19-1396; Rev 0; 10/98 High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers The MAX4578/MAX4579 are high-voltage, 8-channel CMOS multiplexers. The MAX4578 and dual 4-channel MAX4579 are ideal for precision ADC calibration and system self-monitoring applications. These calibration multiplexers (cal-muxes) have precision resistordividers to generate accurate voltage ratios from an input reference voltage. The reference ratios include 15/4096 and 4081/4096 of the external reference voltage, accurate to 15 bits, and 1/2(V+) and 5/8(V+ - V-), accurate to 8 bits. The external reference voltage as well as ground can also be switched to the output. The MAX4578/MAX4579 have enable inputs and address latching. All digital inputs have 0.8V and 2.4V logic thresholds, ensuring both TTL- and CMOS-logic compatibility when using a single +12V or dual 15V supplies. Protection diodes at all inputs provide >2kV ESD rating. The MAX4578/MAX4579 operate from a single +4.5V to +36V supply or from dual supplies of 4.5V to 20V. On-resistance (350 max) is matched between switches to 15 max. Each switch can handle Rail-to-Rail(R) analog signals. The off-leakage current is 20pA at TA = +25C and 1.25nA at TA = +85C. The MAX4578/MAX4579 are available in small 20-pin SSOP, SO, and DIP packages. Features On-Chip Gain and Offset Divider Networks Provide 15-Bit Accurate Output Ratios On-Chip V+ to GND and V+ to V- Divider Networks Provide 8-Bit Accurate Output Ratios 350 (max) RON 12 (max) RON Matching Between Channels 10pC (max) Charge Injection Guaranteed 20pA Off-Leakage Current Rail-to-Rail Signal Handling Small 20-Pin SSOP, SO, DIP Packages Ordering Information PART TEMP. RANGE MAX4578CAP 0C to +70C 20 SSOP PIN-PACKAGE MAX4578CWP 0C to +70C 20 Wide SO MAX4578CPP 0C to +70C 20 Plastic DIP MAX4578EAP -40C to +85C 20 SSOP MAX4578EWP -40C to +85C 20 Wide SO MAX4578EPP -40C to +85C 20 Plastic DIP Ordering Information continued at end of data sheet. Pin Configurations/ Functional Diagrams Applications Data-Acquisition Systems Test Equipment Avionics Audio Signal Routing Networking V+ GND VREFHI 1 2 3 4 LOGIC DECODER 20 19 18 17 16 LATCH EN CAL A0 A1 15R 4081R 4081R REFLO COMA NO1A NO2A NO3A NO4A Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd. MAX4579 15R 5 15 6 7 14 8 13 12 9 10 11 COMB NO4B NO3B NO2B NO1B MAX4578 appears at end of data sheet. ________________________________________________________________ Maxim Integrated Products 1 For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. MAX4578/MAX4579 General Description MAX4578/MAX4579 High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers ABSOLUTE MAXIMUM RATINGS (Voltage Referenced to GND) V+ ...........................................................................-0.3V to +44V V- ............................................................................-44V to +0.3V V+ to V-...................................................................-0.3V to +44V CAL, LATCH A_, EN, NO_, COM_, REFHI, REFLO (Note 1) ................................(V- - 0.3V) to (V+ + 0.3V) Continuous Current (any terminal)....................................30mA Peak Current, NO_ or COM_ (pulsed at 1ms, 10% duty cycle max) .........................100mA Continuous Power Dissipation (TA = +70C) SSOP (derate 8mW/C above +70C) ..........................640mW Wide SO (derate 8mW/C above +70C)......................800mW Plastic DIP (derate 10.53mW/C above +70C) ...........842mW Operating Temperature Ranges MAX4578C_P/MAX4579C_P................................0C to +70C MAX4578E_P/MAX4579E_P .............................-40C to +85C Storage Temperature Range .............................-65C to +160C Lead Temperature (soldering, 10sec) .............................+300C Note 1: Signals on NO_, COM_, EN, LATCH, CAL, A_ exceeding V+ or V- are clamped by internal diodes. Limit forward current to maximum current ratings. 