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ISL43L420
Data Sheet February 18, 2005 FN6098.1
Ultra Low ON-Resistance, +1.1V to +4.5V Single Supply, Quad SPDT (Dual DPDT) Analog Switch
The Intersil ISL43L420 device is a low ON-resistance, low voltage, bidirectional, Quad SPDT (Dual DPDT) analog switch designed to operate from a single +1.1V to +4.5V supply. Targeted applications include battery-powered equipment that benefit from low RON (0.24) and fast switching speeds (tON = 8ns, tOFF = 5ns). The digital logic input is 1.8V logic-compatible when using a single +3V supply. 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 part may be used to "mux-in" additional functionality while reducing ASIC design risk. The ISL43L420 is offered in a small form factor package, alleviating board space limitations. The ISL43L420 is a committed Quad SPDT that consists of four normally open (NO) and four normally (NC) switches. This configuration can also be used as a diff dual 2-to-1 multiplexer/demultiplexer or a dual 2-to1 multiplexer/demultiplexer. The ISL43L420 is pin compatible with the STG3699.
TABLE 1. FEATURES AT A GLANCE ISL43L420 Number of Switches SW 4.3V RON 4.3V tON/tOFF 3.0V RON 3.0V tON/tOFF 1.8V RON 1.8V tON/tOFF Packages 4 Quad SPDT (Dual DPDT) 0.24 8ns/5ns 0.26 10ns/7ns 0.45 18ns/10ns 16 Ld 3x3 QFN
Features
* Drop in Replacement for the STG3699 * ON Resistance (RON) - V+ = +4.3V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.24 - V+ = +3.0V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.26 - V+ = +1.8V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.45 * RON Matching between Channels . . . . . . . . . . . . . . . . .0.05 * RON Flatness Across Signal Range . . . . . . . . . . . . . . .0.05 * Single Supply Operation. . . . . . . . . . . . . . . . . +1.1V to +4.5V * Low Power Consumption (PD). . . . . . . . . . . . . . . . . . <0.2W * Fast Switching Action (V+ = +4.3V) - tON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8ns - tOFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5ns * Guaranteed Break-Before-Make * 1.8V Logic Compatible (+3V supply) * Available in 16 lead 3x3 QFN * ESD HBM Rating - COM Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9kV - All Other Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4kV * Pb-Free Available as an Option (see Ordering Info)
Applications
* Battery Powered, Handheld, and Portable Equipment - Cellular/Mobile Phones - Pagers - Laptops, Notebooks, Palmtops * Portable Test and Measurement * Medical Equipment * Audio and Video Switching
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"
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 Intersil Americas Inc. 2004. All Rights Reserved All other trademarks mentioned are the property of their respective owners.
ISL43L420 Pinout
ISL43L420 (3x3 QFN) TOP VIEW
COM1 NO1 NC4 V+
Ordering Information
PART NO. (BRAND) ISL43L420IR (420IR) ISL43L420IR-T (420IR) ISL43L420IRZ (420IR) (See Note) ISL43L420IRZ-T (420IR) (See Note) TEMP. RANGE (C) -40 to 85 -40 to 85 -40 to 85 PACKAGE 16 Ld 3x3 QFN 16 Ld 3x3 QFN Tape and Reel 16 Ld 3x3 QFN (Pb-free) 16 Ld 3x3 QFN Tape and Reel (Pb-free) PKG. DWG. # L16.3x3 L16.3x3 L16.3x3
16 NC1 IN1-2 NO2 COM2 1 2 3 4 5 NC2
15
14
13 12 COM4 11 NO4
10 IN3-4 9 6 GND 7 NO3 8 COM3 NC3
-40 to 85
L16.3x3
Truth Table
LOGIC 0 1 NOTE: NC SW ON OFF NO SW OFF ON
NOTE: Intersil Pb-free products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which is 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-020C.
Logic "0" 0.5V. Logic "1" 1.4V with a 3V supply.
