19-1006; Rev 3; 2/11 Ultra-Low Leakage Monolithic CMOS Analog Multiplexers The MAX328/MA329 are monolithic CMOS analog multiplexers. The MAX328 is a single-ended, 1-of-8 device, and the MAX329 is a differential, 2-of-8 device. Designed to provide the lowest possible on- and offleakages, these multiplexers switch signals from high source impedance, providing the mux operates into a high-input-impedance op amp or A/D converter. The MAX328/MAX329 are pin-for-pin replacements for the popular DG508/DG509 in these applications. Adding an external 40k resistor to each input makes the MAX328/MAX329 an excellent fault-tolerant multiplexer. Low leakage (less than 1pA at +25C) and 2.5k on-resistance allow the circuit to sustain 110V AC faults indefinitely while maintaining an error of less than 40nV for normal signals (i.e., 1pA times 40k). The MAX328/MAX329 work equally well with a single supply of 10V to 30V or dual supplies of 5V to 18V. They also perform well with unbalanced combinations of supply voltage, such as +12V and -5V or +5V and -15V. Low power dissipation (1.9mW with 15V supplies) allows use in portable applications. Applications Features o Ultra-Low Off- and On-Leakage: 1pA Typ o Bidirectional Operation (Use as Mux or Demux) o TTL and CMOS Logic Compatibility o Analog-Signal Range Includes Power-Supply Rails o Switching Speeds Less Than 1.5s o Pin Compatible with DG508/DG509 and MAX358/MAX359 o Latchup Proof Construction Ordering Information PART TEMP RANGE PIN-PACKAGE MAX328CPE+ 0C to +70C 16 Plastic DIP MAX328CWE+ 0C to +70C 16 Wide SO MAX328CJE 0C to +70C 16 CERDIP MAX328C/D 0C to +70C Dice* MAX328ETE+ -40C to +85C 16 TQFN-EP** MAX328EPE+ -40C to +85C 16 Plastic DIP MAX328EWE+ -40C to +85C 16 Wide SO MAX328EJE -40C to +85C 16 CERDIP*** MAX328MJE -55C to +125C 16 CERDIP*** +Denotes a lead(Pb)-free/RoHS-compliant package. *Contact factory for dice specifications. **EP = Exposed pad. ***Contact factory for availability. Substrate may be allowed to be unconnected or be connected to V+. Ordering Information continued at end of data sheet. Control Systems Data Logging Systems Aircraft Heads-Up Displays Data-Acquisition Systems Signal Routing Typical Operating Circuit Pin Configurations 1-OF-8 CHANNEL SEQUENTIAL MUX WITH 120V AC FAULT CAPABILITY +15V 40k 1/2W ANALOG INPUT V+ -15V GND +15V 40k 1/2W ANALOG INPUT V+ N.C. BIN DM7493 AIN V02 i BIAS < 1pA A1 A2 EN OUT A0 1 + 16 A1 A0 1 EN 2 15 A2 EN 2 V- 3 14 GND V- 3 S1 4 MAX328 13 V+ S1A 4 + 16 A1 15 GND 14 V+ MAX329 13 S1B QB S2 5 12 S5 S2A 5 12 S2B QC S3 6 11 S6 S3A 6 11 S3B QO S4 7 10 S7 S4A 7 10 S4B QA V01 D S8 A0 CLK IN OP AMP S1 MAX328 TOP VIEW V- N.C. D 8 9 S8 DA 8 9 DB GND DIP/SO DIP/SO +15V EN IN Pin Configurations continued at end of data sheet. (MUX ON/OFF CONTROL) ________________________________________________________________ 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 MAX328/MAX329 General Description MAX328/MAX329 Ultra-Low Leakage Monolithic CMOS Analog Multiplexers ABSOLUTE MAXIMUM RATINGS Voltage Referenced to VV+ ........................................................................................