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--Dual 15V Supplies (V+ = +15V 10%, V- = -15V 10%, logic levels = 2.4V and 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2) -0.05PARAMETER 0.005 0.05 SYMBOL CONDITIONS MIN TYP MAX UNITS V+ V SWITCH Analog Signal Range VCOM_, VNO_ (Note 3) On-Resistance RDS(ON) ICOM_ = 0.2mA, VNO_ = 10V, V+ = 13.5V, V- = -13.5V TA = +25C On-Resistance Matching Between Channels (Note 4) RON ICOM_ = 0.2mA, VNO_ = 10V, V+ = 13.5V, V- = -13.5V TA = +25C NO Off-Leakage Current (Note 5) INO_(OFF) - 14V, VCOM_ = 14V, VNO_ = + V+ = 16.5V, V- = -16.5V TA = +25C -0.02 TA = TMIN to TMAX -1.25 COM Off-Leakage Current (Note 5) VCOM_ = 14V, - 14V, VNO_ = + ICOM_(OFF) V+ = 16.5V, V- = -16.5V COM On-Leakage Current (Note 5) 2 VCOM_ = 14V, VNO_ = 14V, ICOM_(ON) V+ = 16.5V, V- = -16.5V V- MAX4578 MAX4579 MAX4578 MAX4579 220 TA = TMIN to TMAX 350 475 4 TA = TMIN to TMAX 12 15 TA = +25C -0.05 TA = TMIN to TMAX -6.5 TA = +25C -0.05 TA = TMIN to TMAX -3.25 TA = +25C -0.05 TA = TMIN to TMAX -6.5 TA = +25C -0.05 TA = TMIN to TMAX -3.25 0.001 0.02 1.25 0.005 0.05 6.5 0.005 nA 0.05 nA 3.25 0.006 0.05 0.008 0.05 6.5 _______________________________________________________________________________________ 3.25 nA High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers (V+ = +15V 10%, V- = -15V 10%, logic levels = 2.4V and 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP 2.4 1.9 MAX UNITS LOGIC INPUTS Input High Voltage VIH Input Low Voltage VIL Input Current with Input Voltage High IIH VEN = VA_ = VLATCH = VCAL = V+ Input Current with Input Voltage Low IIL VEN = VA_ = VLATCH = VCAL = 0 V 1.9 0.8 V -1 0.001 1 A -1 0.001 1 A 20 V SUPPLY Power-Supply Range Positive Supply Current Negative Supply Current GND Supply Current 4.5 I+ I- IGND VEN = VA_ = VLATCH = VCAL = 0 or V+, V+ = 16.5V, V- = -16.5V (Note 6) TA = +25C VEN = VA_ = VLATCH = VCAL = 0 or V+, V+ = 16.5V, V- = -16.5V (Note 6) TA = +25C -1 TA = TMIN to TMAX -5 VEN = VA_ = VLATCH = VCAL = 0 or V+, V+ = 16.5V, V- = -16.5V (Note 6) TA = +25C 50 80 A TA = TMIN to TMAX 120 0.001 1 A 5 50 80 A TA = TMIN to TMAX 120 DYNAMIC CHARACTERISTICS TA = +25C 320 450 Transition Time tTRANS Figure 1 Break-Before-Make Interval (Note 3) tOPEN Figure 2 Enable Turn-On Time tON Figure 3 Enable Turn-Off Time tOFF Figure 3 Charge Injection (Note 3) VCTE CL = 1nF, VNO_ = 0, RS = 0, Figure 4 TA = +25C 3.5 Off-Isolation VISO VEN = 0, RL = 50, Figure 5 TA = +25C -75 dB Crosstalk Between Channels (Note 8) VCT VEN = 2.4V, f = 1MHz, VGEN = 1Vp-p, Figure 5 TA = +25C -70 dB Logic Input Capacitance CIN f = 1MHz TA = +25C 3 pF COFF f = 1MHz, VEN = 0, Figure 6 TA = +25C 3 pF COM Off-Capacitance CCOM_(OFF) f = 1MHz, VEN = 0, Figure 6 TA = +25C 14 pF COM On-Capacitance CCOM_(ON) f = 1MHz, VEN = 2.4V, Figure 6 TA = +25C 20 pF NO Off-Capacitance TA = TMIN to TMAX TA = +25C TA = +25C 600 50 180 260 TA = TMIN to TMAX TA = +25C ns 400 500 130 TA = TMIN to TMAX ns 220 300 0 ns ns pC _______________________________________________________________________________________ 3 MAX4578/MAX4579 ELECTRICAL CHARACTERISTICS--Dual 15V Supplies (continued) MAX4578/MAX4579 High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers ELECTRICAL CHARACTERISTICS--Dual 15V Supplies (continued) (V+ = +15V 10%, V- = -15V 10%, logic levels = 2.4V and 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX 70 200 UNITS LATCH TIMING (Note 3) Setup Time tS Figure 7 Hold Time tH Figure 7 Enable Setup Time tES Figure 8 tMPW Figure 7 Pulse Width, LATCH Enable TA = +25C TA = TMIN to TMAX 250 TA = +25C -10 TA = TMIN to TMAX -10 TA = +25C 0 22 TA = TMIN to TMAX ns 40 60 TA = +25C 120 TA = TMIN to TMAX 180 ns 72 ns ns INTERNAL DIVIDERS Offset Divider Output Gain Divider Output (V+ / 2) Divider Output (V+ - V-) Divider Output VREFHI = 10V, REFLO = GND VREFHI = 10V, REFLO = GND TA = +25C 14.9 / 4096 15 / 4096 15.1 / 4096 TA = TMIN to TMAX 14.9 / 4096 15 / 4096 15.1 / 4096 TA = +25C 4080.9 / 4096 4081 / 4096 4081.1 / 4096 TA = TMIN to TMAX 4080.9 / 4096 4081 / 4096 4081.1 / 4096 TA = +25C 2032 / 4096 2048 / 4096 2064 / 4096 TA = TMIN to TMAX 2032 / 4096 2048 / 4096 2064 / 4096 TA = +25C 2544 / 4096 2560 / 4096 2576 / 4096 TA = TMIN to TMAX 2544 / 4096 2560 / 4096 2576 / 4096 LSB LSB Referenced to GND LSB Referenced to V- LSB Output Resistance Offset Divider (Note 3) TA = +25C 400 800 Output Resistance Gain Divider (Note 3) TA = +25C 400 800 Output Resistance (V+ / 2) Divider (Note 3) TA = +25C 6 9 k Output Resistance (V+ - V-) Divider (Note 3) TA = +25C 6 9 k Output Resistance (REFHI, REFLO, GND) (Note 3) TA = +25C 400 800 Additional Positive Supply Current (Note 3) (V+ / 2) divider active, VIH = V+, VIL = 0 TA = +25C V+ / 24k V+ / 13k mA 4 _______________________________________________________________________________________ High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers (V+ = +15V 10%, V- = -15V 10%, logic levels = 2.4V and 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2) PARAMETER SYMBOL CONDITIONS Additional Positive Supply Current (Note 3) (V+ - V-) divider active, VIH = V+, VIL = 0 Additional Negative Supply Current (Note 3) (V+ - V-) divider active, VIH = V+, VIL = 0 MIN TYP mA TA = +25C (V+ - V-) / (V+ - V-) / 24k 13k mA V- 0.3 Offset divider active, gain divider active UNITS TA = +25C REFHI, REFLO Input Range (Note 3) Input Resistance (REFHI, REFLO) (Note 3) MAX (V+ - V-) / (V+ - V-) / 24k 13k TA = +25C 17 V+ + 0.3 32 V k ELECTRICAL CHARACTERISTICS--Dual 5V Supplies (V+ = +5V 10%, V- = -5V 10%, logic levels = 2.4V and 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS V+ V 900 SWITCH Analog Signal Range VNO_, VCOM_ (Note 3) V- RDS(ON) ICOM_ = 0.2mA, VNO_ = 3V, V+ = 4.5V, V- = -4.5V On-Resistance Matching Between Channels (Note 4) RDS(ON) ICOM_ = 0.2mA, VNO_ = 3.0V, V+ = 4.5V, V- = -4.5V NO Off-Leakage Current (Note 5) INO(OFF) - 4.5V, VCOM_ = 4.5V, VNO_ = + V+ = 5.5V, V- = -5.5V On-Resistance COM Off-Leakage Current (Note 5) COM On-Leakage Current (Note 5) VCOM_ = 4.5V, - 4.5V, 1V; VNO_ = + ICOM_(OFF) V+ = 5.5V, V- = -5.5V VCOM_ = 4.5V, VNO_ = 4.5V or ICOM_(ON) floating, V+ = 5.5V, V- = -5.5V MAX4578 MAX4579 MAX4578 MAX4579 TA = +25C 660 TA = TMIN to TMAX 1100 TA = +25C 10 TA = +25C -0.02 TA = TMIN to TMAX -1.25 TA = +25C -0.05 TA = TMIN to TMAX -6.5 TA = +25C -0.5 0.001 0.02 1.25 0.005 0.05 0.005 0.5 0.008 0.05 6.5 TA = TMIN to TMAX -6.5 TA = +25C -0.05 TA = TMIN to TMAX -6.5 6.5 TA = +25C -0.05 0.05 TA = TMIN to TMAX -3.25 3.25 nA nA 6.5 nA _______________________________________________________________________________________ 5 MAX4578/MAX4579 ELECTRICAL CHARACTERISTICS--Dual 15V Supplies (continued) MAX4578/MAX4579 High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers ELECTRICAL CHARACTERISTICS--Dual 5V Supplies (continued) (V+ = +5V 10%, V- = -5V 10%, logic levels = 2.4V and 0.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS LOGIC INPUTS (Note 3) Input High Voltage VIH Input Low Voltage VIL 2.4 Input Current with Input Voltage High IIH VEN = VA_ = VLATCH = VCAL = V+ Input Current with Input Voltage Low IIL VEN = VA_ = VLATCH = VCAL = 0 1.4 V 1.4 0.5 V -1.0 0.001 1.0 A -1.0 0.001 1.0 A 1.0 1.8 DYNAMIC CHARACTERISTICS (Note 3) TA = +25C Transition Time tTRANS VNO1 = 3V, VNO8 = 0, Figure 1 TA = TMIN to TMAX Break-Before-Make Interval tOPEN Figure 2 TA = +25C Enable Turn-On Time tON VNO1 = 3V, Figure 3 Enable Turn-Off Time tOFF VNO1 = 3V, Figure 3 2.2 200 TA = +25C 440 0.675 TA = TMIN to TMAX ns 1.2 1.5 TA = +25C 0.5 TA = TMIN to TMAX s 1.0 1.3 s s ELECTRICAL CHARACTERISTICS--Single +12V Supply (V+ = +12V, V- = 0, logic levels = 2.4V and 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at T A = +25C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS V+ V 750 SWITCH Analog Signal Range VNO_, VCOM_ (Note 3) 0 TA = +25C 470 On-Resistance RDS(ON) ICOM_ = 0.2mA, VNO_ = 3V, 10V On-Resistance Matching Between Channels (Note 4) R(ON) ICOM_ = 0.2mA, VNO_ = 3V, 10V TA = +25C NO Off-Leakage Current (Notes 5, 9) INO(OFF) VCOM_ = 1V, 11V; VNO_ = 11V, 1V TA = +25C -0.02 TA = TMIN to TMAX -1.25 6 TA = TMIN to TMAX 850 8 0.001 _______________________________________________________________________________________ 0.02 1.25 nA High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers (V+ = +12V, V- = 0, logic levels = 2.4V and 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX TA = +25C -0.05 0.005 0.05 TA = TMIN to TMAX -6.5 TA = +25C -0.05 0.005 0.05 TA = TMIN to TMAX -3.25 TA = +25C -0.05 TA = TMIN to TMAX -6.5 6.5 TA = +25C -0.05 0.05 TA = TMIN to TMAX -3.25 3.25 UNITS SWITCH (continued) MAX4578 COM Off-Leakage Current (Notes 5, 9) COM On-Leakage Current (Notes 5, 9) VCOM_ = 11V, 1V; ICOM_(OFF) VNO_ = 1V, 11V VCOM_ = 11V, 1V; ICOM_(ON) VNO_ = 11V, 1V, or floating MAX4579 MAX4578 MAX4579 6.5 nA 3.25 0.006 0.05 nA LOGIC INPUTS Input High Voltage VIH 2.4 Input Low Voltage VIL Input Current with Input Voltage High IIH VEN = VA_ = VLATCH = VCAL = V+ Input Current with Input Voltage Low IIL VEN = VA_ = VLATCH = VCAL = 0 1.8 V 1.8 0.8 V -1 0.001 1 A -1 0.001 1 A DYNAMIC CHARACTERISTICS (Note 3) Transition Time tTRANS VNO1 = 8V, VNO8 = 0, Figure 1 Break-Before-Make Interval tOPEN Figure 2 Enable Turn-On Time tON Figure 3 Enable