19-4150; Rev 1; 6/09 Low RON, Dual-SPDT/Single-DPDT Analog Switches with Slow Turn-On Time Features The MAX4991–MAX4994 low on-resistance analog switches operate from a single +1.8V to +5.5V supply. The MAX4991/MAX4993 feature a slow turn-on time to reduce clicks and pops due to coupling capacitors and audio amplifiers with a DC output bias. This feature provides click-and-pop reduction without adding additional parts for existing architectures. ♦ Slow Turn-On for Click-and-Pop Reduction Without Additional Parts Pin Configurations TOP VIEW 8 COM2 9 NO2 10 7 6 MAX4991/ MAX4992 1 2 Cellular Phones UTQFN COM2 9 NO2 10 Typical Application Circuit appears at end of data sheet. GND 8 7 6 MAX4993/ MAX4994 1 2 NO1 EN NC2 Audio Signal Routing VCC Portable MP3 Players 5 NC1 4 CB1 3 COM1 5 NC1 4 CB 3 COM1 NO1 Speaker Headset Source Switching VCC Applications CB2 GND The MAX4991–MAX4994 are available in space-saving 10-pin UTQFN (1.4mm x 1.8mm) package, and are specified for operation over the -40°C to +85°C extended temperature range. ♦ 1.2µA (typ) Supply Current ♦ Space-Saving Packages 10-Pin UTQFN (1.4mm x 1.8mm x 0.55mm) NC2 The MAX4991/MAX4992 are dual single-pole/doublethrow (SPDT) switches, while the MAX4993/MAX4994 are double-pole/double-throw (DPDT) switches. The MAX4993/MAX4994 feature an active-low enable input (EN) that sets all the channels to high impedance and reduces supply current when driven high. These devices have 0.3Ω on-resistance and 0.004% THD+N to route high fidelity audio signals. ♦ Low 0.3Ω On-Resistance ♦ Low RON Flatness (1mΩ) ♦ Low THD+N: 0.004% ♦ +1.8V to +5.5V Single-Supply Operation UTQFN Ordering Information/Selector Guide PART PIN-PACKAGE CONFIGURATION SLOW-SWITCHING TIME ENABLE LINE TOP MARK MAX4991EVB+* 10 UTQFN Dual SPDT Yes No AAD MAX4992EVB+ 10 UTQFN Dual SPDT No No AAE MAX4993EVB+ 10 UTQFN DPDT Yes Yes AAF MAX4994EVB+* 10 UTQFN DPDT No Yes AAG Note: All devices operate over -40°C to +85°C extended temperature range. +Denotes a lead(Pb)-free/RoHS-compliant package. *Future product—contact factory for availability. ________________________________________________________________ Maxim Integrated Products 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. 1 MAX4991–MAX4994 General Description MAX4991–MAX4994 Low RON, Dual-SPDT/Single-DPDT Analog Switches with Slow Turn-On Time ABSOLUTE MAXIMUM RATINGS (Voltages referenced to GND.) VCC, CB_, EN ........................................................-0.3V to +6.0V COM_, NC_, NO_ ...................................... -0.3V to (VCC + 0.3V) Continuous Current COM_, NC_, NO_ ...........................±350mA Peak Current COM_, NC_, NO_ (pulsed at 1ms, 50% duty cycle)..........................................................±700mA Peak Current COM_, NC_, NO_ (pulsed at 1ms, 10% duty cycle)..............................................................±1.5A Continuous Power Dissipation (TA = +70°C) 10-Pin UTQFN (derate 6.9mW/°C above +70°C).........559mW Junction-to-Case Thermal Resistance (θJC) (Note 1) 10-Pin UTQFN ...........................................................20.1°C/W Junction-to-Ambient Thermal Resistance (θJA) (Note 1) 10-Pin UTQFN .........................................................143.1°C/W Operating Temperature Range ...........................