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19-2044; Rev 0; 5/01
Low-Voltage, 60 Dual SPDT Analog Switch in QFN
General Description
The MAX4695 is a low-voltage, dual single-pole/doublethrow (SPDT) analog switch that operates from a single +1.8V to +5.5V supply. The MAX4695 features breakbefore-make switching action with a tON = 30ns and tOFF = 18ns at +3V. When powered from a +2.7V supply, the device has a 60 (max) on-resistance (RON), with 3 (max) RON matching and 10 max RON flatness. The digital logic inputs are 1.8V-logic compatible from a +2.7V to +3.3V supply. The MAX4695 is available in both a space-saving 12-pin QFN (3mm x 3mm) package and a 10-pin MAX package. o 3mm x 3mm 12-Pin QFN Package o Guaranteed On-Resistance: 60 (max) (+2.7V supply) 25 (typ) (+5V supply) o Guaranteed Match Between Channels: 3 (max) o Guaranteed Flatness Over Signal Range: 10 (max) o Guaranteed Low Leakage Currents: 100pA (max) at +25C o Switching Time: tON = 30ns, tOFF = 18ns o +1.8V to +5.5V Single-Supply Operation o Rail-to-Rail(R) Signal Handling o -3dB Bandwidth: >300MHz o Low Crosstalk: -82dB (1MHz) o High Off-Isolation: -75dB (1MHz) o Low 4pC Charge Injection o THD: 0.03% o +1.8V CMOS-Logic Compatible
Features
MAX4695
Applications
MP3 Players Battery-Operated Equipment Relay Replacement Audio and Video Signal Routing Low-Voltage Data-Acquisition Systems Communications Circuits PCMCIA Cards Cellular Phones Modems
Ordering Information
PART TEMP. RANGE -40C to 85C -40C to 85C PIN-PACKAGE 12 QFN 10 MAX
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
MAX4695EGC MAX4695EUB
Pin Configurations
TOP VIEW
IN1 1 NO1 2 GND 3 NO2 4 IN2 5 MAX 10 COM1 9 NC1 V+ IN_ NC2 0 6 COM2 1 OFF ON ON OFF MAX4695 NO_ NC_ NO2 3 4 IN2 5 COM2 QFN 6 N.C. 7 NC2 NO1 GND 1 2 9 8 NC1 V+
IN1
COM1 N.C. 11 10
12
MAX4695
8 7
MAX4695
SWITCHES SHOWN FOR LOGIC "0" INPUT
________________________________________________________________ Maxim Integrated Products
1
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Low-Voltage, 60 Dual SPDT Analog Switch in QFN MAX4695
ABSOLUTE MAXIMUM RATINGS
(Voltages Referenced to GND) V+ ............................................................................-0.3V to +6V All Other Pins (Note 1) .............................. -0.3V to (V+ + 0.3V) Continuous Current COM_, NO_, NC_ .............................20mA Peak Current COM_, NO_, NC_ (pulsed at 1ms, 10% duty cycle) ...............................40mA ESD per Method 3015.7 .........................................................2kV Continuous Power Dissipation (TA = +70C) 10-Pin MAX (derate 4.7mW/C above +70C) ......... 330mW 12-Pin QFN (derate 11.9mW/C above +70C) ......... 952mW Operating Temperature Range .......................... -40C to +85C Storage Temperature Range ........................... -65C to +150C Lead Temperature (soldering, 10s) ............................... +300C
Note 1: Signals on IN_, COM_, NO_, and NC_ exceeding V+ or GND are clamped by internal diodes. Limit forward-diode current to maximum current rating.
