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19-3775; Rev 2; 5/06
Low-RON, Dual-SPST/Single-SPDT Clickless Switches with Negative Rail Capability
General Description
The MAX4901-MAX4905 switches feature negative signal capability that allows signals below ground to pass through without distortion. The MAX4901/MAX4902 are a dual SPST (single-pole/single-throw) and the MAX4903/ MAX4904/MAX4905 are a single SPDT (singlepole/double-throw) configuration. These analog switches operate from a single +1.8V to +5.5V supply and have low 0.6 on-resistance, making them ideal for switching audio signals. The MAX4905 includes a comparator that can be used for headphone detection or mute/send key function. The MAX4902/MAX4904/MAX4905 have internal shunt resistors to automatically discharge any capacitance at the NO_ and NC connection points. This reduces click-andpop sounds that occur when switching audio signals between pre-charged points. A break-before-make feature and auto-discharge also help to reduce popping. These SPST and SPDT switches are available in space-saving 8-pin TDFN and 9-bump UCSPTM packages and operate over the -40C to +85C extended temperature range.
Features
Distortion-Free Signal Throughput Down to VCC - 5.5V Comparator for Headphone or Mute Detection (MAX4905) Clickless Switches with Internal Shunt Resistors (MAX4902/MAX4904/MAX4905) 0.6 (typ) Low On-Resistance (RON) 0.25 On-Resistance Flatness +1.8V to +5.5V Supply Voltage 0.04% THD
MAX4901-MAX4905
Pin Configurations
TOP VIEW BUMPS ON BOTTOM
MAX4901/MAX4902
1 A COM1 B VCC C COM2 NO2 IN2 N.C. GND C N.C. NC N.C. (CMP-) NO1 IN1 B COM N.C. (CMPO) GND 2 3 A VCC NO IN
MAX4903/MAX4904/MAX4905
1 2 3
Applications
Cell Phones PDAs and Handheld Devices Notebook Computers MP3 Players
3 x 3 UCSP
3 x 3 UCSP
( ) MAX4905 ONLY
Pin Configurations continued at end of data sheet. UCSP is a trademark of Maxim Integrated Products, Inc.
Ordering Information/Selector Guide
PART MAX4901EBL-T MAX4901ETA-T MAX4902EBL-T MAX4902ETA-T MAX4903EBL-T MAX4903ETA-T MAX4904EBL-T MAX4904ETA-T MAX4905EBL-T MAX4905ETA-T PIN-PACKAGE 1.5mm x 1.5mm 9 UCSP-9 8 TDFN-8 1.5mm x 1.5mm 9 UCSP-9 8 TDFN-8 1.5mm x 1.5mm 9 UCSP-9 8 TDFN-8 1.5mm x 1.5mm 9 UCSP-9 8 TDFN-8 1.5mm x 1.5mm 9 UCSP-9 8 TDFN-8 TOP MARK AEU AOW AEV AOX AEY AOY AEW AOZ AEX APA CONFIGURATION 2 x SPST 2 x SPST 2 x SPST 2 x SPST 1 x SPDT 1 x SPDT 1 x SPDT 1 x SPDT 1 x SPDT 1 x SPDT COMPARATOR No No No No No No No No Yes Yes SHUNT No No Yes Yes No No Yes Yes Yes Yes PKG CODE B9-1 T833-2 B9-1 T833-2 B9-1 T833-2 B9-1 T833-2 B9-1 T833-2
Note: All devices operate over the -40C to +85C operating temperature range. ________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
Low-RON, Dual-SPST/Single-SPDT Clickless Switches with Negative Rail Capability MAX4901-MAX4905