Pin Descriptions
PIN V+ GND IN COM NO NC FUNCTION System Power Supply Input (+1.1V to +4.5V) Ground Connection Digital Control Input Analog Switch Common Pin Analog Switch Normally Open Pin Analog Switch Normally Closed Pin
2
FN6098.1
ISL43L420
Absolute Maximum Ratings
V+ to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to 4.7V Input Voltages NO, NC, IN (Note 1) . . . . . . . . . . . . . . . . . . . . -0.3 to ((V+) + 0.3V) Output Voltages COM (Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to ((V+) + 0.3V) Continuous Current NO, NC, or COM . . . . . . . . . . . . . . . . . 300mA Peak Current NO, NC, or COM (Pulsed 1ms, 10% Duty Cycle, Max) . . . . . . . . . . . . . . . . 500mA ESD Rating: HBM COMX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .>9kV HBM NOX, NCX, INX, V+, GND . . . . . . . . . . . . . . . . . . . . . . .>4kV MM COMX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .>500V MM NOX, NCX, INX, V+, GND . . . . . . . . . . . . . . . . . . . . . . .>300V CDM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .>1000V
Thermal Information
Thermal Resistance (Typical, Note 2) JA (C/W) 16 Ld 3x3 QFN Package . . . . . . . . . . . . . . . . . . . . . 75 Maximum Junction Temperature (Plastic Package). . . . . . . . 150C Maximum Storage Temperature Range . . . . . . . . . . . . . -65C to 150C Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300C (Lead Tips Only)
Operating Conditions
Temperature Range ISL43L420IR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40C to 85C
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 NC, NO, IN, or COM exceeding V+ or GND are clamped by internal diodes. Limit forward diode current to maximum current ratings. 2. JA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
Electrical Specifications - 4.3V Supply
Test Conditions: V+ = +3.9V to +4.5V, GND = 0V, VINH = 1.6V, VINL = 0.5V (Notes 3, 5), Unless Otherwise Specified TEST CONDITIONS TEMP (C) (NOTE 4) MIN TYP (NOTE 4) MAX UNITS
PARAMETER ANALOG SWITCH CHARACTERISTICS Analog Signal Range, VANALOG ON Resistance, RON
Full V+ = 3.9V, ICOM = 100mA, VNO or VNC = 0V to V+, (See Figure 5) V+ = 3.9V, ICOM = 100mA, VNO or VNC = Voltage at max RON, (Note 8) V+ = 3.9V, ICOM = 100mA, VNO or VNC = 0V to V+, (Note 6) V+ = 4.5V, VCOM = 0.3V, 3V, VNO or VNC = 3V, 0.3V 25 Full 25 Full 25 Full 25 Full V+ = 4.5V, VCOM = 0.3V, 3V, or VNO or VNC = 0.3V, 3V, or Floating 25 Full
0 -50 -150 -50 -150
0.25 0.05 0.05 -
V+ 0.45 0.6 0.08 0.09 0.15 0.15 50 150 50 150
V 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 ON Leakage Current, ICOM(ON) DYNAMIC CHARACTERISTICS Turn-ON Time, tON
V+ = 3.9V, VNO or VNC = 1.5V, RL = 50, CL = 35pF, (See Figure 1, Note 7) V+ = 3.9V, VNO or VNC = 1.5V, RL = 50, CL = 35pF, (See Figure 1, Note 7) V+ = 4.5V, VNO or VNC = 1.5V, RL = 50, CL = 35pF, (See Figure 3, Note 7) CL = 1.0nF, VG = 0V, RG = 0, (See Figure 2) RL = 50, CL = 5pF, f = 100kHz, VCOM = 1VRMS, (See Figure 4) RL = 50, CL = 5pF, f = 100kHz, VCOM = 1VRMS, (See Figure 6) f = 20Hz to 20kHz, VCOM = 2VP-P, RL = 600
