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ISL43840
Data Sheet September 2003 FN6056
Low-Voltage, Single and Dual Supply, Dual 4 to 1 Multiplexer Analog Switch with Enable
The Intersil ISL43840 device is a precision, bidirectional, analog switches configured as a a dual 4 channel multiplexer/ demultiplexer designed to operate from a single +2V to +12V supply or from a 2V to 6V supply. The device has two enable bar pins to simultaneously open all signal paths of bank A and B. ON resistance of 39 with a 5V supply and 125 with a +3.3V supply. Each switch can handle rail to rail analog signals. The off-leakage current is only .01nA at +25oC or 2.5nA at +85oC. All digital inputs have 0.8V to 2.4V logic thresholds, ensuring TTL/CMOS logic compatibility when using a single 3.3V or +5V supply or dual 5V supplies. The ISL43840 is a dual 4 to 1 multiplexer device. Table 1 summarizes the performance of this part.
TABLE 1. FEATURES AT A GLANCE CONFIGURATION 5V RON 5V tON / tOFF 12V RON 12V tON / tOFF 5V RON 5V tON / tOFF 3.3V RON 3.3V tON / tOFF Package 39 32ns/18ns 32 23ns/15ns 65 38ns/19ns 125 70ns/32ns 20 Ld 4x4 QFN DUAL 4:1 MUX
Features
* Fully Specified at 3.3V, 5V, 5V, and 12V Supplies for 10% Tolerances * ON Resistance (RON) Max, VS = 4.5V. . . . . . . . . . . 50 * ON Resistance (RON) Max, VS = +3V . . . . . . . . . . . 155 * RON Matching Between Channels, VS = 5V . . . . . . . . <2 * Low Charge Injection, VS = 5V . . . . . . . . . . . . . 1pC (Max) * Single Supply Operation. . . . . . . . . . . . . . . . . . . +2V to +12V * Dual Supply Operation . . . . . . . . . . . . . . . . . . . . . 2V to 6V * Fast Switching Action (VS = +5V) - tON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38ns - tOFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19ns * Guaranteed Max Off-leakage . . . . . . . . . . . . . . . . . . . . 2.5nA * Guaranteed Break-Before-Make * TTL, CMOS Compatible
Applications
* Communications Systems - Radios - Telecom Infrastructure - ADSL, VDSL Modems * Test Equipment - Medical Ultrasound - Magnetic Resonance Image - CT and PET Scanners (MRI) - ATE - Electrocardiograph * Audio and Video Signal Routing * Various Circuits - +3V/+5V DACs and ADCs - Sample and Hold Circuits - Operational Amplifier Gain Switching Networks - High Frequency Analog Switching - High Speed Multiplexing - Integrator Reset Circuits
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" * Application Note AN520 "CMOS Analog Multiplexers and Switches; Specifications and Application Considerations." * Application Note AN1034 "Analog Switch and Multiplexer Applications"
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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
ISL43840 Pinout
ISL43840 (QFN) TOP VIEW
NO1B
NO0B
20 COMB NO3B NO2B ENABLE A ENABLE B 1 2 3 4 5 6 -V
19
18
17
16 15 NO2A 14 COMA 13 NO0A 12 NO3A
LOGIC 7 GND 8 ADD2B
LOGIC 9 ADD1B 10 ADD2A
NO1A 11 ADD1A
N.C.
Truth Table (Note)
ISL43840 ENABLE 1 0 0 0 0 ADD2 X 0 0 1 1 ADD1 X 0 1 0 1 SWITCH ON NONE NO0 NO1 NO2 NO3
+V
Ordering Information
PART NO. (BRAND) ISL43840IR (43840IR) TEMP. RANGE (oC) -40 to 85 PACKAGE 20 Ld QFN PKG. NO. L20.4x4
NOTE: Applies to either A or B switch. Logic "0" 0.8V. Logic "1" 2.4V, with V+ between 2.7V and 10V. X = Don't Care.
