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19-0558; Rev 1; 11/07
Quad SPDT Audio Switches
General Description
The MAX4740/MAX4740H low on-resistance (0.61 typ) analog switches operate from a single 1.6V to 5.5V supply. The MAX4740/MAX4740H are quad, singlepole, double-throw (SPDT) switches and are configured to route audio signals. The MAX4740/MAX4740H are pin-to-pin compatible parts with the ST Microelectronics quad SPDT STG3699 analog switch. The MAX4740 is a quad SPDT switch and the MAX4740H is a quad SPDT switch that can be placed in a high-impedance mode. Switching logic is controlled by 2 control bits (CB1 and CB2). The MAX4740/ MAX4740H also feature a low on-resistance match (0.06) and low power-supply current (0.3A), which increases battery life. The MAX4740/MAX4740H are available in a tiny 3mm x 3mm, 16-pin TQFN-EP, and 2.5mm x 2.5mm, 16-pin ultrathin QFN packages.
Features
Low On-Resistance (0.61 typ) 0.06 (typ) Channel-to-Channel Matching 0.32 (typ) On-Resistance Flatness 1.6V to 5.5V Single-Supply Voltage High PSRR Reduces Supply Noise (-60dB typ) 0.08% Total Harmonic Distortion -68dB typ Crosstalk (100kHz) -64dB typ Off-Isolation (100kHz) Low Supply Current (0.3A typ) Low Leakage Current (0.1A typ) Pin-to-Pin Compatible with ST Micro STG3699 (3mm x 3mm) 16-Pin TQFN, and (2.5mm x 2.5mm) 16-Pin Ultra-Thin QFN Packages
MAX4740/MAX4740H
Ordering Information
PART MAX4740ETE+ MAX4740EVE+ MAX4740HETE+ MAX4740HEVE+ PIN-PACKAGE 16 TQFN-EP (3mm x 3mm) 16 Ultra-Thin QFN (2.5mm x 2.5mm) 16 TQFN-EP (3mm x 3mm) 16 Ultra-Thin QFN (2.5mm x 2.5mm) TOP MARK AEV +AAA AEW +AAB PKG CODE T1633-4 V162A2-1 T1633-4 V162A2-1
Applications
Voice Switching Cellular Phones PDAs and other Handheld Devices MP3 Player Notebook Computers
Typical Operating Circuit
1.6V to 5.5V VCC NO1
Note: All devices are guaranteed over the -40C to +85C temperature range. EP = Exposed pad.
Pin Configuration
COM4
COM1
NO4
BASEBAND (SPEECH)
NC1 INTERNAL SPEAKER COM2 NC2 CB1 CB2 NO3 COM3 NC3 BLOCKING CAPS EXTERNAL HEADPHONES
NO2
12
11
10
NC4
CONTROL LOGIC
13 14 15 16 +
NC3 9
CB2
TOP VIEW
8 7
COM3 NO3 GND
VCC NO1 COM1
MAX4740 MAX4740H
*EP
6 5
NO4 COM4 MIDI (RINGER) NC4 GND EXTERNAL HEADPHONES
1 NC1
2 CB1
3 NO2
4 COM2
MAX4740
3mm x 3mm Thin QFN/ 2.5mm x 2.5mm Ultra-Thin QFN
*CONNECT EP TO GND OR LEAVE EP UNCONNECTED.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
Quad SPDT Audio Switches MAX4740/MAX4740H
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.) VCC, CB_ ...............................................................-0.3V to +6.0V COM_, NC_, NO_ .......................................-0.3V to (VCC + 0.3V) Continuous Current NO_, NC_, COM_ ..........................300mA Peak Current NO_, NC_, COM_ (pulsed at 1ms, 50% duty cycle).................................400mA Peak Current NO_, NC_, COM_ (pulsed at 1ms, 10% duty cycle).................................500mA Continuous Power Dissipation (TA = +70C) 16-Pin TQFN (3mm x 3mm), Single-Layer Board (derate 15.6mW/C above +70C) ..............................1250mW 16-Pin TQFN (3mm x 3mm), Multilayer Board (derate 20.8mW/C above +70C) ..........................................1667mW 16-Pin Ultra-Thin QFN (2.5mm x 2.5mm), MultiLayer Board (derate 11.5mW/C above +70C) .................923.8mW Operating Temperature Range ...........................-40C to +85C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C