Turn-Off Time tOFF Figure 3 TA = +25C 600 TA = TMIN to TMAX TA = +25C TA = +25C 120 400 540 TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 850 1100 ns 800 1100 150 ns 315 450 ns ns Note 2: 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 3: Guaranteed by design. Note 4: RON = RON(MAX) - RON(MIN). Note 5: Leakage parameters are 100% tested at maximum-rated hot temperature and guaranteed by correlation at TA = +25C. Note 6: If the logic inputs can float during power-on, connect a 1M pull-up from LATCH to V+. See Applications Information section. Note 7: Off-Isolation = 20log10 (VCOM / VNO), VCOM = output, VNO = input to off switch. Note 8: Between any two switches. Note 9: Leakage parameters testing at single supply are guaranteed by correlation with dual supplies. _______________________________________________________________________________________ 7 MAX4578/MAX4579 ELECTRICAL CHARACTERISTICS--Single +12V Supply (continued) Typical Operating Characteristics (TA = +25C, unless otherwise noted.) ON-RESISTANCE vs. VCOM AND TEMPERATURE (15V DUAL SUPPLIES) 300 RON () RON () 550 450 200 TA = +25C 150 7.5V 12V 350 TA = +70C 500 TA = +25C 400 300 TA = -40C 100 10V 250 TA = +85C TA = +70C 600 TA = +85C 250 V+ = +5V V- = -5V 700 RON () 4.5V V+ = +15V V- = -15V 350 800 MAX4578/79 toc 02 650 400 MAX4578/79 toc 01 750 ON-RESISTANCE vs. VCOM AND TEMPERATURE (5V DUAL SUPPLIES) MAX4578/79 toc 03 ON-RESISTANCE vs. VCOM (DUAL SUPPLIES) TA = -40C 200 50 100 15V 0 150 -10 -5 0 5 10 15 -10 -5 10 15 -5 -3 -2 -1 0 1 2 3 4 ON-RESISTANCE vs. VCOM (SINGLE SUPPLY) ON-RESISTANCE vs. VCOM AND TEMPERATURE (5V SINGLE SUPPLY) ON-RESISTANCE vs. VCOM AND TEMPERATURE (12V SINGLE SUPPLY) TA = +85C 1800 1600 TA = +70C 1400 1300 1100 +7.5V +10V 700 TA = +85C 500 TA = +25C 1200 TA = -40C 1000 300 300 600 200 7.5 10 TA = -40C 100 V+ = +5V V+ = +12V 0 0 12.5 0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 VCOM (V) 2 4 LEAKAGE CURRENT vs. TEMPERATURE V+ = +15V V- = -15V I+ 100 8 10 700 600 500 10 tON, tOFF (ns) 10 ICOM (OFF) I+, I- (A) 1 0.1 ICOM (ON) 1 100n 0.01 INO (OFF) 0.001 0.0001 I- 5 25 45 65 TEMPERATURE (C) 85 105 125 400 tON 300 200 10n tOFF 100 0 1n -55 -35 -15 12 TURN-ON/TURN-OFF TIME vs. SUPPLY SUPPLY CURRENT vs. TEMPERATURE 1m MAX4578/79 toc 07 1000 6 VCOM (V) VCOM (V) MAX4578/79 toc 08 5.0 TA = +25C 800 200 2.5 TA = +70C 400 400 +12V 500 600 MAX4578/79 TOC 09 900 700 RON () RON () 1500 5 MAX4578/79 toc 06 2000 MAX4578/79 toc 04 +4.5V 0 -4 VCOM (V) 1700 8 5 VCOM (V) 1900 100 0 VCOM (V) 2100 RON () 0 -15 MAX4578/79 toc 05 -15 LEAKAGE CURRENT (nA) MAX4578/MAX4579 High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers -40 -20 0 20 40 60 TEMPERATURE (C) 80 100 5 6 7 8 9 10 11 12 13 14 15 V+, V- (V) _______________________________________________________________________________________ High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers TURN-ON/TURN-OFF TIME vs. TEMPERATURE (5V) 700 250 200 150 tOFF 400 400 300 200 200 50 100 100 0 -20 0 20 40 60 80 20 40 60 80 100 -40 -20 0 20 40 60 80 TEMPERATURE (C) CHARGE INJECTION vs. VCOM OFFSET DIVIDER OUTPUT vs. VREFHI OFFSET DIVIDER OUTPUT vs. TEMPERATURE 12V 2 0 5V -2 -4 15.040 15.020 15V 15.000 14.980 5V 14.960 15.060 -5 0 5 10 15.040 15.020 15.000 14.980 14.960 14.940 14.940 14.920 14.920 14.900 14.900 -10 15 VREFHI = 10V VREFLO = 0 V+ = +15V V- = -15V 15.080 OUTPUT RATIO (LSB) 15.060 MAX4578/79 toc 15 15.080 OUTPUT RATIO (LSB) 4 VREFLO = 0 1 2 3 4 -40 5 6 7 8 9 10 11 12 13 14 15 -20 0 20 60 80 VCOM (V) VREFHI (V) TEMPERATURE (C) GAIN DIVIDER OUTPUT vs. VREFHI GAIN DIVIDER OUTPUT vs. TEMPERATURE (V+ / 2) DIVIDER OUTPUT vs. SUPPLY VOLTAGE 4081.020 5V 15V 4080.960 4081.040 4081.020 4081.000 4080.980 4080.960 2056.00 2054.00 2052.00 2050.00 2048.00 2046.00 4080.940 4080.940 2044.00 4080.920 4080.920 2042.00 4080.900 4080.900 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 VREFHI (V) MAX4578/79 toc 18 2058.00 OUTPUT RATIO (LSB) 4081.040 4081.060 100 2060.00 MAX4578/79 toc 17 4081.060 VREFHI = 10V VREFLO = 0 V+ = +15V V- = -15V 4081.080 OUTPUT RATIO (LSB) VREFLO = 0 4080.980 4081.100 MAX4578/79 toc 16 4081.100 100 15.100 MAX4578/79 toc 14 15.100 MAX4578/79 toc 13 15V 6 4081.000 0 TEMPERATURE (C) 8 4081.080 -20 TEMPERATURE (C) 10 -15 tOFF 0 -40 100 tON 500 100 -40 Q (pC) 500 300 tOFF 0 OUTPUT RATIO (LSB) 600 tON 600 V+ = +12V V- = 0 700 tON, tOFF (ns) tON