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.) VCC, IN_, CMP-......................................................-0.3V to +6.0V COM_, NO_, NC ................................(VCC - 6V) to (VCC + 0.3V) CMPO .........................................................-0.3V to (VCC + 0.3V) Open-Switch Continuous Current NO_, NC (MAX4902/MAX4904/MAX4905)...................................30mA Closed-Switch Continuous Current COM_, NO_, NC.....100mA Peak Current COM_, NO_, NC (Pulsed at 1ms, 50% duty cycle)................................200mA Peak Current COM_, NO_, NC (Pulsed at 1ms, 10% duty cycle)................................300mA Continuous Power Dissipation (TA = +70C) 8-Pin TDFN (derate 18.2mW/C above +70C) .........1455mW 9-Bump UCSP (derate 5.2mW/C above +70C).........412mW ESD Method 3015.7 .............................................................2kV Operating Temperature Range ...........................-40C to +85C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C Bump Temperature (soldering) Infrared (15s) ...............................................................+220C Vapor Phase (60s) .......................................................+215C
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 VCC = +3.0V, TA = +25C, unless otherwise noted.) (Note 1)
PARAMETER POWER SUPPLY Power-Supply Range Supply Current ANALOG SWITCH Analog Signal Range VNO_ VNC, (Note 2) VCOM_ RON(NC), RON(NO) VCC = 2.7V, VNC or VNO_ = VCC - 5.5V, -1V, 0, 1V, 2V, VCC; ICOM = 100mA (Notes 3, 4) VCC = 2.7V, INO_ or INC = 100mA or VNO_ (Notes 3, 4, 5) VCC = 2.7V, VNC or VNO_ = VCC - 5.5V, -1V, 0, 1V, 2V, VCC; ICOM = 100mA (Notes 4, 6) TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 0.25 0.01 VCC 5.5 0.6 VCC 1.0 1.2 0.25 0.30 0.5 0.5 V VCC I+ VCC = 5.5V, VIN_ = 0V or VCC MAX4901- MAX4904 MAX4905 1.8 0.001 5 5.5 1 10 V A SYMBOL CONDITIONS MIN TYP MAX UNITS
On-Resistance
On-Resistance Match Between Channels
RON
On-Resistance Flatness
RFLAT
2
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Low-RON, Dual-SPST/Single-SPDT Clickless Switches with Negative Rail Capability
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +2.7V to +5.5V, TA = -40C to +85C, unless otherwise noted. Typical values are at VCC = +3.0V, TA = +25C, unless otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS INO_or INC = 10mA, VCC = 2.7V (MAX4902/MAX4904/ MAX4905) VCC = 2.7V, switch open; VNC or VNO_ = -2.5V, +2.5V; VCOM_ = +2.5V, -2.5V (MAX4901/ MAX4903) (Notes 3, 7) TA = TMIN to TMAX MIN TYP MAX UNITS
MAX4901-MAX4905
Shunt Resistance
RSH
30
50
TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX
-6 -50 -6 -50 -6 -50
+6 nA +50 +6 nA +50 +6 nA +50
NO_, NC Off-Leakage Current
INO_(OFF), INC (OFF)
COM_ Off-Leakage Current
VCC = 2.7V, switch open; VNC or VNO_ = -2.5V, +2.5V; ICOM_(OFF) VCOM_ = -2.5V, +2.5V (MAX4901) (Note 3) VCC = 2.7V, switch closed; VNC or VNO_ = -2.5V, +2.5V, or unconnected; VCOM_ = -2.5V, +2.5V or unconnected (Note 3)
