19-3775; Rev 2; 5/06 Low-RON, Dual-SPST/Single-SPDT Clickless Switches with Negative Rail Capability 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 0.6Ω 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 UCSP™ packages and operate over the -40°C to +85°C 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) ♦ 0.6Ω (typ) Low On-Resistance (RON) ♦ 0.25Ω On-Resistance Flatness ♦ +1.8V to +5.5V Supply Voltage ♦ 0.04% THD Pin Configurations TOP VIEW BUMPS ON BOTTOM Notebook Computers PDAs and Handheld Devices MP3 Players 2 3 COM1 NO1 IN1 1 2 3 VCC NO IN COM N.C. (CMPO) GND N.C. NC A A Applications Cell Phones MAX4903/MAX4904/MAX4905 MAX4901/MAX4902 1 B B VCC N.C. GND C C COM2 NO2 IN2 N.C. (CMP-) 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 PIN-PACKAGE TOP MARK CONFIGURATION COMPARATOR SHUNT PKG CODE MAX4901EBL-T 1.5mm x 1.5mm 9 UCSP-9 AEU 2 x SPST No No B9-1 MAX4901ETA-T 8 TDFN-8 AOW 2 x SPST No No T833-2 MAX4902EBL-T 1.5mm x 1.5mm 9 UCSP-9 AEV 2 x SPST No Yes B9-1 T833-2 MAX4902ETA-T 8 TDFN-8 AOX 2 x SPST No Yes MAX4903EBL-T 1.5mm x 1.5mm 9 UCSP-9 AEY 1 x SPDT No No B9-1 MAX4903ETA-T 8 TDFN-8 AOY 1 x SPDT No No T833-2 MAX4904EBL-T 1.5mm x 1.5mm 9 UCSP-9 AEW 1 x SPDT No Yes B9-1 MAX4904ETA-T 8 TDFN-8 AOZ 1 x SPDT No Yes T833-2 MAX4905EBL-T 1.5mm x 1.5mm 9 UCSP-9 AEX 1 x SPDT Yes Yes B9-1 MAX4905ETA-T 8 TDFN-8 APA 1 x SPDT Yes Yes T833-2 Note: All devices operate over the -40°C to +85°C operating temperature range. ________________________________________________________________ Maxim Integrated Products 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. 1 MAX4901–MAX4905 General Description MAX4901–MAX4905 Low-RON, Dual-SPST/Single-SPDT Clickless Switches with Negative Rail Capability 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 = +70°C) 8-Pin TDFN (derate 18.2mW/°C above +70°C) .........1455mW 9-Bump UCSP (derate 5.2mW/°C above +70°C).........412mW ESD Method 3015.7 .............................................................±2kV Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C Bump Temperature (soldering) Infrared (15s) ...............................................................+220°C Vapor Phase (60s) .......................................................+215°C 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 = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = +3.0V, TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 5.5 V POWER SUPPLY Power-Supply Range Supply Current VCC I+ 1.8 VCC = 5.5V, VIN_ = 0V or VCC MAX4901– MAX4904 0.001 1 MAX4905 5 10 µA ANALOG SWITCH Analog Signal Range On-Resistance On-Resistance Match Between Channels On-Resistance Flatness 2 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) ∆RON VCC = 2.7V, INO_ or INC = 100mA or VNO_ (Notes 3, 4, 5) RFLAT VCC = 2.7V, VNC or VNO_ = VCC - 5.5V, -1V, 0, 1V, 2V, VCC; ICOM = 100mA (Notes 4, 6) VCC 5.5 TA = +25°C VCC 0.6 TA = TMIN to TMAX TA = +25°C TA = TMIN to TMAX TA = +25°C 1.0 1.2 0.01 TA = TMIN to TMAX _______________________________________________________________________________________ Ω 0.25 0.30 0.25 V Ω 0.5 0.5 Ω Low-RON, Dual-SPST/Single-SPDT Clickless Switches with Negative