tON, tOFF (ns) tON, tOFF (ns) 300 V+ = +5V V- = -5V 800 800 MAX4578/79 toc 11 V+ = +15V V- = -15V 350 900 MAX4578/79 toc 10 400 TURN-ON/TURN-OFF TIME vs. TEMPERATURE (12V) MAX4578/79 toc 12 TURN-ON/TURN-OFF TIME vs. TEMPERATURE (15V) 2040.00 -40 -20 0 20 60 TEMPERATURE (C) 80 100 5 6 7 8 9 10 11 12 13 14 15 V+, V- (V) _______________________________________________________________________________________ 9 MAX4578/MAX4579 Typical Operating Characteristics (continued) (TA = +25C, unless otherwise noted.) Typical Operating Characteristics (continued) (TA = +25C, unless otherwise noted.) (V+ - V-) DIVIDER OUTPUT vs. SUPPLY VOLTAGE 5V 2051 2050 2049 15V 2048 2047 2568 2566 OUTPUT RATIO (LSB) 2052 2565 OUTPUT RATIO (LSB) 2053 2570 MAX4578/79 toc 20 2054 OUTPUT RATIO (LSB) 2570 MAX4578/79 toc 19 2055 (V+ - V-) DIVIDER OUTPUT vs. TEMPERATURE 2560 2555 MAX4578/79 toc 21 (V+ / 2) DIVIDER OUTPUT vs. TEMPERATURE 5V 2564 2562 2560 2558 15V 2556 2550 2554 2046 2545 2045 -40 -20 0 20 60 80 2552 5 100 6 7 8 9 10 11 12 13 14 15 TEMPERATURE (C) V+, V- (V) ROUT vs. TEMPERATURE (OFFSET DIVIDER AND GAIN DIVIDER) ROUT vs. TEMPERATURE (V+ / 2 DIVIDER AND V+ - V- DIVIDER) 450 5700 ROUT () GAIN DIVIDER 400 350 V+ = +15V V- = -15V 5900 5500 -20 0 20 60 80 100 FREQUENCY RESPONSE MAX4578/79 toc 23 V+ = +15V V- = -15V -40 TEMPERATURE (C) 6100 MAX4578/79 toc 22 500 ROUT () MAX4578/MAX4579 High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers MAX4578/79 toc 24 0dB INSERTION LOSS 40/div (V+ / 2) DIVIDER ON-PHASE 10dB/ div 5300 5100 OFFSET DIVIDER (V+ - V-) DIVIDER 4900 300 4700 4500 250 -40 -20 0 20 40 60 TEMPERATURE (C) 10 OFF-ISOLATION 80 100 -40 -20 0 20 40 60 TEMPERATURE (C) 80 100 100k 1M 10M FREQUENCY (Hz) ______________________________________________________________________________________ 100M High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers MAX4578 (Single 8-to-1 Cal-Mux) PIN NAME 1 V+ 2 GND FUNCTION MAX4579 (Dual 4-to-1 Cal-Mux) PIN NAME Positive Supply Voltage 1 V+ Ground 2 GND FUNCTION Positive Supply Voltage Ground 3 V- Negative Supply Voltage 3 V- 4 REFHI Reference High Voltage Input 4 REFHI Negative Supply Voltage Reference High Voltage Input 5 REFLO Reference Low Voltage Input 5 REFLO Reference Low Voltage Input 6 COM Output 6 COMA Multiplexer Output A 7 NO1 Channel Input 1 7 NO1A Channel Input 1A 8 NO2 Channel Input 2 8 NO2A Channel Input 2A 9 NO3 Channel Input 3 9 NO3A Channel Input 3A 10 NO4 Channel Input 4 10 NO4A Channel Input 4A 11 NO5 Channel Input 5 11 NO1B Channel Input 1B 12 NO6 Channel Input 6 12 NO2B Channel Input 2B 13 NO7 Channel Input 7 13 NO3B Channel Input 3B 14 NO8 Channel Input 8 14 NO4B Channel Input 4B 15 A2 Address Bit 2 15 COMB Multiplexer Output B 16 A1 Address Bit 1 16 A1 Address Bit 1 17 A0 Address Bit 0 17 A0 Address Bit 0 18 CAL Calibration Control Input 18 CAL 19 EN Multiplexer Enable 19 EN 20 LATCH Address Latch Control Input 20 LATCH Calibration Control Input Multiplexer Enable Address Latch Control Input ______________________________________________________________________________________ 11 MAX4578/MAX4579 Pin Descriptions MAX4578/MAX4579 High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers Truth Tables MAX4578 (Single 8-to-1 Cal-Mux) CAL A2 A1 A0 EN LATCH COM x x x x 0 x All switches and dividers open. COM is high-Z. Latch contents set to all 1s. x x x x 1 1 State is latched when LATCH is high. 0 0 0 0 1 0 NO1 0 0 0 1 1 0 NO2 0 0 1 0 1 0 NO3 0 0 1 1 1 0 NO4 0 1 0 0 1 0 NO5 0 1 0 1 1 0 NO6 0 1 1 0 1 0 NO7 0 1 1 1 1 0 NO8 1 0 0 0 1 0 (V+ / 2) Divider, VCOM = 2048 / 4096 (V+) 1 0 0 1 1 0 REFHI 1 0 1 0 1 0 REFLO 1 0 1 1 1 0 (V+ - V-) Divider, VCOM= 2560 / 4096 (V+ - V-) 1 1 0 0 1 0 GND 1 1 0 1 1 0 Gain Divider Mode VCOM = (4081 / 4096) (VREFHI - VREFLO) 1 1 1 0 1 0 Offset Divider Mode VCOM = (15 / 4096) (VREFHI - VREFLO) 1 1 1 1 1 0 All switches and dividers open. COM is high-Z. x = Don't Care MAX4579 (Dual 4-to-1 Cal-Mux) CAL A1 A0 EN LATCH x x x 0 x x 0 0 0 0 1 1 1 x 0 0 1 1 0 0 1 x 0 1 0 1 0 1 0 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 1 1 1 1 0 COMA All switches and dividers open. COMA is high-Z. State is latched NO1A NO2A NO3A NO4A GND Gain Divider Mode Offset Divider Mode COMB All switches and dividers open. COMB is high-Z. State is latched NO1B NO2B NO3B NO4B GND REFLO REFLO All switches and dividers open. COMA is high-Z. All switches and