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19-4780; Rev 1; 6/99
Low-Voltage, Single 8-to-1 and Dual 4-to-1 Cal-Multiplexers
General Description
The MAX4539/MAX4540 low-voltage, CMOS 8-channel (MAX4539) and dual 4-channel (MAX4540) multiplexers are ideal for precision ADC calibration and system selfmonitoring applications. These calibration multiplexers (cal-muxes) have precision resistor-dividers 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 1/2V+ 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 MAX4539/MAX4540 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 5V or a single +5V supply. Protection diodes at all inputs provide an ESD rating >2kV. The MAX4539/MAX4540 operate from a single +2.7V to +12V supply, or from dual supplies of 2.7V to 6V. On-resistance (100 max) is matched between switches to 6 max. Each switch can handle Rail-to-Rail(R) analog signals. The off leakage current is 0.1nA at TA = +25C and 2nA at TA = +85C. The MAX4539/MAX4540 are available in small 20-pin DIP, SO, and SSOP packages.
Features
o On-Chip Gain and Offset Divider Networks Provide 15-Bit Accurate Output Ratios o On-Chip V+ to GND and V+ to V- Divider Networks Provide 8-Bit Accurate Output Ratios o RON: 100 max o RON Matching Between Channels: 6 max o Charge Injection: 5pC max o Low 0.1nA Off Leakage Current o Small 20-Pin SSOP/SO/DIP Packages
MAX4539/MAX4540
Pin Configurations/ _______________Functional Diagrams
V+
1 3R
MAX4539
R2 LOGIC DECODER
20 19 18 17 16
LATCH EN CAL A0 A1 A2
Applications
Battery-Operated Equipment Data-Acquisition Systems Test Equipment Avionics Audio-Signal Routing Networking
GND VREFHI 2 3 4 15R1 4081R1 5R R2
15
Ordering Information
PART MAX4539CAP MAX4539CWP MAX4539CPP MAX4539EAP MAX4539EWP MAX4539EPP MAX4540CAP MAX4540CWP MAX4540CPP MAX4540EAP MAX4540EWP MAX4540EPP TEMP. RANGE 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C PIN-PACKAGE 20 SSOP 20 Wide SO 20 Plastic DIP 20 SSOP 20 Wide SO 20 Plastic DIP 20 SSOP 20 Wide SO 20 Plastic DIP 20 SSOP 20 Wide SO 20 Plastic DIP
15R1 4081R1 REFLO COM NO1 NO2 NO3 NO4 5 6 7 8 9 10 14 13 12 11
NO8 NO7 NO6 NO5
MAX4540 appears at end of data sheet. Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
________________________________________________________________ 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.
Low-Voltage, Single 8-to-1 and Dual 4-to-1 Cal-Multiplexers MAX4539/MAX4540
ABSOLUTE MAXIMUM RATINGS
V+ to GND ..............................................................-0.3V to +13V V- to GND ...............................................................-13V to +0.3V V+ to V-...................................................................-0.3V to +13V CAL, LATCH, A_, EN, NO_, COM_, REFHI, REFLO (Note 1) ........................(V- - 0.3V) to (V+ + 0.3V) Continuous Current (any terminal)....................................20mA Peak Current, NO_ or COM_ (pulsed at 1ms, 10% duty cycle max) ...........................40mA 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 MAX4539C_P/MAX4540C_P................................0C to +70C MAX4539E_P/MAX4540E_P .............................-40C to +85C Storage Temperature Range .............................-65C to +160C Lead Temperature (soldering, 10sec) ............................+300 C
