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 self-
monitoring 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 (100Ωmax) is matched between switch-
es to 6Ωmax. Each switch can handle Rail-to-Rail®
analog signals. The off leakage current is 0.1nA at
TA= +25°C and 2nA at TA= +85°C.
The MAX4539/MAX4540 are available in small 20-pin
DIP, SO, and SSOP packages.
Applications
Battery-Operated Equipment Avionics
Data-Acquisition Systems Audio-Signal Routing
Test Equipment Networking
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
♦RON: 100Ωmax
♦RON Matching Between Channels: 6Ωmax
♦Charge Injection: 5pC max
♦Low 0.1nA Off Leakage Current
♦Small 20-Pin SSOP/SO/DIP Packages
MAX4539/MAX4540
Low-Voltage, Single 8-to-1 and
Dual 4-to-1 Cal-Multiplexers
________________________________________________________________
Maxim Integrated Products
1
MAX4539
R23R
5R R2
GND
V+
V-
REFHI
15R1 4081R1
4081R1
15R1
REFLO
COM
NO1
NO2
NO3
NO4
NO8
NO7
NO6
NO5
5
4
3
2
1
6
7
8
9
10
14
13
12
11
CAL
A0
A1
A2
18
17
LATCH
EN
20
19
16
15
LOGIC
DECODER
19-4780; Rev 1; 6/99
PART
MAX4539CAP
MAX4539CWP
MAX4539CPP 0°C to +70°C
0°C to +70°C
0°C to +70°C
TEMP. RANGE PIN-PACKAGE
20 SSOP
20 Wide SO
20 Plastic DIP
Pin Configurations/
_______________Functional Diagrams
Ordering Information
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
MAX4539EAP
MAX4539EWP -40°C to +85°C
-40°C to +85°C 20 SSOP
20 Wide SO
MAX4539EPP -40°C to +85°C 20 Plastic DIP
MAX4540CAP
MAX4540CWP
MAX4540CPP 0°C to +70°C
0°C to +70°C
0°C to +70°C 20 SSOP
20 Wide SO
20 Plastic DIP
MAX4540EAP
MAX4540EWP -40°C to +85°C
-40°C to +85°C 20 SSOP
20 Wide SO
MAX4540EPP -40°C to +85°C 20 Plastic DIP
MAX4540 appears at end of data sheet.
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.
MAX4539/MAX4540
Low-Voltage, Single 8-to-1 and
Dual 4-to-1 Cal-Multiplexers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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= +25°C.)
(Note 2)
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.
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.
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= +70°C)
SSOP (derate 8mW/°C above +70°C) ..........................640mW
Wide SO (derate 8mW/°C above +70°C)......................800mW
Plastic DIP (derate 10.53mW/°C above +70°C) ...........842mW
Operating Temperature Ranges
MAX4539C_P/MAX4540C_P................................0°C to +70°C
MAX4539E_P/MAX4540E_P .............................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) ............................+300° C
(Note 3)
ICOM_ = 1mA; VNO_ = -3V, 0, +3V;
V+ = 4.5V; V- = -4.5V
ICOM_ = 1mA, VNO_ = ±3.0V,
V+ = 4.5V, V- = -4.5V
ICOM_ = 1mA, VNO_ = ±3.0V,
V+ = 4.5V, V- = -4.5V
CONDITIONS
45 75
VV- V+
VCOM_,
VNO_
Analog-Signal Range
Ω
13
RFLAT
Ω
100
RON
On-Resistance
14
Ω
6
∆RON
710
On-Resistance Flatness
(Note 5)
UNITSMIN TYP MAXSYMBOLPARAMETER
On-Resistance Matching
Between Channels
(Note 4)
VCOM_ = ±4.5V, VNO_ = 4.5V,
V+ = 5.5V, V- = -5.5V nA
-2 2
INO(OFF) -0.1 0.01 0.1
NO-Off Leakage Current
(Note 6)
-10 10
VCOM_ = ±4.5V,
VNO_ = 4.5V,
V+ = 5.5V,
V- = -5.5V
-0.2 0.01 0.2
nA
-5 5
ICOM_(OFF) -0.1 0.01 0.1
COM-Off Leakage
Current (Note 6)
TA= +25°C
TA= TMIN to TMAX
TA= +25°C
TA= TMIN to TMAX
TA= +25°C
TA= TMIN to TMAX
TA= +25°C
TA= TMIN to TMAX
TA= +25°C
MAX4539 TA= TMIN to TMAX
TA= +25°C
TA= TMIN to TMAX
MAX4540
-10 10
-0.2 0.01 0.2
nA
-5 5
ICOM_(ON) -0.1 0.01 0.1
COM-On Leakage
Current (Note 6)
TA= +25°C
TA= TMIN to TMAX
MAX4539
TA= +25°C
TA= TMIN to TMAX
MAX4540
VCOM_ = ±4.5V,
VNO_ = ±4.5V,
V+ = 5.5V,
V- = -5.5V
SWITCH
±
±
MAX4539/MAX4540
Low-Voltage, Single 8-to-1 and
Dual 4-to-1 Cal-Multiplexers
_______________________________________________________________________________________ 3
CONDITIONS
VEN = VA_ = VLATCH = VCAL = V+ µA-0.1 0.01 0.1IIH
Input Current with Input
Voltage High
V1.4 0.8VIL
Input Low Voltage
V2.4 1.7VIH
Input High Voltage
UNITSMIN TYP MAXSYMBOLPARAMETER
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= +25°C.)