dividers open. COMB is high-Z. x = Don't Care 12 ______________________________________________________________________________________ High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers The MAX4578/MAX4579 are multiplexers with additional calibration features. Internal resistor-dividers generate accurate voltage ratios from an external voltage reference, allowing zero and full-scale calibration of ADC systems, as well as facilitation of system self-monitoring. To access the resistor-dividers, assert the CAL pin. When CAL and ENABLE are asserted, the three address pins select one of the various resistor-divider or external reference outputs. The MAX4578/ MAX4579 also contain a LATCH input that allows the state of the CAL and address signals to be captured. Calibration Functions The gain-divider, offset-divider, REFHI, and REFLO modes allow calibration of offset and gain errors in ADC systems. The gain-divider mode outputs a voltage ratio that is 4081/4096 of VREFHI - VREFLO, accurate to 0.1/4096 or better than 15 bits. The offset-divider mode outputs a voltage ratio that is 15/4096 of V REFHI VREFLO, also accurate to 0.1/4096. The REFHI mode allows the voltage on the REFHI pin to be switched to the output. The REFLO mode allows the voltage on the REFLO pin to be switched to the output. Self-Monitoring Functions The self-monitoring functions are intended to allow an ADC to measure its own supply voltage. The MAX4578 has an internal divide-by-two resistor string between V+ and GND that is accurate to 8 bits. It also has a 5/8 resistor string between V+ and V- that is accurate to 8 bits. This divider string allows measurement of the negative supply with a unipolar ADC. GND can also be switched to the output, eliminating the need for an additional multiplexer channel. __________ Applications Information The MAX4578/MAX4579's construction is typical of most CMOS analog switches. There are three supply pins: V+, V-, and GND. The positive and negative power supplies provide drive to the internal CMOS switches and set the limits of the analog voltage on any switch. Reverse-biased ESD protection diodes are internally connected between each analog signal pin and both V+ and V-. If the voltage on any pin exceeds V+ or V-, one of these diodes will conduct. During normal operation, these reverse-biased ESD diodes leak, forming the only current drawn from V-. Virtually all the analog leakage current is through the ESD diodes. Although the ESD diodes on a given signal pin are identical, and therefore fairly well balanced, they are reverse-biased differently. Each is biased by either V+ or V- and the analog signal. This means their leakage varies as the signal varies. The difference in the two-diode leakage from the signal path to the V+ and V- pins constitutes the analog signal-path leakage current. All analog-leakage current flows to the supply terminals, not to the other switch terminal, which explains how both sides of a given switch can show leakage currents of either the same or opposite polarity. There is no connection between the analog-signal paths and GND. The analog-signal paths consist of an N-channel and P-channel MOSFET with their sources and drains paralleled and their gates driven out of phase with V+ and V- by the logic-level translators. V+ and GND power the internal logic and logic-level translators and set the input-logic thresholds. The logiclevel translators convert the logic levels to switched V+ and V- signals to drive the gates of the analog switches. This drive signal is the only connection between the logic supplies and the analog supplies. All pins have ESD protection to V+ and to V-. Increasing V- has no effect on the logic-level thresholds, but it does increase the drive to the P-channel switches, which reduces their on-resistance. V- also sets the negative limit of the analog-signal voltage. The logic-level thresholds are CMOS- and TTLcompatible when V+ is greater than +4.5V. Bipolar-Supply Operation The MAX4578/MAX4579 operate with bipolar supplies between 4.5V and 20V. The V+ and V- supplies need not be symmetrical, but their sum cannot exceed the absolute maximum rating of 44V. Note: Do not connect the MAX4578/MAX4579 V+ pin to +3V AND connect logic-level input pins to TTL logic-level signals. TTL logic-level outputs can exceed the absolute maximum ratings, which will cause