MAX14759/MAX14761/MAX14763 Above- and Below-the-Rails Low On-Resistance Analog Switches

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1 19-651; Rev ; 9/11 /MX14761/ General Description The /MX14761/ analog switches are capable of passing bipolar signals that are beyond their supply rails. These devices operate from a single +3.V to +5.5V supply and support signals in the -25V to +25V range. The is a single-pole/single-throw (SPST) analog switch, while the MX14761 is a dual-spst analog switch. The is a single-pole/double-throw (SPDT) analog switch. The features 1I (max) on-resistance with a Q2n (max) on-leakage current. The MX14761/ feature 2I (max) on-resistance with a Q1n (max) on-leakage current. The low on-resistance and high bandwidth allow use in digital- and analog-signal switching applications. The / are available in an 8-pin (3mm x 3mm) TDFN package. The MX14761 is available in a 1-pin (3mm x 3mm) TDFN package. These devices are specified over the -4NC to +85NC extended temperature range. Ordering Information/Selector Guide appears at end of data sheet. For related parts and recommended products to use with this part, refer to Benefits and Features S Simplify Power-Supply Requirements +3.V to +5.5V Supply Range -25V to +25V Signal Range S High Performance Low 1I (max) or 2I (max) On-Resistance Low 2.4mI (typ) and 5.1mI (typ) R ON Flatness 5m (max) Switch Current for Thermal Shutdown Protection -4NC to +85NC Operating Temperature Range High Bandwidth: 1MHz (typ) Insertion Loss High-ESD Protection Up to 2kV S Save Board Space Small 8-Pin and 1-Pin TDFN Packages Industrial Measurement Systems Instrumentation Systems RS-485 Termination Switching CN Bus Termination Switching Opto-Relay Replacement Medical Systems TE Systems udio Signal Routing and Switching pplications Functional Diagrams/Truth Tables MX14761 V P SUPPLY GENERTION V N V P SUPPLY GENERTION V N V P SUPPLY GENERTION V N EN B 1 EN1 B1 1 COM B2 SEL EN2 EN EN1 1 EN2 SEL 1 OPEN CLOSED OPEN CLOSED OPEN 1 CLOSED 1 OPEN 1 CLOSED 1 OPEN CLOSED Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at , or visit Maxim s website at

2 BSOLUTE MXIMUM RTINGS (ll voltages referenced to, unless otherwise noted.)...-.3v to +6V EN, EN1, EN2, SEL...-.3V to + ( +.3V), B, 1,, B1, B2, COM... (V N -.3V) to Lesser of (V P +.3V) or (V N + 52V) V P V to Lesser of (+52V) or (V N + 7V) V N...Greater of ( - 4V) or (V P - 7V) to +.3V V P to V N...-.3V to +7V Continuous Current Through Switch ()... Q5m 8-Pin TDFN Junction-to-mbient Thermal Resistance (q J )...48 C/W Junction-to-Case Thermal Resistance (q JC )...8 C/W /MX14761/ Continuous Current Through Switch (MX14761, )... Q25m Continuous Power Dissipation (T = +7NC) 8-Pin TDFN Package (derate 24.4mW/NC above +7NC) mW 1-Pin TDFN Package (derate 24.4mW/NC above +7NC) mW Operating Temperature Range... -4NC to +85NC Storage Temperature Range NC to +16NC Lead Temperature (soldering, 1s)...+3NC Soldering Temperature (reflow)...+26nc Stresses beyond those listed under bsolute 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. PCKGE THERML CHRCTERISTICS (Note 1) 1-Pin TDFN Junction-to-mbient Thermal Resistance (q J )...41 C/W Junction-to-Case Thermal Resistance (q JC )...9 C/W Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a fourlayer board. For detailed information on package thermal considerations, refer to ELECTRICL CHRCTERISTICS ( = +3.V to +5.5V, T = -4 C to +85 C, unless otherwise noted. Typical values are at = 5V and T = +25 C.) (Note 2) PRMETER SYMBOL CONDITIONS MIN TYP MX UNITS DC CHRCTERISTICS Power Supply Range V Continuous Current Through Switch Supply Current I CC 4.7V nalog-signal Range () I _ (MX14761/) > 4.7V V EN_ = V EN_ = / V EN_ = V EN_ = / V COM, V _, V B_ Switch open or closed V On-Resistance R ON I COM or I B_ = Q25m, V _ = Q25V (MX14761/) I B = Q5m, V = Q25V ().6 1 On-Resistance Flatness DR ON -25V < V _ < +25V, I B_ or I COM = Q25m (MX14761/) V < V < +25V, I B = Q5m () 2.4, 1, Off-Leakage Current I _(OFF) V _ = +25V, V COM or V B_ = V, Figure 1 (MX14761/) V = +25V, V B = V, Figure 1 () COM, B, B1, B2 Off-Leakage Current I COM(OFF), I B_(OFF) V COM or V B = 15V, V _ = V, Figure 1 (/) V B_ = 15V, V _ = V, Figure 1 (MX14761) m m I mi n n Maxim Integrated Products 2