(Note 2)
VEN = VA_ = VLATCH = VCAL = 0
or V+, V+ = 5.5V, V- = -5.5V
(Note 7)
µA
-5 5
I+Positive Supply Current -1 0.01 1
V±2.7 ±6Power-Supply Range
VEN = VA_ = VLATCH = VCAL = 0 µA-0.1 0.01 0.1IIL
Input Current with Input
Voltage Low
Figure 2 ns
410
tOPEN
Break-Before-Make
Interval (Note 3)
100 150
TA= +25°C
TA= TMIN to TMAX
VEN = VA_ = VLATCH = VCAL = 0
or V+, V+ = 5.5V, V- = -5.5V
(Note 7) TA= TMIN to TMAX
µA
-5 5
I-Negative Supply Current -1 0.01 1TA= +25°C
VEN = VA_ = VLATCH = VCAL = 0
or V+, V+ = 5.5V, V- = -5.5V
(Note 7) TA= TMIN to TMAX
µA
-5 5
IGND
GND Supply Current -1 0.01 1TA= +25°C
TA= +25°C
TA= +25°C
50 100
75 115TA= +25°C
TA= +25°C
VEN = 0, f = 1MHz, Figure 5
CL= 1nF, VNO_ = 0, Figure 4
dB-75VISO
Off-Isolation (Note 8)
pC15VCTE
Charge Injection
(Note 3) TA= +25°C
TA= +25°C
f = 1MHz
VEN = 2.4V, f = 1MHz,
VGEN = 1Vp-p, Figure 5
pF15CIN
Logic Input Capacitance
dB-75VCT
Crosstalk Between
Channels (Note 9) TA= +25°C
TA= +25°C
f = 1MHz, VEN = VCOM_ = 0,
Figure 6 pF3COFF
NO-Off Capacitance TA= +25°C
f = 1MHz, VEN = 2.4V,
VCOM_ = 0, Figure 6
f = 1MHz, VEN = VCOM_ = 0,
Figure 6
pF26CCOM_(ON)
COM-On Capacitance
pF15CCOM_(OFF)
COM-Off Capacitance TA= +25°C
TA= +25°C
Figure 3 ns
175
tON
Enable Turn-On Time TA= TMIN to TMAX
Figure 3 ns
120
tOFF
Enable Turn-Off Time TA= TMIN to TMAX
TA= TMIN to TMAX
Figure 1 ns
200
tTRANS
Transition Time TA= TMIN to TMAX
1
LOGIC INPUTS
SUPPLY
DYNAMIC CHARACTERISTICS
MAX4539/MAX4540
Low-Voltage, Single 8-to-1 and
Dual 4-to-1 Cal-Multiplexers
4 _______________________________________________________________________________________
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= +25°C.)