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS--Single +3V Supply
(V+ = +2.7V to +3.3V, VIH = +1.4V, VIL = +0.5V, TA = -40C to +85C, unless otherwise noted. Typical values are at V+ = +3V and TA = +25C.) (Notes 2, 9)
PARAMETER ANALOG SWITCH Analog Signal Range On-Resistance On-Resistance Match Between Channels (Note 3) On-Resistance Flatness (Note 4) NO_, NC_ Off-Leakage Current (Note 5) COM_ On-Leakage Current (Note 5) DYNAMIC Turn-On Time Turn-Off Time Break-Before-Make Time (Note 6) Charge Injection On-Channel -3dB Bandwidth Off-Isolation (Note 7) tON tOFF tBBM Q BW VISO VNO or VNC_ = +1.5V, RL = 300, CL = 35pF, Figure 2 VNO or VNC_ = +1.5V, RL = 300, CL = 35pF, Figure 2 VNO or VNC_ = +1.5V, RL = 300, CL = 35pF, Figure 3 VGEN = 0, RGEN = 0, CL = 1.0nF, Figure 4 Signal = 0dBm, 50 in and out, Figure 5 f = 1MHz, RL = 50, CL = 5pF, Figure 5 +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX 2 4 300 -75 12 12 24 30 40 18 20 ns ns ns pC MHz dB VCOM_, VNO_, VNC__ RON RON RFLAT (ON) INO_(OFF), INC_(OFF) ICOM _(ON) V+ = +2.7V, ICOM_ = 1mA, VNO_ or VNC_ = +1.4V V+ = +2.7V, ICOM_ = 1mA, VNO_ or VNC_ = +1.4V V+ = +2.7V, ICOM_ = 1mA, VNO_ or VNC_ = +1V, +1.4V, +1.8V V+ = +3.3V, VCOM_ = +0.3V, +3V VNO_ or VNC_ = +3V, +0.3V V+ = +3.3V, VCOM_ = +0.3V, +3V VNO_ or VNC_ = +0.3V, +3V, or floating +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX -0.1 -1 -0.2 -2 0.01 0.01 6 0.5 0 40 V+ 60 70 3 4 10 15 0.1 1 0.2 2 V nA nA SYMBOL CONDITION TA MIN TYP MAX UNITS
2
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Low-Voltage, 60 Dual SPDT Analog Switch in QFN
ELECTRICAL CHARACTERISTICS--Single +3V Supply (continued)
(V+ = +2.7V to +3.3V, VIH = +1.4V, VIL = +0.5V, TA = -40C to +85C, unless otherwise noted. Typical values are at V+ = +3V and TA = +25C.) (Notes 2, 9)
PARAMETER Crosstalk (Note 8) Total Harmonic Distortion NO_, NC_ Off-Capacitance COM_ On-Capacitance DIGITAL I/O Input Logic High Input Logic Low Input Leakage Current SUPPLY Power-Supply Range Power-Supply Current V+ I+ V+ = +5.5V, VIN_ = 0 or V+ 1.8 5.5 1 V A VIH VIL IIH, IIL VIN_ = 0 or V+ -1 1.4 0.5 1 V V A SYMBOL VCT THD CNO_(OFF), CNC_(OFF) CCOM_(ON) CONDITION f = 1MHz, RL = 50, CL = 5pF, Figure 5 f = 20Hz to 20kHz, 2Vp-p, RL = 600 f = 1MHz, VNO_ or VNC_ = GND, Figure 6 f = 1MHz, VNO_ or VNC_ = GND, Figure 6 TA MIN TYP -82 0.03 7 19 MAX UNITS dB % pF pF
MAX4695
ELECTRICAL CHARACTERISTICS--Single +5V Supply
(V+ = +4.5V to +5.5V, VIH = +2.0V, VIL = +0.8V, TA = -40C to +85C, unless otherwise noted. Typical values are at V+ = +5V and TA = +25C.) (Notes 2, 9)
PARAMETER ANALOG SWITCH Analog Signal Range On-Resistance On-Resistance Match Between Channels (Note 3) On-Resistance Flatness (Note 4) NO_, NC_ Off-Leakage Current (Note 5) COM_ On-Leakage Current (Note 5) DYNAMIC Turn-On Time Turn-Off Time tON tOFF VNO_, VNC_ = +3V, RL = 300, CL = 35pF, Figure 2 VNO_, VNC_ = +3V, RL = 300, CL = 35pF, Figure 2 +25C TMIN to TMAX +25C TMIN to TMAX 8 17 25 30 15 20 ns ns VCOM_, VNO_, VNC_ RON RON RFLAT (ON) INO_(OFF), INC_(OFF) ICOM _(ON) V+ = +4.5V, ICOM_ = 1mA, VNO_ or VNC_ = +3.5V V+ = +4.5V, ICOM_ = 1mA, VNO_ or VNC_ = +3.5V V+ = +4.5V, ICOM_ = 1mA, VNO_ or VNC_ = +1V, +2.5V, +3.5V V+ = +5.5V, VCOM_ = +1V, +4.5V VNO_ or VNC_ = +4.5V, +1V V+ = +5.5V, VCOM_ = +1V, +4.5V VNO_ or VNC_ = +1V, +4.5V, or floating +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX -0.1 -1 -0.2 -2 0.01 0.01 4 0.5 0 25 V+ 35 40 2 3 8 10 0.1 1 0.2 2 V nA nA SYMBOL CONDITION TA MIN TYP MAX UNITS