+44V GND .....................................................................................+25V Digital Inputs (Note 1), VS, VD ............................-2V to (V+ + 2V) Current (Any Terminal, Except S or D)................................30mA Continuous Current, S or D (pulsed at 1ms, 10% duty cycle max)..............................40mA Operating Temperature Range MAX328/329 C _ _................................................0C to +70C MAX328/329 E _ _ .............................................-40C to +85C MAX328/329 M _ _ ..........................................-55C to +125C Power Dissipation (Package) (Note 1) CERDIP (derate 10mW/C above +70C) .....................800mW PDIP (derate 10.5mW/C above +70C) ....................842.1mW Wide SO (derate 14.3mW/C above +70C) ............1142.9mW TQFN (derate 33.3mW/C above +70C) .................2666.7mw Storage Temperature.........................................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C Soldering Temperature (reflow) Lead(Pb)-free packages (PDIP, TQFN, Wide SO) ........+260C Packages containing lead(Pb) (CERDIP, PDIP, Wide SO)..+240C Packages containing lead(Pb) (TQFN) .........................+260C Note 1: All leads soldered or welded to PC board. 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+ = 15V, V- = -15V, VGND = 0V, TA = +25C, unless otherwise noted.) (Note 2) PARAMETER SYMBOL MAX328M MAX329M CONDITIONS MIN TYP MAX328C/E MAX329C/E MAX MIN +15 -15 TYP UNITS MAX SWITCH Analog Signal Range Drain-Source On-Resistance VANALOG RDS(ON) Greatest Change in Drain-Source OnResistance Between Channels RDS(ON) Source Off-Leakage Current (Note 3) I S(OFF) Drain OffLeakage Current (Note 3) Drain OnLeakage Current (Note 3) 2 MAX328 ID(OFF) MAX329 MAX328 ID(ON) MAX329 -15 VD = 10V, I S = 100A VD = -10V, I S = 100A Seq. each switch on, VAL = 0.8V, VAH = 2.4V RDS(ON) = RDS(ON) Max - RDS(ON) Min ( ) RDS(ON) Ave VS = 10V, VD = -10V VS = -10V, VD = 10V VD = 10V, VS = -10V VD = -10V, VS = 10V VD = 10V, VS = -10V VEN = 0V VEN = 0V +15 1.5 2.5 1.5 3.5 1.0 2.5 1.0 3.5 k 2 2 % 0.1 10 0.1 10 0.3 10 0.3 10 0.3 10 0.3 10 1.0 10 1.0 10 0.3 10 0.3 10 VD = -10V, VS = 10V 0.5 10 0.5 10 VS (all) = VD = 10V 3.0 10 3.0 10 2.0 10 2.0 10 1.5 10 1.5 10 1.0 10 1.0 10 VS (all) = VD = -10V VS (all) = VD = 10V VS (all) = VD = -10V Seq. each switch on, VAL = 0.8V, VAH = 2.4V V _______________________________________________________________________________________ pA pA pA Ultra-Low Leakage Monolithic CMOS Analog Multiplexers (V+ = 15V, V- = -15V, VGND = 0V, TA = +25C, unless otherwise noted.) (Note 2) PARAMETER SYMBOL MAX328M MAX329M CONDITIONS MIN MAX328C/E MAX329C/E TYP MAX VA = 2.4V 0.001 VA = 15V 0.001 MIN UNITS TYP MAX 1 0.001 1 