Pin Descriptions
PIN V+ VGND ENABLE COM NO NC ADD N.C. FUNCTION Positive Power Supply Input Negative Power Supply Input. Connect to GND for Single Supply Configurations. Ground Connection Digital Control Input. Connect to GND for Normal Operation. Connect to V+ to turn all switches off. Analog Switch Common Pin Analog Switch Normally Open Pin Analog Switch Normally Closed Pin Address Input Pin No Internal Connection
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ISL43840
Absolute Maximum Ratings
V+ to V- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to15V V+ to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to15V V- to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -15 to 0.3V Input Voltages EN, NO, ADD (Note 1) . . . . . . . . . . . . . . . . . -0.3 to ((V+) + 0.3V) Output Voltages COM (Note 1) . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to ((V+) + 0.3V) Continuous Current (Any Terminal) . . . . . . . . . . . . . . . . . . . . 30mA Peak Current NO, NC, or COM (Pulsed 1ms, 10% Duty Cycle, Max) . . . . . . . . . . . . . . . . 100mA
Thermal Information
Thermal Resistance (Typical, Note 2) JA (oC/W) 20 Ld 4x4 QFN Package . . . . . . . . . . . . . . . . . . . . . 45 Maximum Junction Temperature (Plastic Package) . . . . . . . 150oC Maximum Storage Temperature Range. . . . . . . . . . . . -65oC to 150oC Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300oC (Lead Tips Only)
Operating Conditions
Temperature Range ISL43840IR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -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: 1. Signals on NO, COM, ADD, or EN exceeding V+ or V- are clamped by internal diodes. Limit forward diode current to maximum current ratings. 2. 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: VSUPPLY = 4.5V to 5.5V, GND = 0V, VINH = 2.4V, VINL = 0.8V (Note 3), Unless Otherwise Specified TEST CONDITIONS TEMP (oC) (NOTE 4) MIN TYP (NOTE 4) MAX UNITS
PARAMETER ANALOG SWITCH CHARACTERISTICS Analog Signal Range, VANALOG ON Resistance, RON
Full VS = 4.5V, ICOM = 2mA, VNO = 3V, (See Figure 5) 25 Full
V-0.1 -2.5 -0.1 -2.5 -0.1 -2.5
44 1.3 7.5 0.002 0.002 0.002 -
V+ 50 80 4 6 9 12 0.1 2.5 0.1 2.5 0.1 2.5
V nA nA nA nA nA nA
RON Matching Between Channels, RON RON Flatness, RFLAT(ON)
VS = 4.5V, ICOM = 2mA, VNO = 3V, (Note 5)
25 Full
VS = 4.5V, ICOM = 2mA, VNO = 3V, 0V, (Note 6)
25 Full
NO or NC OFF Leakage Current, INO(OFF) or INC(OFF) COM OFF Leakage Current, ICOM(OFF) COM ON Leakage Current, ICOM(ON)
VS = 5.5V, VCOM = 4.5V, VNO = +4.5V, (Note 7)
25 Full
VS = 5.5V, VCOM = 4.5V, VNO = +4.5V, (Note 7)
25 Full
VS = 5.5V, VCOM = VNO = 4.5V, (Note 7)
25 Full
DIGITAL INPUT CHARACTERISTICS Input Voltage High, VENH, VADDH Input Voltage Low, VENL, VADDL Input Current, IENH, IENL, IADDH, IADDL DYNAMIC CHARACTERISTICS Enable Turn-ON Time, tON VS = 4.5V, VNO = 3V, RL = 300, CL = 35pF, VIN = 0 to 3, (See Figure 1) VS = 4.5V, VNO = 3V, RL = 300, CL = 35pF, VIN = 0 to 3, (See Figure 1) 25 Full 25 Full 35 22 50 60 35 40 ns ns ns ns VS = 5.5V, VENH, VADD = 0V or V+ Full Full Full 2.4 -0.5 0.03 0.8 0.5 V V A