3 /MX14761/ ELECTRICL CHRCTERISTICS (continued) ( = +3.V to +5.5V, T = -4 C to +85 C, unless otherwise noted. Typical values are at = 5V and T = +25 C.) (Note 2) PRMETER SYMBOL CONDITIONS MIN TYP MX UNITS V = ±25V, B1, B2, or COM are unconnected, Figure 1 () On-Leakage Current DIGITL LOGIC Input-Voltage Low Input-Voltage High I ON V IL V IH V = ±25V, B1, B2, or COM are unconnected, Figure 1 (MX14761) V = ±25V, B1, B2, or COM are unconnected, Figure 1 () = 3.V.7 = 3.6V.7 = 4.5V.8 = 5.5V.8 = 3.V 1.7 = 3.6V 1.9 = 4.5V 2. = 5.5V 2.1 Input Current I L µ C CHRCTERISTICS Power-On Time t PWRON V _ = Q1V, C VP = C VN = 1FF, Note 3 32 ms Enable Turn-On Time t ON MX14761) V _ = Q1V, R L = 1kI, Figure 2 (/ n V V Fs V _ = Q1V, R L = 1kI, Figure 2 () ms Enable Turn-Off Time t OFF V _ = Q1V, R L = 1kI, Figure Fs Break-Before-Make Interval t BBM V _ = 1V RMS, R L = 1kI, Figure 3 () 74 Fs Off-Isolation V ISO V _ = 1V RMS, f = 1kHz, R L = 5I, C L = 15pF, Figure 4 Crosstalk V CT R S = R L = 5I, f = 1kHz, V COM = 1V RMS, Figure 5 () -77 db -83 db -3dB Bandwidth BW R S = 5I, R L = 5I, V _ = 1V P-P, Figure 6 1 MHz Total Harmonic Distortion Plus Noise THD+N R S = R L = 1kI, f = 2Hz to 2kHz.12 % Charge Injection Q V _ =, C L = 1nF, Figure pc Input Capacitance C IN t, 1,, B, B1, B2, and COM pins 58 pf THERML PROTECTION Thermal Shutdown Temperature t HYST +154 NC Shutdown Temperature Hysteresis t SHUT 24 NC ESD PROTECTION ll Pins Human Body Model Q2 kv Note 2: ll devices are 1% production tested at T = +25NC. Specifications over operating temperature range are guaranteed by design. Note 3: The power-on time is defined as the settling time for the charge pump s output to reach steady-state value within 1%. Maxim Integrated Products 3

4 /MX14761/ Test Circuits/Timing Diagrams.1µF.1µF MX14761 MX14761 _ B_/COM _ B_/COM UNCONNECTED EN_/SEL EN_/SEL SWITCH OPEN SWITCH CLOSED OFF-LEKGE CURRENT ON-LEKGE CURRENT Figure 1. Leakage Current Measurement.1µF MX14761 LOGIC INPUT 5% t ON 5% t OFF +1V LOGIC INPUT _ EN_/SEL B_/COM R L V OUT SWITCH OUTPUT (V OUT ).9 x V OUT.1 x V OUT Figure 2. Switching Time Maxim Integrated Products 4

5 /MX14761/ Test Circuits/Timing Diagrams (continued).1µf +1V LOGIC INPUT 1 SEL COM R L 1kI C L V OUT LOGIC INPUT V SWITCH OUTPUT (V OUT ) 5%.8 x V OUT C L INCLUDES FIXTURE ND STRY CPCITNCE. t BBM Figure 3. Break-Before-Make.1µF OFF-ISOLTION = 2LOG V B_/COM V _ MX14761 _ B_/COM NLYZER SIGNL GENERTOR SWITCH OPEN EN_/SEL R L C L Figure 4. Off-Isolation Maxim Integrated Products 5