25 Full 25 Full Full 25 25 25 25
2 -
8 5 3 -120 68 -98 0.003
13 18 10 15 -
ns ns ns ns ns pC dB dB %
Turn-OFF Time, tOFF
Break-Before-Make Time Delay, tD Charge Injection, Q OFF Isolation Crosstalk (Channel-to-Channel) Total Harmonic Distortion
3
FN6098.1
ISL43L420
Electrical Specifications - 4.3V Supply
Test Conditions: V+ = +3.9V to +4.5V, GND = 0V, VINH = 1.6V, VINL = 0.5V (Notes 3, 5), Unless Otherwise Specified (Continued) TEST CONDITIONS TEMP (C) 25 25 (NOTE 4) MIN TYP 106 212 (NOTE 4) MAX UNITS pF pF
PARAMETER
NO or NC OFF Capacitance, COFF f = 1MHz, VNO or VNC = VCOM = 0V, (See Figure 7) COM ON Capacitance, CCOM(ON) f = 1MHz, VNO or VNC = VCOM = 0V, (See Figure 7)
POWER SUPPLY CHARACTERISTICS Power Supply Range Positive Supply Current, I+ V+ =1.1V to 4.5V, VIN = 0V or V+ Full 25 Full DIGITAL INPUT CHARACTERISTICS Input Voltage Low, VINL Input Voltage High, VINH Input Current, IINH, IINL NOTES: 3. VIN = input voltage to perform proper function. 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. Parts are 100% tested at +25C. Limits across the full temperature range are guaranteed by design and correlation. 6. Flatness is defined as the difference between maximum and minimum value of on-resistance over the specified analog signal range. 7. Guaranteed but not tested. 8. RON matching between channels is calculated by subtracting the channel with the highest max RON value from the channel with lowest max RON value, between NC1 and NC2, NC3 and NC4 or between NO1 and NO2, NO3 and NO4. V+ = 4.5V, VIN = 0V or V+, (Note 7) Full Full Full 1.6 -0.5 0.5 0.5 V V A 1.1 4.5 0.06 1.4 V A A
Electrical Specifications - 3V Supply
Test Conditions: V+ = +2.7V to +3.3V, GND = 0V, VINH = 1.4V, VINL = 0.5V (Notes 3, 5), Unless Otherwise Specified TEST CONDITIONS TEMP (C) (NOTE 4) MIN TYP (NOTE 4) MAX UNITS
PARAMETER ANALOG SWITCH CHARACTERISTICS Analog Signal Range, VANALOG ON Resistance, RON
Full V+ = 2.7V, ICOM = 100mA, VNO or VNC = 0V to V+, (See Figure 5) V+ = 2.7V, ICOM = 100mA, VNO or VNC = Voltage at max RON, (Note 8) V+ = 2.7V, ICOM = 100mA, VNO or VNC = 0V to V+, (Note 6) V+ = 3.3V, VCOM = 0.3V, 3V, VNO or VNC = 3V, 0.3V 25 Full 25 Full 25 Full 25 Full V+ = 3.3V, VCOM = 0.3V, 3V, or VNO or VNC = 0.3V, 3V, or Floating 25 Full
0 -
0.3 0.05 0.06 1.2 13 1 35
V+ 0.45 0.6 0.08 0.09 0.15 0.15 -
V 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 ON Leakage Current, ICOM(ON) DYNAMIC CHARACTERISTICS Turn-ON Time, tON
V+ = 2.7V, VNO or VNC = 1.5V, RL = 50, CL = 35pF, (See Figure 1, Note 7) V+ = 2.7V, VNO or VNC = 1.5V, RL = 50, CL = 35pF, (See Figure 1, Note 7) V+ = 3.3V, VNO or VNC = 1.5V, RL = 50, CL = 35pF, (See Figure 3, Note 7)
25 Full 25 Full Full
2
11 8 3
17 20 14 17 -
ns ns ns ns ns
Turn-OFF Time, tOFF
Break-Before-Make Time Delay, tD
4
FN6098.1
ISL43L420
Electrical Specifications - 3V Supply
