19-77; Rev ; 7/4.75Ω, Dual SPDT Audio Switch with General Description The dual, single-pole/double-throw (SPDT) switch operates from a single +2V to +5.5V supply and features rail-to-rail signal handling. The has low on-resistance (.75Ω) with a +V supply making it ideal for audio switching applications in portable devices. The device also integrates two internal comparators that can be used for headphone detection or mute/send key functions. The is available in the space-saving (mm x mm), 16-pin thin QFN package and operates over the extended temperature range of -4 C to +85 C. Speaker Headset Switching Audio-Signal Routing Cellular Phones Notebook Computers PDAs and Other Handheld Devices Applications Audio Signal Routing.75Ω On-Resistance.18Ω On-Resistance Flatness.7Ω Channel-to-Channel Matching Rail-to-Rail Signal Handling 2 1.8V Logic Compatible 2V to 5.5V Supply Range Available in a Space-Saving (mm x mm), 16-Pin TQFN Package PART *EP = Exposed paddle. Features Ordering Information TEMP RANGE PIN- PACKAGE TOP MARK ETE -4 C to +85 C 16 TQFN-EP* ABY Block Diagram/Truth Table Pin Configuration NC1.75Ω COM1 IN_ NO_ NC_ OFF ON 1 ON OFF TOP VIEW NC1 16 IN1 VCC COUT2 15 14 1 NO1 NC2 NO2.75Ω IN1 IN2 COM2 SWITCHES SHOWN FOR LOGIC INPUT N.C. CIN1 CIN2 COM1 1 2 4 12 11 1 9 NO2 COUT1 COM2 IN2 COUT1 CIN1 5 6 7 8 NO1 NC2 THIN QFN N.C. COUT2 CIN2 CONNECT EXPOSED PADDLE TO GROUND. 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.
ABSOLUTE MAXIMUM RATINGS, IN_, CIN_ to...-.v to +6.V NO_, NC_, COM_, COUT_ (Note 1)...-.V to ( +.V) COUT_ Continuous Current...±2mA Closed Switch Continuous Current COM_, NO_, NC_...±mA Peak Current COM_, NO_, NC_ (pulsed at 1ms, 5% duty cycle)...±4ma Peak Current COM_, NO_, NC_ (pulsed at 1ms, 1% duty cycle)...±5ma Note 1: Signals on NO, NC, or COM exceeding or are clamped by internal diodes. Signals on IN exceeding are clamped by an internal diode. Limit forward-diode current to maximum current rating. 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 Continuous Power Dissipation (T A = +7 C) 16-Pin Thin QFN (derate 2.8mW/ C above +7 C)...1667mW Operating Temperature Range...-4 C to +85 C Junction Temperature...+15 C Storage Temperature Range...-65 C to +15 C Lead Temperature (soldering, 1s)...+ C ( = +2.7V to +5.5V, T A = -4 C to +85 C, unless otherwise noted. Typical values are at = +.V, T A = +25 C, unless otherwise noted.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage 2 5.5 V Supply Current I CC = 5.5V, V IN_ = V or 5 1 µa ANALOG SWITCH Analog Signal Range V NO_, V NC_, V V COM_ On-Resistance (Note ) R ON 1mA, V NC_ or V NO_ = V = 2.7V, I COM_ = T A = +25 C.75 1 to T A = -4 C to +85 C 1.1 Ω On-Resistance Match Between Channels (Notes, 4) R ON = 2.7V, I COM = 1mA, V NC_ or V NO_ = 1.5V T A = +25 C.75.12 T A = -4 C to +85 C.15 Ω On-Resistance Flatness (Note 5) NO_/NC_ Off-Leakage Current (Note 2) R FLAT 1mA, V NC_ or V NO_ = = 2.7V, I COM_ = T A = +25 C.18.275.75V, 1.5V, 1.75V T A = -4 C to +85 C. I OFF 1V or 4.5V, V COM_ = 4.5V or = 5.5V, V NC_ or V NO_ = T A = +25 C -2 +2 1V T A = -4 C to +85 C -1 +1 Ω na COM_ On-Leakage Current (Note 2) DYNAMIC CHARACTERISTICS I ON 1V, 4.5V, or floating; V COM_ = 5.5V; V NC_ or V NO_ = T A = +25 C -2 +2 = 1V, 4.5V, or floating T A = -4 C to +85 C -15 +15 Turn-On Time t ON 1.5V, R L = Ω, C L = 5pF = 2.7V, V NO_ or V NC_ = T A = +25 C 4 6 (Figure 1) T A = -4 C to +85 C 1 na ns 2