-40°C to +85°C Junction Temperature Range ..........................................+150°C Storage Temperature Range ............................ -65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a 4-layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial. 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.) (Note 2) PARAMETER Power-Supply Range Undervoltage Lockout Supply Current (MAX4991/MAX4992) SYMBOL CONDITIONS VUVLO ICC VCB1 = VCB2 = +0.5V or +1.4V VEN = 0V, VCB = 0V or VCC VEN = VCB = +0.5V or +1.4V Power-Supply Rejection Ratio Analog Signal Range On-Resistance PSRR UNITS 5.5 V V VCC = +3V 1.2 2.5 VCC = +5.5V 3.1 6 VCC = +2.7V 3 VCC = +5.5V 14 VCC = +5.5V 0.1 1 VCC = +3V 1.2 2.5 VCC = +5.5V 3.1 6 VCC = +2.7V 3 VCC = +5.5V 8.5 RL = RS = 50, f = 20kHz 80 VNC_, VNO_, VCOM_ R ON MAX 1.4 VCB1 = VCB2 = 0V or VCC ICC TYP 1.8 VEN = VCC, VCB = 0V or VCC Supply Current (MAX4993/MAX4994) MIN VCC 0 VCC = +2.7V, VNC_ or VNO_ = 0 TA = +25°C to VCC, ICOM_ = 100mA TA = TMIN to TMAX μA dB VCC 0.3 μA 0.5 0.6 V On-Resistance Match Between Channels RON VCC = +2.7V, between NC_, NO_ only, ICOM_ = 100mA, VNC_ or VNO_ = VCC/2 3 m On-Resistance Flatness RFLAT VCC = +2.7V, VNC_ or VNO_ = 0 to VCC, ICOM_ = 100mA (Note 3) 1 m COM_ Output Noise NCOM_ VNC_ = VNO_ = 0V, RL = 50 2 f = 20Hz to 20kHz 1 f = 0Hz to 1MHz 50 _______________________________________________________________________________________ μVRMS Low RON, Dual-SPDT/Single-DPDT Analog Switches with Slow Turn-On Time (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.) (Note 2) PARAMETER SYMBOL NC_, NO_, Off-Leakage Current IL(OFF) CONDITIONS MIN TYP MAX UNITS VCC = +2.7V, switch open, VNC_ or VNO_ = 0V or VCC, VCOM_ = VCC or 0V -100 +100 nA -100 +100 nA 60 140 nA 360 630 ms VCC = +2.7V, VNC_ or VNO_ = +1.5V, RL = 50, CL = 35pF (MAX4992/MAX4994) 20 150 μs 2 μs COM_ Off-Leakage Current (MAX4993/MAX4994) ICOM_L(OFF) VCC = +2.7V, VEN = VCC, VNC_ or VNO_ = 0V or VCC, VCOM_ = VCC or 0V COM_ On-Leakage Current ICOM_L(ON) VCC = +2.7V, switch closed, VNC_ or VNO_ = 0V, VCC or unconnected, VCOM_ = 0V, VCC, or unconnected DYNAMIC Turn-On Time (Note 4) (Figure 1) t ON VCC = +2.7V, VNC_ or VNO_ = +1.5V, RL = 50, CL = 35pF (MAX4991/MAX4993) 120 Turn-Off Time t OFF VCC = +2.7V, VNC_ or VNO_ = +1.5V, RL = 50, CL = 35pF, Figure 1 (Note 4) 0.5 Off-Isolation VISO RS = RL = 50, f = 20kHz, VCOM_ = 1VP-P, Figure 2 (Note 5) -90 dB Crosstalk VCT RS = RL = 50, f = 20kHz, VCOM_ = 1VP-P, Figure 2 (Note 6) -110 dB f = 20Hz to 20kHz, VCOM_ = 0.5VP-P, RS = RL = 50, DC bias = 0V 0.004 % Total Harmonic Distortion THD+N NC_, NO_ Off-Capacitance C OFF COM_ = GND (DC bias), f = 1MHz, VNO(NC) = 100mVP-P, (Figure 3) 45 pF COM_ On-Capacitance C ON COM_ = GND (DC bias), f = 1MHz, VCOM = 100mV P-P (Figure 3) 65 pF DIGITAL I/O (CB, CB1, CB2, EN) Input Logic-High VIH Input Logic-Low VIL Input Leakage Current ICB 1.4 VCB_ = VEN = 0V or VCC -1 V 0.5 V +1 μA Note 2: All devices are 100% production tested at TA = +25°C. All temperature limits are guaranteed by design. Note 3: Flatness is defined as the difference between the maximum and minimum values of