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 Supplies
(V+ = +5V 10%, V- = -5V 10%, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values at TA = +25C.) (Note 2) PARAMETER SWITCH Analog-Signal Range On-Resistance On-Resistance Matching Between Channels (Note 4) On-Resistance Flatness (Note 5) NO-Off Leakage Current (Note 6) VCOM_, VNO_ RON RON (Note 3) ICOM_ = 1mA, VNO_ = 3.0V, V+ = 4.5V, V- = -4.5V ICOM_ = 1mA, VNO_ = 3.0V, V+ = 4.5V, V- = -4.5V TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 7 -0.1 -2 -0.2 -10 -0.1 -5 -0.2 -10 -0.1 -5 0.01 0.01 0.01 0.01 0.01 1 V45 V+ 75 100 4 6 10 13 0.1 2 0.2 10 0.1 5 0.2 10 0.1 5 nA nA nA V SYMBOL CONDITIONS MIN TYP MAX UNITS
RFLAT INO(OFF)
ICOM_ = 1mA; VNO_ = -3V, 0, +3V; TA = +25C V+ = 4.5V; V- = -4.5V TA = TMIN to TMAX VCOM_ = 4.5V, VNO_ = 4.5V, V+ = 5.5V, V- = -5.5V MAX4539 MAX4540 MAX4539 MAX4540 TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX
COM-Off Leakage Current (Note 6)
VCOM_ = 4.5V, VNO_ = 4.5V, ICOM_(OFF) V+ = 5.5V, V- = -5.5V VCOM_ = 4.5V, VNO_ = 4.5V, ICOM_(ON) V+ = 5.5V, V- = -5.5V
COM-On Leakage Current (Note 6)
2
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Low-Voltage, Single 8-to-1 and Dual 4-to-1 Cal-Multiplexers
ELECTRICAL CHARACTERISTICS--Dual Supplies (continued)
(V+ = +5V 10%, V- = -5V 10%, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values at TA = +25C.) (Note 2) PARAMETER LOGIC INPUTS Input High Voltage Input Low Voltage Input Current with Input Voltage High Input Current with Input Voltage Low SUPPLY Power-Supply Range Positive Supply Current I+ VEN = VA_ = VLATCH = VCAL = 0 or V+, V+ = 5.5V, V- = -5.5V (Note 7) VEN = VA_ = VLATCH = VCAL = 0 or V+, V+ = 5.5V, V- = -5.5V (Note 7) VEN = VA_ = VLATCH = VCAL = 0 or V+, V+ = 5.5V, V- = -5.5V (Note 7) TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 2.7 -1 -5 -1 -5 -1 -5 0.01 0.01 0.01 6 1 A 5 1 A 5 1 A 5 V VIH VIL IIH IIL VEN = VA_ = VLATCH = VCAL = V+ VEN = VA_ = VLATCH = VCAL = 0 -0.1 -0.1 2.4 1.7 1.4 0.01 0.01 0.8 0.1 0.1 V V A A SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX4539/MAX4540
Negative Supply Current
I-
GND Supply Current
IGND
DYNAMIC CHARACTERISTICS Transition Time Break-Before-Make Interval (Note 3) Enable Turn-On Time Enable Turn-Off Time Charge Injection (Note 3) Off-Isolation (Note 8) Crosstalk Between Channels (Note 9) Logic Input Capacitance NO-Off Capacitance COM-Off Capacitance COM-On Capacitance tTRANS tOPEN tON tOFF VCTE VISO VCT CIN COFF CCOM_(OFF) CCOM_(ON) Figure 1 Figure 2 Figure 3 Figure 3 CL = 1nF, VNO_ = 0, Figure 4 VEN = 0, f = 1MHz, Figure 5 VEN = 2.4V, f = 1MHz, VGEN = 1Vp-p, Figure 5 f = 1MHz f = 1MHz, VEN = VCOM_ = 0, Figure 6 f = 1MHz, VEN = VCOM_ = 0, Figure 6 f = 1MHz, VEN = 2.4V, VCOM_ = 0, Figure 6 TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = +25C TA = +25C TA = +25C TA = +25C TA = +25C TA = +25C 1 -75 -75 15 3 15 26 50 4 1 75 115 175 100 120 5 10 100 150 200 ns ns ns ns pC dB dB pF pF pF pF
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3
Low-Voltage, Single 8-to-1 and Dual 4-to-1 Cal-Multiplexers MAX4539/MAX4540