1 0.001 1 INPUT Address Input Current, Input Voltage High IAH Address Input Current, Input Voltage Low IAL VEN = 2.4V VEN = 0V All VA = 0V 0.001 1 0.001 1 0.001 1 0.001 1 A A DYNAMIC Switching Time of Multiplexer tTRANSITION Figure 1 Break-Before-Make Interval 1.0 1.5 t OPEN Figure 2 Enable Turn-On Time t ON(EN) Figure 3 1.0 1.5 s Enable Turn-Off Time t OFF(EN) Figure 3 0.7 1.0 s Off-Isolation OIRR 0.2 VEN = 0V, RL = 1k, CL = 15pF, VS = 7VRMS, f = 500kHz 84 dB 1.8 1.8 pF 8.0 8.0 4.0 4.0 VA = 10V 1 1 VA = 0V 2 VA = -10V 4 CS(OFF) VS = 0V VEN = 0V, f = 1MHz MAX328 Drain OffCapacitance MAX329 CD(OFF) VD = 0V VEN = 0V, f = 1MHz Q(INJ) s 84 Source Off-Capacitance Charge Injection (Note 4) 0.2 s 5 2 pF 5 pc 4 SUPPLY Positive Supply Current I+ VEN = 2.4V VA = 0V/5V 4.5 200 4.5 200 A Negative Supply Current I- VEN = 2.4V VA = 0V/5V 1 -100 1 -100 A Power-Supply Range for Continuous Operation (Note 7) VOP 18 V 5 18 5 _______________________________________________________________________________________ 3 MAX328/MAX329 ELECTRICAL CHARACTERISTICS (continued) MAX328/MAX329 Ultra-Low Leakage Monolithic CMOS Analog Multiplexers ELECTRICAL CHARACTERISTICS (Overtemperature) (V+ = 15V, V- = -15V, VGND = 0V, TA = TMIN to TMAX, unless otherwise noted.) (Note 2) PARAMETER SYMBOL MAX328M MAX329M TEST CONDITIONS MIN TYP MAX328C/E MAX329C/E MAX MIN +15 -15 TYP UNITS MAX SWITCH Analog-Signal Range Drain-Source On-Resistance Source Off-Leakage Current (Note 6) Drain OffLeakage Current (Note 6) Drain OnLeakage Current (Note 6) VANALOG RDS(ON) I S(OFF) -15 VD = 10V, I S = 100A VD = -10V, I S = 100A VS = 10V, VD = -10V VS = -10V, VD = 10V Seq. each switch on, VAL = 0.8V, VAH = 2.4V 2.2 ID(OFF) MAX329 VD = -10V, VS = 10V VD = 10V, VS = -10V 1.5 VEN = 0V VEN = 0V VD = -10V, VS = 10V VS (all) = VD = 10V MAX328 ID(ON) MAX329 VS (all) = VD = -10V VS (all) = VD = 10V VS (all) = VD = -10V 1.9 V 5 k VD = 10V, VS = -10V MAX328 4 +15 Seq. each switch on, VAL = 0.8V, VAH = 2.4V 4 1.2 5 5 5 5 5 20 20 20 20 10 10 10 10 20 20 20 20 10 10 10 10 nA nA nA INPUT Address Input Current, Input Voltage High IAH Address Input Current, Input Voltage Low IAL VA = 2.4V 0.01 1 0.01 1 VA = 15V 0.01 1 0.01 1 VEN = 2.4V VEN = 0V All VA = 0V 0.01 1 0.01 1 0.01 1 0.01 1 A A Note 2: Typical values are for design aid only; not guaranteed or subject to production testing. Note 3: All leakage parameters are 100% tested at maximum rated operating temperature, i.e., +70C, +85C, +125C, and guaranteed by correlation at +25C. Note 4: Guaranteed by design. Note 5: Electrical characteristics, such as On-Resistance, change when power supplies other than 15V are used. Power-supply range is a design characteristic, not production tested. Note 6: Leakage parameters are 100% tested at maximum rated operating temperature, i.e., +70C, etc. 4 _______________________________________________________________________________________ Ultra-Low Leakage Monolithic CMOS