(Note 2)
TA= +25°C
Additional Positive Supply
Current
V+ / V+ /
24k 13k
(V+ / 2) divider active,
VIH = V+, VIL = 0 (Note 3)
TA= TMIN to TMAX
Enable Setup Time tES 40 nsFigure 8 TA= +25°C 15 30
TA= TMIN to TMAX
(V+ - V-) Divider Output 2544/ 2560/ 2576/
4096 4096 4096
Referenced to V- LSB
TA= +25°C 2544/ 2560/ 2576/
4096 4096 4096
TA= TMIN to TMAX
(V+ / 2) Divider Output 2032/ 2048/ 2064/
4096 4096 4096
Referenced to GND LSB
TA= +25°C 2032/ 2048/ 2064/
4096 4096 4096
TA= TMIN to TMAX
Gain Divider Output 4080.9/ 4081/ 4081.1/
4096 4096 4096
VREF = 4.096V,
REFHI = 4.096V,
REFLO = GND
LSB
TA= +25°C 4080.9/ 4081/ 4081.1/
4096 4096 4096
TA= TMIN to TMAX
Offset Divider Output 14.9/ 15/ 15.1/
4096 4096 4096
VREF = 4.096V,
REFHI = 4.096V,
REFLO = GND
TA= +25°C
Output Resistance
(V+ - V-) Divider 69kΩ(Note 3)
TA= +25°C
Output Resistance Gain
Divider 400 800 Ω(Note 3)
LSB
TA= +25°C 14.9/ 15/ 15.1/
4096 4096 4096
TA= TMIN to TMAX
Pulse Width, Latch
Enable tMPW 40 nsFigure 7
TA= TMIN to TMAX
Setup Time tS
PARAMETER SYMBOL MIN TYP MAX UNITS
TA= +25°C
Output Resistance
(REFHI, REFLO, GND) 400 800 Ω(Note 3)
TA= +25°C
Output Resistance
(V+ / 2) Divider 69kΩ(Note 3)
TA= +25°C
Output Resistance Offset
Divider 400 800 Ω(Note 3)
TA= +25°C
80 ns
TA= TMIN to TMAX
Figure 7
30 15
TA= +25°C
TA= +25°C 45 70
Hold Time tH-10 0 ns
-10
Figure 7
CONDITIONS
mA
LATCH TIMING (Note 3)
INTERNAL DIVIDERS
TA= TMIN to TMAX
MAX4539/MAX4540
Low-Voltage, Single 8-to-1 and
Dual 4-to-1 Cal-Multiplexers
_______________________________________________________________________________________ 5
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= +25°C.)
(Note 2)
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= +25°C.) (Note 2)
-10 10
-0.2 0.2
TA= +25°C
-10 10
TA= TMIN to TMAX
(Note 3)
VCOM_ = 4.5V, 1V;
VNO_ = 1V, 4.5V;
V+ = 5.5V
nA
-5 5
-0.2 0.2
TA= +25°C
ICOM_ = 1mA; VNO_ = 3V, 2V, 1V;
V+ = 4.5V
ICOM_ = 1mA, VNO_ = 3.0V,
V+ = 4.5V
TA= +25°C
ICOM_ = 1mA, VNO_ = 3.0V,
V+ = 4.5V
nA
TA= TMIN to TMAX
-5 5
CONDITIONS
ICOM_(OFF)
ICOM_(ON)
-0.1 0.1
TA= TMIN to TMAX
COM-Off Leakage
Current (Notes 6, 10)
TA= +25°C
VCOM_ = 4.5V,
VNO_ = 4.5V,
V+ = 5.5V
TA= +25°C
TA= TMIN to TMAX
MAX4539
-0.1 0.1
TA= +25°C
COM-On Leakage
Current (Notes 6, 10)
TA= TMIN to TMAX
MAX4540
TA= +25°C
TA= TMIN to TMAX
MAX4539
TA= +25°C
TA= TMIN to TMAX
MAX4540
80 150
V0V+
VNO_,
VCOM_
Analog-Signal Range
ΩRFLAT
VCOM_ = 1V, 4.5V;
VNO_ = 4.5V, 1V; V+ = 5.5V
Ω
200
RON
On-Resistance
28
On-Resistance Matching
Between Channels
(Notes 3, 4) Ω
12
∆RON
8
On-Resistance Flatness
(Note 5)
UNITSMIN TYP MAXSYMBOLPARAMETER
nA
-2 2
INO(OFF) -0.1 0.1
NO-Off Leakage Current
(Notes 6, 10)
SWITCH
TA= +25°C
Additional Negative
Supply Current
(V+ - V-)/ (V+ - V-)/
24k 13k mA
(V+ - V-) divider active,
VIH = V+, VIL = 0 (Note 3)
TA= +25°C
Additional Positive Supply
Current (Note 3)
(V+ - V-)/ (V+ - V-)/
24k 13k mA
PARAMETER SYMBOL MIN TYP MAX UNITS
(V+ - V-) divider active,
VIH = V+, VIL = 0