Enable Turn-OFF Time, tOFF
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ISL43840
Electrical Specifications: 5V Supply
Test Conditions: VSUPPLY = 4.5V to 5.5V, GND = 0V, VINH = 2.4V, VINL = 0.8V (Note 3), Unless Otherwise Specified (Continued) TEST CONDITIONS VS = 4.5V, VNO = 3V, RL = 300, CL = 35pF, VIN = 0 to 3, (See Figure 1) VS = 5.5V, VNO = 3V, RL = 300, CL = 35pF, VIN = 0 to 3V, (See Figure 3) CL = 1.0nF, VG = 0V, RG = 0, (See Figure 2 f = 1MHz, VNO = VCOM = 0V, (See Figure 7) f = 1MHz, VNO = VCOM = 0V, (See Figure 7) f = 1MHz, VNO = VCOM = 0V, (See Figure 7) RL = 50, CL = 15pF, f = 100kHz, VNO = 1VRMS, (See Figures 4 and 6) TEMP (oC) 25 Full Full 25 25 25 25 25 25 25 (NOTE 4) MIN 2 TYP 43 7 0.3 3 12 18 92 110 -105 (NOTE 4) MAX UNITS 60 70 1 ns ns ns pC pF pF pF dB dB dB
PARAMETER Address Transition Time, tTRANS
Break-Before-Make Time, tBBM Charge Injection, Q NO/NC OFF Capacitance, COFF COM OFF Capacitance, COFF COM ON Capacitance, CCOM(ON) OFF Isolation Crosstalk, (Note 8) All Hostile Crosstalk, (Note 8)
POWER SUPPLY CHARACTERISTICS Power Supply Range Positive Supply Current, I+ VS = 5.5V, VENH, VADD = 0V or V+, Switch On or Off Full 25 Full Negative Supply Current, I25 Full NOTES: 3. VIN = logic voltage to configure the device in a given state. 4. The algebraic convention, whereby the most negative value is a minimum and the most positive a maximum, is used in this data sheet. 5. RON = RON (MAX) - RON (MIN). 6. Flatness is defined as the difference between maximum and minimum value of on-resistance over the specified analog signal range. 7. Leakage parameter is 100% tested at high temp, and guaranteed by correlation at 25oC. 8. Between any two switches. 2 -1 -1 -1 -1 0.1 0.1 6 1 1 1 1 V A A A A
Electrical Specifications +12V Supply
Test Conditions: V+ = +10.8V to +13.2V, GND = 0V, VINH = 4V, VINL = 0.8V (Note 3), Unless Otherwise Specified TEST CONDITIONS TEMP (oC) (NOTE 4) MIN TYP (NOTE 4) MAX UNITS
PARAMETER ANALOG SWITCH CHARACTERISTICS Analog Signal Range, VANALOG ON Resistance, RON
Full V+ = 10.8V, ICOM = 1.0mA, VNO = 9V, (See Figure 5) 25 Full
0 -0.1 -2.5
37
V+ 45 55
V nA nA
RON Matching Between Channels, RON RON Flatness, RFLAT(ON)
V+ = 10.8V, ICOM = 1.0mA, VNO = 9V, (Note 5)
25 Full
1.2 5 0.002 -
2 2 7 7 0.1 2.5
V+ = 10.8V, ICOM = 1.0mA, VNO = 3V, 6V, 9V, (Note 6)
25 Full
NO or NC OFF Leakage Current, INO(OFF) or INC(OFF)
V+ = 13.2V, VCOM = 1V, 12V, VNO = 12V, 1V, (Note 7)
25 Full
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ISL43840
Electrical Specifications +12V Supply
Test Conditions: V+ = +10.8V to +13.2V, GND = 0V, VINH = 4V, VINL = 0.8V (Note 3), Unless Otherwise Specified (Continued) TEST CONDITIONS V+ = 13.2V, VCOM = 12V, 1V, VNO = 1V, 12V, (Note 7) V+ = 13.2V, VCOM = 1V, 12V, VNO = 1V, 12V, or floating, (Note 7) TEMP (oC) 25 Full 25 Full (NOTE 4) MIN -0.1 -2.5 -0.1 -2.5 TYP 0.002 0.002 (NOTE 4) MAX UNITS 0.1 2.5 0.1 2.5 nA nA nA nA