Analog Multiplexers RDS(ON) vs. ANALOG INPUT FOR DUAL SUPPLIES 5V SUPPLIES 6 WITH +15V SUPPLY 4 RDS(ON) (k) RDS(ON) (k) 7 5 5 4 MAX328/MAX329 toc02 8 MAX328/MAX329 toc01 9 RDS(ON) vs. ANALOG INPUT FOR SINGLE SUPPLY 3 2 3 2 1 1 15V SUPPLIES 0 0 -5 0 5 10 0 15 5 15 10 ANALOG INPUT (V) IS(OFF) vs. TEMPERATURE ID(ON), ID(OFF) vs. TEMPERATURE V+ = 15V V- = 15V 1.0 100 0.1 0.01 MAX328/MAX329 toc04 ANALOG INPUT (V) LEAKAGE (nA) LEAKAGE (nA) 10.0 -10 MAX328/MAX329 toc03 -15 V+ = 15V V- = 15V 10 1.0 0.1 MAX328/ MAX329 0.001 0.0001 MAX328 0.01 0.001 -55 -35 -15 5 25 45 65 TEMPERATURE (C) 85 105 125 -55 -35 -15 5 25 45 65 85 105 125 TEMPERATURE (C) _______________________________________________________________________________________ 5 MAX328/MAX329 Typical Operating Characteristics (TA = +25C, unless otherwise noted.) Ultra-Low Leakage Monolithic CMOS Analog Multiplexers MAX328/MAX329 Pin Description PIN MAX328 NAME MAX329 DIP/SO TQFN-EP TQFN-EP 1, 15, 16 15, 14, 13 -- -- A0, A2, A1 Address Input -- -- 1, 16 15, 14 A0, A1 Address Input 2 16 2 16 EN Enable Negative-Supply Voltage Input 3 1 3 1 V- 4-7 2-5 -- -- S1-S4 Analog Inputs--Bidirectional -- -- 4-7 2-5 S1A-S4A Analog Inputs--Bidirectional 8 6 -- -- D Analog Outputs--Bidirectional -- -- 8, 9 6, 7 DA, DB Analog Outputs--Bidirectional 9-12 7-10 -- -- S8-S5 Analog Inputs--Bidirectional -- -- 10-13 8-11 S4B-S1B Analog Inputs--Bidirectional 13 11 14 12 V+ Positive-Supply Voltage Input 14 12 15 13 GND -- -- -- -- EP Ground Exposed pad. Connect EP to V+. (TQFN only). Truth Table--MAX329 Truth Table--MAX328 6 FUNCTION DIP/SO A2 A1 A0 EN ON SWITCH A1 A0 EN ON SWITCH X X X 0 None X X 0 None 0 0 0 1 1 0 0 1 1 0 0 1 1 2 0 1 1 2 0 1 0 1 3 1 0 1 3 0 1 1 1 4 1 1 1 4 1 0 0 1 5 1 0 1 1 6 1 1 0 1 7 1 1 1 1 8 Note: Logic "0" = VAL 0.8V, Logic "1" = VAH 2.4V _______________________________________________________________________________________ Ultra-Low Leakage Monolithic CMOS Analog Multiplexers MAX328/MAX329 VAH = 3.0V A2 50% MAX328 ADDRESS DRIVE (VA) 0V VA A1 50 +10V 10V S1 S2 S2-S7 OUTPUT A A0 S8 EN OUT +VAH GND 10V 10M PROBE 14pF 90% -10V tA Figure 1. Access Time vs. Logic Level (High) VAH = 3.0V A2 ADDRESS DRIVE (VA) 0V VA S2-S7 A1 A0 50 OUTPUT EN 2.4V 50% +5V S1 MAX328 S8 GND VOUT OUT 50% 1k 12.5pF tOPEN Figure 2. Break-Before-Make Delay (tOPEN) VAH = 3.0V 50% A1 EN OUTPUT 90% MAX328 S2-S7 A0 0V 90% +10V S1 A2 ENABLE DRIVE VA GND OUT 1k 12.5pF 50 tON(EN) tOFF(EN) Figure 3. Enable Delay (tON(EN), tOFF(EN)) _______________________________________________________________________________________ 7 Applications Information Figure 4 is a typical circuit for converting the MAX328/MAX329 into a fault-tolerant mux. In this application, the internal diodes limit the voltage at the MAX328 input to 15.7V (15V supplies). No external diodes need to be added with the MAX328/MAX329, unlike conventional multiplexers requiring external diodes. The resistors, R, need to