TA= +25°C
Input Resistance
(REFHI, REFLO) (Note 3) 25 40 kΩ
Offset divider active,
gain divider active
REFHI, REFLO Input
Range (Note 3)
V- V+
- 0.3 + 0.3 V
CONDITIONS
MAX4539/MAX4540
Low-Voltage, Single 8-to-1 and
Dual 4-to-1 Cal-Multiplexers
6 _______________________________________________________________________________________
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= +25°C.) (Note 2)
VEN = VA_ = VLATCH = VCAL = 0
or V+, V+ = 5.5V TA= TMIN to TMAX
µA
-5 5
I+
Positive Supply Current
(Note 3)
-1 0.01 1
V2.7 12Power-Supply Range
VEN = VA_ = VLATCH = VCAL = 0
CONDITIONS
µA-0.1 0.1IIL
Input Current with
Input Voltage Low
VEN = VA_ = VLATCH = VCAL = V+
Figure 2 1ns
410
tOPEN
Break-Before-Make
Interval
µA-0.1 0.1IIH
Input Current with
Input Voltage High
150 200
TA= +25°C
VEN = VA_ = VLATCH = VCAL = 0
or V+, V+ = 5.5V TA= TMIN to TMAX µA
-10 10
IGND
GND Supply Current
(Note 3)
-1 0.01 1TA= +25°C
TA= +25°C
TA= +25°C
60 100
Figure 1
TA= TMIN to TMAX
115 150
ns
250
TA= +25°C
TA= +25°C
CL= 1nF, VNO_ = 0, Figure 4 pC15VCTE
Charge Injection TA= +25°C
V1.4 0.8VIL
Input Low Voltage
V2.4 1.6VIH
Input High Voltage
70TA= +25°C
UNITSMIN TYP MAXSYMBOLPARAMETER
tTRANS
Transition Time TA= TMIN to TMAX
Figure 3 ns
200
tON
Enable Turn-On Time TA= TMIN to TMAX
Figure 3 ns
130
tOFF
Enable Turn-Off Time TA= TMIN to TMAX
Figure 7 80
tS
Setup Time TA= TMIN to TMAX
Figure 7 ns
-10
tH
Hold Time TA= TMIN to TMAX
-10 0TA= +25°C
Figure 7 ns
40
tMPW TA= TMIN to TMAX
30 15
Pulse Width, Latch
Enable
TA= +25°C
ns
Figure 8 ns
40
tES TA= TMIN to TMAX
15 30
Enable Setup Time TA= +25°C
LOGIC INPUTS (Note 3)
SUPPLY
DYNAMIC CHARACTERISTICS (Note 3)
LATCH TIMING (Note 3)
MAX4539/MAX4540
Low-Voltage, Single 8-to-1 and
Dual 4-to-1 Cal-Multiplexers
_______________________________________________________________________________________ 7
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= +25°C.
Note 7: If the logic inputs can float during power-on, connect a 1MΩpull-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.
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= +25°C.)
(Note 2)
TA= +25°CEnable Setup Time 50tES nsFigure 8
Input High Voltage VIH 2.4 1.1 V
Input Low Voltage VIL 1.1 0.5 V
Transition Time tTRANS ns
VNO1 = 1.5V, VNO8 = 0,
Figure 1 TA= +25°C 260 400
Enable Turn-Off Time tOFF 100 150 nsVNO = 1.5V, Figure 3
Enable Turn-On Time tON 220 350 nsVNO1 = 1.5V, Figure 3
TA= +25°C
Pulse Width, Latch
Enable
TA= TMIN to TMAX
On-Resistance RON
40
PARAMETER SYMBOL MIN TYP MAX UNITS
tMPW nsFigure 7
TA= +25°C
TA= +25°C
100
TA= +25°C
TA= +25°C
600
Ω
-10 0
ICOM_ = 0.2mA, VNO_ = 1.5V,
V+ = 2.7V
ns
TA= +25°C
Hold Time tHnsFigure 7
Setup Time
220 500
tS
CONDITIONS
Figure 7
V0V+VCOM_
Analog-Signal Range (Note 3)
SWITCH
LATCH TIMING (Note 3)
LOGIC INPUTS (Note 3)
DYNAMIC (Note 3)
MAX4539/MAX4540
Low-Voltage, Single 8-to-1 and
Dual 4-to-1 Cal-Multiplexers
8 _______________________________________________________________________________________