PARAMETER COM OFF Leakage Current, ICOM(OFF) COM ON Leakage Current, ICOM(ON)
DIGITAL INPUT CHARACTERISTICS Input Voltage High, VENH, VADDH Input Voltage Low, VENL, VADDL Input Current, IENH, IENL, IADDH, IADDL DYNAMIC CHARACTERISTICS Enable Turn-ON Time, tON V+ = 10.8V, VNO = 10V, RL = 300, CL = 35pF, VIN = 0 to 4, (See Figure 1) V+ = 10.8V, VNO = 10V, RL = 300, CL = 35pF, VIN = 0 to 4, (See Figure 1) V+ = 10.8V, VNO = 10V, RL = 300, CL = 35pF, VIN = 0 to 4, (See Figure 1) V+ = 13.2V, RL = 300, CL = 35pF, VNO = 10V, VIN = 0 to 4, (See Figure 3) CL = 1.0nF, VG = 0V, RG = 0, (See Figure 2) RL = 50, CL = 15pF, f = 100kHz, VNO = 1VRMS, (See Figures 4 and 6) 25 Full 25 Full 25 Full Full 25 25 25 25 25 25 25 2 5 2.7 92 110 -105 3 12 18 5 27 15 24 40 45 30 35 50 55 ns ns ns ns ns ns ns pC dB dB dB pF pF pF V+ = 13.2V, VENH, VADD = 0V or V+ Full Full Full 3.7 -0.5 3.3 2.7 0.03 0.8 0.5 V V A
Enable Turn-OFF Time, tOFF
Address Transition Time, tTRANS
Break-Before-Make Time Delay, tD Charge Injection, Q OFF Isolation Crosstalk, (Note 8) All Hostile Crosstalk, (Note 8)
NO or NC OFF Capacitance, COFF f = 1MHz, VNO = VCOM = 0V, (See Figure 7) COM OFF Capacitance, CCOM(OFF) COM ON Capacitance, CCOM(ON) f = 1MHz, VNO = VCOM = 0V, (See Figure 7) f = 1MHz, VNO = VCOM = 0V, (See Figure 7)
POWER SUPPLY CHARACTERISTICS Power Supply Range Positive Supply Current, I+ Positive Supply Current, IV+ = 13.2V, VENH, VADD = 0V or V+, all channels On or Off Full Full Full 2 -1 -1 12 1 1 V A A
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ISL43840
Electrical Specifications: 5V Supply
Test Conditions: V+ = +4.5V to +5.5V, V- = GND = 0V, VINH = 2.4V, VINL = 0.8V (Note 3), Unless Otherwise Specified TEST CONDITIONS TEMP (oC) MIN (NOTE 4) TYP MAX (NOTE 4) UNITS
PARAMETER ANALOG SWITCH CHARACTERISTICS Analog Signal Range, VANALOG ON Resistance, RON
Full V+ = 4.5V, ICOM = 1.0mA, VNO = 3.5V, (See Figure 5) V+ = 4.5V, ICOM = 1.0mA, VNO = 3V, (Note 5) 25 Full 25 Full V+ = 4.5V, ICOM = 1.0mA, VNO = 1V, 2V, 3V, (Note 6) 25 Full
0 -0.1 -2.5 -0.1 -2.5 -0.1 -2.5
81 2.2 11.5 0.002 0.002 0.002 -
V+ 90 120 4 6 17 24 0.1 2.5 0.1 2.5 0.1 2.5
V nA nA nA nA nA nA
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)
V+ = 5.5V, VCOM = 1V, 4.5V, VNO = 4.5V, 1V, (Note 7)
25 Full
V+ = 5.5V, VCOM = 1V, 4.5V, VNO = 4.5V, 1V, (Note 7)
25 Full
V+ = 5.5V, VCOM = VNO = 4.5V, (Note 7)
25 Full
DIGITAL INPUT CHARACTERISTICS Input Voltage High, VENH, VADDH Input Voltage Low, VENL, VADDL Input Current, IENH, IENL, IADDH, IADDL DYNAMIC CHARACTERISTICS Enable Turn-ON Time, tON V+ = 4.5V, VNO = 3V, RL = 300, CL = 35pF, VIN = 0 to 3V, (See Figure 1) V+ = 4.5V, VNO = 3V, RL = 300, CL = 35pF, VIN = 0 to 3V, (See Figure 1) V+ = 4.5V, VNO = 3V, RL = 300, CL = 35pF, VIN = 0 to 3V, (See Figure 1) V+ = 5.5V, VNO = 3V, RL = 300, CL = 35pF, VIN = 0 to 3V, (See Figure 3) CL = 1.0nF, VG = 0V, RG = 0, (See Figure 2) RL = 50, CL = 15pF, f = 100kHz, VNO = 1VRMS, (See Figures 4 and 6) 25 Full 25 Full 25 Full Full 25 25 25 25 2 43 20 51 9 0.6 92 110 -105 60 70 35 40 70 85 1.5 ns ns ns ns ns ns ns pC dB dB dB V+ = 5.5V, VENH, VADD = 0V or V+ Full Full Full 2.4 -0.5 0.03 0.8 0.5 V V A