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Low-Voltage, 60 Dual SPDT Analog Switch in QFNSwitch MAX4695
ELECTRICAL CHARACTERISTICS--Single +5V Supply (continued)
(V+ = +4.5V to +5.5V, VIH = +2.0V, VIL = +0.8V, TA = -40C to +85C, unless otherwise noted. Typical values are at V+ = +5V and TA = +25C.) (Notes 2, 9)
PARAMETER Break-Before-Make Time (Note 6) Charge Injection On-Channel -3dB Bandwidth Off-Isolation (Note 7) Crosstalk (Note 8) Total Harmonic Distortion DIGITAL I/O Input Logic High Input Logic Low Input Leakage Current SUPPLY Power-Supply Range Positive Supply Current V+ I+ V+ = +5.5V, VIN = 0 or V+ 1.8 5.5 1 V A VIH VIL IIH, IIL VIN_ = 0 or V+ -1 2.0 0.8 1 V V A SYMBOL tBBM Q BW VISO VCT THD CONDITION VNO_, VNC_ = +3V, RL = 300, CL = 35pF, Figure 3 VGEN = 0, RGEN = 0, CL = 1.0nF, Figure 4 Signal = 0dBm, 50 in and out, Figure 5 f = 1MHz, RL = 50, CL = 5pF, Figure 5 f = 1MHz, RL = 50, CL = 5pF, Figure 5 f = 20Hz to 20kHz, 2Vp-p, RL = 600 TA +25C TMIN to TMAX 2 8 300 -75 -82 0.02 MIN TYP 9 MAX UNITS ns pC MHz dB dB %
Note 2: The algebraic convention, where the most negative value is a minimum and the most positive value a maximum, is used in this data sheet. Note 3: RON = RON(MAX) - RON(MIN). Note 4: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal ranges. Note 5: Leakage currents are 100% tested at TA = +85C. Limits across the full temperature range are guaranteed by correlation. Note 6: Guaranteed by design. Note 7: Off-Isolation = 20log10 (VCOM_ / VNO_), VCOM_ = output, VNO_ = input to off switch. Note 8: Between any two switches. Note 9: -40C specifications are guaranteed by design.
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Low-Voltage, 60 Dual SPDT Analog Switch in QFN
Typical Operating Characteristics
(TA = +25C, unless otherwise noted.)
MAX4695
ON-RESISTANCE vs. VCOM
MAX4695 toc01
ON-RESISTANCE vs. VCOM
MAX4695 toc02
ON-RESISTANCE vs. VCOM
45 40 35 RON () 30 25 20 15 10 5 TA = +25C TA = -40C TA = +85C V+ = +3V
MAX4695 toc03
140 120 100 RON () 80 60 40 20 0 0 1 2 V+ = +5.5V 3 4 5 V+ = +2.5V V+ = +3V V+ = +5V V+ = +1.8V
60 50 40 RON () 30 TA = +25C 20 10 0 0 0.5 1.0 1.5 TA = +85C
50
V+ = +2.5V
TA = -40C
0 2.0 2.5 0 0.5 1.0 1.5 VCOM (V) 2.0 2.5 3.0 VCOM (V)
VCOM (V)
ON-RESISTANCE vs. VCOM
MAX4695 toc04
SUPPLY CURRENT vs. TEMPERATURE
MAX4695 toc05
40 35 30 RON () 25 20 15 10 5 0 0 TA = +25C TA = +85C
V+ = +5V
10,000 1000 SUPPLY CURRENT (pA) 100 10 V+ = +3V 1 0.1 0.01 -40 -15 10 35 60 V+ = +5V
TA = -40C
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 VCOM (V)
85
TEMPERATURE (C)
SUPPLY CURRENT vs. LOGIC INPUT VOLTAGE
1000 100 SUPPLY CURRENT (A) 10 1 0.1 0.01 0.001 0.0001 0.00001 0.000001 0 1 2 3 4 5 LOGIC LEVEL (V) 0.1 -40 1 V+ = +3V V+ = +5V
MAX4695 toc06
ON-LEAKAGE CURRENT vs. TEMPERATURE
MAX4695 toc07
10,000
1000
100 ON-LEAKAGE (pA) V+ = +5V 10 V+ = +3V
-15
10
35
60
85
TEMPERATURE (C)
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Low-Voltage, 60 Dual SPDT Analog Switch in QFN MAX4695
Typical Operating Characteristics (continued)
(TA = +25C, unless otherwise noted.)