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
100n
10f
-40 -20 0 20 40 60 80 100 120
LEAKAGE CURRENT vs. TEMPERATURE
100f
MAX4539-01
TEMPERATURE (°C)
LEAKAGE CURRENT (A)
10p
1p
100p
10n
1n
V+ = 5V
V- = -5V
COM(OFF)
NO(OFF)
COM(ON)
0
10
20
30
50
60
40
70
80
90
100
0 1.0 1.5 2.00.5 2.5 3.0 3.5 4.54.0 5.0
ON-RESISTANCE vs. VCOM AND TEMPERATURE
(SINGLE SUPPLY)
MAX4539-02
VCOM (V)
RON (Ω)
TA = +85°C
TA = +70°C
TA = +25°C
TA = -40°C
V+ = 5V
V- = 0
0
10
20
30
40
50
60
-5 -3 -2 -1-4 012 435
ON-RESISTANCE vs. VCOM AND TEMPERATURE
(DUAL SUPPLIES)
MAX4539-03
VCOM (V)
RON (Ω)
TA = +85°C
TA = +70°C
TA = +25°C TA = -40°C
V+ = 5V
V- = -5V
30
50
40
60
90
100
80
70
110
-5 -3 -2 -1 0-4 12345
ON-RESISTANCE vs. VCOM
(DUAL SUPPLIES)
MAX4539-04
VCOM (V)
RON (Ω)
V+ = 2.7V
V- = -2.7V
V+ = 3V
V- = -3V
V+ = 5V
V- = -5V
V+ = 2.4V
V- = -2.4V
0
40
20
60
140
160
120
100
80
180
234 5
ON/OFF TIME vs. SUPPLY VOLTAGE
MAX4539-07
V+, V- (V)
tON, tOFF (ns)
tON
tOFF
30
70
50
90
150
170
130
110
190
0 23451 678910
ON-RESISTANCE vs. VCOM
(SINGLE SUPPLY)
MAX4539-05
VCOM (V)
RON (Ω)
V+ = 2.7V
V+ = 3V
V+ = 5V
V+ = 7.5V
V+ = 10V
V- = 0
100n
0.1p
-40 -20 0 20 40 60 80 100 120 140
SUPPLY CURRENT vs. TEMPERATURE
10p
1p
MAX4539-06
TEMPERATURE (°C)
I+ I- (A)
100p
1n
10n
I-
I+
V+ = 5V
V- = -5V
-40
-20
0
60
80
40
20
100
-40 -20 0 20 40 60 80 100
ON/OFF TIME vs. TEMPERATURE
MAX4539-08
TEMPERATURE (°C)
tON, tOFF (ns)
tON
V+ = 5V
V- = -5V
tOFF
-2
4
2
0
6
8
10
-5 -1-2-4-3 012345
CHARGE INJECTION vs. VCOM
MAX4539-09
VCOM (V)
Q (pC)
DUAL SUPPLIES
V+ = 5V, V- = -5V
SINGLE SUPPLY
V+ = 5V
MAX4539/MAX4540
Low-Voltage, Single 8-to-1 and
Dual 4-to-1 Cal-Multiplexers
_______________________________________________________________________________________
9
0
-90
0.1 10 1001 1000
FREQUENCY RESPONSE
-70
-80
MAX4539-10
FREQUENCY (MHz)
LOSS (dB)
-50
-60
-40
-30
-10
-20
180
-180
-100
-140
PHASE (DEGREES)
-20
-60
20
60
140
100
INSERTION
LOSS
V+ = 5V
V- = -5V
ON
PHASE
OFF
ISOLATION
0.1
0.001
10 1k 10k100 100k
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
MAX4539-11
FREQUENCY (Hz)
THD (%)
0.01
V+ = 5V
V- = -5V
600Ω IN/OUT
VIN = 5Vp-p
5680
5830
5780
5730
5930
5880
5980
6030
ROUT vs. TEMPERATURE
(V+ / 2 DIVIDER AND V+ - V- DIVIDER)
MAX4539-12
TEMPERATURE (°C)
ROUT (Ω)
-40 -20 0 20 40 60 80 100
V+ = 5V
V- = -5V
(V+ / 2) ROUT
(V+ - V-) ROUT
2049.0
2049.5
2050.0
(V+ / 2) DIVIDER OUTPUT
vs. TEMPERATURE
MAX4539-13a
TEMPERATURE (°C)
OUTPUT RATIO (LSB)
-40 -20 0 20 40 60 80 100
V+ = +5V
V- = -5V
14.90
14.98
14.96
14.94
14.92
15.06
15.04
15.02
15.00
15.10
15.08
OFFSET DIVIDER OUTPUT
vs. TEMPERATURE
MAX4539-15
TEMPERATURE (°C)
OUTPUT RATIO (LSB)
-40 -20 0 20 40 60 80 100
VREFHI = 4.096V
VREFLO = 0
V+ = 5V
V- = -5V
2558.0
2558.2
2558.1
2558.4
2558.3
2558.5
(V+ - V-) DIVIDER OUTPUT
vs. TEMPERATURE
MAX4539-13b
TEMPERATURE (°C)
OUTPUT RATIO (LSB)
-40 -20 0 20 40 60 80 100
V+ = 5V
V- = -5V
4080.90
4080.98
4080.96
4080.94
4080.92
4081.06
4081.04