ELECTRICAL CHARACTERISTICS--Dual Supplies (continued)
(V+ = +5V 10%, V- = -5V 10%, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values at TA = +25C.) (Note 2) PARAMETER LATCH TIMING (Note 3) Setup Time Hold Time Pulse Width, Latch Enable Enable Setup Time INTERNAL DIVIDERS VREF = 4.096V, REFHI = 4.096V, REFLO = GND TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C (V+ / 2) Divider Output Referenced to GND TA = TMIN to TMAX TA = +25C (V+ - V-) Divider Output Referenced to VTA = TMIN to TMAX Output Resistance Offset Divider Output Resistance Gain Divider Output Resistance (V+ / 2) Divider Output Resistance (V+ - V-) Divider Output Resistance (REFHI, REFLO, GND) Additional Positive Supply Current (Note 3) (Note 3) (Note 3) (Note 3) (Note 3) (V+ / 2) divider active, VIH = V+, VIL = 0 (Note 3) TA = +25C TA = +25C TA = +25C TA = +25C TA = +25C TA = +25C 2544/ 4096 2560/ 4096 400 400 6 6 400 V+ / 24k 2576/ 4096 800 800 9 9 800 V+ / 13k k k mA 2032/ 4096 2544/ 4096 2048/ 4096 2560/ 4096 2064/ 4096 2576/ 4096 LSB 14.9/ 4096 14.9/ 4096 4080.9/ 4096 4080.9/ 4096 2032/ 4096 15/ 4096 15/ 4096 4081/ 4096 4081/ 4096 2048/ 4096 15.1/ 4096 LSB 15.1/ 4096 4081.1/ 4096 LSB 4081.1/ 4096 2064/ 4096 LSB tS tH tMPW tES Figure 7 Figure 7 Figure 7 Figure 8 TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX -10 -10 30 40 15 30 40 15 0 45 70 80 ns ns ns ns SYMBOL CONDITIONS MIN TYP MAX UNITS
Offset Divider Output
Gain Divider Output
VREF = 4.096V, REFHI = 4.096V, REFLO = GND
4
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Low-Voltage, Single 8-to-1 and Dual 4-to-1 Cal-Multiplexers
ELECTRICAL CHARACTERISTICS--Dual Supplies (continued)
(V+ = +5V 10%, V- = -5V 10%, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values at TA = +25C.) (Note 2) PARAMETER Additional Positive Supply Current (Note 3) Additional Negative Supply Current REFHI, REFLO Input Range (Note 3) Input Resistance (REFHI, REFLO) (Note 3) Offset divider active, gain divider active TA = +25C SYMBOL CONDITIONS (V+ - V-) divider active, VIH = V+, VIL = 0 (V+ - V-) divider active, VIH = V+, VIL = 0 (Note 3) TA = +25C TA = +25C V- 0.3 25 40 MIN TYP MAX UNITS mA mA V k
MAX4539/MAX4540
(V+ - V-)/ (V+ - V-)/ 24k 13k (V+ - V-)/ (V+ - V-)/ 24k 13k V+ + 0.3
ELECTRICAL CHARACTERISTICS--Single +5V Supply
(V+ = +5V 10%, V- = 0, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values at TA = +25C.) (Note 2) PARAMETER SWITCH Analog-Signal Range On-Resistance On-Resistance Matching Between Channels (Notes 3, 4) On-Resistance Flatness (Note 5) NO-Off Leakage Current (Notes 6, 10) VNO_, VCOM_ RON RON (Note 3) ICOM_ = 1mA, VNO_ = 3.0V, V+ = 4.5V ICOM_ = 1mA, VNO_ = 3.0V, V+ = 4.5V ICOM_ = 1mA; VNO_ = 3V, 2V, 1V; V+ = 4.5V VCOM_ = 1V, 4.5V; VNO_ = 4.5V, 1V; V+ = 5.5V TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX -0.1 -2 -0.2 -10 -0.1 -5 -0.2 -10 -0.1 -5 8 0.1 2 0.2 10 0.1 5 0.2 10 0.1 5 nA nA 2 0 80 V+ 150 200 8 12 nA V SYMBOL CONDITIONS MIN TYP MAX UNITS
RFLAT INO(OFF)
COM-Off Leakage Current (Notes 6, 10)
VCOM_ = 4.5V, 1V; MAX4539 ICOM_(OFF) VNO_ = 1V, 4.5V; V+ = 5.5V MAX4540 MAX4539 MAX4540
COM-On Leakage Current (Notes 6, 10)
VCOM_ = 4.5V, ICOM_(ON) VNO_ = 4.5V, V+ = 5.5V