ELECTRICAL CHARACTERISTICS (continued) ( = +2.7V to +5.5V, T A = -4 C to +85 C, unless otherwise noted. Typical values are at = +.V, T A = +25 C, unless otherwise noted.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Turn-Off Time t OFF 1.5V, R L = Ω, C L = 5pF = 2.7V, V NO_ or V NC_ = T A = +25 C 4 (Figure 1) T A = -4 C to +85 C 6 Break-Before-Make Time Delay (Note ) t D 1.5V, R L = 5Ω, C L = 5pF = 2.7V, V NO_ or V NC_ = T A = +25 C 15 (Figure 2) T A = -4 C to +85 C 2 Charge Injection Q V COM_ = 1.5V, R S = Ω, C L = 1.nF (Figure ) 17 pc Off-Isolation (Note 6) f = 1kHz, V COM_ = 1V RMS, R L = 5Ω, C L = 5pF (Figure 4) Crosstalk V CT f = 1kHz, V COM_ = 1V RMS, R L = 5Ω, C L = 5pF (Figure 4) ns ns -75 db -9 db -db Bandwidth BW Signal = dbm, R L = 5Ω, C L = 5pF (Figure 4) 8 MHz Total Harmonic Distortion THD f = 2Hz to 2kHz, V COM_ = 1V + 2V P-P, R L = 2Ω.7 % NO_/NC_ Off- Capacitance C OFF f = 1MHz (Figure 5) 5 pf COM On-Capacitance C ON f = 1MHz (Figure 5) 15 pf DIGITAL I/O (IN_) = 2V to.6v 1.4 Input-Logic High Voltage V IH =.6V to 5.5V 1.8 V = 2V to.6v.5 Input-Logic Low Voltage V IL =.6V to 5.5V.8 V Input Leakage Current I IN V IN_ = or 5.5V -.5 +.5 µa COMPARATOR Comparator Range 5.5 V Comparator Threshold = 2V to 5.5V, falling input Comparator Hysteresis = 2V to 5.5V 5 mv Comparator Output High Voltage Comparator Output Low Voltage I SOURCE = 1mA. x -.4V. x.6 x I SINK = 1mA.4 V Comparator Switching Rising input (Figure 6) 2.5 Time Falling input (Figure 6).5 Note 2: Specifications are 1% tested at T A = +85 C only, and guaranteed by design and characterization over the specified temperature range. Note : Guaranteed by design and characterization; not production tested. Note 4: R ON = R ON(MAX) - R ON(MIN). Note 5: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal ranges. Note 6: Off-Isolation = 2log 1 (V COM_ / V NO_ ), V COM_ = output, V NO_ = input to off switch. V V µs
( =.V, T A = +25 C, unless otherwise noted.) ON-RESISTANCE (Ω).5. 2.5 2. 1.5 1..5 ON-RESISTANCE vs. COM VOLTAGE = 1.8V = 2.V = 2.V = 2.5V =.V = 5.V toc1 ON-RESISTANCE (Ω) 1..8.6.4.2 ON-RESISTANCE vs. COM VOLTAGE =.V T A = +85 C T A = +25 C T A = -4 C Typical Operating Characteristics toc2 ON-RESISTANCE (Ω) ON-RESISTANCE vs. COM VOLTAGE 1. = 5.V.8 T A = +85 C T A = +25 C.6.4.2 T A = -4 C toc 2 4 6 COM VOLTAGE (V).5 1. 1.5 2. 2.5. 1 2 4 5 COM VOLTAGE (V) COM VOLTAGE (V) SUPPLY CURRENT (µa) 6 5 4 SUPPLY CURRENT vs. SUPPLY VOLTAGE T A = -4 C T A = +25 C T A = +85 C toc4 TURN-ON/TURN-OFF TIME (ns) 7 6 5 4 2 1 TURN-ON/TURN-OFF TIME vs. SUPPLY VOLTAGE t OFF t ON toc5 TURN-ON/TURN-OFF TIME (ns) 8 6 4 2 28 26 24 t ON t OFF TURN-ON/TURN-OFF TIME vs. TEMPERATURE toc6 2 1.5 2.5.5 4.5 5.5 SUPPLY VOLTAGE (V) 1.5 2.5.5 4.5 5.5 SUPPLY VOLTAGE (V) 22-4 -15 1 5 6 85 TEMPERATURE ( C) LOGIC THRESHOLD (V) LOGIC THRESHOLD vs. SUPPLY VOLTAGE 1.6 1.4 V IN RISING 1.2 1. V IN FALLING.8 toc7 CHARGE INJECTION (pc) 2 18 16 14 12 1 8 6 4 CHARGE INJECTION vs. COM VOLTAGE = V = 5V toc8 LEAKAGE CURRENT (na).8.6.4.2 LEAKAGE CURRENT vs. TEMPERATURE COM ON-LEAKAGE COM OFF-LEAKAGE toc9 2.6 1.5 2.5.5 4.5 5.5 SUPPLY VOLTAGE (V) 1 2 4 5 COM VOLTAGE (V) -4-15 1 5 6 85 TEMPERATURE ( C) 4