OFF-LEAKAGE CURRENT vs. TEMPERATURE
MAX4695 toc08
LOGIC THRESHOLD VOLTAGE vs. SUPPLY VOLTAGE
MAX4695 toc09
TURN-ON/OFF TIME vs. SUPPLY VOLTAGE
45 40 35 tON/OFF (ns)
MAX4695 toc10
1000
1.5 LOGIC THRESHOLD VOLTAGE (V)
50
VIN_ RISING 1.0 VIN_ FALLING
100 OFF-LEAKAGE (pA) V+ = +5V 10 V+ = +3V 1
30 25 20 15 10 5 tOFF 1 2 3 4 5 6 tON
0.5
0.1 -40 -15 10 35 60 85 TEMPERATURE (C)
0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 SUPPLY VOLTAGE (V)
0 SUPPLY VOLTAGE (V)
TURN-ON/OFF TIME vs. TEMPERATURE
MAX4695 toc11
CHARGE INJECTION vs. VCOM
MAX4695 toc12
30 25 20 tON/OFF (ns) 15 10 tON, V+ = +5V 5 tOFF, V+ = +5V tON, V+ = +3V tOFF, V+ = +3V
16
12 V+ = +5V Q (pC) 8
4 V+ = +3V 0
-4
0 -40 -15 10 35 60 85 TEMPERATURE (C)
0
1
2
3
4
5
VCOM (V)
FREQUENCY RESPONSE
MAX4695 toc13
TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY
RL = 600
MAX4695 toc14
0 ON-RESPONSE -20 -40
0.1
THD + N (%)
LOSS (dB)
-60 -80 -100
OFF-ISOLATION CROSSTALK
V+ = +3V
V+ = +5V -120 0.1 1 10 FREQUENCY (MHz) 100 1000 0.01 10 100 1k FREQUENCY (Hz) 10k 100k
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Low-Voltage, 60 Dual SPDT Analog Switch in QFN
Pin Description
PIN MAX 1 2 3 4 5 6 -- 7 8 9 10 QFN 12 1 2 3 4 5 6, 10 7 8 9 11 NAME IN1 NO1 GND NO2 IN2 COM2 N.C. NC2 V+ NC1 COM1 Digital Control Input Switch 1 Analog Switch 1--Normally Open Terminal Ground Analog Switch 2--Normally Open Terminal Digital Control Input Switch 2 Analog Switch 2--Common Terminal No Connection. Not internally connected. Analog Switch 2--Normally Closed Terminal Positive Supply Voltage Input Analog Switch 1--Normally Closed Terminal Analog Common Switch 1 FUNCTION
MAX4695
Detailed Description
The MAX4695 is a low-voltage, dual single-pole/double-throw (SPDT) analog switch that operates from a single +1.8V to +5.5V supply. When powered from a +2.7V supply, the device has a 60 (max) on-resistance (RON), with 3 (max) RON matching and 10 (max) RON flatness. The digital logic inputs are 1.8Vlogic compatible from a +2.7V to +3.3V supply.
a small signal diode (D1) as shown in Figure 1. If the analog signal can dip below GND, add D2. Adding protection diodes reduces the analog range to a diode drop (about 0.7V) below V+ (for D1), and a diode drop above ground (for D2). On-resistance increases slightly at low supply voltages. Maximum supply voltage (V+) must not exceed +6V. Adding protection diode D2 causes the logic threshold to be shifted relative to GND. TTL compatibility is not guaranteed when D2 is added. Protection diodes D1 and D2 also protect against some overvoltage situations. In the circuit in Figure 1, if the supply voltage is below the absolute maximum rating, and if a fault voltage up to the absolute maximum rating is applied to an analog signal pin, no damage will result.