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
(VCC = +2.7V to +5.5V, TA = -40C to +85C, unless otherwise noted. Typical values are at TA = +25C, VCC = +3.3V.) (Note 1)
PARAMETER POWER SUPPLY Supply Voltage Range Supply Current ANALOG SWITCH Analog Signal Range VNC_, VNO_, VCOM_, (Note 2) TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX -1 0.1 0.32 0.06 0.1 0.72 0.87 +1 0 0.61 VCC 0.90 1 V VCC VCC = +5.5V, VCB_ = 0V or VCC ICC VCC = +5.5V, VCB_ = 0.5V or +1.6V VCC = +2.5V, VCB_ = 0.5V or +1.4V 1.6 0.3 0.3 0.1 5.5 1 5 A V SYMBOL CONDITIONS MIN TYP MAX UNITS
On-Resistance
RON
VCC = 3.3V, ICOM_ = 100mA; CB_ = low or high VCC = 3.3V, VNC_ or VNO_ = 0.875V; ICOM_ = 100mA (Note 3) VCC = 3.3V, VCOM_ = 0 to VCC; ICOM_ = 100mA (Note 4)
On-Resistance Match Between Channels
RON
On-Resistance Flatness
RFLAT(NO) INO_(OFF), INC_(OFF) ICOM_(ON)
NO_, NC_ Off-Leakage Current
VCC = 5.5V; VNC_ or VNO_ = 0.3V, 5.5V; VCOM_ = 5.5V or 0.3V VCC = 5.5V, VNC_ or VNO_ = 0.3V, 5.5V, or unconnected; VCOM_ = 0.3V, 5.5V, or unconnected
A
COM_ On-Leakage Current
-1
0.1
+1
A
2
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Quad SPDT Audio Switches
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +2.7V to +5.5V, TA = -40C to +85C, unless otherwise noted. Typical values are at TA = +25C, VCC = 3.3V.) (Note 1)
PARAMETER DYNAMIC CHARACTERISTICS Turn-On Time Turn-Off Time Charge Injection Off-Isolation Crosstalk Power-Supply Rejection Ratio Total Harmonic Distortion NO_, NC_ Off-Capacitance COM_ On-Capacitance DIGITAL INPUTS (CB_) Input Logic-High Input Logic-Low Input Leakage Current VIH VIL IIN -1 0.1 VCC = 1.6V to 2.7V VCC = 2.7V to 5.5V 1.4 1.6 0.5 +1 V V A tON tOFF Q VISO VCT PSRR THD RL = 32, CL = 35pF, Figure 2 RL = 32, CL = 35pF, Figure 2 For NO_, VNO_ = 1V For NC_, VNC_ = 1V For NO_, VNO_ = 1V For NC_, VNC_ = 1V 70 210 210 55 200 -64 -68 -60 0.08 40 150 ns ns pC dB dB dB % pF pF SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX4740/MAX4740H
VGEN_ = 0V; RGEN = 0; CL = 1nF; Figure 3 CL = 5pF; RL = 32; f = 100kHz; VCOM_ = 1VRMS; Figure 4 (Note 5) CL = 5pF; RL = 32; f = 100kHz; VCOM_ = 1VRMS; Figure 4 f = 20kHz, VCOM_ = 1VRMS, RL = 50, CL = 5pF f = 20Hz to 20kHz, VP-P = 0.5V, RL = 32
CNC_(OFF), f = 1MHz, Figure 5 CNO_(OFF) CCOM_(ON) f = 1MHz, Figure 5
Note 1: For TQFN (3mm x 3mm) electrical specifications are production tested at TA = +85C and guaranteed by design at TA = +25C and -40C. For Ultra-Thin QFN (2.5mm x 2.5mm) electrical specifications are production tested at TA = +25C and guaranteed by design at TA = +85C and -40C. Note 2: Signals on COM_, NO_, or NC_ exceeding VCC are clamped by internal diodes. Limit forward-diode current to maximum current rating. 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: Off-isolation = 20log10 [VCOM_/ VNO_], VCOM_ = output, VNO_ = input to off switch.