COM_ On-Leakage Current
ICOM_(ON)
DYNAMIC CHARACTERISTICS Turn-On Time tON VCC = 2.7V, VNO = 1.5V, VIN_ = 0V to VCC; VNC = 1.5V, VIN_ = VCC to 0; RL = 50, CL = 5pF (Figure 1) VCC = 2.7V, VNO_ = 1.5V, VIN_ = VCC to 0; VNC = 1.5V, VIN_ = 0 to VCC; RL = 50, CL = 5pF (Figure 1) VCC = 2.7V, VNO_ = 1.5V, VIN_ = VCC to 0; VNC = 1.5V, VIN_ = 0 to VCC; RL = 50, CL = 5pF (Figure 2) TA = +25C TA = TMIN to TMAX 2 1 125 -70 -75 60 27 0.04 pC dB dB dB MHz % 25 100 ns
Turn-Off Time
tOFF
15
100
ns
10 ns
Break-Before-Make Time Delay (MAX4903/MAX4904/MAX4905) Charge Injection Off-Isolation (Note 8) Crosstalk Power-Supply Rejection Ratio On-Channel -3dB Bandwidth Total Harmonic Distortion
tBBM
Q VISO VCT PSRR BW THD
VCOM_ = 0V, RS = 0, CL = 1.0nF (Figure 3) f = 100kHz, VCOM_ = 1VRMS, RL = 50, CL = 5pF (Figure 4) f = 100kHz, VCOM_ = 1VRMS, RL = 50, CL = 5pF (Figure 4) f = 10kHz, VCOM_ = 1VRMS, RL = 50, CL = 5pF Signal = 0dBm, RL = 50, CL = 5pF (Figure 4) f = 20Hz to 20kHz, VCOM = 0.5VP-P, DC bias = 0, RL = 32
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3
Low-RON, Dual-SPST/Single-SPDT Clickless Switches with Negative Rail Capability MAX4901-MAX4905
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +2.7V to +5.5V, TA = -40C to +85C, unless otherwise noted. Typical values are at VCC = +3.0V, TA = +25C, unless otherwise noted.) (Note 1)
PARAMETER NO_, NC Off-Capacitance COM On-Capacitance DIGITAL I/O (IN_) Input Logic-High Voltage Input Logic-Low Voltage Input Leakage Current COMPARATOR (MAX4905) Comparator Threshold Comparator Output-High Voltage Comparator Output-Low Voltage Comparator Input Leakage Comparator Switching Time ISOURCE = 1mA ISINK = 1mA VCMP- = 0 to 2.7V VCC = 2.7V, VCMP- = 0V to VCC, from 50% of VCMP- to 50% of VCMPO -100 1 VCC 0.4V 0.4 +100 2 VCC / 3 V V V nA s VIH VIL IIN VCC = 2.7V to 3.6V VCC = 4.2V to 5.5V VCC = 2.7V to 3.6V VCC = 4.2V to 5.5V VIN_ = 0V or VCC -1 1.4 2.0 0.5 0.8 +1 V V A SYMBOL CNO_(OFF) CNC(OFF) CCOM_(ON) CONDITIONS f = 1MHz, VCOM = 0.5VP-P, DC bias = 0 (Figure 5) f = 1MHz, VCOM = 0.5VP-P, DC bias = 0 (Figure 5) MIN TYP 40 200 MAX UNITS pF pF
Note 1: UCSP and TDFN parts are 100% tested at TA = +25C only, and guaranteed by design over the specified temperature range. 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: Guaranteed by design. Note 4: ICOM for UCSP is 10mA. Note 5: RON = RON(MAX) - RON(MIN). Note 6: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal ranges. Note 7: The MAX4902/MAX4904/MAX4905 have an internal shunt resistor when, in off-state, will determine off-current. Note 8: Off-Isolation = 20log10 (VCOM / VNO), VCOM = output, VNO = input to off switch.
4
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Low-RON, Dual-SPST/Single-SPDT Clickless Switches with Negative Rail Capability MAX4901-MAX4905
Typical Operating Characteristics
(TA = +25C, VCC = 3.0V, unless otherwise noted.)