Typical Operating Characteristics (continued) ( =.V, T A = +25 C, unless otherwise noted.) FREQUENCY RESPONSE (db) 2-2 -4-6 -8 FREQUENCY RESPONSE ON-RESPONSE OFF-RESPONSE CROSSTALK toc1 THD (%) 1.1 TOTAL HARMONIC DISTORTION vs. FREQUENCY R L = 2Ω R L = 6Ω toc11-1.1 1 1 1 FREQUENCY (MHz).1 1 1 1k 1k 1k FREQUENCY (Hz) COMPARATOR THRESHOLD (V) 1.1 1.8 1.6 1.4 1.2 =.V COMPARATOR THRESHOLD vs. TEMPERATURE V CMPI_ RISING V CMPI_ FALLING toc12 COMPARATOR THRESHOLD (V) 1.75 1.725 1.7 1.675 1.65 1.625 = 5.V COMPARATOR THRESHOLD vs. TEMPERATURE V CMPI_ RISING V CMPI_ FALLING toc1 1. -4-15 1 5 6 85 TEMPERATURE ( C) 1.6-4 -15 1 5 6 85 TEMPERATURE ( C) 5
PIN NAME FUNCTION 1, 8 N.C. No Connection. Not internally connected. 2 CIN1 Inverting Input for Comparator 1 CIN2 Inverting Input for Comparator 2 4 COM1 Common Terminal for Analog Switch 1 5 NO1 Normally Open Terminal for Analog Switch 1 6 Ground 7 NC2 Normally Closed Terminal for Analog Switch 2 Pin Description 9 IN2 Digital Control Input for Analog Switch 2. A logic LOW on IN2 connects COM2 to NC2 and a logic HIGH connects COM2 to NO2. 1 COM2 Common Terminal for Analog Switch 2 11 COUT1 Output for Comparator 1 12 NO2 Normally Open Terminal for Analog Switch 2 1 COUT2 Output for Comparator 2 14 Supply Voltage. Bypass to with a.1µf capacitor as close to the pin as possible. 15 IN1 Digital Control Input for Analog Switch 1. A logic LOW on IN1 connects COM1 to NC1 and a logic HIGH connects COM1 to NO1. 16 NC1 Normally Closed Terminal for Analog Switch 1 EP Exposed Paddle. Connect to PC board ground plane. Detailed Description The dual SPDT, low on-resistance, low-voltage, analog switch operates from a +2V to +5.5V supply and can handle signals up to the power rails. In addition, the integrates two internal comparators that can be used for headphone or mute detection. The comparator threshold is internally generated to be approximately 1/ of. Applications Information Digital Control Inputs The logic inputs (IN_) accept up to +5.5V even if the supply voltages are below this level. For example, with a +.V supply, IN_ can be driven low to and high to +5.5V allowing for mixing of logic levels in a system. Driving IN_ rail-to-rail minimizes power consumption. For a +2V supply voltage, the logic thresholds are.5v (low) and 1.4V (high); for a +5V supply voltage, the logic thresholds are.8v (low) and 1.8V (high). Analog Signal Levels The on-resistance of these switches changes very little for analog input signals across the entire supply voltage range (see the Typical Operating Characteristics). The switches are bidirectional, so the NO_, NC_, and COM_ pins can be either inputs or outputs. Comparator The positive terminal of the comparator is internally set to /. When the negative terminal (CIN_) is below the threshold ( /), the comparator output (COUT_) is high. When CIN_ rises above /, COUT_ is low. The comparator threshold allows for detection of headphones since headphone audio signals are typically biased to /2. 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 CMOS devices. Always apply before applying analog signals, especially if the analog signal is not current-limited. 6
