19-2042; Rev 1; 2/03 2.5Ω, Low-Voltage, SPST/SPDT Analog Switches in UCSP Package Features ♦ 6-Bump, 0.5mm Pitch, UCSP ♦ RON 2.5Ω max (+3V Supply) 10Ω max (+1.8V Supply) ♦ 0.4Ω max RON Match Between Channels ♦ 1Ω max RON Flatness Over Signal Range ♦ Low Leakage Currents Over Temperature 0.5nA (max) at TA = +25°C ♦ Fast Switching: tON = 30ns, tOFF = 12ns ♦ Guaranteed Break-Before-Make (MAX4688) ♦ +1.8V to +5.5V Single-Supply Operation ♦ Rail-to-Rail® Signal Handling ♦ Low Crosstalk: -95dB (100kHz) ♦ High Off-Isolation: -90dB (100kHz) ♦ 1.8V Logic Compatible ________________________Applications MP3 Players Cellular Phones Power Routing Battery-Operated Equipment Relay Replacement Audio and Video Signal Routing Communications Circuits PCMCIA Cards Cellular Phones Hard Drives Ordering Information TEMP RANGE -40°C to +85°C -40°C to +85°C -40°C to +85°C PART MAX4686EBT-T MAX4687EBT-T MAX4688EBT-T BUMPPACKAGE 6 UCSP-6 6 UCSP-6 6 UCSP-6 TOP MARK AAI AAJ AAK Pin Configurations/Functional Diagrams/Truth Table TOP VIEW V+ B1 A1 NO V+ B1 A1 NC V+ B1 A1 NO SWITCHES SHOWN FOR LOGIC "0" IN B2 A2 I.C. IN B2 A2 I.C. IN B2 A2 COM MAX4686/MAX4687/MAX4688 GND B3 A3 COM GND B3 A3 COM GND B3 A3 NC MAX4686 SPST NO MAX4687 SPST NC IN NO 0 OFF ON 1 ON OFF NC MAX4688 SPDT Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd. UCSP is a trademark of Maxim Integrated Products, Inc. ________________________________________________________________ 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 MAX4686/MAX4687/MAX4688 General Description The MAX4686/MAX4687/MAX4688 low on-resistance (RON), low-voltage analog switches operate from a single +1.8V to +5.5V supply. The MAX4686/MAX4687 are single-pole/single-throw (SPST) analog switches, and the MAX4688 is a single-pole/double-throw (SPDT) analog switch. The MAX4686 is a normally open (NO) switch, and the MAX4687 is a normally closed (NC) switch. The MAX4688 has one normally open (NO) switch and one normally closed (NC) switch. When powered from a 3V supply these devices feature 2.5Ω (max) RON, with 0.4Ω (max) RON matching and 1Ω (max) flatness. The MAX4686/MAX4687/MAX4688 offer fast switching speeds (tON = 30ns max, tOFF = 12ns max). The MAX4688 offers break-before-make action. The digital logic inputs are 1.8V logic compatible from a +2.7V to +3.3V supply. The MAX4686/MAX4687/ MAX4688 are available in the chip-scale package (UCSP™), significantly reducing the required PC board area. The chip occupies only a 1.50mm x 1.02mm area. The 3 x 2 array of solder bumps are spaced with a 0.5mm bump pitch. MAX4686/MAX4687/MAX4688 2.5Ω, Low-Voltage, SPST/SPDT Analog Switches in UCSP Package ABSOLUTE MAXIMUM RATINGS All Voltages Referenced to GND V+, IN .......................................................................-0.3V to +6V COM, NO, NC (Note1)..................................-0.3V to (V+ + 0.3V) Continuous Current NO, NC, COM ................................±100mA Peak Current NO, NC, COM (pulsed at 1ms, 10% duty cycle) ...............................±200mA Continuous Power Dissipation (TA = +70°C) 3 x 2 UCSP (derate 10.1mW/°C at +70°C) ..................808mW Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range ............................-65°C to +150°C Bump Reflow Temperature .............................................