ON-RESISTANCE vs. COM VOLTAGE
MAX4901 toc01
ON-RESISTANCE vs. COM VOLTAGE
MAX4901 toc02
ON-RESISTANCE vs. COM VOLTAGE
VCC = 3.0V 1.0 ON-RESISTANCE () 0.8 0.6 0.4 0.2 0 TA = +85C TA = +25C TA = -40C
MAX4901 toc03
6 5 ON-RESISTANCE () 4 3 2 1 0 -4 -3 -2 -1 0 1 2 3 4 5 COM VOLTAGE (V) VCC = 2.0V
1.2 VCC = 5.0V 1.0 ON-RESISTANCE () 0.8 0.6 0.4 TA = -40C 0.2 0 -1 0 1 2 3 4 5 COM VOLTAGE (V)
1.2
VCC = 1.8V
TA = +85C TA = +25C
VCC = 2.3V
V+ = 2.5V V+ = 3.0V V+ = 5.0V
-3
-2
-1
0
1
2
3
COM VOLTAGE (V)
SUPPLY CURRENT vs. SUPPLY VOLTAGE (MAX4901-MAX4904)
MAX4901 toc04
SUPPLY CURRENT vs. SUPPLY VOLTAGE (MAX4905)
MAX4901 toc05
TURN-ON/TURN-OFF TIME vs. SUPPLY VOLTAGE
MAX4901 toc06
0.6 0.5 SUPPLY CURRENT (nA) 0.4 0.3 0.2 0.1 0 1.8 2.3 2.8 3.3 3.8 4.3 SUPPLY VOLTAGE (V) 4.8 5.3
6 5 SUPPLY CURRENT (A) 4
70 60 50 tON/tOFF (ns) 40 30 tOFF 20 tON
3 2 1 0 1.8 2.3 2.8 3.3 3.8 4.3 4.8 5.3 SUPPLY VOLTAGE (V)
10 0 1.8 2.3 2.8 3.3 3.8 4.3 4.8 5.3 SUPPLY VOLTAGE (V)
TURN-ON/TURN-OFF TIME vs. TEMPERATURE
VCC = 3.0V 30 tON/tOFF (ns) tON 20
MAX4901 toc07
LOGIC THRESHOLD vs. SUPPLY VOLTAGE
VIN RISING 1.6 LOGIC THRESHOLD (V)
MAX4901 toc08
40
2.0
1.2 VIN FALLING
0.8
10
tOFF
0.4
0 -40 -15 10 35 60 85 TEMPERATURE (C)
0 1.8 2.3 2.8 3.3 3.8 4.3 4.8 5.3 SUPPLY VOLTAGE (V)
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5
Low-RON, Dual-SPST/Single-SPDT Clickless Switches with Negative Rail Capability MAX4901-MAX4905
Typical Operating Characteristics (continued)
(TA = +25C, VCC = 3.0V, unless otherwise noted.)
CHARGE INJECTION vs. VCOM
MAX4901 toc09
ON-/OFF-LEAKAGE CURRENT vs. TEMPERATURE
MAX4901 toc10
FREQUENCY RESPONSE
VCC = 3.0V -3 -6
MAX4905 toc11
300 CL = 1nF 200 CHARGE INJECTION (pC) VCC = 5.0V 100 VCC = 2.0V 0
1000 VCC = 3.0V ICOM(ON) LEAKAGE CURRENT (pA) 100 ICOM(OFF) 10
0
LOSS (dB) 85
-9 -12 -15
-100 1 -3 -2 -1 0 1 VCOM (V) 2 3 4 5 -40 -15 10 35 60 TEMPERATURE (C)
-200
-18 0.001 0.01 0.1 1 10 100 FREQUENCY (MHz)
OFF-ISOLATION AND CROSSTALK vs. FREQUENCY
MAX4901 toc12
TOTAL HARMONIC DISTORTION vs. FREQUENCY
MAX4901 toc13
POWER-SUPPLY REJECTION RATIO vs. FREQUENCY
VCC = 1VRMS DC BIAS = 3V CL = 5pF RL = 50
MAX4901 toc14
0 OFF-ISOLATION AND CROSSTALK (dB) VCC = 3.0V -20 -40 -60 -80 -100 -120 0.001 0.01 0.1 1 10 CROSSTALK OFF-ISOLATION
1 VCC = 3.0V RL = 32
100
80
PSRR (dB) 10 100 1k FREQUENCY (Hz) 10k 100k
THD (%)
60
0.1
40
20
0.01 100 FREQUENCY (MHz)
0 100 1k 10k FREQUENCY (Hz) 100k 1M
COMPARATOR THRESHOLD vs. TEMPERATURE
MAX4901 toc15
COMPARATOR THRESHOLD vs. TEMPERATURE
VCC = 3.0V COMPARATOR THRESHOLD (V) 1.00 VCMP- RISING 0.98
MAX4901 toc16
1.75 VCC = 5.0V COMPARATOR THRESHOLD (V) 1.70 VCMP- RISING 1.65 VCMP- FALLING 1.60
1.02
0.96 VCMP- FALLING 0.94
1.55 -40 -15 10 35 60 85 TEMPERATURE (C)
0.92 -40 -15 10 35 60 85 TEMPERATURE (C)
6
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Low-RON, Dual-SPST/Single-SPDT Clickless Switches with Negative Rail Capability
Pin Description (MAX4901/MAX4902 Dual-SPST Switches)
