, VCOM = 1V, 3V, or VNO or VNC = 1V, 3V, or floating (Note 6) 25 Full 25 Full 25 Full 25 Full 25 Full 25 Full
0 -0.1 -5 -0.1 -5 -0.2 -10
32 40 0.8 1 6 7 0.01 0.01 -
V+ 50 60 2 4 8 12 0.1 5 0.1 5 0.2 10
V nA nA nA nA nA nA
VNO or VNC = 1.5V, RL =1k, CL = 35pF, VIN = 0 to 3V VNO or VNC = 1.5V, RL =1k, CL = 35pF, VIN = 0 to 3V RL = 300, CL = 35pF, VNO or VNC = 1.5V, VIN = 0 to 3V CL = 1.0nF, VG = 0V, RG = 0 RL = 50, CL = 5pF, f = 1MHz RL = 50, CL = 5pF, f = 1MHz
25 Full 25 Full Full 25 25 25 25 25
3 -
40 60 20 30 20 1 76 -105 56 8
120 200 50 120 5 -
ns ns ns ns ns pC dB dB dB pF
NO or NC OFF Capacitance, COFF f = 1MHz, VNO or VNC = VCOM = 0V
4
ISL43120, ISL43121, ISL43122, ISL43210
Electrical Specifications - 3.3V Supply
Test Conditions: V+ = +3.0V to +3.6V, GND = 0V, VINH = 2.4V, VINL = 0.8V (Note 4), Unless Otherwise Specified (Continued) TEST CONDITIONS f = 1MHz, VNO or VNC = VCOM = 0V f = 1MHz, VNO or VNC = VCOM = 0V, ISL43120, ISL43121, ISL43122 f = 1MHz, VNO or VNC = VCOM = 0V, ISL43210 POWER SUPPLY CHARACTERISTICS Positive Supply Current, I+ V+ = 3.6V, VIN = 0V or V+, all channels on or off Full -1 1 A TEMP (oC) 25 25 25 (NOTE 5) MIN TYP 8 21 28 (NOTE 5) MAX UNITS pF pF pF
PARAMETER COM OFF Capacitance, CCOM(OFF) COM ON Capacitance, CCOM(ON)
DIGITAL INPUT CHARACTERISTICS Input Voltage Low, VINL Input Voltage High, VINH Input Current, IINH, IINL V+ = 3.6V, VIN = 0V or V+ Full Full Full 2.4 -1 0.8 1 V V A
Electrical Specifications - 12V Supply
Test Conditions: V+ = +10.8V to +13V, GND = 0V, VINH = 4V, VINL = 0.8V (Note 4), Unless Otherwise Specified TEST CONDITIONS TEMP (oC) (NOTE 5) MIN TYP (NOTE 5) MAX UNITS
PARAMETER ANALOG SWITCH CHARACTERISTICS Analog Signal Range, VANALOG ON Resistance, RON RON Matching Between Channels, RON RON Flatness, RFLAT(ON) NO or NC OFF Leakage Current, INO(OFF) or INC(OFF) COM OFF Leakage Current, ICOM(OFF) COM ON Leakage Current, ICOM(ON) DYNAMIC CHARACTERISTICS Turn-ON Time, tON Turn-OFF Time, tOFF Break-Before-Make Time Delay (ISL43122, ISL43210), tD Charge Injection, Q OFF Isolation Crosstalk (Channel-to-Channel) Power Supply Rejection Ratio
Full V+ = 10.8V, ICOM = 1.0mA, VNO or VNC = 10V V+ = 12V, ICOM = 1.0mA, VNO or VNC = 10V V+ = 12V, ICOM = 1.0mA, VNO or VNC = 3V, 6V, 9V V+ = 13V, VCOM = 1V, 12V, VNO or VNC = 12V, 1V (Note 6) V+ = 13V, VCOM = 12V, 1V, VNO or VNC = 1V, 12V (Note 6) V+ = 13V, VCOM = 1V, 12V, or VNO or VNC = 1V, 12V, or floating (Note 6) 25 Full 25 Full 25 Full 25 Full 25 Full 25 Full
0 -0.1 -5 -0.1 -5 -0.2 -10
11 15 0.8 1 1 0.01 0.01 -
V+ 20 25 2 4 4 6 0.1 5 0.1 5 0.2 10
V nA nA nA nA nA nA
VNO or VNC = 10V, RL =1k, CL = 35pF, VIN = 0 to 4V VNO or VNC = 10V, RL =1k, CL = 35pF, VIN = 0 to 4V RL = 300, CL = 35pF, VNO or VNC = 10V, VIN = 0 to 4V CL = 1.0nF, VG = 0V, RG = 0 RL = 50, CL = 5pF, f = 1MHz RL = 50, CL = 5pF, f = 1MHz f = 1MHz, VNO or VNC = VCOM = 0V f = 1MHz, VNO or VNC = VCOM = 0V, ISL43120, ISL43121, ISL43122 f = 1MHz, VNO or VNC = VCOM = 0V, ISL43210