Enable Turn-OFF Time, tOFF
Address Transition Time, tTRANS
Break-Before-Make Time, tBBM Charge Injection, Q OFF Isolation Crosstalk, (Note 8) All Hostile Crosstalk, (Note 8)
POWER SUPPLY CHARACTERISTICS Power Supply Range Positive Supply Current, I+ V+ = 5.5V, V- = 0V, VENH, VADD = 0V or V+, Switch On or Off Full 25 Full 25 Full 2 -1 -1 -1 -1 -0.1 -0.1 12 1 1 1 1 V A A A A
Positive Supply Current, I-
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ISL43840
Electrical Specifications: 3.3V Supply
Test Conditions: V+ = +3.0V to +3.6V, V- = GND = 0V, VINH = 2.4V, VINL = 0.8V (Note 3), Unless Otherwise Specified TEST CONDITIONS TEMP (oC) MIN (NOTE 4) TYP MAX (NOTE 4) UNITS
PARAMETER ANALOG SWITCH CHARACTERISTICS Analog Signal Range, VANALOG ON Resistance, RON
Full V+ = 3.0V, ICOM = 1.0mA, VNO = 1.5V, (See Figure 5) V+ = 3.0V, ICOM = 1.0mA, VNO = 1.5V, (Note 5) 25 Full 25 Full V+ = 3.0V, ICOM = 1.0mA, VNO = 0.5V, 1V, 2V, (Note 6) 25 Full
0 -0.1 -2.5 -0.1 -2.5 -0.1 -2.5
135 3.4 34 0.002 0.002 0.002 -
V+ 155 200 8 10 40 50 0.1 2.5 0.1 2.5 0.1 2.5
V nA nA nA nA nA nA
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)
V+ = 3.6V, VCOM = 0V, 4.5V, VNO = 3V, 1V, (Note 7) V+ = 3.6V, VCOM = 0V, 4.5V, VNO = 3V, 1V, (Note 7) V+ = 3.6V, VCOM = VNO = 3V, (Note 7)
25 Full 25 Full 25 Full
DIGITAL INPUT CHARACTERISTICS Input Voltage High, VENH, VADDH Input Voltage Low, VENL, VADDL Input Current, IENH, IENL, IADDH, IADDL DYNAMIC CHARACTERISTICS Enable Turn-ON Time, tON V+ = 3.0V, VNO = 1.5V, RL = 300, CL = 35pF, VIN = 0 to 3V, (See Figure 1) V+ = 3.0V, VNO = 1.5V, RL = 300, CL = 35pF, VIN = 0 to 3V, (See Figure 1) V+ = 3.0V, VNO = 1.5V, RL = 300, CL = 35pF, VIN = 0 to 3V, (See Figure 1) V+ = 3.6V, VNO = 1.5V, RL = 300, CL = 35pF, VIN = 0 to 3V, (See Figure 3) CL = 1.0nF, VG = 0V, RG = 0, (See Figure 2) RL = 50, CL = 15pF, f = 100kHz, VNO = 1VRMS, (See Figures 4 and 6) 25 Full 25 Full 25 Full Full 25 25 25 25 3 82 37 96 13 0.3 92 110 -105 100 120 50 60 120 145 1 ns ns ns ns ns ns ns pC dB dB dB V+ = 3.6V, VENH, VADD = 0V or V+ Full Full Full 2.4 -0.5 0.03 0.8 0.5 V V A
Enable Turn-OFF Time, tOFF
Address Transition Time, tTRANS
Break-Before-Make Time, tBBM Charge Injection, Q OFF Isolation Crosstalk, (Note 8) All Hostile Crosstalk, (Note 8)
POWER SUPPLY CHARACTERISTICS Power Supply Range Positive Supply Current, I+ V+ = 3.6V, V- = 0V, VENH, VADD = 0V or V+, Switch On or Off Full 25 Full 25 Full 2 -1 -1 -1 -1 -0.1 -0.1 12 1 1 1 1 V A A A A
Positive Supply Current, I-
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ISL43840 Test Circuits and Waveforms
3V LOGIC INPUT 0V tON V+ NO0 NO1-NO3 VNO0 SWITCH OUTPUT 90% VOUT 90% LOGIC INPUT ENABLE COM VOUT 50% tr < 20ns tf < 20ns V+ C C VC
GND ADD1, 2
0V tOFF
RL 300
CL 35pF
Logic input waveform is inverted for switches that have the opposite logic sense.