PIN TDFN 1 2 -- 3 4 5 6 7 8 EP UCSP B1 A1 B2 A2 A3 B3 C3 C2 C1 -- NAME VCC COM1 N.C. NO1 IN1 GND IN2 NO2 COM2 EP FUNCTION Positive Supply-Voltage Input. Bypass VCC to GND with a 0.1F capacitor as close to VCC as possible. Analog Switch 1, Common Terminal No Connection. Leave N.C. unconnected. Analog Switch 1, Normally Open Terminal. NO1 (MAX4902) has a shunt resistor to GND when the switch is in open position. Digital Control Input for Analog Switch 1. A logic high on IN1 connects COM1 to NO1 and a logic low opens the switch. Ground Digital Control Input for Analog Switch 2. A logic high on IN2 connects COM2 to NO2 and a logic low opens the switch. Analog Switch 2, Normally Open Terminal. NO2 has a shunt resistor to GND when the switch is in open position (MAX4902). Analog Switch 2, Common Terminal Exposed Pad. Connect exposed pad to GND.
MAX4901-MAX4905
Pin Description (MAX4903/MAX4904/MAX4905 SPDT Switches)
PIN TDFN 1 2 3 4 5 6 7 8 -- EP UCSP A1 A2 A3 B2 B3 C3 C2 B1 C1 -- NAME VCC NO IN N.C. CMPO GND N.C. CMPNC COM N.C. EP FUNCTION Positive Supply-Voltage Input. Bypass VCC to GND with a 0.1F capacitor as close to VCC as possible. Analog Switch, Normally Open Terminal. NO has a shunt resistor to GND when the switch is in open position (MAX4904/MAX4905). Digital Control Input. Logic low on IN connects COM to NC and logic high connects COM to NO. No Connection. Leave N.C. unconnected (MAX4903/MAX4904). Comparator Output (MAX4905) Ground No Connection. Leave N.C. unconnected (MAX4903/MAX4904). Comparator Input (MAX4905) Analog Switch, Normally Closed Terminal. NC has a shunt resistor to GND when the switch is in open position (MAX4904/MAX4905). Analog Switch, Common Terminal No Connection. Leave N.C. unconnected (MAX4903/MAX4904/MAX4905) Exposed Pad. Connect exposed pad to GND.
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7
Low-RON, Dual-SPST/Single-SPDT Clickless Switches with Negative Rail Capability MAX4901-MAX4905
Typical Operating Circuit
AUDIO SOURCE 1 VCC NC
MAX4905
COM SPEAKER NO AUDIO SOURCE 2 DirectDrive SOURCE CMPO CMPMUTE BUTTON IN VCC 3 VCC
GND
Detailed Description
The MAX4901-MAX4905 are low on-resistance, low-voltage, dual-SPST and single-SPDT analog switches that operate from a +1.8V to +5.5V supply and are fully specified for nominal 3.0V applications. The devices feature a negative signal capability that allows signals below ground to pass through without distortion and have break-before-make switching (MAX4903/ MAX4904/MAX4905). The MAX4905 features a comparator that can be used for headphone or mute detection. The comparator threshold is internally generated to be approximately 1/3 of VCC. The MAX4902/MAX4904/MAX4905 feature an internal shunt resistor to discharge any capacitance at NO_ and NC connection points. This reduces the click-and-pop sounds that occur when switching audio signals.
Analog Signal Levels
The on-resistance of the MAX4901-MAX4905 changes very little for analog input signals across the entire supply-voltage range (see the Typical Operating Characteristics). The switches are bidirectional. The MAX4901-MAX4905 pass signals as low as VCC 5.5V, including signals below ground with minimal distortion. Note that there are shunt resistors on NO_ and NC when they are unconnected to COM_ for the MAX4902/MAX4904/MAX4905.