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5
Low-Voltage, Single 8-to-1 and Dual 4-to-1 Cal-Multiplexers MAX4539/MAX4540
ELECTRICAL CHARACTERISTICS--Single +5V Supply (continued)
(V+ = +5V 10%, V- = 0, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values at TA = +25C.) (Note 2) PARAMETER LOGIC INPUTS (Note 3) Input High Voltage Input Low Voltage Input Current with Input Voltage High Input Current with Input Voltage Low SUPPLY Power-Supply Range Positive Supply Current (Note 3) GND Supply Current (Note 3) I+ VEN = VA_ = VLATCH = VCAL = 0 or V+, V+ = 5.5V VEN = VA_ = VLATCH = VCAL = 0 or V+, V+ = 5.5V TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX -10 -10 30 40 15 30 40 15 0 1 60 4 1 115 150 200 100 130 5 70 80 10 2.7 -1 -5 -1 -10 150 0.01 0.01 12 1 A 5 1 10 200 250 A V VIH VIL IIH IIL VEN = VA_ = VLATCH = VCAL = V+ VEN = VA_ = VLATCH = VCAL = 0 -0.1 -0.1 2.4 1.6 1.4 0.8 0.1 0.1 V V A A SYMBOL CONDITIONS MIN TYP MAX UNITS
IGND
DYNAMIC CHARACTERISTICS (Note 3) Transition Time Break-Before-Make Interval Enable Turn-On Time Enable Turn-Off Time Charge Injection LATCH TIMING (Note 3) Setup Time Hold Time Pulse Width, Latch Enable Enable Setup Time tS tH tMPW tES Figure 7 Figure 7 Figure 7 Figure 8 ns ns ns ns tTRANS tOPEN tON tOFF VCTE Figure 1 Figure 2 Figure 3 Figure 3 CL = 1nF, VNO_ = 0, Figure 4 ns ns ns ns pC
6
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Low-Voltage, Single 8-to-1 and Dual 4-to-1 Cal-Multiplexers
ELECTRICAL CHARACTERISTICS--Single +3V Supply
(V+ = +2.7V to +3.6V, V- = 0, VIH = 2.4V, VIL = 0.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values at TA = +25C.) (Note 2) PARAMETER SWITCH Analog-Signal Range On-Resistance LOGIC INPUTS (Note 3) Input High Voltage Input Low Voltage DYNAMIC (Note 3) Transition Time Enable Turn-On Time Enable Turn-Off Time LATCH TIMING (Note 3) Setup Time Hold Time Pulse Width, Latch Enable Enable Setup Time tS tH tMPW tES Figure 7 Figure 7 Figure 7 Figure 8 TA = +25C TA = +25C TA = +25C TA = +25C -10 40 50 0 100 ns ns ns ns tTRANS tON tOFF VNO1 = 1.5V, VNO8 = 0, Figure 1 VNO1 = 1.5V, Figure 3 VNO = 1.5V, Figure 3 TA = +25C TA = +25C TA = +25C 260 220 100 400 350 150 ns ns ns VIH VIL 2.4 1.1 1.1 0.5 V V VCOM_ RON (Note 3) ICOM_ = 0.2mA, VNO_ = 1.5V, V+ = 2.7V TA = +25C TA = TMIN to TMAX 0 220 V+ 500 600 V SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX4539/MAX4540
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: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal range. Note 6: Leakage parameters are 100% tested at maximum-rated hot temperature and guaranteed by correlation at TA = +25C. Note 7: If the logic inputs can float during power-on, connect a 1M pull-up from LATCH to V+; see Applications Information section. Note 8: Off Isolation = 20log10 (VCOM/VNO), VCOM = output, VNO = input to off switch. Note 9: Between any two switches. Note 10: Leakage testing with a single supply is guaranteed by testing with dual supplies.
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7
Low-Voltage, Single 8-to-1 and Dual 4-to-1 Cal-Multiplexers MAX4539/MAX4540
Typical Operating Characteristics
(TA = +25C, unless otherwise noted.)