damage to the part and/or external circuits. Single-Supply Operation The MAX4578/MAX4579 operate from a single supply between +4.5V and +36V when V- is connected to GND. All of the bipolar precautions must be observed (see Bipolar Supply Operation section). However these parts are optimized for 15V operation, and most AC and DC characteristics are degraded significantly when departing from 15V. As the overall supply voltage (V+ to V-) is lowered, switching speed, on-resistance, off-isolation, and distortion will degrade, and supply current will decrease (see the Typical Operating Characteristics section). ______________________________________________________________________________________ 13 MAX4578/MAX4579 Detailed Description MAX4578/MAX4579 High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers Single-supply operation also limits signal levels and interferes with ground referenced signals. When V- = 0, AC signals are limited to -0.3V. Voltages below -0.3V can be clipped by the internal ESD-protection diodes, and the parts can be damaged if excessive current flows. Power Up During power up, on-chip latches will strobe whatever addresses are present if EN goes high before LATCH reaches a logic high. When this condition occurs, one of the internal dividers connected between the supplies may immediately turn on, causing higher supply current (1.4mA) when the enable input is toggled. Avoid this condition by ensuring that EN stays low until the remaining logic inputs are valid. To accomplish this, connect a resistor from EN to ground or apply a low voltage to EN before the other logic inputs go high. Power Off When power to the MAX4578/MAX4579 is off (i.e., V+ = V- = 0), the Absolute Maximum Ratings still apply. This means that neither logic-level inputs on NO_ nor signals on COM_ can exceed 0.3V. Voltages beyond 0.3V cause the internal ESD-protection diodes to conduct, and the parts can be damaged if excessive current flows. ______________________________________________Test Circuits/Timing Diagrams +15V V+ NO1 EN LATCH CAL V+ A0 A1 A2 +5V NO2-NO7 MAX4578 NO8 -5V VCOM COM GND V- 50 10pF 1k -15V LOGIC -15V INPUT VEN 0V 50% 50% VNO1, VNO1B SWITCH OUTPUT VCOM +15V 90% 0V 90% V+ V+ A0 VNO8, VNO4B NO1B NO2B-NO3B NO1A-NO2A +5V MAX4579 NO4B -5V EN LATCH CAL A1 GND tTRANS COMB V- tTRANS VCOM 1k 50 10pF -15V Figure 1. Transition Time 14 tR < 20ns tF < 20ns ______________________________________________________________________________________ High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers +15V V+ V+ EN LOGIC INPUT VA LATCH NO1-NO8 CAL A0 VA MAX4578 50 50% 0V GND VCOM V10pF SWITCH OUTPUT VCOM tOPEN 0V +15V -15V V+ EN LATCH NO1A-NO4B NO1B-NO4B CAL A0 VA LOGIC +5V INPUT 0V VA +5V MAX4579 A1 tR < 20ns t < 20ns 50% F 50% 0.8VNO_ 90% COMA V- GND 50 tR < 20ns tF < 20ns 90% COM 1k V+ 50% 0.8VNO_ A1 A2 +5V +5V VCOM 10pF 1k 90% SWITCH OUTPUT VCOM tOPEN 0V -15V Figure 2. Break-Before-Make Interval +15V VEN V+ EN NO1 LATCH CAL +5V NO2-NO8 VEN MAX4578 A0 A1 A2 GND 50 V- 10pF NO1B GND 0.8(VNO1, VNO1B) VCOM +5V 0V tON MAX4579 A1 50 tR < 20ns tF < 20ns 90% 90% NO2B-NO4B NO1A-NO4A LATCH CAL A0 -15V V+ EN 50% VCOM 1k VEN 50% 0V COM +15V +5V COMB V- tOFF VCOM 1k 10pF -15V Figure 3. Enable Switching Time ______________________________________________________________________________________ 15 MAX4578/MAX4579 Test Circuits/Timing Diagrams (continued) MAX4578/MAX4579 High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers _________________________________Test Circuits/Timing Diagrams (continued) +15V RS NO_ V+ LOGIC INPUT VEN EN VS CHANNEL SELECT A0 A1 A2 MAX4578 CAL LATCH GND COM +5V ON OFF ON 0V VCOM CL = 100pF VOUT VCOM VOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF. V-15V Q = VOUT * CL +15V RS V+ NO_ LOGIC INPUT VEN EN VS CHANNEL SELECT A0 MAX4579 COMA +5V ON OFF VCOM A1 CAL LATCH GND CL = 100pF V- VOUT VCOM VOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF. -15V Q = VOUT * CL Figure 4. Charge Injection 16 ON 0V ______________________________________________________________________________________ High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers +15V 10nF V+ VIN V+ EN NETWORK ANALYZER 50 50 OFF-ISOLATION = 20log VOUT VIN CROSSTALK = 20log VOUT VIN NO_ MAX4578 MAX4579 V+ VCOM MEAS. REF COM_ A LATCH CAL V- GND 50 50 10nF -15V NOTES: MEASUREMENTS ARE STANDARDIZED AGAINST SHORT AT