4081.02
4081.00
4081.10
4081.08
GAIN DIVIDER OUTPUT
vs. TEMPERATURE
MAX4539-14
TEMPERATURE (°C)
OUTPUT RATIO (LSB)
-40 -20 0 20 40 60 80 100
VREFHI = 4.096V
VREFLO = 0
V+ = 5V
V- = -5V
4080.90
4080.98
4080.96
4080.94
4080.92
4081.06
4081.04
4081.02
4081.00
4081.10
4081.08
2.0 3.52.5 3.0 4.0 4.5 5.0
GAIN DIVIDER OUTPUT vs. REFHI
MAX4539-16
REFHI (V)
OUTPUT RATIO (LSB)
VREFLO = 0
V+ = 5V
V- = -5V or 0
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
14.90
14.98
14.96
14.94
14.92
15.06
15.04
15.02
15.00
15.10
15.08
2.0 3.52.5 3.0 4.0 4.5 5.0
OFFSET DIVIDER OUTPUT vs. REFHI
MAX4539-17
REFHI (V)
OUTPUT RATIO (LSB)
VREFLO = 0
V+ = 5V
V- = -5V or 0
MAX4539/MAX4540
Low-Voltage, Single 8-to-1 and
Dual 4-to-1 Cal-Multiplexers
10 ______________________________________________________________________________________
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
Pin Descriptions
PIN
Positive Supply VoltageV+1
FUNCTIONNAME
GroundGND2
MAX4539 (Single 8-to-1 Cal-Mux)
Reference High Voltage InputREFHI4
Negative Supply VoltageV-3
Multiplexer OutputCOM6
Channel Input 2NO28
Channel Input 1NO17
Reference Low Voltage InputREFLO5
Channel Input 4NO410
Channel Input 6NO612
Channel Input 5NO511
Channel Input 8NO814
Address Bit 1A116
Address Bit 2A215
Channel Input 7NO713
Channel Input 3NO39
Calibration Control InputCAL18
Address Latch Control InputLATCH20
Multiplexer EnableEN19
Address Bit 0A017
MAX4540 (Dual 4-to-1 Cal-Mux)
GroundGND2
Reference High Voltage InputREFHI4
Negative Supply VoltageV-3
Multiplexer Output ACOMA6
Channel Input 2ANO2A8
Channel Input 1ANO1A7
Reference Low Voltage InputREFLO5
Channel Input 4ANO4A10
Channel Input 2BNO2B12
Channel Input 1BNO1B11
Channel Input 4BNO4B14
PIN
Address Bit 1A116
Positive Supply VoltageV+1
FUNCTIONNAME
Multiplexer Output BCOMB15
Channel Input 3BNO3B13
Channel Input 3ANO3A9
Calibration Control InputCAL18
Address Latch Control InputLATCH20
Multiplexer EnableEN19
Address Bit 0A017
190
210
200
230
220
250
240
260
ROUT vs. TEMPERATURE
(OFFSET DIVIDER AND GAIN DIVIDER)
MAX4539-18
TEMPERATURE (°C)
ROUT (Ω)
-40 -20 0 20 40 60 80 100
V+ = 5V
V- = -5V
VREFHI = 4.096V
VREFLO = 0
GAIN DIVIDER
OFFSET DIVIDER
2045
2049
2048
2047
2046
2053
2052
2051
2050
2055
2054
24356
(V+ / 2) DIVIDER OUTPUT
vs. SUPPLY VOLTAGE
MAX4539-19a
V+, V- (V)
OUTPUT RATIO (LSB)
2550
2555
2560
2565
13245
(V+ - V-) DIVIDER OUTPUT
vs. SUPPLY VOLTAGE
MAX4539-19b
V+, V- (V)
OUTPUT RATIO (LSB)
MAX4539/MAX4540
Low-Voltage, Single 8-to-1 and
Dual 4-to-1 Cal-Multiplexers
______________________________________________________________________________________ 11
Truth Tables
MAX4539 (Single 8-to-1 Cal-Mux)
State is latched when LATCH is high.X
NO20
NO10
NO40
NO60
NO50
NO30
NO80
REFHI1
(V+ / 2) Divider Mode, VCOM = 2048/4096 V+1
(V+ - V-) Divider Mode , VCOM = 2560/4096 (V+ - V-)1
CAL
Gain Divider Mode, VCOM = 4081/4096 (VREFHI - VREFLO)1
All switches and dividers open. COM is high-Z. Latch contents set
to all 1’s.