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Quad SPDT Audio Switches MAX4740/MAX4740H
Typical Operating Characteristics
(VCC = 3.3V, TA = +25C, unless otherwise noted)
ON-RESISTANCE vs. COM VOLTAGE
MAX4740/40H toc01
ON-RESISTANCE vs. COM VOLTAGE
VCC = 5V 0.5 ON-RESISTANCE ()
MAX4740/40H toc02
NC TURN-ON/NO TURN-OFF TIME vs. SUPPLY VOLTAGE
MAX4740/40H toc03
0.7 VCC = 3V 0.6 ON-RESISTANCE () TA = +85C 0.5 TA = +25C 0.4 TA = -40C 0.3
0.6
600
TIME (ns)
0.4 TA = +85C 0.3
400
NC TURN-ON TIME 200
0.2 TA = -40C TA = +25C 0 0 1 2 3 4 5 1.8 2.3 2.8 3.3 3.8 4.3 4.8 5.3 COM VOLTAGE (V) SUPPLY VOLTAGE (V) NO TURN-OFF TIME
0.2 0 0.5 1.0 1.5 2.0 2.5 3.0 COM VOLTAGE (V)
0.1
NO TURN-ON/NC TURN-OFF TIME vs. SUPPLY VOLTAGE
MAX4740/40H toc04
NO TURN-ON/NC TURN-OFF TIME vs. TEMPERATURE
MAX4740/40H toc05
NC TURN-ON/NO TURN-OFF TIME vs. TEMPERATURE
VCC = 3V TURN-ON/TURN-OFF TIME (ns) 400
MAX4740/40H toc06
180 160 TURN-ON/TURN-OFF TIME (ns) 140 120 100 80 60 40 20 1.8 2.3 2.8 3.3 3.8 4.3 4.8 5.3 SUPPLY VOLTAGE (V) NC TURN-OFF TIME NO TURN-ON TIME
100 VCC = 3V TURN-ON/TURN-OFF TIME (ns) 80 NO tON
500
60
300
NC tON
40
NC tOFF
200 NO tOFF
20 -40 -15 10 35 60 85 TEMPERATURE (C)
100 -40 -15 10 35 60 85 TEMPERATURE (C)
LOGIC THRESHOLD vs. SUPPLY VOLTAGE
MAX4740/40H toc07
SUPPLY CURRENT vs. LOGIC INPUT VOLTAGE
MAX4740/40H toc08
CHARGE INJECTION vs. COM VOLTAGE
MAX4740/40H toc09
2.0 VCB RISING
100 90 80 SUPPLY CURRENT (nA) 70 60 50 40 30 20 10 VCC = 3V VCC = 2.5V VCC = 3V
250
CHARGE INJECTION ( pC)
1.6 LOGIC THRESHOLD (V)
200 VCC = 5.0V 150 VCC = 2.0V
1.2 VCB FALLING 0.8
100
0.4
VCC = 2.5V
50
0 1.8 2.3 2.8 3.3 3.8 4.3 4.8 5.3 SUPPLY VOLTAGE (V)
0 0 0.5 1.0 1.4 1.5 2.0 2.5 3.0 LOGIC INPUT VOLTAGE (V)
0 0 1 2 3 4 5 VCOM (V)
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Quad SPDT Audio Switches
Typical Operating Characteristics (continued)
(VCC = 3.3V, TA = +25C, unless otherwise noted)
LEAKAGE CURRENT vs. TEMPERATURE
MAX4740/40H toc10
MAX4740/MAX4740H
FREQUENCY RESPONSE
MAX4740/40H toc11
100,000 10,000 LEAKAGE CURRENT (pA) 1000 100 10 1 0.1 -40 -15 10 35 60 ICOM(OFF)
0
ICOM(ON)
ON-LOSS (dB)
-2
-4
-6 85 0.01 0.1 1 FREQUENCY (MHz) 10 100 TEMPERATURE (C)
OFF-ISOLATION vs. FREQUENCY
MAX4740/40H toc12
CROSSTALK vs. FREQUENCY
MAX4740/40H toc13
0
0
OFF-ISOLATION (dB)
-20
-20 CROSSTALK (dB)
-40
-40
-60
-60
-80 0.001
0.01
0.1 FREQUENCY (MHz)
1
10
-80 0.001
0.01
0.1 FREQUENCY (MHz)
1
10
TOTAL HARMONIC DISTORTION vs. FREQUENCY
MAX4740/40H toc14