Rail Capability (VCC = +2.7V to +5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = +3.0V, TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER Shunt Resistance SYMBOL RSH NO_, NC Off-Leakage Current COM_ Off-Leakage Current COM_ On-Leakage Current INO_(OFF), INC (OFF) 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) VCC = 2.7V, switch open; VNC or VNO_ = -2.5V, +2.5V; ICOM_(OFF) VCOM_ = -2.5V, +2.5V (MAX4901) (Note 3) ICOM_(ON) VCC = 2.7V, switch closed; VNC or VNO_ = -2.5V, +2.5V, or unconnected; VCOM_ = -2.5V, +2.5V or unconnected (Note 3) MIN TA = TMIN to TMAX TYP MAX UNITS 30 50 Ω TA = +25°C -6 +6 TA = TMIN to TMAX -50 +50 TA = +25°C -6 +6 TA = TMIN to TMAX -50 +50 TA = +25°C -6 +6 TA = TMIN to TMAX -50 +50 nA nA nA DYNAMIC CHARACTERISTICS Turn-On Time Turn-Off Time Break-Before-Make Time Delay (MAX4903/MAX4904/MAX4905) Charge Injection tON VCC = 2.7V, VNO = 1.5V, VIN_ = 0V to VCC; VNC = 1.5V, VIN_ = VCC to 0; RL = 50Ω, CL = 5pF (Figure 1) 25 100 ns tOFF VCC = 2.7V, VNO_ = 1.5V, VIN_ = VCC to 0; VNC = 1.5V, VIN_ = 0 to VCC; RL = 50Ω, CL = 5pF (Figure 1) 15 100 ns tBBM VCC = 2.7V, VNO_ = 1.5V, VIN_ = VCC to 0; VNC = 1.5V, VIN_ = 0 to VCC; RL = 50Ω, CL = 5pF (Figure 2) Q TA = +25°C 2 TA = TMIN to TMAX 1 10 ns VCOM_ = 0V, RS = 0Ω, CL = 1.0nF (Figure 3) 125 pC -70 dB Off-Isolation (Note 8) VISO f = 100kHz, VCOM_ = 1VRMS, RL = 50Ω, CL = 5pF (Figure 4) Crosstalk VCT f = 100kHz, VCOM_ = 1VRMS, RL = 50Ω, CL = 5pF (Figure 4) -75 dB f = 10kHz, VCOM_ = 1VRMS, RL = 50Ω, CL = 5pF 60 dB 27 MHz 0.04 % Power-Supply Rejection Ratio PSRR On-Channel -3dB Bandwidth BW Signal = 0dBm, RL = 50Ω, CL = 5pF (Figure 4) Total Harmonic Distortion THD f = 20Hz to 20kHz, VCOM = 0.5VP-P, DC bias = 0, RL = 32Ω _______________________________________________________________________________________ 3 MAX4901–MAX4905 ELECTRICAL CHARACTERISTICS (continued) MAX4901–MAX4905 Low-RON, Dual-SPST/Single-SPDT Clickless Switches with Negative Rail Capability ELECTRICAL CHARACTERISTICS (continued) (VCC = +2.7V to +5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = +3.0V, TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS NO_, NC Off-Capacitance CNO_(OFF) CNC(OFF) f = 1MHz, VCOM = 0.5VP-P, DC bias = 0 (Figure 5) 40 pF COM On-Capacitance CCOM_(ON) f = 1MHz, VCOM = 0.5VP-P, DC bias = 0 (Figure 5) 200 pF DIGITAL I/O (IN_) Input Logic-High Voltage VIH Input Logic-Low Voltage VIL Input Leakage Current IIN VCC = 2.7V to 3.6V 1.4 VCC = 4.2V to 5.5V 2.0 V VCC = 2.7V to 3.6V 0.5 VCC = 4.2V to 5.5V 0.8 VIN_ = 0V or VCC -1 +1 V µA COMPARATOR (MAX4905) Comparator Threshold VCC / 3 Comparator Output-High Voltage ISOURCE = 1mA Comparator Output-Low Voltage ISINK = 1mA Comparator Input Leakage VCMP- = 0 to 2.7V Comparator Switching Time VCC = 2.7V, VCMP- = 0V to VCC, from 50% of VCMP- to 50% of VCMPO V VCC 0.4V V -100 1 0.4 V +100 nA 2 µs Note 1: UCSP and TDFN parts are 100% tested at TA = +25°C 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 _______________________________________________________________________________________ Low-RON, Dual-SPST/Single-SPDT Clickless Switches with Negative Rail Capability ON-RESISTANCE vs. COM