Repeat test for other switches. CL includes fixture and stray capacitance. RL V OUT = V -----------------------------(NO) R + R
L ( ON )
FIGURE 1A. ENABLE tON / tOFF MEASUREMENT POINTS
FIGURE 1B. ENABLE tON / tOFF TEST CIRCUIT
3V LOGIC INPUT 50% 0V tTRANS
tr < 20ns tf < 20ns
V+ C
C
V-
C
V+ VC
NO0 NO3 NO1-NO2 ADD1, 2 GND ENABLE CL 35pF COM VOUT
VNO0 SWITCH OUTPUT
VOUT
90% LOGIC INPUT
0V 10% VNOX tTRANS
RL 300
Logic input waveform is inverted for switches that have the opposite logic sense. FIGURE 1C. ADDRESS tTRANS MEASUREMENT POINTS
Repeat test for other switches. CL includes fixture and stray capacitance. RL -----------------------------V OUT = V (NO) R + R
L ( ON )
FIGURE 1D. ADDRESS tTRANS TEST CIRCUIT
FIGURE 1. SWITCHING TIMES
V+
C
V-
C
3V LOGIC INPUT OFF ON 0V 0 ADDX SWITCH OUTPUT VOUT Q = VOUT x CL VOUT VG GND ENABLE LOGIC INPUT OFF RG NOX COMX
VOUT
CL 1nF
Repeat test for other switches. FIGURE 2B. Q TEST CIRCUIT FIGURE 2. CHARGE INJECTION
FIGURE 2A. Q MEASUREMENT POINTS
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ISL43840 Test Circuits and Waveforms (Continued)
3V LOGIC INPUT 0V COM V+ SWITCH OUTPUT VOUT 0V tBBM LOGIC INPUT GND ENABLE 80% ADD1. 2 NO0-NO3 RL 300 CL 35pF tr < 20ns tf < 20ns C VOUT V+ C VC
FIGURE 3A. tBBM MEASUREMENT POINTS
Repeat test for other switches. CL includes fixture and stray capacitance. FIGURE 3B. tBBM TEST CIRCUIT
FIGURE 3. BREAK-BEFORE-MAKE TIME
V+
C
V-
C
V+
C
V-
C
SIGNAL GENERATOR NOX
RON = V1/1mA NOX VNX 0V or V+ ADDX 0V or V+ COMX GND ENABLE 1mA V1 0V or V+ ADDX
ANALYZER RL
COMX
ENABLE GND
FIGURE 4. OFF ISOLATION TEST CIRCUIT
FIGURE 5. RON TEST CIRCUIT
V+
C
V-
C V+ C VC
SIGNAL GENERATOR
50 NOA COMA NOX ADDX 0V or V+ NOB IMPEDANCE ANALYZER N.C. COMX GND ENABLE ADDX 0V or V+
ANALYZER RL
COMB
GND ENABLE
FIGURE 6. CROSSTALK TEST CIRCUIT
FIGURE 7. CAPACITANCE TEST CIRCUIT
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ISL43840 Detailed Description
The ISL43840 analog switch offers a precise switching capability from a bipolar 2V to 6V or a single 2V to 12V supply with low on-resistance (39) and high speed operation (tON = 38ns, tOFF = 19ns) with dual 5V supplies. It has an enable bar pin to simultaneously open all signal paths. The device is especially well suited for applications using
5V supplies. With 5V supplies the performance (RON,
Power-Supply Considerations
The ISL43840 construction is typical of most CMOS analog switches, in that they have three supply pins: V+, V-, and GND. V+ and V- drive the internal CMOS switches and set their analog voltage limits, so there are no connections between the analog signal path and GND. Unlike switches with a 13V maximum supply voltage, the ISL43840 15V maximum supply voltage provides plenty of room for the 10% tolerance of 12V supplies (6V or 12V single supply), as well as room for overshoot and noise spikes. This switch device performs equally well when operated with bipolar or single voltage supplies.The minimum recommended supply voltage is 2V or 2V. It is important to note that the input signal range, switching times, and onresistance degrade at lower supply voltages. Refer to the electrical specification tables and Typical Performance Curves for details. V+ and GND power the internal logic (thus setting the digital switching point) and level shifters. The level shifters convert the logic levels to switched V+ and V- signals to drive the analog switch gate terminals.