be 39k or higher to limit the power dissipation in the resistor when a 120V AC fault occurs (i.e., power dissipation is (120-16) 2/39k or 0.28W. This is why a 1/2/W resistor is needed). The circuit withstands an indefinite fault to a 120V AC line with no damage to any component. In addition to allowing fault-protection, the guaranteed low leakage of the MAX328/MAX329 also reduces signal errors. The circuit in Figure 4 produces an error voltage of 10pA (max leakage) x 39k or 0.39V at room temperature and 39V at +125C. Therefore, for 10V signals, the MAX328/MAX329 allows 17-bit resolution (38V = 1LSB) over the full temperature range. -15V 1F A0 1 16 A1 EN 2 15 A2 14 3 MAX328 +15V 1F 13 R S1 4 R R S2 S5 12 5 R R S3 6 S6 11 R R S4 7 S7 10 R D 8 S8 9 R = 39k 1/2W Figure 4. Fault-Tolerant Mux (indefinitely withstands 120V AC fault voltages) Functional Diagrams V+ S1A 10 S5 9 S6 A1 GND 14 13 2 11 S1B S2A 3 10 S2B S3A 4 9 S3B 7 8 5 S8 S7 S4A 8 6 D 5 V+ S4B 4 12 LOGIC 7 S3 A0 A2 13 3 15 A1 14 S2 EN A0 15 11 16 EN 2 MAX328 8 1 GND DB S1 V- 12 LOGIC 6 1 DA V- 16 TOP VIEW S4 MAX328/MAX329 Ultra-Low Leakage Monolithic CMOS Analog Multiplexers MAX329 _______________________________________________________________________________________ Ultra-Low Leakage Monolithic CMOS Analog Multiplexers A1 14 S4 8 S4B 7 DB TQFN TOP VIEW Package Information For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. 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. PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO. 16 CERDIP J16+3 21-0045 -- 16 PDIP P16+2 21-0043 -- 16 TQFN-EP T1655+3 21-0140 90-0073 16 Wide SO W16+2 21-0042 90-0107 S3 + +Denotes a lead(Pb)-free/RoHS-compliant package. *Contact factory for dice specifications. **EP = Exposed pad. ***Contact factory for availability. Substrate may be allowed to be unconnected or be connected to V+. 4 5 GND 13 A1 14 S3B 16 CERDIP*** 16 9 -55C to +125C EN MAX329 A0 15 6 DA EN 16 5 S4A + 4 MAX329MJE D S3A 16 CERDIP*** S8 6 3 -40C to +85C 7 15 S2 MAX329EJE S7 A0 S2B 16 Wide SO 10 -40C to +85C 3 MAX329EWE+ 8 MAX328 S2A 16 Plastic DIP 2 -40C to +85C S1 MAX329EPE+ S1B 16 TQFN-EP** 11 -40C to +85C 2 MAX329ETE+ S6 13 9 A2 S5 Dice* 10 16 CERDIP 0C to +70C V+ 0C to +70C MAX329C/D 11 MAX329CJE S1A 16 Wide SO GND 0C to +70C 12 MAX329CWE+ TOP VIEW 1 16 Plastic DIP V- 0C to +70C V+ MAX329CPE+ 12 PIN-PACKAGE 1 TEMP RANGE V- PART Pin Configurations (continued) TQFN _______________________________________________________________________________________ 9 MAX328/MAX329 Ordering Information (continued) MAX328/MAX329 Ultra-Low Leakage Monolithic CMOS Analog Multiplexers Revision History REVISION NUMBER REVISION DATE 3 2/11 DESCRIPTION Updated the Ordering Information table to reflect lead-free parts and corrected part numbers and package types PAGES CHANGED 1, 9 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 (c) 2011 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.