6 /MX14761/ Test Circuits/Timing Diagrams (continued).1µf CROSSTLK = 2LOG V COM V NLYZER COM R L C L SIGNL GENERTOR 1 SEL 5I Figure 5. Crosstalk.1µF EN_/SEL MX14761 _ V IN NETWORK NLYZER R S R S V IN ON-LOSS = 2LOG V OUT V IN B_/COM V OUT MES REF R L R L Figure 6. Insertion Loss Maxim Integrated Products 6

7 /MX14761/ Test Circuits/Timing Diagrams (continued).1µf _ MX14761 LOGIC INPUT V OFF ON OFF LOGIC INPUT EN_/SEL B_/COM V OUT C L = 1nF SWITCH OUTPUT (V OUT) DV OUT Q = C L x DV OUT Figure 7. Charge Injection Typical Operating Characteristics (T = +25 C, unless otherwise noted.) ON-RESISTNCE vs. V B_/COM = 3.3V, I B_ = 25m (MX14761), I B = 5m () toc ON-RESISTNCE vs. V COM = 5V, I B_ = 25m (MX14761), I B = 5m () toc ON-RESISTNCE vs. TEMPERTURE () = 5V, I B = 5m toc3 RON (I) MX14761 RON (I) MX14761 RON (I) T = +85 C T = +25 C V B_/COM (V) V COM (V).3 T = -4 C V COM (V) Maxim Integrated Products 7

8 (T = +25 C, unless otherwise noted.) /MX14761/ Typical Operating Characteristics (continued) RON (I) ON-RESISTNCE vs. V COM (MX14761) = 5V, I B_ = 25m T = +85 C T = +25 C T = -4 C toc4 LEKGE CURRENT (n) LEKGE CURRENT vs. TEMPERTURE () ON-LEKGE OFF-LEKGE toc5 LEKGE CURRENT (n) LEKGE CURRENT vs. TEMPERTURE (MX14761) OFF-LEKGE ON-LEKGE toc V COM (V) TEMPERTURE ( C) TEMPERTURE ( C) CHRGE INJECTION (pc) CHRGE INJECTION vs. V B T = +85 C T = +25 C 1 8 T = -4 C V B (V) toc7 SUPPLY CURRENT (m) SUPPLY CURRENT vs. TEMPERTURE 5. V EN = () TEMPERTURE ( C) toc8-2 CROSSTLK vs. FREQUENCY toc9-2 OFF-ISOLTION vs. FREQUENCY toc1 CROSSTLK (db) -4-6 OFF-ISOLTION (db) FREQUENCY (MHz) FREQUENCY (MHz) Maxim Integrated Products 8

9 (T = +25 C, unless otherwise noted.) /MX14761/ Typical Operating Characteristics (continued) INSERTION LOSS (db) INSERTION LOSS vs. FREQUENCY, R L = 5I FREQUENCY (MHz) toc11 THD+N (%) THD+N vs. FREQUENCY FREQUENCY (khz) toc12-2 PSRR vs. FREQUENCY toc TURN-ON/OFF TIME vs. V B_/COM toc14 PSRR (db) -4-6 TURN-ON/OFF TIME (µs) 3 2 t OFF t ON FREQUENCY (khz) V B_/COM (V) Maxim Integrated Products 9

10 /MX14761/ Pin Configurations TOP VIEW EN N.C. V P EN1 EN2 1 V P SEL 1 V P MX *EP + *EP + *EP V N B B1 V N 5 B V N COM TDFN *CONNECT EXPOSED PD (EP) TO V N. Pin Description PIN MX14761 NME FUNCTION Positive-Supply Voltage Input. Bypass to with a.1ff ceramic capacitor placed as close as possible to the device Ground V N Negative Voltage Output. Bypass V N to with a 1FF ceramic capacitor placed as close as possible to the device. 4 B nalog Switch Common Terminal 4 COM nalog Switch Common Terminal 5 nalog Switch Normally Open Terminal V P Positive Voltage Output. Bypass V P to with a 1FF ceramic capacitor placed as close as possible to the device. 7 N.C. No Connection. Leave unconnected. 8 EN Switch Control Input. Drive EN high to close the switch or drive EN low to open the switch nalog Switch 1 Normally Closed Terminal Maxim Integrated Products 1