VOLTAGE VCC = 2.0V 3 VCC = 2.3V 2 V+ = 2.5V V+ = 3.0V V+ = 5.0V 1 TA = +85°C 0.6 TA = +25°C 0.4 0.2 -3 -2 -1 0 1 2 3 5 4 TA = +25°C 0.6 TA = -40°C 0.4 0.2 0 -4 TA = +85°C 0.8 TA = -40°C 0 0 -1 0 1 2 3 5 4 -3 -2 -1 0 1 COM VOLTAGE (V) COM VOLTAGE (V) SUPPLY CURRENT vs. SUPPLY VOLTAGE (MAX4901–MAX4904) SUPPLY CURRENT vs. SUPPLY VOLTAGE (MAX4905) TURN-ON/TURN-OFF TIME vs. SUPPLY VOLTAGE 0.2 0.1 50 4 3 2.8 3.3 3.8 4.3 SUPPLY VOLTAGE (V) 10 4.8 5.3 0 1.8 2.3 2.8 3.3 3.8 4.3 4.8 5.3 1.8 2.3 2.8 SUPPLY VOLTAGE (V) VCC = 3.0V 4.3 4.8 5.3 LOGIC THRESHOLD vs. SUPPLY VOLTAGE VIN RISING 1.6 LOGIC THRESHOLD (V) 30 tON 20 tOFF 10 3.8 2.0 MAX4901 toc07 40 3.3 SUPPLY VOLTAGE (V) TURN-ON/TURN-OFF TIME vs. TEMPERATURE tON/tOFF (ns) 2.3 tOFF 20 0 1.8 tON 30 2 1 0 40 MAX4901 toc08 0.3 60 tON/tOFF (ns) 0.4 MAX4901 toc06 5 SUPPLY CURRENT (µA) 0.5 70 MAX4901 toc05 MAX4901 toc04 6 3 2 COM VOLTAGE (V) 0.6 SUPPLY CURRENT (nA) 0.8 VCC = 3.0V 1.0 ON-RESISTANCE (Ω) 4 1.2 MAX4901 toc02 MAX4901 toc01 VCC = 1.8V VCC = 5.0V 1.0 ON-RESISTANCE (Ω) ON-RESISTANCE (Ω) 5 ON-RESISTANCE vs. COM VOLTAGE 1.2 MAX4901 toc03 ON-RESISTANCE vs. COM VOLTAGE 6 1.2 VIN FALLING 0.8 0.4 0 0 -40 -15 10 35 TEMPERATURE (°C) 60 85 1.8 2.3 2.8 3.3 3.8 4.3 4.8 5.3 SUPPLY VOLTAGE (V) _______________________________________________________________________________________ 5 MAX4901–MAX4905 Typical Operating Characteristics (TA = +25°C, VCC = 3.0V, unless otherwise noted.) Typical Operating Characteristics (continued) (TA = +25°C, VCC = 3.0V, unless otherwise noted.) ON-/OFF-LEAKAGE CURRENT vs. TEMPERATURE VCC = 3.0V ICOM(ON) VCC = 5.0V 100 VCC = 2.0V 0 VCC = 3.0V -3 100 -6 LOSS (dB) LEAKAGE CURRENT (pA) 200 FREQUENCY RESPONSE 0 MAX4901 toc10 CL = 1nF ICOM(OFF) 10 -12 -100 -15 1 -200 -2 -1 0 1 2 3 4 -15 10 35 85 60 0.001 0.01 0.1 1 10 VCOM (V) TEMPERATURE (°C) FREQUENCY (MHz) OFF-ISOLATION AND CROSSTALK vs. FREQUENCY TOTAL HARMONIC DISTORTION vs. FREQUENCY POWER-SUPPLY REJECTION RATIO vs. FREQUENCY 1 MAX4901 toc12 0 VCC = 3.0V -20 -40 -18 -40 5 100 MAX4901 toc13 -3 VCC = 3.0V RL = 32Ω VCC = 1VRMS DC BIAS = 3V CL = 5pF RL = 50Ω 80 100 -60 PSRR (dB) THD (%) OFF-ISOLATION 0.1 CROSSTALK -80 60 40 20 -100 0.01 -120 0.01 0.1 1 10 0 100 10 100 10k 1k 100k 1k COMPARATOR THRESHOLD vs. TEMPERATURE VCC = 5.0V 1.70 VCMP- RISING 1.65 VCMP- FALLING 1.60 1.02 VCC = 3.0V COMPARATOR THRESHOLD (V) MAX4901 toc15 1.75 10k FREQUENCY (Hz) COMPARATOR THRESHOLD vs. TEMPERATURE COMPARATOR THRESHOLD (V) 100 FREQUENCY (Hz) FREQUENCY (MHz) MAX4901 toc16 0.001 1.00 VCMP- RISING 0.98 0.96 VCMP- FALLING 0.94 0.92 1.55 -40 -15 10 35 TEMPERATURE (°C) 6 -9 MAX4901 toc14 CHARGE INJECTION (pC) 1000 MAX4901 toc09 300 MAX4905 toc11 CHARGE INJECTION vs. VCOM OFF-ISOLATION AND CROSSTALK (dB) MAX4901–MAX4905 Low-RON, Dual-SPST/Single-SPDT Clickless Switches with Negative Rail Capability 60 85 -40 -15 10 35 60 TEMPERATURE (°C) _______________________________________________________________________________________ 85 100k 1M Low-RON, Dual-SPST/Single-SPDT Clickless Switches with Negative Rail Capability PIN NAME TDFN UCSP 1 B1 VCC FUNCTION Positive Supply-Voltage Input. Bypass VCC to GND with a 0.1µF capacitor as close to VCC as possible. 