Test Conditions: V+ = +2.7V to +3.3V, GND = 0V, VINH = 1.4V, VINL = 0.5V (Notes 3, 5), Unless Otherwise Specified (Continued) TEST CONDITIONS CL = 1.0nF, VG = 0V, RG = 0, (See Figure 2) RL = 50, CL = 5pF, f = 100kHz, VCOM = 1VRMS, (See Figure 4) RL = 50, CL = 5pF, f = 100kHz, VCOM = 1VRMS, (See Figure 6) f = 20Hz to 20kHz, VCOM = 2VP-P, RL = 600 TEMP (C) 25 25 25 25 25 25 (NOTE 4) MIN TYP -82 68 -98 0.003 106 212 (NOTE 4) MAX UNITS pC dB dB % pF pF
PARAMETER Charge Injection, Q OFF Isolation Crosstalk (Channel-to-Channel) Total Harmonic Distortion
NO or NC OFF Capacitance, COFF f = 1MHz, VNO or VNC = VCOM = 0V, (See Figure 7) COM ON Capacitance, CCOM(ON) f = 1MHz, VNO or VNC = VCOM = 0V, (See Figure 7)
POWER SUPPLY CHARACTERISTICS Positive Supply Current, I+ V+ = 3.6V, VIN = 0V or V+ 25 Full DIGITAL INPUT CHARACTERISTICS Input Voltage Low, VINL Input Voltage High, VINH Input Current, IINH, IINL V+ = 3.6V, VIN = 0V or V+, (Note 7) Full Full Full 1.4 -0.5 0.5 0.5 V V A 23 720 nA nA
Electrical Specifications - 1.8V Supply
Test Conditions: V+ = +1.65V to +2V, GND = 0V, VINH = 1.0V, VINL = 0.4V (Notes 3, 5), Unless Otherwise Specified TEST CONDITIONS TEMP (C) (NOTE 4) MIN TYP (NOTE 4) MAX UNITS
PARAMETER ANALOG SWITCH CHARACTERISTICS Analog Signal Range, VANALOG ON Resistance, RON
Full V+ = 1.65V, ICOM = 100mA, VNO or VNC = 0V to V+, (See Figure 5) 25 Full
0 -
0.45 -
V+ 0.8 0.85
V
DYNAMIC CHARACTERISTICS Turn-ON Time, tON V+ = 1.65V, VNO or VNC = 1.0V, RL = 50, CL = 35pF, (See Figure 1, Note 7) V+ = 1.65V, VNO or VNC = 1.0V, RL = 50, CL = 35pF, (See Figure 1, Note 7) V+ = 2.0V, VNO or VNC = 1.0V, RL = 50, CL = 35pF, (See Figure 3, Note 7) CL = 1.0nF, VG = 0V, RG = 0, (See Figure 2) RL = 50, CL = 5pF, f = 100kHz, VCOM = 1VRMS, (See Figure 4) RL = 50, CL = 5pF, f = 100kHz, VCOM = 1VRMS, (See Figure 6) 25 Full 25 Full Full 25 25 25 25 25 2 18 10 5 -44 68 -98 106 212 23 25 15 18 ns ns ns ns ns pC dB dB pF pF
Turn-OFF Time, tOFF
Break-Before-Make Time Delay, tD Charge Injection, Q OFF Isolation Crosstalk (Channel-to-Channel)
NO or NC OFF Capacitance, COFF f = 1MHz, VNO or VNC = VCOM = 0V, (See Figure 7) COM ON Capacitance, CCOM(ON) f = 1MHz, VNO or VNC = VCOM = 0V, (See Figure 7)
DIGITAL INPUT CHARACTERISTICS Input Voltage Low, VINL Input Voltage High, VINH Input Current, IINH, IINL V+ = 2.0V, VIN = 0V or V+, (Note 7) Full Full Full 1.0 -0.5 0.4 0.5 V V A
5
FN6098.1
ISL43L420
Electrical Specifications - 1.1V Supply
Test Conditions: V+ = +1.1V, GND = 0V, VINH = 1.0V, VINL = 0.3V (Note 3), Unless Otherwise Specified TEST CONDITIONS TEMP (C) Full V+ = 1.1V, ICOM = 100mA, VNO or VNC = 0V to V+, (See Figure 5) 25 Full 25 Full 25 Full Full (NOTE 4) MIN 0 TYP 2.5 3.1 30 35 15 20 4 (NOTE 4) MAX UNITS V+ V ns ns ns ns ns
PARAMETER ANALOG SWITCH CHARACTERISTICS Analog Signal Range, VANALOG ON Resistance, RON DYNAMIC CHARACTERISTICS Turn-ON Time, tON Turn-OFF Time, tOFF Break-Before-Make Time Delay, tD
V+ = 1.1V, VNO or VNC = 1.0V, RL = 50, CL = 35pF, (See Figure 1, Note 7) V+ = 1.1V, VNO or VNC = 1.0V, RL = 50, CL = 35pF, (See Figure 1, Note 7) V+ = 1.1V, VNO or VNC = 1.0V, RL = 50, CL = 35pF, (See Figure 3, Note 7)