LOGIC INPUT V NO NO_ IN_ COM_ R L C L Test Circuits/Timing Diagrams LOGIC INPUT SWITCH OUTPUT V V 5% t ON t OFF tr < 2ns tf < 2ns.9 x V UT.9 x C L INCLUDES FIXTURE AND STRAY CAPACITANCE. = V NO ( R L R L + R ON ) Figure 1. Switching Time V N_ NC_ NO_ COM_ LOGIC INPUT V 5% IN_ R L C L LOGIC INPUT.9 x t BBM C L INCLUDES FIXTURE AND STRAY CAPACITANCE. Figure 2. Break-Before-Make Interval 7
V GEN R GEN NC_ OR NO_ IN_ COM_ C L VOUT IN OFF ON OFF V IL TO V IH IN OFF ON Q = ( )(C L ) OFF LOGIC-INPUT WAVEFORMS INVERTED FOR SWITCHES THAT HAVE THE OPPOSITE LOGIC SENSE. Figure. Charge Injection V OR IN_ +5V 1nF COM1 V IN NETWORK ANALYZER 5Ω 5Ω OFF-ISOLATION = 2log V IN ON-LOSS = 2log V IN NC1 NO1* MEAS REF CROSSTALK = 2log V IN 5Ω 5Ω 5Ω 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 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. On-Loss, Off-Isolation, and Crosstalk 1nF COM_ CAPACITANCE METER f = 1MHz NC_ OR NO_ IN V IL OR V IH Figure 5. Channel Off-/On-Capacitance 8
V CIN_ NO_ CIN_ COUT_ V COUT_ V TH + 1mV COMPARATOR INPUT (V CIN_ ) V TH - 1mV COMPARATOR OUTPUT (V COUT_ ) t COMP 5% 5% 5% t R < 2ns t F < 2ns 5% t COMP V TH = / V Figure 6. Comparator Switching Time Typical Operating Circuit Chip Information TRANSISTOR COUNT: 75 PROCESS: CMOS AUDIO SOURCE 1 OUT+ OUT- NC1 COM1 NO1 IN1 INPUT SELECT 8Ω SPEAKER NC2 IN2 AUDIO SOURCE 2 MUTE OUT+ OUT- NO2 COM2 COUT CIN MUTE BUTTON 9
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.) LC D D/2 E/2 E (NE - 1) X e D2/2 D2 b.1 M C A B E2/2 E2 12x16L QFN THIN.EPS L LC e k (ND - 1) X e LC C L.1 C.8 C A A2 A1 L L e e PACKAGE OUTLINE 12, 16L, THIN QFN, xx.8mm 21-16 E 1 2 EXPOSED PAD VARIATIONS DOWN BONDS ALLOWED NOTES: 1. DIMENSIONING & TOLERANCING CONFORM TO ASME Y14.5M-1994. 2. ALL DIMENSIONS ARE IN MILLIMETERS. ANGLES ARE IN DEGREES.. N IS THE TOTAL NUMBER OF TERMINALS. 4. THE TERMINAL #1 IDENTIFIER AND TERMINAL NUMBERING CONVENTION SHALL CONFORM TO JESD 95-1 SPP-12. DETAILS OF TERMINAL #1 IDENTIFIER ARE OPTIONAL, BUT MUST BE LOCATED WITHIN THE ZONE INDICATED. THE TERMINAL #1 IDENTIFIER MAY BE EITHER A MOLD OR MARKED FEATURE. 5. DIMENSION b APPLIES TO METALLIZED TERMINAL AND IS MEASURED BETWEEN.2 mm AND.25 mm FROM TERMINAL TIP. 6. ND AND NE REFER TO THE NUMBER OF TERMINALS ON EACH D AND E SIDE RESPECTIVELY. 7. DEPOPULATION IS POSSIBLE IN A SYMMETRICAL FASHION. 8. COPLANARITY APPLIES TO THE EXPOSED HEAT SINK SLUG AS WELL AS THE TERMINALS. 9. DRAWING CONFORMS TO JEDEC MO22 REVISION C. PACKAGE OUTLINE 12, 16L, THIN QFN, xx.8mm 21-16 E 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. 1 Maxim Integrated Products, 12 San Gabriel Drive, Sunnyvale, CA 9486 48-77-76 24 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.