POWER-SUPPLY REJECTION RATIO vs. FREQUENCY
MAX4740/40H toc15
1 RL = 32
70 60 50 PSRR (dB) 40 30 20 10
THD (%)
0.1
0.01 10 100 1k FREQUENCY (Hz) 10k 100k
0 0.001
0.01
0.1 FREQUENCY (MHz)
1
10
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Quad SPDT Audio Switches MAX4740/MAX4740H
Pin Description
PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 EP NAME NC1 CB1 NO2 COM2 NC2 GND NO3 COM3 NC3 CB2 NO4 COM4 NC4 VCC NO1 COM1 EP Analog Switch 1--Normally Closed Terminal Digital Control Input for Analog Switch 1 and Analog Switch 2 Analog Switch 2--Normally Open Terminal Analog Switch 2--Common Terminal Analog Switch 2--Normally Closed Terminal Ground Analog Switch 3--Normally Open Terminal Analog Switch 3--Common Terminal Analog Switch 3--Normally Closed Terminal Digital Control Input for Analog Switch 3 and Analog Switch 4 Analog Switch 4--Normally Open Terminal Analog Switch 4--Common Terminal Analog Switch 4--Normally Closed Terminal Positive Supply Voltage Analog Switch 1--Normally Open Terminal Analog Switch 1--Common Terminal Exposed Pad. Connect to GND or leave unconnected for normal operation. FUNCTION
Detailed Description
The MAX4740/MAX4740H quad SPDT audio switches are low on-resistance, low supply current, high powersupply rejection ratio (PSRR) devices that operate from a +1.6V to +5.5V single supply. The MAX4740/ MAX4740H have two digital control inputs, CB1 and CB2, where each bit controls a pair of switches (see Tables 1 and 2).
Table 1. MAX4740 Truth Table
CONTROL CB2 0 0 1 1 CB1 0 1 0 1 SWITCH STATE Switch 3/4 COM = NC COM = NC COM = NO COM = NO Switch 1/2 COM = NC COM = NO COM = NC COM = NO
Applications Information
The MAX4740/MAX4740H logic inputs accept up to +5.5V, regardless of supply voltage. For example with a +3.3V supply, CB1 and CB2 can be driven low to GND and high to +5.5V, allowing for mixed logic levels in a system. Driving CB1 and CB2 rail-to-rail minimizes power consumption. For a 3.3V supply voltage, the logic thresholds are +0.5V (low) and +1.6V (high).
Table 2. MAX4740H Truth Table
CONTROL CB2 0 0 1 1 CB1 0 1 0 1 SWITCH STATE Switch 3/4 COM = NC High-Z COM = NO COM = NO Switch 1/2 COM = NC High-Z COM = NC COM = NO
Analog Signal Levels
Analog signals that range over the entire supply voltage range (V CC to GND) can be passed with very little change in on-resistance (see the Typical Operating Characteristics). The switches are bidirectional, so the NO_, NC_, and COM_ terminals can be used as either inputs or outputs.