POSITIVE SUPPLY D1 V+
Applications Information
Digital Control Inputs
The MAX4695 logic inputs are 1.8V CMOS logic compatible for 3V operation and TTL compatible for 5V operation of V+. Driving IN_ rail-to-rail minimizes power consumption.
Analog Signal Levels
Analog signals that range over the entire supply voltage (V+ to GND) are passed with very little change in on-resistance (see Typical Operating Characteristics). The switches are bidirectional, so the NO_, NC_, and COM_ pins can be either inputs or outputs.
MAX4695
Power-Supply Sequencing and Overvoltage Protection
Caution: Do not exceed the absolute maximum ratings because stresses beyond the listed ratings may cause permanent damage to devices. Proper power-supply sequencing is recommended for all CMOS devices. Always apply V+ before applying analog signals, especially if the analog signal is not current limited. If this sequencing is not possible, and if the analog inputs are not current limited to <20mA, add
Vg
NO
COM
GND D2
Figure 1. Overvoltage Protection Using Two External Blocking Diodes 7
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Low-Voltage, 60 Dual SPDT Analog Switch in QFN MAX4695
Test Circuits/Timing Diagrams
V+ t r < 5ns t f < 5ns
MAX4695
NO_ VN_ OR NC_ V+ COM_ RL 300 IN_ GND VOUT CL 35pF
LOGIC INPUT
VINH 50% VINL t OFF VOUT 0.9 x V0UT 50%
VIN_ LOGIC INPUT
0.9 x VOUT
SWITCH OUTPUT
0 t ON
CL INCLUDES FIXTURE AND STRAY CAPACITANCE. RL VOUT = VN_ RL + RON
(
)
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES THAT HAVE THE OPPOSITE LOGIC SENSE.
Figure 2. Switching Time
MAX4695
VN_ NC_
V+ V+ COM_ NO_ VIN_ IN_ RL 300 GND VOUT CL 35pF VOUT LOGIC INPUT
VINH 50% VINL
LOGIC INPUT
0.9 x V0UT tD
0.9 x VOUT
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
Figure 3. Break-Before-Make Interval
V+
MAX4695
V+ RGEN NC_ OR NO_ COM_ CL 1nF GND IN OFF ON Q = (V OUT )(C L ) VOUT VOUT IN OFF ON
VOUT
OFF
V GEN
VINL TO VINH
IN
OFF
IN DEPENDS ON SWITCH CONFIGURATION; INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
Figure 4. Charge Injection 8 _______________________________________________________________________________________
Low-Voltage, 60 Dual SPDT Analog Switch in QFN MAX4695
Test Circuits/Timing Diagrams (continued)
+5V 10nF NETWORK ANALYZER 0 OR V+ IN_ V+ COM_ VIN 50 50 V OFF-ISOLATION = 20log OUT VIN ON-LOSS = 20log VOUT VIN
NC_ 50
MAX4695
NO_ GND
VOUT
MEAS
REF
V CROSSTALK = 20log OUT VIN
50
50
MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS. OFF-ISOLATION IS MEASURED BETWEEN COM_ AND "OFF" NO_ OR NC_ TERMINAL ON EACH SWITCH. ON-LOSS IS MEASURED BETWEEN COM_ AND "ON" NO_ OR NC_TERMINAL ON EACH SWITCH. CROSSTALK IS MEASURED FROM ONE CHANNEL TO ALL OTHER CHANNELS. SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
Figure 5. Off-Isolation/On-Channel Bandwidth, Crosstalk
10nF
V+
Chip Information
TRANSISTOR COUNT: 130
V+ COM_
MAX4695
VINL OR VINH
IN_ CAPACITANCE METER f = 1MHz NC_ or NO_ GND
Figure 6. Channel Off/On Capacitance
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Low-Voltage, 60 Dual SPDT Analog Switch in QFN MAX4695
Package Information
32L QFN, 3x3x0.85.EPS
10
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Low-Voltage, 60 Dual SPDT Analog Switch in QFN
Package Information (continued)
10LUMAX.EPS
MAX4695
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11 (c) 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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