Comparator (MAX4905)
The MAX4905 includes a comparator that can be used for mute and headphone detection functions. The positive terminal of the comparator is internally set to VCC / 3. When the negative terminal (CMP-) is below the threshold, the comparator output (CMPO) is a logic high. The comparator threshold of VCC / 3 allows for detection of headphones because headphone audio signals are typically biased to VCC / 2.
Applications Information
Digital Control Inputs
The MAX4901-MAX4905 logic inputs accept up to +5.5V, regardless of supply voltage. For example, with a +3.3V supply, IN_ can be driven low to GND and high to +5.5V, allowing for mixing of logic levels in a system. Driving IN_ rail-to-rail minimizes power consumption. For a +1.8V supply voltage, the logic thresholds are 0.5V (low) and 1.4V (high). For a +5V supply voltage, the logic thresholds are 0.8V (low) and 2.0V (high).
8
Shunt Resistor (MAX4902/MAX4904/MAX4905)
The 50 shunt resistors on the MAX4902/MAX4904/ MAX4905 automatically discharge any capacitance at the NC or NO_ terminals when they are unconnected to COM_. This reduces audio click-and-pop sounds that occur when switching between audio sources.
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Low-RON, Dual-SPST/Single-SPDT Clickless Switches with Negative Rail Capability
Audible clicks and pops are caused when a step DC voltage is switched into the speaker. By automatically discharging the side that is not connected, any residual DC voltage is removed, thereby reducing the clicks and pops.
UCSP Applications Information
For the latest application details on UCSP construction, dimensions, tape carrier information, PC board techniques, bump-pad layout, and recommended reflow temperature profile, as well as the latest information on reliability testing results, refer to the Application Note: UCSP--A Water-Level Chip-Scale Package on Maxim's web site at www.maxim-ic.com/ucsp.
MAX4901-MAX4905
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 the device. Proper power-supply sequencing is recommended for all CMOS devices. Always apply VCC before applying analog signals, especially if the analog signal is not current-limited.
Pin Configurations/Functional Diagrams/Truth Tables
TOP VIEW
NOTE: N.C. IS NO CONNECTION (SEE PIN DESCRIPTION TABLE)
MAX4901/MAX4902
MAX4903/MAX4904
8 7 6
MAX4905
8 7 6 5
VCC
COM1 NO1 IN1
1 2 3 4
COM2 NO2 IN2
VCC
NO IN N.C.
1 2 3 4
COM NC N.C. GND
VCC
NO IN CMPO
1 2 3 4
8 7
COM NC
6 CMP-
5 GND
*EP
*EP
*EP
+
VCC/3
5 GND
TDFN
*EXPOSED PAD CONNECTED TO GND
TDFN
*EXPOSED PAD CONNECTED TO GND *EXPOSED PAD CONNECTED TO GND MAX4904/ MAX4905 NCS* OFF ON NOS* ON OFF
MAX4901-MAX4905 IN 0 1 NC ON OFF NO OFF ON
*NCS AND NOS REFER TO NORMALLY CLOSED SHUNT REGISTER
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9
Low-RON, Dual-SPST/Single-SPDT Clickless Switches with Negative Rail Capability MAX4901-MAX4905
Test Circuits/Timing Diagrams
MAX4901-MAX4905
VCC V CC COM_ LOGIC INPUT VOUT RL IN_ LOGIC INPUT GND SWITCH OUTPUT 0V t ON CL VOUT 0.9 x V0UT t OFF 0.9 x VOUT VCC 50% 0V t r < 5ns t f < 5ns
NC OR NO_
CL INCLUDES FIXTURE AND STRAY CAPACITANCE. RL VOUT = VNC OR VNO_ RL + RON
(
)
IN DEPENDS ON SWITCH CONFIGURATION; INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
Figure 1. Switching Time
MAX4901-MAX4905
V CC V CC LOGIC INPUT COM_ RL IN_ VOUT
VCC 50% 0V
NO_ OR NC
CL
LOGIC INPUT
GND VOUT tBBM CL INCLUDES FIXTURE AND STRAY CAPACITANCE. 0.9 x VOUT
Figure 2. Break-Before-Make Interval
V CC
MAX4901-MAX4905
VCC RGEN NC OR NO_ GND IN_ OFF ON Q = (V OUT )(C L ) COM_ CL VOUT VOUT IN OFF ON
VOUT
OFF
V GEN
VIL TO VIH
IN
OFF
LOGIC-INPUT WAVEFORMS INVERTED FOR SWITCHES THAT HAVE THE OPPOSITE LOGIC SENSE.