2 A1 COM1 — B2 N.C. No Connection. Leave N.C. unconnected. Analog Switch 1, Common Terminal 3 A2 NO1 Analog Switch 1, Normally Open Terminal. NO1 (MAX4902) has a shunt resistor to GND when the switch is in open position. 4 A3 IN1 Digital Control Input for Analog Switch 1. A logic high on IN1 connects COM1 to NO1 and a logic low opens the switch. 5 B3 GND Ground 6 C3 IN2 Digital Control Input for Analog Switch 2. A logic high on IN2 connects COM2 to NO2 and a logic low opens the switch. 7 C2 NO2 Analog Switch 2, Normally Open Terminal. NO2 has a shunt resistor to GND when the switch is in open position (MAX4902). 8 C1 COM2 EP — EP Analog Switch 2, Common Terminal Exposed Pad. Connect exposed pad to GND. Pin Description (MAX4903/MAX4904/MAX4905 SPDT Switches) PIN NAME FUNCTION TDFN UCSP 1 A1 VCC Positive Supply-Voltage Input. Bypass VCC to GND with a 0.1µF capacitor as close to VCC as possible. 2 A2 NO Analog Switch, Normally Open Terminal. NO has a shunt resistor to GND when the switch is in open position (MAX4904/MAX4905). 3 A3 IN Digital Control Input. Logic low on IN connects COM to NC and logic high connects COM to NO. 4 B2 5 B3 6 C3 7 C2 NC N.C. CMPO No Connection. Leave N.C. unconnected (MAX4903/MAX4904). Comparator Output (MAX4905) GND Ground N.C. No Connection. Leave N.C. unconnected (MAX4903/MAX4904). CMP- Comparator Input (MAX4905) Analog Switch, Normally Closed Terminal. NC has a shunt resistor to GND when the switch is in open position (MAX4904/MAX4905). 8 B1 COM Analog Switch, Common Terminal — C1 N.C. No Connection. Leave N.C. unconnected (MAX4903/MAX4904/MAX4905) EP — EP Exposed Pad. Connect exposed pad to GND. _______________________________________________________________________________________ 7 MAX4901–MAX4905 Pin Description (MAX4901/MAX4902 Dual-SPST Switches) 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 IN AUDIO SOURCE 2 VCC 3 VCC DirectDrive SOURCE CMPO CMP- 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. 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 MUTE BUTTON 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. Shunt Resistor (MAX4902/MAX4904/MAX4905) The 50Ω 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. _______________________________________________________________________________________ Low-RON, Dual-SPST/Single-SPDT Clickless Switches with Negative Rail Capability 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. 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. Pin Configurations/Functional Diagrams/Truth Tables TOP VIEW NOTE: N.C. IS NO CONNECTION (SEE PIN DESCRIPTION TABLE) MAX4903/MAX4904 MAX4901/MAX4902 VCC 1 8 COM2 COM1 2 7 NO1 3 6 IN1 4 5 GND MAX4905 VCC 1 8 COM NC NO 2 7 NC 6 N.C. IN 3 6 CMP- 5 GND CMPO 4 VCC 1 8 COM NO2 NO 2 7 IN2 IN 3 N.C. 4 *EP *EP TDFN TDFN *EXPOSED PAD CONNECTED TO GND *EXPOSED PAD CONNECTED TO GND MAX4901–MAX4905 *EP + VCC/3 5 GND *EXPOSED PAD CONNECTED TO GND MAX4904/ MAX4905 IN NC NO NCS* NOS* 0 ON OFF OFF ON 1 OFF ON ON OFF *NCS AND NOS REFER TO NORMALLY CLOSED SHUNT REGISTER _______________________________________________________________________________________ 9 MAX4901–MAX4905 