X
COM
GND1
REFLO1
NO70
All switches and dividers open. COM is high-Z.1
Offset Divider Mode, VCOM = 15/4096 (VREFHI - VREFLO)1
X
0
0
0
1
1
0
1
0
0
0
A2
1
X
1
0
1
1
1
X
0
0
1
0
0
1
1
0
0
1
A1
0
X
0
1
1
1
1
X
1
0
1
1
0
0
1
1
0
1
A0
1
X
0
0
0
1
0
1
1
1
1
1
1
1
1
1
1
1
EN
1
0
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
LATCH
0
X
0
0
0
0
0
MAX4540 (Dual 4-to-1 Cal-Mux)
State is latchedX
NO2A0
NO1A0
NO4A0
Gain Divider Mode1
GND1
NO3A0
All switches and dividers open.
COMA is high-Z.
1
CAL
All switches and dividers open.
COMA is high-Z.
COMA
X
Offset Divider Mode1
X
0
0
1
0
0
1
1
A1
X
1
X
1
0
1
1
0
0
1
A0
X
0
1
1
1
1
1
1
1
1
EN
0
1
1
0
0
0
0
0
0
0
LATCH
X
0
State is latched
NO2B
NO1B
NO4B
REFLO
GND
NO3B
All switches and dividers open.
COMB is high-Z.
All switches and dividers open.
COMB is high-Z.
COMB
REFLO
X = Don’t care
X = Don’t care
MAX4539/MAX4540
Low-Voltage, Single 8-to-1 and
Dual 4-to-1 Cal-Multiplexers
12 ______________________________________________________________________________________
Detailed Description
The MAX4539/MAX4540 are multiplexers with addition-
al calibration features. Internal resistor-dividers gener-
ate accurate voltage ratios from an external voltage
reference, allowing zero- and full-scale calibration of
ADC systems as well as facilitation of system self-moni-
toring. 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.
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 volt-
age ratio that is 4081/4096 of VREFHI - VREFLO, accu-
rate 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 measure-
ment 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 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 sup-
plies 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 sig-
nal pin are identical, and therefore fairly well bal-
anced, 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 cur-
rent 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 logic-
level 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 thresh-
olds, 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- com-
patible 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.
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” sup-
plies 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.
MAX4539/MAX4540
Low-Voltage, Single 8-to-1 and
Dual 4-to-1 Cal-Multiplexers
______________________________________________________________________________________ 13
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 sig-
nificantly when departing from ±5V. As the overall sup-
ply 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.
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 inadvertently turn on, causing higher supply current
(~200µA supply current) when the enable input is tog-
gled. Avoid this condition by ensuring that EN pin stays
low until the remaining logic inputs are valid. To accom-
plish 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 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 sig-
nals on COM_ can exceed ±0.3V. Voltages beyond
±0.3V cause the internal ESD-protection diodes to con-
duct, and the parts can be damaged if excessive cur-
rent flows.