25 Full 25 Full Full 25 25 25 25 25 25 25 25
0 -
25 35 17 26 2 5 76 -105 63 8 8 21 28
35 55 30 50
ns ns ns ns ns
15 -
pC dB dB dB pF pF pF pF
NO or NC OFF Capacitance, COFF f = 1MHz, VNO or VNC = VCOM = 0V COM OFF Capacitance, CCOM(OFF) COM ON Capacitance, CCOM(ON)
5
ISL43120, ISL43121, ISL43122, ISL43210
Electrical Specifications - 12V Supply
Test Conditions: V+ = +10.8V to +13V, GND = 0V, VINH = 4V, VINL = 0.8V (Note 4), Unless Otherwise Specified (Continued) TEST CONDITIONS TEMP (oC) (NOTE 5) MIN TYP (NOTE 5) MAX UNITS A
PARAMETER POWER SUPPLY CHARACTERISTICS Positive Supply Current, I+
V+ = 13V, VIN = 0V or V+, all channels on or off
Full
-1
-
1
DIGITAL INPUT CHARACTERISTICS Input Voltage Low, VINL Input Voltage High, VINH Input Current, IINH, IINL V+ = 13V, VIN = 0V or V+ Full Full Full 4 -1 3 0.8 1 V V A
Test Circuits and Waveforms
3V OR 4V LOGIC INPUT 50% 0V tOFF SWITCH INPUT VNO 90% SWITCH OUTPUT 0V tON SWITCH INPUT VOUT 90% LOGIC INPUT NO or NC COM IN GND RL 1k CL 35pF VOUT tr < 20ns tf < 20ns V+ C
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 + R L ( ON ) FIGURE 1B. TEST CIRCUIT
FIGURE 1A. MEASUREMENT POINTS FIGURE 1. SWITCHING TIMES
V+
C
SWITCH OUTPUT VOUT
VOUT
RG
NO or NC
COM
VOUT
V+ LOGIC INPUT ON OFF 0V Q = VOUT x CL LOGIC INPUT ON VG GND IN CL
FIGURE 2A. MEASUREMENT POINTS FIGURE 2. CHARGE INJECTION
FIGURE 2B. TEST CIRCUIT
6
ISL43120, ISL43121, ISL43122, ISL43210 Test Circuits and Waveforms (Continued)
V+ 3V OR 4V LOGIC INPUT 0V VNX SWITCH OUTPUT VOUT1 90% 0V IN1 RL2 300 CL2 35pF C
NO1
VOUT1 COM1 VOUT2 RL1 300 CL1 35pF
NC2
COM2
IN2 SWITCH OUTPUT VOUT2 90% 0V LOGIC INPUT GND
tD
tD
CL includes fixture and stray capacitance. FIGURE 3A. MEASUREMENT POINTS (ISL43122 ONLY) FIGURE 3B. TEST CIRCUIT (ISL43122 ONLY)
V+ 3V OR 4V LOGIC INPUT 0V VNX SWITCH OUTPUT VOUT 90% IN 0V tD LOGIC INPUT GND
NO
C
COM
NC
VOUT RL 300 CL 35pF
FIGURE 3C. MEASUREMENT POINTS (ISL43210 ONLY) CL includes fixture and stray capacitance. FIGURE 3D. TEST CIRCUIT (ISL43210 ONLY) FIGURE 3. BREAK-BEFORE-MAKE TIME
V+ C SIGNAL GENERATOR RON = V1/1mA
NO or NC NO or NC
V+ C
VNX INX 0V or VINH 1mA V1 IN 0.8V or VINH
ANALYZER RL
COM
COM
GND
GND
FIGURE 4. OFF ISOLATION TEST CIRCUIT
FIGURE 5. RON TEST CIRCUIT
7
ISL43120, ISL43121, ISL43122, ISL43210 Test Circuits and Waveforms (Continued)
V+ C V+ C SIGNAL GENERATOR
NO1 or NC1 COM1
50
NO or NC
IN1 0V or 2.4V IN2 0V or VINH INX IMPEDANCE ANALYZER
COM
0V or VINH
ANALYZER RL
COM2
NO2 or NC2
GND
NC
GND
FIGURE 6. CROSSTALK TEST CIRCUIT
FIGURE 7. CAPACITANCE TEST CIRCUIT
Detailed Description
The ISL43120-ISL43122 and ISL43210 bidirectional, dual analog switches offer precise switching capability from a single 2.7V to 12V supply with low on-resistance (19) 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 (5W), 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.