Leakage, Charge Injection, ect.) is best in class. 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 to V-(see Figure 8). To prevent forward biasing these diodes, V+ and V- must be applied before any input signals, and input signal voltages must remain between V+ and V-. 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. This method is not applicable for the signal path inputs. 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 V-. The low leakage current performance is unaffected by this approach, but the switch resistance may increase, especially at low supply voltages.
OPTIONAL PROTECTION RESISTOR FOR LOGIC INPUTS OPTIONAL PROTECTION DIODE V+
Logic-Level Thresholds
V+ and GND power the internal logic stages, so V- has no affect on logic thresholds. This switch family is TTL compatible (0.8V and 2.4V) over a V+ supply range of 2.7V to 10V. At 12V the VIH level is about 3.3V. This is still below the CMOS guaranteed high output minimum level of 4V, but noise margin is reduced. For best results with a 12V supply, use a logic family that provides a VOH greater than 4V. 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 50 systems, signal response is reasonably flat even past 100MHz (see Figures 17 and 18). Figures 17 and 18 also illustrates that the frequency response is very consistent over varying analog signal levels. An OFF switch acts like a capacitor and passes higher frequencies with less attenuation, resulting in signal feed through from a switch's input to its output. Off Isolation is the resistance to this feed through, while Crosstalk indicates the amount of feed through from one switch to another. Figure 19 details the high Off Isolation and Crosstalk rejection provided by this family. At 10MHz, Off Isolation is about 55dB 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.
1k
LOGIC VNO VCOM
VOPTIONAL PROTECTION DIODE
FIGURE 8. INPUT OVERVOLTAGE PROTECTION
10
ISL43840
Leakage Considerations
Reverse ESD protection diodes are internally connected between each analog-signal pin and both V+ and V-. One of these diodes conducts if any analog signal exceeds V+ or V-. Virtually all the analog leakage current comes from the ESD diodes to V+ or V-. 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 V- 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 V- pins constitutes the analog-signalpath 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 GND.
Typical Performance Curves TA = 25oC, Unless Otherwise Specified
70 60 50 40 30 RON () 20 400 V- = 0V 300 200 100 0 V- = -5V 120 110 100 90 80 70 60 50 90 80 70 60 50 40 30 60 50 40 -40oC 2 3 4 5 6 7 V+ (V) 8 9 10 11 12 30 20 -5 -4 -3 -2 -1 1 0 VCOM (V) 2 3 4 5 -40oC ICOM = 2mA 85oC 25oC -40oC VS = 3V VS = 2V
VCOM = (V+) - 1V ICOM = 1mA 85oC 25oC -40oC RON ()
85oC 25oC -40oC
85oC
25oC
25oC
85oC
VS = 5V
FIGURE 9. ON RESISTANCE vs SUPPLY VOLTAGE
FIGURE 10. ON RESISTANCE vs SWITCH VOLTAGE
225 200 175 150 125 100 75 160 140 120 100 80 60 100 90 80 70 60 50 40 0 85oC 25oC -40oC
ICOM = 1mA
60 55 50
V+ = 12V V- = 0V
ICOM = 1mA
V+ = 2.7V V- = 0V RON ()
45 85oC 40 35 30 25oC
RON ()
85oC 25oC -40oC 85oC 25oC -40oC 1 3 2 VCOM (V) 4 5 V+ = 5V V- = 0V V+ = 3.3V V- = 0V
25 -40oC 20 0 2 4 6 VCOM (V) 8 10 12
FIGURE 11. ON RESISTANCE vs SWITCH VOLTAGE
FIGURE 12. ON RESISTANCE vs SWITCH VOLTAGE
11