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. MAX4901–MAX4905 Low-RON, Dual-SPST/Single-SPDT Clickless Switches with Negative Rail Capability Test Circuits/Timing Diagrams MAX4901–MAX4905 VCC LOGIC INPUT V CC COM_ NC OR NO_ 50% 0V VOUT RL t OFF CL IN_ VOUT GND LOGIC INPUT SWITCH OUTPUT 0.9 x V0UT 0.9 x VOUT 0V t ON CL INCLUDES FIXTURE AND STRAY CAPACITANCE. RL VOUT = VNC OR VNO_ RL + RON ( t r < 5ns t f < 5ns VCC IN DEPENDS ON SWITCH CONFIGURATION; INPUT POLARITY DETERMINED BY SENSE OF SWITCH. ) Figure 1. Switching Time V CC MAX4901–MAX4905 LOGIC INPUT V CC VCC 50% 0V NO_ OR NC VOUT COM_ RL CL IN_ LOGIC INPUT GND 0.9 x VOUT VOUT tBBM CL INCLUDES FIXTURE AND STRAY CAPACITANCE. Figure 2. Break-Before-Make Interval V CC ∆VOUT MAX4901–MAX4905 VCC RGEN V GEN VOUT COM_ NC OR NO_ VOUT IN OFF CL GND ON OFF IN_ VIL TO VIH IN OFF ON OFF Q = (∆V OUT )(C L ) LOGIC-INPUT WAVEFORMS INVERTED FOR SWITCHES THAT HAVE THE OPPOSITE LOGIC SENSE. Figure 3. Charge Injection 10 ______________________________________________________________________________________ Low-RON, Dual-SPST/Single-SPDT Clickless Switches with Negative Rail Capability +5V 10nF OFF-ISOLATION = 20log VOUT VIN LOSS = 20log VOUT VIN CROSSTALK = 20log VOUT VIN NETWORK ANALYZER VCC 0V OR VCC VIN COM1 IN_ 50Ω 50Ω MAX4901–MAX4905 VOUT NO1* NC1 GND 50Ω MEAS REF 50Ω 50Ω 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 Chip Information V CC PROCESS: BiCMOS VCC COM_ MAX4901– MAX4905 IN CAPACITANCE METER f = 1MHz VIL OR VIH NC_ or NO_ GND Figure 5. Channel Off-/On-Capacitance ______________________________________________________________________________________ 11 MAX4901–MAX4905 Test Circuits/Timing Diagrams (continued) 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 MAX4901–MAX4905 Low-RON, Dual-SPST/Single-SPDT Clickless Switches with Negative Rail Capability PACKAGE OUTLINE, 3x3 UCSP 21-0093 12 ______________________________________________________________________________________ K 1 1 Low-RON, Dual-SPST/Single-SPDT Clickless Switches with Negative Rail Capability 6, 8, &10L, DFN THIN.EPS PACKAGE OUTLINE, 6,8,10 & 14L, TDFN, EXPOSED PAD, 3x3x0.80 mm 21-0137 COMMON DIMENSIONS MIN. MAX. PKG. CODE N D2 E2 e JEDEC SPEC b A 0.70 0.80 T633-1 6 1.50±0.10 2.30±0.10 0.95 BSC MO229 / WEEA 0.40±0.05 1.90 REF D 2.90 3.10 T633-2 6 1.50±0.10 2.30±0.10 0.95 BSC MO229 / WEEA 0.40±0.05 1.90 REF E 2.90 3.10 T833-1 8 1.50±0.10 2.30±0.10 0.65 BSC MO229 / WEEC 0.30±0.05 1.95 REF 0.00 0.05 T833-2 8 1.50±0.10 2.30±0.10 0.65 BSC MO229 / WEEC 0.30±0.05 1.95 REF L 0.20 0.40 T833-3 8 1.50±0.10 2.30±0.10 0.65 BSC MO229 / WEEC 0.30±0.05 1.95 REF T1033-1 10 1.50±0.10 2.30±0.10 0.50 BSC MO229 / WEED-3 0.25±0.05 2.00 REF A2 0.20 REF. 2 [(N/2)-1] x e A1 0.25 MIN. 1 PACKAGE VARIATIONS SYMBOL k H T1033-2 10 1.50±0.10 2.30±0.10 0.50 BSC MO229 / WEED-3 0.25±0.05 2.00 REF T1433-1 14 1.70±0.10 2.30±0.10 0.40 BSC ---- 0.20±0.05 2.40 REF T1433-2 14 1.70±0.10 2.30±0.10 0.40 BSC ---- 0.20±0.05 2.40 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 © 2006 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc. MAX4901–MAX4905 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.)