Figure 3. Charge Injection
10
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Low-RON, Dual-SPST/Single-SPDT Clickless Switches with Negative Rail Capability
Test Circuits/Timing Diagrams (continued)
MAX4901-MAX4905
+5V 10nF OFF-ISOLATION = 20log NETWORK ANALYZER VCC 0V OR VCC IN_ COM1 VIN 50 50 LOSS = 20log
VOUT VIN VOUT VIN VOUT VIN
MAX4901-MAX4905
NC1 50 GND NO1* VOUT MEAS REF 50
CROSSTALK = 20log
50
MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS. OFF-ISOLATION IS MEASURED BETWEEN COM_ AND "OFF" NO_ OR NC TERMINAL ON EACH SWITCH. -3dB BANDWIDTH 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.
*FOR CROSSTALK THIS PIN IS NO2. NC2 AND COM2 ARE OPEN.
Figure 4. -3dB Bandwidth, Off-Isolation, and Crosstalk
10nF
V CC
Chip Information
PROCESS: BiCMOS
VCC COM_
MAX4901- MAX4905
IN VIL OR VIH
CAPACITANCE METER f = 1MHz
NC_ or NO_ GND
Figure 5. Channel Off-/On-Capacitance
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11
Low-RON, Dual-SPST/Single-SPDT Clickless Switches with Negative Rail Capability MAX4901-MAX4905
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.)
9LUCSP, 3x3.EPS
PACKAGE OUTLINE, 3x3 UCSP
21-0093
K
1
1
12
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Low-RON, Dual-SPST/Single-SPDT Clickless Switches with Negative Rail Capability
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.)
6, 8, &10L, DFN THIN.EPS
MAX4901-MAX4905
PACKAGE OUTLINE, 6,8,10 & 14L, TDFN, EXPOSED PAD, 3x3x0.80 mm
21-0137
H
1
2
COMMON DIMENSIONS SYMBOL A D E A1 L k A2 MIN. 0.70 2.90 2.90 0.00 0.20 MAX. 0.80 3.10 3.10 0.05 0.40
PACKAGE VARIATIONS PKG. CODE T633-1 T633-2 T833-1 T833-2 T833-3 T1033-1 T1033-2 T1433-1 T1433-2 N 6 6 8 8 8 10 10 14 14 D2 1.500.10 1.500.10 1.500.10 1.500.10 1.500.10 1.500.10 1.500.10 1.700.10 1.700.10 E2 2.300.10 2.300.10 2.300.10 2.300.10 2.300.10 2.300.10 2.300.10 2.300.10 2.300.10 e 0.95 BSC 0.95 BSC 0.65 BSC 0.65 BSC 0.65 BSC 0.50 BSC 0.50 BSC 0.40 BSC 0.40 BSC JEDEC SPEC MO229 / WEEA MO229 / WEEA MO229 / WEEC MO229 / WEEC MO229 / WEEC MO229 / WEED-3 MO229 / WEED-3 ------b 0.400.05 0.400.05 0.300.05 0.300.05 0.300.05 0.250.05 0.250.05 0.200.05 0.200.05 [(N/2)-1] x e 1.90 REF 1.90 REF 1.95 REF 1.95 REF 1.95 REF 2.00 REF 2.00 REF 2.40 REF 2.40 REF
0.25 MIN. 0.20 REF.
PACKAGE OUTLINE, 6,8,10 & 14L, TDFN, EXPOSED PAD, 3x3x0.80 mm
-DRAWING NOT TO SCALE-
21-0137
H
2
2
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) 2006 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.

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