on-resistance as measured over the specified analog ranges. Note 4: All timing is measured using 10% and 90% levels. Note 5: Off-isolation = 20log [VCOM_/(VNO_ or VNC_)], VCOM_ = output, VNO_ or VNC_ = input to off switch. Note 6: Between any two switches. _______________________________________________________________________________________ 3 MAX4991–MAX4994 ELECTRICAL CHARACTERISTICS (continued) MAX4991–MAX4994 Low RON, Dual-SPDT/Single-DPDT Analog Switches with Slow Turn-On Time Test Circuits/Timing Diagrams MAX4991/MAX4992/ MAX4993/MAX4994 COM_ NO_ VIN_ 50% VIL VOUT OR NC_ RL t OFF CL CB_ VOUT LOGIC INPUT SWITCH OUTPUT ( 0.9 x V0UT 0V 0.1 x VOUT t ON CL INCLUDES FIXTURE AND STRAY CAPACITANCE. RL RL + RON VOUT = VIN_ t R < 5ns t F < 5ns VIH LOGIC INPUT IN DEPENDS ON SWITCH CONFIGURATION; INPUT POLARITY DETERMINED BY SENSE OF SWITCH. ) Figure 1. Switching Time VCC V OFF-ISOLATION = 20log OUT VIN NETWORK ANALYZER 0V OR VCC CB_ NO_ 50Ω VIN V ON-LOSS = 20log OUT VIN 50Ω V CROSSTALK = 20log OUT VIN MAX4991/MAX4992/ NC1 MAX4993/MAX4994 COM_ 50Ω VOUT 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. 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 2. On-Loss, Off-Isolation, and Crosstalk MAX4991/MAX4992/ MAX4993/MAX4994 COM_ CB CAPACITANCE METER VIL OR VIH NC_ OR NO_ f = 1MHz Figure 3. Channel Off-/On-Capacitance 4 _______________________________________________________________________________________ Low RON, Dual-SPDT/Single-DPDT Analog Switches with Slow Turn-On Time ON-RESISTANCE vs. VCOM VCC = +2.7V VCC = +3.3V 0.3 0.2 VCC = +5.0V 0.40 TA = +25°C 0.35 0.30 TA = -40°C 0.25 0.296 0.294 0.292 0.10 2 3 1 2 3 0 3 2 VCOM (V) VCOM (V) QUIESCENT SUPPLY CURRENT vs. TEMPERATURE QUIESCENT SUPPLY CURRENT vs. SUPPLY VOLTAGE QUIESCENT SUPPLY CURRENT vs. LOGIC LEVEL 3.0 VCC = 5.5V 2.0 VCC = 2.7V 1.0 0.5 0 3.0 2.5 2.0 1.5 1.0 0.5 10 60 35 85 7 6 5 4 3 2 0 1.5 2.5 3.5 TA (°C) 4.5 0 5.5 TURN-ON TIME vs. SUPPLY VOLTAGE 370 360 350 340 330 320 MAX4992/MAX4994 25 20 15 10 500 450 400 TURN-OFF TIME (ns) 380 30 TURN-ON TIME (μs) MAX4991/MAX4993 4 6 TURN-OFF TIME vs. SUPPLY VOLTAGE TURN-ON TIME vs. SUPPLY VOLTAGE MAX4991-MAX4994 toc07 400 2 VCB or VCB1 (V) VCC (V) MAX4991-MAX4994 toc08 10 8 1 0 -15 VCC = +5.5V VCB2 = VEN = 0V 9 MAX4991-MAX4994 toc09 1.5 VCB1 = VCB2(EN) = 0V QUIESCENT SUPPLY CURRENT (μA) 3.5 3.5 MAX4991-MAX4994 toc05 MAX4991-MAX4994 toc04 VCB1 = VCB2(EN) = 0V -40 1 VCOM (V) 4.0 2.5 0.290 0 5 4 MAX4991-MAX4994 toc06 1 QUIESCENT SUPPLY CURRENT (μA) 0 TURN-ON TIME (ms) 0.298 0.15 0 390 VCC = +2.7V 0.20 0.1 QUIESCENT SUPPLY CURRENT (μA) TA = +85°C 0.300 MAX4991-MAX4994 toc03 0.4 MAX4991-MAX4994 toc02 VCC = +1.8V VCC = +2.7V 0.45 ON-RESISTANCE (Ω) MAX4991-MAX4994 toc01 ON-RESISTANCE (Ω) 0.5 RON FLATNESS vs. VCOM 0.50 ON-RESISTANCE (Ω) ON-RESISTANCE vs. VCOM 0.6 350 300 250 200 150 100 5 50 310 300 0 0 2.5 3.5 4.5 SUPPLY VOLTAGE (V) 5.5 2.5 3.5 4.5 SUPPLY VOLTAGE (V) 5.5 2.5 3.5 4.5 5.5 SUPPLY VOLTAGE (V) _______________________________________________________________________________________ 5 MAX4991–MAX4994 Typical Operating Characteristics (VCC = +3.0V, TA = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (VCC = +3.0V, TA = +25°C, unless otherwise noted.) TOTAL