ON-RESISTANCE vs. VCOM AND TEMPERATURE (SINGLE SUPPLY)
MAX4539-02 MAX4539-01
LEAKAGE CURRENT vs. TEMPERATURE
100n 10n LEAKAGE CURRENT (A) 1n 100p 10p 1p NO(OFF) 100f 10f -40 -20 0 20 40 60 80 100 120 TEMPERATURE (C) V+ = 5V V- = -5V COM(ON) RON () COM(OFF)
ON-RESISTANCE vs. VCOM AND TEMPERATURE (DUAL SUPPLIES)
TA = +85C
MAX4539-03
100 90 80 70 TA = +85C TA = +70C
60 50 40 RON () TA = +70C
60 50 40 30 20 10 0 0
TA = +25C TA = -40C
30 TA = +25C 20 10 0 TA = -40C
V+ = 5V V- = 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 VCOM (V)
V+ = 5V V- = -5V -5 -4 -3 -2 -1 0 1 2 3 4 5
VCOM (V)
ON-RESISTANCE vs. VCOM (DUAL SUPPLIES)
MAX4539-04
ON-RESISTANCE vs. VCOM (SINGLE SUPPLY)
MAX4539-05
SUPPLY CURRENT vs. TEMPERATURE
V+ = 5V V- = -5V I+ 1n II+ I- (A)
MAX4539-06
110 100 90 RON () V+ = 2.7V V- = -2.7V V+ = 3V V- = -3V V+ = 5V V- = -5V -5 -4 -3 -2 -1 0 1 2 3 4 5 V+ = 2.4V V- = -2.4V
190 170 150 RON () 130 110 90 70 50 30 0 1 2 3 4 5 6 7 8 9 V+ = 3V V+ = 5V V+ = 7.5V V+ = 10V V+ = 2.7V V- = 0
100n 10n
80 70 60 50 40 30
100p 10p 1p 0.1p -40 -20 0 20 40 60 80 100 120 140 TEMPERATURE (C)
10
VCOM (V)
VCOM (V)
ON/OFF TIME vs. SUPPLY VOLTAGE
MAX4539-07
ON/OFF TIME vs. TEMPERATURE
MAX4539-08
CHARGE INJECTION vs. VCOM
MAX4539-09
180 160 140 tON, tOFF (ns)
100 80 60 tON, tOFF (ns)
V+ = 5V V- = -5V tON
10 8 6 Q (pC) DUAL SUPPLIES V+ = 5V, V- = -5V
120 100 80 60 40 20 0 2 3 V+, V- (V) 4 5 tOFF tON
40 20 0 -20 -40 -40 -20 0 20
tOFF
4 2 0 -2
SINGLE SUPPLY V+ = 5V -5 -4 -3 -2 -1 0 1 2 3 4 5
40
60
80
100
TEMPERATURE (C)
VCOM (V)
8
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Low-Voltage, Single 8-to-1 and Dual 4-to-1 Cal-Multiplexers
Typical Operating Characteristics (continued)
(TA = +25C, unless otherwise noted.)
TOTAL HARMONIC DISTORTION vs. FREQUENCY
MAX4539-11 MAX4539-10
MAX4539/MAX4540
FREQUENCY RESPONSE
0 -10 -20 -30 LOSS (dB) -40 -50 -60 -70 -80 -90 0.1 1 10 FREQUENCY (MHz) OFF ISOLATION ON PHASE INSERTION LOSS 180 140 100 60 20 -20 -60 -100 V+ = 5V -140 V- = -5V -180 100 1000 PHASE (DEGREES) 0.1
ROUT vs. TEMPERATURE (V+ / 2 DIVIDER AND V+ - V- DIVIDER)
MAX4539-12
V+ = 5V V- = -5V 600 IN/OUT VIN = 5Vp-p
6030 5980 5930 ROUT () 5880 5830 5780 5730 (V+ - V-) ROUT V+ = 5V V- = -5V -40 -20 0 20 40 60 80 (V+ / 2) ROUT
THD (%)
0.01
0.001 10 100 1k FREQUENCY (Hz) 10k 100k
5680 TEMPERATURE (C)
100
(V+ / 2) DIVIDER OUTPUT vs. TEMPERATURE
V+ = +5V V- = -5V
MAX4539-13a
(V+ - V-) DIVIDER OUTPUT vs. TEMPERATURE
MAX4539-13b
GAIN DIVIDER OUTPUT vs. TEMPERATURE
4081.08 4081.06 OUTPUT RATIO (LSB) 4081.04 4081.02 4081.00 4080.98 4080.96 4080.94 4080.92 VREFHI = 4.096V VREFLO = 0 V+ = 5V V- = -5V
MAX4539-14 MAX4539-17
2050.0
2558.5 V+ = 5V V- = -5V 2558.4 OUTPUT RATIO (LSB)
4081.10
OUTPUT RATIO (LSB)
2558.3
2049.5
2558.2
2558.1
2049.0 -40
-20
0
20
40
60
80
100
2558.0 -40
4080.90 -20 0 20 40 60 80 100 -40 -20 0 20 40 60 80 100 TEMPERATURE (C) TEMPERATURE (C)
TEMPERATURE (C)
OFFSET DIVIDER OUTPUT vs. TEMPERATURE
MAX4539-15
GAIN DIVIDER OUTPUT vs. REFHI
4081.08 4081.06 OUTPUT RATIO (LSB) 4081.04 4081.02 4081.00 4080.98 4080.96 4080.94 4080.92 4080.90 VREFLO = 0 V+ = 5V V- = -5V or 0
MAX4539-16
OFFSET DIVIDER OUTPUT vs. REFHI