DIGITAL INPUT CHARACTERISTICS Input Voltage Low, VINL Input Voltage High, VINH Input Current, IINH, IINL Positive Supply Current, I+ V+ = 1.1V, VIN = 0V or V+, (Note 7) V+ = 1.1V, VIN = 0V or V+ POWER SUPPLY CHARACTERISTICS 25 Full 0.02 0.6 A A Full Full Full 0.3 0.6 0.5 V V A
Test Circuits and Waveforms
V+ V+ LOGIC INPUT 50% 0V tOFF SWITCH INPUT VNO 90% SWITCH OUTPUT 0V tON VOUT 90% LOGIC INPUT SWITCH INPUT NO or NC COM IN GND RL 50 CL 35pF tr < 5ns tf < 5ns C
VOUT
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
6
FN6098.1
ISL43L420 Test Circuits and Waveforms (Continued)
V+ C
SWITCH OUTPUT VOUT ON
VOUT
RG
NO or NC
COM
VOUT
V+ LOGIC INPUT ON OFF 0V
VG
GND
IN
CL LOGIC INPUT
Q = VOUT x CL
FIGURE 2A. MEASUREMENT POINTS FIGURE 2. CHARGE INJECTION
FIGURE 2B. TEST CIRCUIT
V+
C
V+ LOGIC INPUT 0V
VNX
NO
COM
NC
VOUT RL 50 CL 35pF
IN SWITCH OUTPUT VOUT 90% 0V LOGIC INPUT GND
tD
CL includes fixture and stray capacitance. FIGURE 3B. TEST CIRCUIT FIGURE 3. BREAK-BEFORE-MAKE TIME
FIGURE 3A. MEASUREMENT POINTS
V+ C SIGNAL GENERATOR RON = V1/100mA
NO or NC NO or NC
V+ C
VNX IN 0V or V+ 1mA V1 IN 0V or V+
ANALYZER RL
COM
COM
GND
GND
FIGURE 4. OFF ISOLATION TEST CIRCUIT
FIGURE 5. RON TEST CIRCUIT
7
FN6098.1
ISL43L420 Test Circuits and Waveforms (Continued)
V+ C V+ C SIGNAL GENERATOR
NO or NC COM
50
NO or NC
IN1 0V or V+ IMPEDANCE ANALYZER
COM NC or NO COM
IN
0V or V+
ANALYZER RL
N.C.
GND
GND
FIGURE 6. CROSSTALK TEST CIRCUIT
FIGURE 7. CAPACITANCE TEST CIRCUIT
Detailed Description
The ISL43L420 is a bidirectional, quad single pole/double throw (SPDT) analog switch that offers precise switching capability from a single 1.1V to 4.5V supply with low onresistance (0.24) and high speed operation (tON = 8ns, tOFF = 5ns). The device is especially well suited for portable battery powered equipment due to its low operating supply voltage (1.1V), low power consumption (2.7W max), low leakage currents (150nA max), and the tiny QFN package. The ultra low on-resistance and RON flatness provide very low insertion loss and distortion to applications that require signal reproduction. 1V above GND. The low leakage current performance is unaffected by this approach, but the switch signal range is reduced and the 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 to GND (See Figure 8). To prevent forward biasing these diodes, V+ must be applied before any input signals, and the 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. This method is not acceptable 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 8
GND OPTIONAL PROTECTION DIODE
FIGURE 8. OVERVOLTAGE PROTECTION
Power-Supply Considerations
The ISL43L420 construction is typical of most single supply CMOS analog switches, in that they have two supply pins: V+ and GND. V+ and GND drive the internal CMOS switches and set their analog voltage limits. Unlike switches with a 4V maximum supply voltage, the ISL43L420 4.7V maximum supply voltage provides plenty of room for the 10% tolerance of 4.3V supplies, as well as room for overshoot and noise spikes. The minimum recommended supply voltage is 1.1V. 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.