+235°C Note 1: Signals on NO, NC, and COM exceeding V+ are clamped by an internal diode. Limit forward-diode current to maximum current rating. Note 2: This device is constructed using a unique set of packaging techniques that impose a limit on the thermal profile the device can be exposed to during board level solder attach and rework. This limit permits only the use of the solder profiles recommended in the industry standard specification, JEDEC 020A, paragraph 7.6, Table 3 for IR/VPR and convection reflow. Preheating is requied. Hand or wave soldering is not allowed. 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 (V+ = +2.7V to +3.3V, VIH = +1.4V, VIL = 0.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at 3V and TA = +25°C.) (Notes 3, 4) PARAMETER SYMBOL CONDITIONS TA MIN TMIN to TMAX 0 TYP MAX UNITS V+ V ANALOG SWITCH Analog Signal Range VCOM, VNO, VNC +25°C On-Resistance On-Resistance Match Between Channels (MAX4688 only) (Note 5) RON V+ = 2.7V, VNC = 0 to V+, ICOM = 10mA 1.5 TMIN to TMAX 3.5 +25°C ∆RON V+ = 2.7V, VNO or VNC = 1.5V, ICOM = 10mA 0.3 RFLAT(ON) V+ = 2.7V, VNO or VNC = 0 to V+, ICOM = 10mA NO, NC Off-Leakage Current (Note 7) INO(OFF), INC(OFF) V+ = 3.3V; VCOM = 0.3V or 3V; VNO or VNC = 3V, 0.3V COM Off-Leakage Current (Note 7) ICOM_(OFF) V+ = 3.3V; VCOM = 0.3V or 3V; VNO or VNC = 3V, 0.3V COM On-Leakage Current (Note 7) ICOM_(ON) V+ = 3.3V; VCOM = 3V or 0.3V; VNO or VNC = 3V, 0.3V, or floating Ω 0.4 Ω TMIN to TMAX 0.5 +25°C On-Resistance Flatness (Note 6) 2.5 0.5 TMIN to TMAX 1 1 +25°C -0.5 TMIN to TMAX -1 +25°C -0.5 TMIN to TMAX -1 +25°C -0.5 TMIN to TMAX -1 ±0.01 +0.5 1 ±0.01 nA 0.5 1 ±0.01 Ω nA 0.5 1 nA DYNAMIC CHARACTERISTICS +25°C Turn-On Time (Note 7) 2 tON VNO or VNC = 1.5V, Figure 2 20 TMIN to TMAX _______________________________________________________________________________________ 30 35 ns 2.5Ω, Low-Voltage, SPST/SPDT Analog Switches in UCSP Package (V+ = +2.7V to +3.3V, VIH = +1.4V, VIL = 0.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at 3V and TA = +25°C.) (Notes 3, 4) PARAMETER SYMBOL CONDITIONS TA MIN +25°C Turn-Off Time (Note 7) tOFF VNO or VNC = 1.5V, Figure 2 TMIN to TMAX Break-Before-Make (MAX4688 only) (Note 7) tBBM VNO, VNC = 1.5V, Figure 3 TMIN to TMAX TYP MAX 10 12 15 +25°C UNITS ns 8 ns 2 VGEN = 0, RGEN = 0, CL = 1.0nF, Figure 4 +25°C 40 pC BW Signal = 0dBm, 50Ω in and out, Figure 5 +25°C 200 MHz Off-Isolation (Note 8) VISO CL = 5pF, RL = 50Ω, f = 100kHz, Figure 5 +25°C -90 dB Crosstalk (MAX4688 only) (Note 9) VCR CL = 5pF, RL = 50Ω, f = 100kHz, Figure 5 +25°C -95 dB Total Harmonic Distortion THD RL = 600Ω, 2Vp-p, f = 20Hz to 20kHz +25°C 0.06 % Charge Injection Q On-Channel -3dB Bandwidth NO, NC OffCapacitance CNO(OFF), CNC(OFF) f = 1MHz, Figure 6 +25°C 12 pF COM Off-Capacitance CCOM(OFF) f = 1MHz, Figure 6 +25°C 12 pF C(ON) f = 1MHz, Figure 6 +25°C 35 pF Switch On-Capacitance DIGITAL I/O Input Logic High VIH TMIN to TMAX Input Logic Low VIL TMIN to TMAX Logic Input Leakage Current IIH, IIL VIN = 0 or V+ 1.4 V 0.5 V TMIN to TMAX -1 1 µA TMIN to TMAX 1.8 5.5 V TMIN to TMAX -1 1 µA POWER SUPPLY Power-Supply Range V+ Supply Current I+ V+ = 3.3V, VIN = 0 or V+ Note 3: The algebraic convention, where the most negative value is a minimum and the most positive value a maximum, is used in this data sheet. Note 4: UCSP parts are 100% tested at +25°C only and guaranteed by correlation at the full hot-rated temperature. Note 5: ∆RON = RON(MAX) - RON(MIN), between switches. 