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Quad SPDT Audio Switches MAX4740/MAX4740H
MAX4740
NC1 SWITCH 1 NO1 NC2 SWITCH 2 NO2 CB1 CB2 NC3 SWITCH 3 NO3 NC4 SWITCH 4 NO4 CONTROL LOGIC
VCC NC1 COM1 NO1 NC2 COM2 NO2 CB1 CB2 NC3 COM3 NO3 NC4 COM4 NO4 GND Hi Z
MAX4740H
VCC COM1 SWITCH 1
Hi Z SWITCH 2 CONTROL LOGIC
COM2
Hi Z SWITCH 3
COM3
Hi Z SWITCH 4
COM4 GND
Figure 1. Functional Diagram
Test Circuits/Timing Diagrams
MAX4740 MAX4740H
VNC_ OR V NO _ NO_ OR NC_ VCC V CC COM_ LOGIC INPUT VOUT RL CB_ LOGIC INPUT GND SWITCH OUTPUT 0V t ON CL VOUT 0.8 x V0UT t OFF 0.8 x VOUT VCC 50% 0V
t r < 5ns t f < 5ns
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
CB DEPENDS ON SWITCH CONFIGURATION; INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
Figure 2. Switching Time
Power-Supply Sequencing and Overvoltage Protection
Caution: Do not exceed the Absolute Maximum Ratings since stresses beyond the listed ratings may cause permanent damage to the device. Proper power-supply sequencing is recommended for all CMOS devices. Improper supply sequencing can force the switch into latch-up, causing it to draw excessive supply current. The only way out of latch-up is to
recycle the power and reapply properly. Connect all ground pins first, then apply power to VCC , and finally apply signals to NO_, NC_, and COM_. Follow the reverse order upon power-down.
Chip Information
PROCESS: BICMOS
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Quad SPDT Audio Switches MAX4740/MAX4740H
Test Circuits/Timing Diagrams (continued)
V CC
MAX4740 MAX4740H
RGEN NC_ OR NO_ GND CB_
VOUT VOUT VOUT CL CB_ OFF ON OFF
VCC COM_
V GEN
VIL TO VIH
CB_
OFF
ON Q = (V OUT )(C L )
OFF
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES THAT HAVE THE OPPOSITE LOGIC SENSE.
Figure 3. Charge injection
VCC 1F NETWORK ANALYZER 0V OR VCC VIN CB_ VCC COM_ OFF-LOSS = 20log NC_ 50 MAX4740 MAX4740H VOUT NO_ GND 50 50 MEAS REF CROSSTALK = 20log 50 50 OFF-ISOLATION = 20log VOUT VIN VOUT VIN VOUT VIN
MEASUREMENTS ARE STANDARDIZED AGAINST SHORT AND OPEN AT SOCKET TERMINALS. OFF-ISOLATION IS MEASURED BETWEEN COM_ AND OFF NO_ OR NC_ TERMINALS. ON-LOSS IS MEASURED BETWEEN COM_ AND ON NO_ OR NC_ TERMINAL ON EACH SWITCH. CROSSTALK IS MEASURED FROM ONE CHANNEL TO THE OTHER CHANNEL. SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
Figure 4. Off-Isolation, On-Loss, and Crosstalk
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Quad SPDT Audio Switches MAX4740/MAX4740H
1F
VCC
COM_ CAPACITANCE ANALYZER f = 1MHz NC_ OR NO_
MAX4740 MAX4740H CB_
VIL OR VIH
GND
Figure 5. Channel Off/On-Capacitance
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Quad SPDT Audio Switches MAX4740/MAX4740H
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) 12, 16L QFN.EPS
PACKAGE OUTLINE, 12,16L QFN, 3x3x0.90 MM
21-0102
G
1 2
10
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Quad SPDT Audio Switches
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
MAX4740/MAX4740H
PACKAGE OUTLINE, 12,16L QFN, 3x3x0.90 MM
21-0102
G
1 2
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Quad SPDT Audio Switches MAX4740/MAX4740H
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
ULTRA THIN QFN.EPS
DETAIL B DETAIL A DETAIL A DETAIL B
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Quad SPDT Audio Switches
Revision History
REVISION NUMBER 0 1 REVISION DATE 5/06 11/07 Initial release Adding ultra-thin QFN package DESCRIPTION PAGES CHANGED -- 1, 2, 3, 10-13
MAX4740/MAX4740H
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 ____________________ 13
(c) 2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.
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