HARMONIC DISTORTION + NOISE vs. FREQUENCY FREQUENCY RESPONSE ON-RESPONSE -40 OFF-RESPONSE -60 -80 CROSSTALK -100 MAX4991-MAX4994 toc11 -20 RL = 50Ω 0.1 VCC = +2.8V CCL = 100μF RL = 16Ω VIN 2V/div THD+N (%) 0 SLOW TURN-ON RESPONSE MAX4991 toc12 1 MAX4991-MAX4994 toc10 20 MAGNITUDE (dB) MAX4991–MAX4994 Low RON, Dual-SPDT/Single-DPDT Analog Switches with Slow Turn-On Time VCOM 1V/div 0.01 -120 ICOM 10mA/div -140 -160 0.001 10 100 1000 10,000 100,000 10 FREQUENCY (Hz) 100 1000 100,000 FREQUENCY (Hz) 20ms/div Pin Description PIN NAME MAX4991/MAX4992 MAX4993/MAX4994 1 1 VCC 2 2 NO1 6 FUNCTION Positive-Supply Voltage Input. Bypass VCC to GND with a 0.1µF capacitor as close as possible to the device. Analog Switch 1—Normally Open Terminal Analog Switch 1—Common Terminal. COM1 must be connected to the speaker load for click-and-pop reduction. 3 3 COM1 4 — CB1 Digital Control Input for Switch 1 Digital Control Input for Switch 1 and Switch 2 — 4 CB 5 5 NC1 Analog Switch 1—Normally Closed Terminal 6 6 GND Ground 7 7 NC2 Analog Switch 2—Normally Closed Terminal 8 — CB2 Digital Control Input for Switch 2 — 8 EN 9 9 COM2 10 10 NO2 Active-Low Enable Input—Drive EN high to put switches in high impedance. Drive EN low for normal operation. Analog Switch 2—Common Terminal. COM2 must be connected to the speaker load for click-and-pop reduction. Analog Switch 2—Normally Open Terminal _______________________________________________________________________________________ Low RON, Dual-SPDT/Single-DPDT Analog Switches with Slow Turn-On Time MAX4991/MAX4992 MAX4993/MAX4994 CB1 CB NC1 NC1 COM1 NO1 COM1 NO1 NC2 NC2 COM2 COM2 NO2 NO2 CB2 EN MAX4991/MAX4992 MAX4993/MAX4994 NC_ CB1 NO1 NC1 EN CB NO_ 0 OFF ON 0 0 OFF ON 1 ON OFF 0 1 ON OFF 1 X OFF OFF MAX4991/MAX4992 X = DON'T CARE. CB2 NO2 NC2 0 OFF ON 1 ON OFF Detailed Description The MAX4991–MAX4994 low 0.3Ω (typ) on-resistance analog switches have break-before-make switching and operate from a single +1.8V to +5.5V supply. The MAX4991/MAX4993 provide a slow turn-on time, and with COM_ used as the output, reduce clicks and pops due to coupling capacitors and audio amplifiers with a DC output bias. This feature is important for existing architectures with coupling capacitors at the output that need click-and-pop reduction. The MAX4993/MAX4994 DPDT switches with an activelow enable input (EN) set all channels to high impedance and reduce supply current when driven high. The MAX4991–MAX4994 have a low 0.004% THD+N to route high-fidelity audio signals. Digital Control Input The MAX4991/MAX4992 have two digital control logic inputs, CB1 and CB2. The MAX4993/MAX4994 have a single digital-control logic input, CB. The digital control logic inputs control the position of the corresponding switch as shown in the Functional Diagram. Driving logic inputs rail-to-rail minimizes power consumption. Enable Input (MAX4993/MAX4994) The MAX4993/MAX4994 feature an active-low enable input (EN). When EN is driven high, the switches are high impedance and reduce supply current. When EN is driven low, the MAX4993/MAX4994 operate in normal mode. Driving EN rail-to-rail minimizes power consumption. _______________________________________________________________________________________ 