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: Guaranteed by design. Note 8: Off Isolation = 20log10 (VCOM / VNO), VCOM = output, VNO = input to off switch. Note 9: Between switches. _______________________________________________________________________________________ 3 MAX4686/MAX4687/MAX4688 ELECTRICAL CHARACTERISTICS (continued) Typical Operating Characteristics (TA = +25°C, unless otherwise noted.) ON-RESISTANCE vs. VCOM (V+ = +3V) V+ = +1.8V 3.5 8 3.0 MAX4686/7/8 toc02 MAX4686/7/8 toc01 10 TA = +85°C 2.5 6 V+ = +2.7V 2.5 4 2.0 2 1.5 0 1.0 RON (Ω) 3.0 RON (Ω) SUPPLY CURRENT (pA) ON-RESISTANCE vs. VCOM 4.0 V+ = +3.3V MAX4686/7/8 toc03 SUPPLY CURRENT vs. SUPPLY VOLTAGE 12 TA = +25°C 2.0 1.5 TA = -40°C 1.0 V+ = +5V 2 3 4 5 6 1 2 3 4 VCOM (V) ON-RESISTANCE vs. VCOM (V+ = +5V) LOGIC THRESHOLD VOLTAGE vs. SUPPLY VOLTAGE TA = +85°C 1.9 1.7 TA = +25°C 1.5 1.3 1.1 TA = -40°C 0.9 2.0 2.5 3.0 VIN RISING 1.5 30 25 1.0 VIN FALLING 20 tON 15 tOFF 10 0.5 5 0 0 1 2 3 4 0 1.5 5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 V+ (V) TURN-ON/OFF TIME vs. TEMPERATURE ON/OFF-LEAKAGE CURRENT vs. TEMPERATURE 12 tON 9 tOFF 6 3 0 V+ = +3V 100 -15 10 35 TEMPERATURE (°C) 60 85 3 4 5 6 CHARGE INJECTION vs. VCOM 80 V+ = +5V 60 ICOMON 10 INOOFF, INCOFF 1 V+ = +3V 40 20 0.1 -40 2 V+ (V) Q (pC) 15 1 MAX4686/7/8 toc08 V+ = +3V 1000 ON/OFF-LEAKAGE CURRENT (pA) MAX4686/7/8 toc07 VCOM (V) 5.5 MAX4686/7/8 toc09 0.5 4 1.5 TURN-ON/OFF TIME vs. SUPPLY VOLTAGE 0.7 18 1.0 35 MAX4686/7/8 toc05 2.1 0.5 VCOM (V) 2.0 LOGIC THRESHOLD VOLTAGE (V) MAX4686/7/8 toc04 2.3 0 5 SUPPLY VOLTAGE (V) 2.5 RON (Ω) 0.5 0 MAX4686/7/8 toc06 1 tON/OFF (ns) 0 tON/OFF (ns) MAX4686/MAX4687/MAX4688 2.5Ω, Low-Voltage, SPST/SPDT Analog Switches in UCSP Package 0 -40 -15 10 35 TEMPERATURE (°C) 60 85 0 1 2 VCOM (V) _______________________________________________________________________________________ 3 4 5 2.5Ω, Low-Voltage, SPST/SPDT Analog Switches in UCSP Package TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY FREQUENCY RESPONSE ON-RESPONSE -20 MAX4686/7/8 toc11 1 MAX4686/7/8 toc10 0 OFF-ISOLATION THD + N (%) LOSS (dB) -40 -60 0.1 -80 CROSSTALK -100 0.01 -120 0.01 0.1 1 10 10 100 100 10k 1k 100k FREQUENCY (Hz) FREQUENCY (MHz) Pin Description BUMP MAX4686 MAX4687 MAX4688 B1 B1 B1 NAME FUNCTION V+ Positive Supply Voltage Input Digital Control Input B2 B2 B2 IN B3 B3 B3 GND — A1 A3 NC A3 A3 A2 COM A1 — A1 NO Analog Switch, Normally Open Terminal A2 A2 — I.C. Internally Connected Ground Analog Switch, Normally Closed Terminal Analog Switch, Common Terminal Applications Information POSITIVE SUPPLY Logic Inputs D1 V+ MAX4686 MAX4687 MAX4688 NO COM Where the MAX4686/MAX4687/MAX4688 have a +3.3V supply, IN may be driven low to GND and driven high to 5.5V. Driving IN rail-to-rail minimizes power consumption. Logic inputs accept up to +5.5V regardless of supply voltage. Analog Signal Levels Vg GND Figure 1. Overvoltage Protection Using External Blocking Diodes Analog signals that range over the entire supply voltage (V+ to GND) are passed with very little change in R ON (see Typical Operating Characteristics). The switches are bidirectional, so the NO, NC, and COM pins are both inputs or outputs. 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 devices. _______________________________________________________________________________________ 5 MAX4686/MAX4687/MAX4688 Typical Operating Characteristics (continued) (TA = +25°C, unless otherwise noted.) MAX4686/MAX4687/MAX4688 2.5Ω, Low-Voltage, SPST/SPDT Analog Switches in UCSP Package Proper power-supply sequencing is recommended for all CMOS devices. Always apply V+ before applying analog signals, especially if the analog signal is not current limited. If this sequencing is not possible, and if the analog inputs are not current limited to <20mA, add a small-signal diode (D1) as shown in Figure 1. Adding