ISL43840 Typical Performance Curves TA = 25oC, Unless Otherwise Specified (Continued)
500 400 300 200 100 tON (ns) 0 250 200 150 100 50 0 2 3 4 5 6 7 V+ (V) 8 9 10 11 12 -40oC -40oC V- = 0V 85oC 25oC V- = -5V -40oC 25oC 25oC 85oC tOFF (ns) VCOM = (V+) - 1V 150 100 50 0 100 80 60 40 20 0 2 -40oC 3 4 5 6 7 V+ (V) 8 9 10 11 12 -40oC V- = 0V 85oC 25oC 200 -40oC 25oC 25oC 85oC V- = -5V VCOM = (V+) - 1V
FIGURE 13. ENABLE TURN - ON TIME vs SUPPLY VOLTAGE
300
FIGURE 14. ENABLE TURN - OFF TIME vs SUPPLY VOLTAGE
250 VCOM = (V+) - 1V 200
VCOM = (V+) - 1V V- = 0V
250
200 tRANS (ns) tRANS (ns) 150
150
100
100
25oC 85oC
25oC 85oC 50 -40oC 0 2 3 4 5 6 7 8 9 10 11 12 13 2 3 4
50 -40oC 0 V+ (V)
5
6
V (V)
FIGURE 15. ADDRESS TRANS TIME vs SINGLE SUPPLY VOLTAGE
FIGURE 16. ADDRESS TRANS TIME vs DUAL SUPPLY VOLTAGE
NORMALIZED GAIN (dB)
VS = 5V 3 GAIN 0 -3
NORMALIZED GAIN (dB)
VIN = 0.2VP-P to 5VP-P
VS = 3V 3 GAIN 0 -3
VIN = 0.2VP-P to 4VP-P
PHASE (DEGREES)
PHASE
PHASE
45 90 135 180 RL = 50 1 10 100 FREQUENCY (MHz) 600
45 90 135 180 RL = 50 1 10 100 FREQUENCY (MHz) 600
FIGURE 17. FREQUENCY RESPONSE
FIGURE 18. FREQUENCY RESPONSE
12
PHASE (DEGREES)
0
0
ISL43840 Typical Performance Curves TA = 25oC, Unless Otherwise Specified (Continued)
-10 V+ = 3V to 12V or -20 VS = 2V to 5V RL = 50 -30 -40 CROSSTALK (dB) -50 -60 ISOLATION -70 CROSSTALK -80 -90 -100 ALL HOSTILE CROSSTALK -110 1k 10k 100k 1M 10M 110 100M 500M 80 90 100 -4 -5 -2.5 0 2.5 VCOM (V) 5 7.5 10 12 70 10 20 30 1 OFF ISOLATION (dB) 40 50 60 3
2 V+ = 3.3V V- = 0V V+ = 12V V- = 0V V+ = 5V V- = 0V VS = 5V -2
0 Q (pC)
-1
-3
FREQUENCY (Hz)
FIGURE 19. CROSSTALK AND OFF ISOLATION
FIGURE 20. CHARGE INJECTION vs SWITCH VOLTAGE
Die Characteristics
SUBSTRATE POTENTIAL (POWERED UP): GND TRANSISTOR COUNT: 193 PROCESS: Si Gate CMOS
13
ISL43840 Quad Flat No-Lead Plastic Package (QFN) Micro Lead Frame Plastic Package (MLFP)
L20.4x4
20 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE (COMPLIANT TO JEDEC MO-220VGGD-1 ISSUE C) MILLIMETERS SYMBOL A A1 A2 A3 b D D1 D2 E E1 E2 e k L L1 N Nd Ne P 5 0.25 0.35 1.95 1.95 0.18 MIN 0.80 NOMINAL 0.90 0.20 REF 0.23 4.00 BSC 3.75 BSC 2.10 4.00 BSC 3.75 BSC 2.10 0.50 BSC 0.60 20 5 5 0.60 12 0.75 0.15 2.25 2.25 0.30 MAX 1.00 0.05 1.00 NOTES 9 9 5, 8 9 7, 8 9 7, 8 8 10 2 3 3 9 9 Rev. 1 10/02 NOTES: 1. Dimensioning and tolerancing conform to ASME Y14.5-1994. 2. N is the number of terminals. 3. Nd and Ne refer to the number of terminals on each D and E. 4. All dimensions are in millimeters. Angles are in degrees. 5. Dimension b applies to the metallized terminal and is measured between 0.15mm and 0.30mm from the terminal tip. 6. The configuration of the pin #1 identifier is optional, but must be located within the zone indicated. The pin #1 identifier may be either a mold or mark feature. 7. Dimensions D2 and E2 are for the exposed pads which provide improved electrical and thermal performance. 8. Nominal dimensions are provided to assist with PCB Land Pattern Design efforts, see Intersil Technical Brief TB389. 9. Features and dimensions A2, A3, D1, E1, P & are present when Anvil singulation method is used and not present for saw singulation. 10. Depending on the method of lead termination at the edge of the package, a maximum 0.15mm pull back (L1) maybe present. L minus L1 to be equal to or greater than 0.3mm.
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