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
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 1k 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 8
GND OPTIONAL PROTECTION DIODE
FIGURE 8. OVERVOLTAGE PROTECTION
Power-Supply Considerations
The ISL43XXX 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 ISL43XXX 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 specification tables and Typical Performance curves for details.
ISL43120, ISL43121, ISL43122, ISL43210
V+ and GND also power the internal logic and level shiftier. The level shiftier 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. 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 50 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.
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.
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 analogsignal-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.
High-Frequency Performance
In 50 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
Typical Performance Curves TA = 25oC, Unless Otherwise Specified
40 35 30 85oC RON () 25 RON () 20 15 10 5 3 4 5 6 7 8 V+ (V) 9 10 11 12 13 25oC -40oC 45 40 35 30 25 20 15 30 25 20 15 10 20 15 10 5 0 -40oC 2 4 6 VCOM (V) 8 10 12 85oC 85oC 25oC -40oC V+ = 5V 85oC 25oC -40oC 25oC V+ = 12V V+ = 3.3V
FIGURE 9. ON RESISTANCE vs SUPPLY VOLTAGE
FIGURE 10. ON RESISTANCE vs SWITCH VOLTAGE
9
ISL43120, ISL43121, ISL43122, ISL43210 Typical Performance Curves TA = 25oC, Unless Otherwise Specified (Continued)
0.5 0.4 0.3 0.2 0.1 0 0.25 0.2 0.15 0.1 0.05 0 0.15 0.1 0.05 0 0 2 4 6 VCOM (V) 8 10 12 85oC -40oC V+ = 5V Q (pC) 25oC 85oC -40oC 0 25oC -40oC 85oC -40oC V+ = 12V -10 25oC -20 0 2 4 6 VCOM (V) 8 10 12 85oC 20 10 V+ = 3.3V V+ = 5V V+ = 12V 40 30 V+ = 3.3V 25oC 60 50
RON ()
FIGURE 11. RON MATCH vs SWITCH VOLTAGE
100 90 80
FIGURE 12. CHARGE INJECTION vs SWITCH VOLTAGE
35
30 85oC tOFF (ns)
70 tON (ns) 60 85oC 50
25 -40oC
-40oC 40 30 25oC 20 2 3 4 5 6 7 V+ (V) 8 9 10 11 12 15 2 3 4 5 6 7 V+ (V) 8 9 -40oC 20
25oC
10
11
12
FIGURE 13. TURN - ON TIME vs SUPPLY VOLTAGE
FIGURE 14. TURN - OFF TIME vs SUPPLY VOLTAGE
NORMALIZED GAIN (dB)
3.0
V+ = 3.3V to 12V 0 -3 -6 PHASE 0 20 40 PHASE (DEGREES) GAIN
2.5 VINH VINH AND VINL (V) 2.0 -40oC 85oC
1.5
25oC -40oC 25oC VINL 85oC
85oC
60 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) 1 10 100 FREQUENCY (MHz) 80 100 600
1.0
0.5 2 3 4 5 6 7 8 V+ (V) 9 10 11 12 13
FIGURE 15. DIGITAL SWITCHING POINT vs SUPPLY VOLTAGE
FIGURE 16. FREQUENCY RESPONSE
10
ISL43120, ISL43121, ISL43122, ISL43210 Typical Performance Curves TA = 25oC, Unless Otherwise Specified (Continued)
