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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 _______________________________________________________________________________________ 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 _______________________________________________________________________________________ 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 _______________________________________________________________________________________ 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) _______________________________________________________________________________________ 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 _______________________________________________________________________________________ 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. _______________________________________________________________________________________ 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. _______________________________________________________________________________________ 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 _______________________________________________________________________________________ 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 ______________________________________________________________________________________ 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 ______________________________________________________________________________________ 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 ______________________________________________________________________________________ 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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