15.10 15.08 15.06 OUTPUT RATIO (LSB) 15.04 15.02 15.00 14.98 14.96 14.94 14.92 14.90 VREFLO = 0 V+ = 5V V- = -5V or 0
15.10 15.08 15.06 OUTPUT RATIO (LSB) 15.04 15.02 15.00 14.98 14.96 14.94 14.92 14.90 -40 -20 0 20 40 60 80 VREFHI = 4.096V VREFLO = 0 V+ = 5V V- = -5V
4081.10
100
2.0
2.5
3.0
3.5 REFHI (V)
4.0
4.5
5.0
2.0
2.5
3.0
3.5 REFHI (V)
4.0
4.5
5.0
TEMPERATURE (C)
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9
Low-Voltage, Single 8-to-1 and Dual 4-to-1 Cal-Multiplexers MAX4539/MAX4540
Typical Operating Characteristics (continued)
(TA = +25C, unless otherwise noted.)
ROUT vs. TEMPERATURE (OFFSET DIVIDER AND GAIN DIVIDER)
MAX4539-18
(V+ / 2) DIVIDER OUTPUT vs. SUPPLY VOLTAGE
2054 2053 OUTPUT RATIO (LSB)
MAX4539-19a
(V+ - V-) DIVIDER OUTPUT vs. SUPPLY VOLTAGE
MAX4539-19b
260 250 240 ROUT () 230 220 OFFSET DIVIDER 210 200 190 -40 -20 0 20 40 V+ = 5V V- = -5V VREFHI = 4.096V VREFLO = 0 60 80 GAIN DIVIDER
2055
2565
2052 2051 2050 2049 2048 2047 2046 2045
OUTPUT RATIO (LSB)
2560
2555
2550 2 3 4 V+, V- (V) 5 6 1 2 3 V+, V- (V) 4 5
100
TEMPERATURE (C)
Pin Descriptions
MAX4539 (Single 8-to-1 Cal-Mux)
PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 NAME V+ GND VREFHI REFLO COM NO1 NO2 NO3 NO4 NO5 NO6 NO7 NO8 A2 A1 A0 CAL EN LATCH FUNCTION Positive Supply Voltage Ground Negative Supply Voltage Reference High Voltage Input Reference Low Voltage Input Multiplexer Output Channel Input 1 Channel Input 2 Channel Input 3 Channel Input 4 Channel Input 5 Channel Input 6 Channel Input 7 Channel Input 8 Address Bit 2 Address Bit 1 Address Bit 0 Calibration Control Input Multiplexer Enable Address Latch Control Input
MAX4540 (Dual 4-to-1 Cal-Mux)
PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 NAME V+ GND VREFHI REFLO COMA NO1A NO2A NO3A NO4A NO1B NO2B NO3B NO4B COMB A1 A0 CAL EN LATCH FUNCTION Positive Supply Voltage Ground Negative Supply Voltage Reference High Voltage Input Reference Low Voltage Input Multiplexer Output A Channel Input 1A Channel Input 2A Channel Input 3A Channel Input 4A Channel Input 1B Channel Input 2B Channel Input 3B Channel Input 4B Multiplexer Output B Address Bit 1 Address Bit 0 Calibration Control Input Multiplexer Enable Address Latch Control Input
10
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Low-Voltage, Single 8-to-1 and Dual 4-to-1 Cal-Multiplexers
Truth Tables
MAX4539 (Single 8-to-1 Cal-Mux)
CAL X X 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 A2 X X 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 A1 X X 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 A0 X X 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 EN 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 LATCH X 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 COM All switches and dividers open. COM is high-Z. Latch contents set to all 1's. State is latched when LATCH is high. NO1 NO2 NO3 NO4 NO5 NO6 NO7 NO8 (V+ / 2) Divider Mode, VCOM = 2048/4096 V+ REFHI REFLO (V+ - V-) Divider Mode , VCOM = 2560/4096 (V+ - V-) GND Gain Divider Mode, VCOM = 4081/4096 (VREFHI - VREFLO) Offset Divider Mode, VCOM = 15/4096 (VREFHI - VREFLO) All switches and dividers open. COM is high-Z.