11 /MX14761/ Pin Description (continued) PIN MX14761 NME 3 B1 nalog Switch 1 Common Terminal FUNCTION 6 5 nalog Switch 2 Normally Open Terminal 5 B2 nalog Switch 2 Common Terminal 1 EN1 9 EN2 8 SEL EP Switch 1 Control Input. Drive EN1 high to open switch 1 or drive EN1 low to close switch 1. Switch 2 Control Input. Drive EN2 high to close switch 2 or drive EN2 low to open switch 2. Switch Control Input. Drive SEL low to connect the COM terminal to 1 or drive SEL high to connect the COM terminal to. Exposed Pad. Internally connected to V N ; not intended as an electrical connection. Leave exposed pad unconnected. Detailed Description The /MX14761/ are analog switches capable of handling signals above and below their rails. These devices operate from a single +3.V to +5.5V supply and support signals in the -25V to +25V range. The low on-resistance and high bandwidth allow for use in digital- and analog-signal switching applications. nalog Signal Range The devices switch signals in the range from -25V to +25V that are above and below their rails. The on-resistance for these devices exhibit a high degree of flatness of 2.4mI ( typ) and 5.1mI (MX14761/ typ) over the whole input voltage range of -25V to +25V. The analog switches allow bidirectional current flow, so, 1,, B, B1, B2, and COM can be used as either inputs or outputs. Bypass Capacitors Bias stabilizing capacitors are required on the V P and V N pins. 1FF ceramic capacitors are suggested for effective operation. V P and V N are not intended as a power supply for other circuitry. pplications Information Power-Up Conditions Ensure that negative signals are not present on the _, B_, or COM inputs until 1 second has passed after applying. Differential Termination Resistor Switch The can be used to switch a differential termination resistor in or out. In RS-485 and CN applications, both ends of high-speed transmission lines require termination. Figures 8 and 9 show an application of RS-485 and CN termination using two equal resistors. These switches support RS-485 s high -7V to +12V commonmode range. In RS-232/RS-485 multiprotocol applications, the can be used for switching in the line-terminating resistors for RS-485 usage, and can disable the termination resistor for RS-232 operation, as shown in Figure 1. The MX14761 is ideal for switching in fail-safe biasing resistors in RS-485 applications, as shown in Figures 11 and 12. Maxim Integrated Products 11

12 /MX14761/ R T /2 MX1484 TERMINTION CONTROL EN B R T /2 Figure 8. RS-485 Termination Switch CNH R T /2 R T /2 EN EN MX351 CTRL CTRL B B MX351 R T/2 R T/2 CNL Figure 9. CN Termination Switch R T /2 MX316 RS-485/ RS-232 CONTROL EN B R T /2 B Figure 1. Multiprotocol Termination Switch Maxim Integrated Products 12

13 /MX14761/ R PU 1 MX14761 R T B1 B2 EN1 EN2 CONTROL RS-485 TRNSCEIVER R PD Figure 11. Pullup and Pulldown Resistance Switch R PU 1 B1 RS-485 TRNSCEIVER CONTROL EN1 EN2 MX14761 B2 R T R PD Figure 12. Fail-Safe Biasing Network Switch Maxim Integrated Products 13

14 /MX14761/ UDIO MPLIFIER 1 1 COM UDIO MPLIFIER 2 1 SEL COM UDIO MPLIFIER 2 CONTROL SEL UDIO MPLIFIER 1 1 SEL COM CONTROL Figure 13. Single-Ended mplifier Switching Figure 14. Differential mplifier Switching udio mplifier Switch The is used for selecting between audio amplifier sources to drive loudspeaker applications (Figures 13 and 14.) Maxim Integrated Products 14

15 /MX14761/ Ordering Information/Selector Guide PRT TEMP RNGE PIN-PCKGE FUNCTION R ON (MX) (I) ET+ -4NC to +85NC 8 TDFN-EP* 1 x SPST 1 MX14761ETB+ -4NC to +85NC 1 TDFN-EP* 2 x SPST 2 ET+ -4NC to +85NC 8 TDFN-EP* 1 x SPDT 2 +Denotes a lead(pb)-free/rohs-compliant package. *EP = Exposed pad. Chip Information Package Information PROCESS: BiCMOS For the latest package outline information and land patterns (footprints), go to Note that a +, #, or - in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PCKGE TYPE PCKGE CODE OUTLINE NO. LND PTTERN NO. 8 TDFN T TDFN T Maxim Integrated Products 15

16 /MX14761/ Revision History REVISION NUMBER REVISION DTE DESCRIPTION PGES CHNGED 9/11 Initial release 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. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated Products, 12 San Gabriel Drive, Sunnyvale, C Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.