-10 V+ = 3V to 13V -20 -30 -40 CROSSTALK (dB) -50 -60 -70 -80 -90 CROSSTALK -100 -110 1K 100 110 100M 500M 80 0.3 1 10 FREQUENCY (MHz) 100 1000 ISOLATION 20 30 OFF ISOLATION (dB) 40 50 60 70 80 90 0 10 V+ = 3.3V, SWITCH OFF 20 PSRR (dB) 30 40 50 60 70 V+ = 3.3V, SWITCH ON V+ = 12V, SWITCH ON V+ = 12V, SWITCH OFF 10 RL = 50
10K
100K
1M
10M
FREQUENCY (Hz)
FIGURE 17. CROSSTALK AND OFF ISOLATION
FIGURE 18. PSRR vs FREQUENCY
Die Characteristics
SUBSTRATE POTENTIAL (POWERED UP): GND TRANSISTOR COUNT: ISL43120: 66 ISL43121: 66 ISL43122: 66 ISL43210: 58 PROCESS: Si Gate CMOS
11
ISL43120, ISL43121, ISL43122, ISL43210 Small Outline Transistor Plastic Packages (SOT23-6)
0.20 (0.008) M C L b e L 6 C L 1 2 3 5 4 E C L E1 C
P6.064
6 LEAD SMALL OUTLINE TRANSISTOR PLASTIC PACKAGE INCHES SYMBOL A A1 A2 b C MIN 0.036 0.000 0.036 0.012 0.0036 0.111 0.103 0.060 MAX 0.057 0.0059 0.051 0.020 0.0078 0.118 0.118 0.068 MILLIMETERS MIN 0.90 0.00 0.90 0.30 0.09 2.80 2.60 1.50 MAX 1.45 0.15 1.30 0.50 0.20 3.00 3.00 1.75 NOTES 3 3 4, 5 6 10o Rev. 2 5/01
e1 D C L
C
D E E1 e e1
0.0374 Ref 0.0748 Ref 0.014 6 0o 10o 0o 0.022
0.95 Ref 1.90 Ref 0.35 6 0.55
A
A2
A1
SEATING PLANE -C-
L N
0.10 (0.004) C
NOTES: 1. Dimensioning and tolerances per ANSI 14.5M-1982. 2. Package conforms to EIAJ SC-74 (1992). 3. Dimensions D and E1 are exclusive of mold flash, protrusions, or gate burrs. 4. Footlength L measured at reference to seating plane. 5. "L" is the length of flat foot surface for soldering to substrate. 6. "N" is the number of terminal positions. 7. Controlling dimension: MILLIMETER. Converted inch dimensions are for reference only
12
ISL43120, ISL43121, ISL43122, ISL43210 Small Outline Transistor Plastic Packages (SOT23-8)
0.20 (0.008) M C L b C
P8.064
8 LEAD SMALL OUTLINE TRANSISTOR PLASTIC PACKAGE INCHES
L
e SYMBOL A
MILLIMETERS MIN 0.90 0.00 0.90 0.28 0.09 2.80 2.60 1.50 MAX 1.45 0.15 1.30 0.45 0.20 3.00 3.00 1.75 NOTES 3 3 4, 5 6 10o Rev. 1 10/01
MIN 0.036 0.000 0.036 0.011 0.0036 0.111 0.103 0.060
MAX 0.057 0.0059 0.051 0.018 0.0078 0.118 0.118 0.068
8 C L 1
7
6
5 E C L E1
A1 A2 b
2
3
4
C D e1
D C L
C
E E1 e e1
0.0256 Ref 0.0768 Ref 0.012 8 0o 10o 0o 0.020
0.65 Ref 1.95 Ref 0.30 8 0.50
A
A2
A1
SEATING PLANE -C-
L N
0.10 (0.004) C
NOTES: 1. Dimensioning and tolerances per ANSI 14.5M-1982. 2. Package patterned after EIAJ SC-74 (1992). 3. Dimensions D and E1 are exclusive of mold flash, protrusions, or gate burrs. 4. Footlength L measured at reference to seating plane. 5. "L" is the length of flat foot surface for soldering to substrate. 6. "N" is the number of terminal positions. 7. Controlling dimension: MILLIMETER. Converted inch dimensions are for reference only.
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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 parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
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