MAX4539/MAX4540
X = Don't care
MAX4540 (Dual 4-to-1 Cal-Mux)
CAL X X 0 0 0 0 1 1 1 1 A1 X X 0 0 1 1 0 0 1 1 A0 X X 0 1 0 1 0 1 0 1 EN 0 1 1 1 1 1 1 1 1 1 LATCH X 1 0 0 0 0 0 0 0 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 All switches and dividers open. COMA is high-Z. 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. COMB is high-Z.
X = Don't care
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11
Low-Voltage, Single 8-to-1 and Dual 4-to-1 Cal-Multiplexers MAX4539/MAX4540
Detailed Description
The MAX4539/MAX4540 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 MAX4539/MAX4540 also contain a LATCH input that allows the state of the CAL and address signals to be captured. 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 analogsignal 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 TTL- compatible when V+ is +5V. As V+ is raised, the threshold increases slightly; when V+ reaches +12V, the level threshold is about 3.2V. Although that is above the TTL output high-level minimum of 2.4V, it is still compatible with CMOS outputs.
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 VREFHI - 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 MAX4539 has an internal divide-by-two resistor string between V+ and GND that is accurate to 8 bits (16/4096). It also has a 5/8 resistor string between V+ and V- that is also 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.
Bipolar-Supply Operation
The MAX4539/MAX4540 operate with bipolar supplies between 2.7V and 6V. The V+ and V- supplies need not be symmetrical, but their sum cannot exceed the absolute maximum rating of 13V. Note: Do not connect the MAX4539/MAX4540 V+ pin to +3V AND connect the 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. Caution: The absolute maximum V+ to V- differential voltage is 13V. Typical "6-Volt" or "12-Volt" supplies with 10% tolerances can be as high as 13.2V. This voltage can damage the MAX4539/MAX4540. Even 5% tolerance supplies may have overshoot or noise spikes that exceed 13V.
Applications Information
The MAX4539/MAX4540'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
12
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Low-Voltage, Single 8-to-1 and Dual 4-to-1 Cal-Multiplexers
Single-Supply Operation
The MAX4539/MAX4540 operate from a single supply between +2.7V and +12V when V- is connected to GND. All of the bipolar precautions must be observed. However, these parts are optimized for 5V operation, and most AC and DC characteristics are degraded significantly when departing from 5V. As the overall supply voltage (V+ to V-) is lowered, switching speed, on-resistance, off isolation, and distortion will degrade. (see the Typical Operating Characteristics section). 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. the internal dividers connected between the supplies may inadvertently turn on, causing higher supply current (~200A supply current) when the enable input is toggled. Avoid this condition by ensuring that EN pin 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.
MAX4539/MAX4540
Power Off
When power to the MAX4539/MAX4540 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.