7 MAX4991–MAX4994 Functional Diagram MAX4991–MAX4994 Low RON, Dual-SPDT/Single-DPDT Analog Switches with Slow Turn-On Time Analog Signal Levels The MAX4991–MAX4994 have a very low and stable RON, 0.3Ω (typ), as the analog input signals are swept from ground to VCC (see Typical Operating Characteristics). These switches are bidirectional, allowing NO_, NC_, and COM_ to be configured as either inputs or outputs; however, click-and-pop reduction is only operational when COM_ is used as the output. Power-Supply Rejection Ratio PSRR is the measurement of AC power-supply ripple or noise that couples to the output. Variations in supply voltage corrupt the audio signal due to changes in the RON value by supply modulation. The MAX4991–MAX4994 maintain a 80dB (typ) PSRR across the supply-voltage range, eliminating any corruption of the audio signal from supply variations. Therefore, with no audio signal, the RON variation due to supply-voltage ripple does not contribute to any output signal modulation. Applications Information Click-Pop Reduction The MAX4991/MAX4993 feature a slow switch turn-on that can reduce click-and-pop noise caused by abrupt changes in voltage across a speaker. These voltage 8 changes usually occur when a single-supply audio amplifier with a DC bias is turned on, causing a spike of current in the speaker while the coupling capacitor charges (see the Typical Operating Circuit). If the audio amplifier connected to the unused input is powered up before the switch position changes, the MAX4991/ MAX4993 reduce the current spike to COM_. The speaker load must be present so that the current charging the coupling capacitor has a path to ground. Layout Good layout improves performance by decreasing the amount of stray capacitance and noise. Minimize PCB trace lengths and resistor leads and place external components as close as possible to the device. Power-Supply Sequencing 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 devices. Always apply VCC before applying analog signals especially if the analog signal is not current limited. _______________________________________________________________________________________ Low RON, Dual-SPDT/Single-DPDT Analog Switches with Slow Turn-On Time VCC 0.1μF NC1 AUDIO AMPLIFIER NC2 MAX4991/MAX4992 CB1 COM1 COM2 NO1 AUDIO AMPLIFIER CB2 NO2 GND Chip Information PROCESS: BiCMOS Package Information For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. PACKAGE TYPE PACKAGE CODE DOCUMENT NO. 10 UTQFN V101AICN-1 21-0028 _______________________________________________________________________________________ 9 MAX4991–MAX4994 Typical Application Circuit MAX4991–MAX4994 Low RON, Dual-SPDT/Single-DPDT Analog Switches with Slow Turn-On Time Revision History REVISION NUMBER REVISION DATE 0 5/08 Initial release. 6/09 • Corrected names of power pins (added subscripting) in Electrical Characteristics. • Changed the name of TOC 10 to “Frequency Response.” • Added units of measure to TOC 12. 1 DESCRIPTION PAGES CHANGED — 2, 6 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. 10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2009 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.