FN6098.1
ISL43L420
V+ and GND also power the internal logic and level shifters. The level shifters 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. the amount of feedthrough from one switch to another. Figure 20 details the high Off Isolation and Crosstalk rejection provided by this part. At 100kHz, Off Isolation is about 68dB 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 1.8V CMOS compatible (0.5V and 1.4V) over a supply range of 2.0V to 3.6V (See Figure 16). At 3.6V the VIH level is about 1.27V. This is still below the 1.8V CMOS guaranteed high output minimum level of 1.4V, but noise margin is reduced. 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, the signal response is reasonably flat even past 30MHz with a -3dB bandwidth of 104MHz (See Figure 19). 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
Typical Performance Curves
0.31 0.3 0.29 0.28 0.27 0.26 RON () 0.25 0.24 0.23 0.22 0.21 0.2 0.19 0.18 0 1 2 VCOM (V) 3 V+ = 4.3V V+ = 3.6V V+ = 3V V+ = 2.7V
TA = 25C, Unless Otherwise Specified
3 ICOM = 100mA 2.5 ICOM = 100mA
2 RON () V+ = 1.1V 1.5
1 V+ = 1.5V 0.5 V+ = 1.8V 0 0.5 V+ = 1.65V 1 VCOM (V) 1.5 2
0 4 5
FIGURE 9. ON RESISTANCE vs SUPPLY VOLTAGE vs SWITCH VOLTAGE
FIGURE 10. ON RESISTANCE vs SUPPLY VOLTAGE vs SWITCH VOLTAGE
9
FN6098.1
ISL43L420 Typical Performance Curves
0.28 0.26 0.24 0.22 0.2 25C 0.18 0.16 -40C 0.14 0 1 2 VCOM (V) 3 4 5 0.15 0 0.5 1 1.5 VCOM (V) 2 2.5 3 0.2 -40C 85C V+ = 4.3V ICOM = 100mA
TA = 25C, Unless Otherwise Specified (Continued)
0.35 V+ = 2.7V ICOM = 100mA
0.3 85C
RON ()
RON ()
0.25 25C
FIGURE 11. ON RESISTANCE vs SWITCH VOLTAGE
FIGURE 12. ON RESISTANCE vs SWITCH VOLTAGE
3.5
0.5
V+ = 1.8V ICOM = 100mA 85C
-40C 3 2.5 25C
V+ = 1.1V ICOM = 100mA
0.45
0.4 RON () RON () 2 1.5 1 0.5 0 0 0.5 1 VCOM (V) 1.5 2
0.35
85C
0.3 -40C 0.25
25C
0.2
0
0.2
0.4
0.6 VCOM (V)
0.8
1
1.2
FIGURE 13. ON RESISTANCE vs SWITCH VOLTAGE
FIGURE 14. ON RESISTANCE vs SWITCH VOLTAGE
50
1.5 1.4 1.3
0 V+ = 1.8V Q (pC) V+ = 3V -50 VINH AND VINL (V)
1.2 1.1 1 0.9 0.8 0.7 0.6 0.5 0.4 VINL VINH
-100
-150 0 0.5 1 1.5 VCOM (V) 2 2.5 3
0.3
1
1.5
2
2.5 V+ (V)
3
3.5
4
4.5
FIGURE 15. CHARGE INJECTION vs SWITCH VOLTAGE
FIGURE 16. DIGITAL SWITCHING POINT vs SUPPLY VOLTAGE
10
FN6098.1
ISL43L420 Typical Performance Curves
50
TA = 25C, Unless Otherwise Specified (Continued)
20
40 15 30 85C
tOFF (ns)
tON (ns)
10
85C
25C
20
25C
-40C 5
10
-40C
0
1
1.5
2
2.5 3 V+ (V)
3.5
4
4.5
0
1
1.5
2