a protection diode reduces the analog range to a diode drop (about 0.7V) below V+ (for D1). RON increases slightly at low supply voltages. Maximum supply voltage (V+) must not exceed +6V.Protection diode D1 also protects against some overvoltage situations. No damage will result on Figure 1’s circuit if the supply voltage is below the absolute maximum rating and if a fault voltage up to the absolute maximum rating is applied to an analog signal pin. UCSP Package Consideration For general UCSP package information and PC layout considerations, please refer to the Maxim Application Note (Wafer-Level Ultra-Chip-Board-Scale Package). UCSP Reliability The chip-scale package (UCSP) represents a unique packaging form factor that may not perform equally to a packaged product through traditional mechanical reliability tests. CSP reliability is integrally linked to the user’s assembly methods, circuit board material, and usage environment. The user should closely review these areas when considering use of a CSP package. Performance through Operating Life Test and Moisture Resistance remains uncompromised as it is primarily determined by the wafer-fabrication process. Mechanical stress performance is a greater consideration for a CSP package. CSPs are attached through direct solder contact to the user’s PC board, foregoing the inherent stress relief of a packaged product lead frame. Solder joint contact integrity must be considered. Information on Maxim’s qualification plan, test data, and recommendations are detailed in the UCSP application note, which can be found on Maxim’s website at www.maxim-ic.com. Test Circuits/Timing Diagrams MAX4686 MAX4687 MAX4688 V+ V+ COM_ NO_ OR NC VIN_ LOGIC INPUT 50% 0 VOUT RL 50Ω CL 35pF t OFF IN_ VOUT GND LOGIC INPUT SWITCH OUTPUT ( 0.9 x V0UT 0.9 x VOUT 0 t ON CL INCLUDES FIXTURE AND STRAY CAPACITANCE. RL RL + RON VOUT = VN_ t r < 5ns t f < 5ns V+ LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES THAT HAVE THE OPPOSITE LOGIC SENSE. ) Figure 2. Switching Time V+ MAX4688 LOGIC INPUT V+ VN_ 50% tr < 5ns tf < 5ns 0 NC_ VOUT COM_ NO_ RL 300Ω IN_ LOGIC INPUT V+ CL 35pF GND 0.9 x VOUT VOUT tD CL INCLUDES FIXTURE AND STRAY CAPACITANCE. Figure 3. Break-Before-Make Interval (MAX4688 only) 6 _______________________________________________________________________________________ 2.5Ω, Low-Voltage, SPST/SPDT Analog Switches in UCSP Package V+ MAX4686 MAX4687 MAX4688 ∆VOUT V+ RGEN VOUT COM_ NC_ OR NO_ VOUT IN OFF CL V GEN GND OFF ON IN_ OFF IN VIL TO VIH ON OFF Q = (∆V OUT )(C L ) IN DEPENDS ON SWITCH CONFIGURATION; INPUT POLARITY DETERMINED BY SENSE OF SWITCH. Figure 4. Charge Injection +5V 10nF V OFF-ISOLATION = 20log OUT VIN NETWORK ANALYZER 0V OR V+ V+ IN_ NC_ 50Ω MAX4686 MAX4687 MAX4688 50Ω VIN COM V ON-LOSS = 20log OUT VIN 50Ω CROSSTALK = 20log VOUT NO GND MEAS REF 50Ω VOUT VIN 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 5. Off-Isolation/On-Channel Bandwidth, Crosstalk 10nF Chip Information V+ TRANSISTOR COUNT: 150 V+ COM_ MAX4686 MAX4687 MAX4688 IN CAPACITANCE METER f = 1MHz NC_ or NO_ VIL OR VIH GND Figure 6. Channel Off/On-Capacitance _______________________________________________________________________________________ 7 MAX4686/MAX4687/MAX4688 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. 6L, UCSP.EPS MAX4686/MAX4687/MAX4688 2.5Ω, Low-Voltage, SPST/SPDT Analog Switches in UCSP Package 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. 8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
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