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 TRANSISTOR COUNT: 561
Chip Information
Test Circuits/Timing Diagrams
+5V V+ V+ EN LATCH CAL A0 A1 A2 50 -5V NO1 NO2-NO7 +3V
MAX4539
GND V-
NO8 COM
-3V VCOM 35pF 300 LOGIC INPUT VEN V+ 50% 0V 50% tR < 20ns tF < 20ns
VNO1, VNO1B SWITCH OUTPUT VCOM
90%
+5V V+ V+ EN LATCH CAL A0 A1 GND 50 -5V NO1B NO2B-NO3B NO1A-NO2A +3V
0V 90%
VNO8, VNO4B
tTRANS -3V VCOM 300 35pF
tTRANS
MAX4540 NO4B
COMB V-
Figure 1. Transition Time
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Low-Voltage, Single 8-to-1 and Dual 4-to-1 Cal-Multiplexers MAX4539/MAX4540
Test Circuits/Timing Diagrams (continued)
+5V V+ EN LATCH CAL A0 VA A1 A2 50 GND V300 +5V V+ EN LATCH CAL A0 VA A1 50 GND V+ NO1A-NO4B NO1B-NO4B LOGIC INPUT VA V+ 50% 0V -5V 35pF NO1-NO8 +3V V+ LOGIC INPUT VA V+ 50% 0V 50% tR < 20ns tF < 20ns
MAX4539
COM VCOM
0.8VNO_ 90% SWITCH OUTPUT VCOM 0V
tOPEN
tR < 20ns t < 20ns 50% F
+3V
MAX4540
COMA V300 -5V VCOM 35pF
0.8VNO_ 90% SWITCH OUTPUT VCOM 0V 90%
tOPEN
Figure 2. Break-Before-Make Interval
+5V VEN EN LATCH CAL A0 50 V+ NO1 NO2-NO8 VEN V+ 50% 0V VCOM 300 +5V VEN EN LATCH CAL A0 A1 50 GND V+ -5V 35pF 0.8(VNO1, VNO1B) VCOM 90% 90% NO1B +3V 50% +3V tR < 20ns tF < 20ns
MAX4539
COM V-
A1 A2 GND
NO2B-NO4B NO1A-NO4A
MAX4540
COMB V300 -5V VCOM 35pF
0V tON
tOFF
Figure 3. Enable Switching Time
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Low-Voltage, Single 8-to-1 and Dual 4-to-1 Cal-Multiplexers
Test Circuits/Timing Diagrams (continued)
+5V RS NO_ EN VS CHANNEL SELECT A0 A1 A2 V+ LOGIC INPUT VEN COM VCOM VOUT VCOM VOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF. Q = VOUT x CL +5V RS NO_ EN VS CHANNEL SELECT A0 A1 CAL LATCH GND V+ LOGIC INPUT VEN COMA VCOM_ VOUT VCOM VOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF. Q = VOUT x CL V+ ON 0V OFF ON V+ ON 0V OFF ON
MAX4539/MAX4540
MAX4539
CAL LATCH GND
CL = 1nF V-5V
MAX4540
CL = 1nF V-5V
Figure 4. Charge Injection
+5V 10nF NETWORK ANALYZER 50 50 V OFF ISOLATION = 20log OUT VIN V CROSSTALK = 20log OUT VIN MEAS. REF
V+
EN
V+ NO_
VIN
V+ A
MAX4539 MAX4540
COM_ LATCH CAL V- GND 10nF
VCOM
50
50
+5V
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
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15
Low-Voltage, Single 8-to-1 and Dual 4-to-1 Cal-Multiplexers MAX4539/MAX4540
Test Circuits/Timing Diagrams (continued)
+5V V+ A2 CHANNEL SELECT A1 A0 CAL, LATCH, GND EN VNO1 1MHz CAPACITANCE ANALYZER f = 1MHz CAL, LATCH, GND EN V+5V V+ NO1A A1 A0 1MHz CAPACITANCE ANALYZER f = 1MHz
MAX4539
NO8 COM
CHANNEL SELECT
MAX4540 NO4A
COMA
-5V
-5V
Figure 6. NO_/COM_ Capacitance
V+
LATCH 50% 50%
EN +3V NO2
V+ LATCH
NO1, NO3-NO8 A1 A2 CAL A0 50% EN COM GND Vt ES
MAX4539
Figure 8. Enable Setup Time
V-
LATCH 50% t MPW 50% tH
tS ADDRESS (A_) VIH VIL
Figure 7. Setup Time, Hold Time, Latch Pulse Width
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Low-Voltage, Single 8-to-1 and Dual 4-to-1 Cal-Multiplexers
Pin Configurations/Functional Diagrams (continued)
MAX4539/MAX4540
V+ GND VREFHI
1 2 3 4
MAX4540
LOGIC DECODER
20 19 18 17 16
LATCH EN CAL A0 A1
15R 4081R
4081R
15R
REFLO COMA NO1A NO2A NO3A NO4A
5 6 7 8 9 10
15 14 13 12 11
COMB NO4B NO3B NO2B NO1B
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Low-Voltage, Single 8-to-1 and Dual 4-to-1 Cal-Multiplexers MAX4539/MAX4540
Package Information
SSOP.EPS
18
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Low-Voltage, Single 8-to-1 and Dual 4-to-1 Cal-Multiplexers
Package Information (continued)
PDIPN.EPS
MAX4539/MAX4540
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19
Low-Voltage, Single 8-to-1 and Dual 4-to-1 Cal-Multiplexers MAX4539/MAX4540
Package Information (continued)
SOICW.EPS
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) 1999 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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