2.5 3 V+ (V)
3.5
4
4.5
FIGURE 17. TURN-ON TIME vs SUPPLY VOLTAGE
FIGURE 18. TURN-OFF TIME vs SUPPLY VOLTAGE
NORMALIZED GAIN (dB)
-10 V+ = 3V 0 -20 CROSSTALK (dB) GAIN -20 -30 -40 -50 -60
V+ = 3V
10 20 30 OFF ISOLATION (dB) 5 40 50 60 ISOLATION 70 80 CROSSTALK 90 100 10K 100K 1M 10M FREQUENCY (Hz) 110 100M 500M
20 40 60 80 RL = 50 VIN = 0.2VP-P to 2VP-P 1 10 100 FREQUENCY (MHz)
PHASE (DEGREES)
PHASE
0
-70 -80 -90
100 600
-100 -110 1K
FIGURE 19. FREQUENCY RESPONSE
FIGURE 20. CROSSTALK AND OFF ISOLATION
100 V+ = 4.5V
50 V+ = 4.5V VCOM = 0.3V 0 25C
50
iON (nA)
0
iOFF (nA)
25C
-50
-50 85C -100 0 1 2 3 VCOM/NX (V) 4 5
-100
85C
-150
0
1
2 VNX (V)
3
4
FIGURE 21. ON LEAKAGE vs SWITCH VOLTAGE
FIGURE 22. OFF LEAKAGE vs SWITCH VOLTAGE
11
FN6098.1
ISL43L420 Die Characteristics
SUBSTRATE POTENTIAL (POWERED UP): GND (QFN Paddle Connection: To Ground or Float) TRANSISTOR COUNT: TBD 228 PROCESS: Si Gate CMOS
12
FN6098.1
ISL43L420 Quad Flat No-Lead Plastic Package (QFN) Micro Lead Frame Plastic Package (MLFP)
2X A 9 D1 D1/2 6 INDEX AREA N 1 2 3 E1/2 E1 9 2X 0.15 C B 2X 0.15 C A 4X 0 TOP VIEW A2 B E/2 E 2X 0.15 C B D D/2 0.15 C A
L16.3x3
16 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE MILLIMETERS SYMBOL A A1 A2 A3 b D D1 D2 E E1 E2 1.35 0.20 0.30 e k L N Nd Ne P 1.35 0.18 MIN 0.80 NOMINAL 0.90 0.20 REF 0.23 3.00 BSC 2.75 BSC 1.50 3.00 BSC 2.75 BSC 1.50 0.50 BSC 0.40 16 4 4 0.60 12 0.50 1.65 1.65 0.30 MAX 1.00 0.05 1.00 NOTES 9 9 5, 8 9 7, 8, 10 9 7, 8, 10 8 2 3 3 9 9 Rev. 1 6/04
A
/ / 0.10 C 0.08 C
C
SEATING PLANE
SIDE VIEW NX b 5
A3
A1
9
4X P D2 (DATUM B) 4X P D2 2N
0.10 M C A B 7 8 NX k
1 (DATUM A) 6 INDEX AREA NX L Ne 8 (Nd-1)Xe REF. BOTTOM VIEW A1 NX b 5 2 3 E2 7 E2/2 8 (Ne-1)Xe REF.
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.
C L
9 CORNER OPTION 4X
SECTION "C-C" C L
9. Features and dimensions A2, A3, D1, E1, P & are present when Anvil singulation method is used and not present for saw singulation.
L1 e 10 L
L1 CC e
10
L
10. Compliant to JEDEC MO-220VEED-2 Issue C, except for the E2 and D2 MAX dimension.
TERMINAL TIP FOR EVEN TERMINAL/SIDE
FOR ODD TERMINAL/SIDE
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation's quality certifications can be viewed at www.intersil.com/design/quality
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.
For information regarding Intersil Corporation and its products, see www.intersil.com 13
FN6098.1

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