SOCKET TERMINALS. OFF-ISOLATION IS MEASURED BETWEEN COM AND "OFF" TERMINAL ON EACH SWITCH. ON LOSS IS MEASURED BETWEEN COM AND "ON" TERMINAL ON EACH SWITCH. Figure 5. Off-Isolation/Crosstalk +15V +15V V+ V+ A2 CHANNEL SELECT A1 NO1A NO1 NO8 MAX4578 A0 1MHz CAPACITANCE ANALYZER COM CHANNEL SELECT A1 MAX4579 NO4A A0 COMA f = 1MHz f = 1MHz CAL, LATCH, GND EN V- -15V 1MHz CAPACITANCE ANALYZER CAL, LATCH, GND EN V- -15V Figure 6. NO_/COM_ Capacitance ______________________________________________________________________________________ 17 MAX4578/MAX4579 _________________________________Test Circuits/Timing Diagrams (continued) MAX4578/MAX4579 High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers _________________________________Test Circuits/Timing Diagrams (continued) +15V EN +5V +15V V+ EN LATCH NO2 +5V V+ LATCH NO2 MAX4578 MAX4578 NO1, NO3-NO8 A1 NO1, NO3-NO8 A1 A0 A0 A2 CAL A2 CAL GND V- COM GND -15V 50% LATCH 50% tS ADDRESS (A_) COM -15V tMPW LATCH V- 50% tH VIN VIL 50% EN NOTE: TIMING MEASUREMENT REFERENCE LEVEL IS Figure 7. Setup Time, Hold Time, Latch Pulse Width 18 tES VIH - VIL 2 Figure 8. Enable Setup Time ______________________________________________________________________________________ High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers V+ 1 20 MAX4578 19 3R R2 LOGIC DECODER 18 17 16 15 GND VREFHI 5R R2 15R1 4081R1 MAX4578/MAX4579 Pin Configurations/ Functional Diagrams (continued) LATCH EN CAL A0 A1 A2 2 3 4 15R1 4081R1 REFLO COM NO1 NO2 NO3 NO4 5 6 7 8 9 10 14 13 12 11 NO8 NO7 NO6 NO5 ______________________________________________________________________________________ 19 Ordering Information (continued) PART TEMP. RANGE MAX4579CAP 0C to +70C 20 SSOP PIN-PACKAGE MAX4579CWP 0C to +70C 20 SO Wide MAX4579CPP 0C to +70C 20 Plastic DIP MAX4579EAP -40C to +85C 20 SSOP MAX4579EWP -40C to +85C 20 SO Wide MAX4579EPP -40C to +85C 20 Plastic DIP ___________________Chip Information TRANSISTOR COUNT: 520 Package Information SSOP.EPS MAX4578/MAX4579 High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers 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. 20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 1998 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. ENGLISH * ???? * ??? * ??? WHAT'S NEW PRODUCTS SOLUTIONS DESIGN APPNOTES SUPPORT BUY COMPANY MEMBERS MAX4578 Part Number Table Notes: 1. See the MAX4578 QuickView Data Sheet for further information on this product family or download the MAX4578 full data sheet (PDF, 192kB). 2. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. 3. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. 4. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: See full data sheet or Part Naming C onventions. 5. * Some packages have variations, listed on the drawing. "PkgC ode/Variation" tells which variation the product uses. Part Number Free Sample Buy Direct Package: TYPE PINS SIZE Temp DRAWING CODE/VAR * MAX4578C /D RoHS/Lead-Free? Materials Analysis RoHS/Lead-Free: No MAX4578C PP PDIP;20 pin;.300" Dwg: 21-0043D (PDF) Use pkgcode/variation: P20-2* 0C to +70C RoHS/Lead-Free: No Materials Analysis MAX4578EPP PDIP;20 pin;.300" Dwg: 21-0043D (PDF) Use pkgcode/variation: P20-2* -40C to +85C RoHS/Lead-Free: No Materials Analysis MAX4578C WP-T SOIC ;20 pin;.300" Dwg: 21-0042B (PDF) Use pkgcode/variation: W20-4* 0C to +70C RoHS/Lead-Free: No Materials Analysis MAX4578C WP SOIC ;20 pin;.300" Dwg: 21-0042B (PDF) Use pkgcode/variation: W20-4* 0C to +70C RoHS/Lead-Free: No Materials Analysis MAX4578EWP SOIC ;20 pin;.300" Dwg: 21-0042B (PDF) Use pkgcode/variation: W20-4* -40C to +85C RoHS/Lead-Free: No Materials Analysis MAX4578EWP-T SOIC ;20 pin;.300" Dwg: 21-0042B (PDF) Use pkgcode/variation: W20-4* -40C to +85C RoHS/Lead-Free: No Materials Analysis MAX4578C AP-T SSOP;20 pin;.209" Dwg: 21-0056C (PDF) Use pkgcode/variation: A20-2* 0C to +70C RoHS/Lead-Free: No Materials Analysis MAX4578C AP SSOP;20 pin;.209" Dwg: 21-0056C (PDF) Use pkgcode/variation: A20-2* 0C to +70C RoHS/Lead-Free: No Materials Analysis MAX4578EAP SSOP;20 pin;.209" Dwg: 21-0056C (PDF) Use pkgcode/variation: A20-2* -40C to +85C RoHS/Lead-Free: No Materials Analysis MAX4578EAP-T SSOP;20 pin;.209" Dwg: 21-0056C (PDF) Use pkgcode/variation: A20-2* -40C to +85C RoHS/Lead-Free: No Materials Analysis Didn't Find What You Need? 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