Chip Information
TRANSISTOR COUNT: 561
Test Circuits/Timing Diagrams
50% 50%
tR < 20ns
tF < 20ns
VCOM
V+
0V
VNO1, VNO1B
0V
VNO8, VNO4B
LOGIC
INPUT
VEN
SWITCH
OUTPUT
+5V
-5V
GND
V+
V+
V+
A1
A2 V-
EN
LATCH
CAL
A0
NO1
NO2–NO7
NO8
COM
+3V
-3V
50Ω
MAX4539
300Ω35pF
A1
A0
+5V
VCOM
VCOM
-5V
GND
V+
V-
EN NO1B
NO2B–NO3B
NO1A–NO2A
NO4B
COMB
+3V
50Ω
MAX4540
300Ω35pF
90%
90%
tTRANS tTRANS
-3V
LATCH
CAL
Figure 1. Transition Time
MAX4539/MAX4540
Low-Voltage, Single 8-to-1 and
Dual 4-to-1 Cal-Multiplexers
14 ______________________________________________________________________________________
Test Circuits/Timing Diagrams (continued)
50% 50%
50%
tOPEN
tR < 20ns
tF < 20ns
0.8VNO_
V+
0V
LOGIC
INPUT
VA
SWITCH
OUTPUT
VCOM
+5V
VCOM
-5V
GND
V+
V-
A0
A1
A2
EN
NO1–NO8
COM
+3V
50Ω
MAX4539
300Ω35pF
90%
V+
0V
VA
LATCH
CAL
50%
90% 90%
tOPEN
tR < 20ns
tF < 20ns
0.8VNO_
V+
0V
LOGIC
INPUT
VA
SWITCH
OUTPUT
VCOM
+5V
VCOM
-5V
GND
V+
V-
A0
A1
EN
NO1A–NO4B
NO1B–NO4B
COMA
+3V
50Ω
MAX4540
300Ω35pF
0V
VA
V+
LATCH
CAL
Figure 2. Break-Before-Make Interval
50% 50%
tOFF
tR < 20ns
tF < 20ns
V+
0V
0V
VEN
VCOM
+5V
VCOM
-5V
GND
V+
A1
V-
A0
A1
EN
LATCH
CAL
NO1
NO2–NO8
COM
+3V
50Ω
MAX4539
300Ω35pF
A2
90%90%
tON
+5V
VCOM
-5V
GND
V+
A0
V-
EN NO1B
NO2B–NO4B
NO1A–NO4A
COMB
+3V
50Ω
MAX4540
300Ω35pF
VEN
VEN
0.8(VNO1, VNO1B)
LATCH
CAL
Figure 3. Enable Switching Time
MAX4539/MAX4540
Low-Voltage, Single 8-to-1 and
Dual 4-to-1 Cal-Multiplexers
______________________________________________________________________________________ 15
∆VOUT
V+
0V
LOGIC
INPUT
VEN
+5V
VCOM
-5V
GND
V+
A1
V-
A0
EN
COM
MAX4539
CL = 1nF VCOM
NO_
CHANNEL
SELECT
RS
VS
OFFON ON
∆VOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER
ERROR Q WHEN THE CHANNEL TURNS OFF.
Q = ∆VOUT x CL
A2
CAL
LATCH
∆VOUT
V+
0V
LOGIC
INPUT
VEN
+5V
VCOM_
GND
V+
A1
V-
A0
EN
COMA
MAX4540
CL = 1nF VCOM
NO_
CHANNEL
SELECT
RS
VS
OFFON ON
∆VOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER
ERROR Q WHEN THE CHANNEL TURNS OFF.
Q = ∆VOUT x CL
CAL
LATCH
-5V
Figure 4. Charge Injection
Test Circuits/Timing Diagrams (continued)
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.
NOTES:
+5V
V+
V+
VCOM
GND
V-
CALLATCH
+5V
10nF
V+
A
EN NO_
COM_
VIN
MAX4539
MAX4540
OFF ISOLATION = 20log VOUT
VIN
CROSSTALK = 20log VOUT
VIN
NETWORK
ANALYZER
50Ω
50Ω50Ω
50Ω
MEAS. REF
10nF
Figure 5. Off-Isolation/Crosstalk
MAX4539/MAX4540
Low-Voltage, Single 8-to-1 and
Dual 4-to-1 Cal-Multiplexers
16 ______________________________________________________________________________________
CAL,
GND
LATCH,
EN
+5V
-5V
V+
A2
V-
A1
A0
NO8
MAX4539
CHANNEL
SELECT
NO1
COM
1MHz
CAPACITANCE
ANALYZER
f = 1MHz
CAL,
GND
LATCH,
EN
+5V
-5V
V+
V-
A1
A0
NO4A
MAX4540
CHANNEL
SELECT
NO1A
COMA
1MHz
CAPACITANCE
ANALYZER
f = 1MHz
Figure 6. NO_/COM_ Capacitance
Test Circuits/Timing Diagrams (continued)
LATCH
VIH
VIL
ADDRESS (A_)
tS
tMPW 50%50%
tH
V+
V-
GND
V+
V-
A1
A2
CAL
EN
+3V
COM
LATCH
A0
MAX4539
NO2
NO1, NO3-NO8
Figure 7. Setup Time, Hold Time, Latch Pulse Width
Figure 8. Enable Setup Time
LATCH
EN
50%
50%
50%
tES
MAX4539/MAX4540
Low-Voltage, Single 8-to-1 and
Dual 4-to-1 Cal-Multiplexers
______________________________________________________________________________________ 17
Pin Configurations/Functional Diagrams (continued)
CAL
A0
A1
18
17
LATCH
EN
20
19
16
LOGIC
DECODER
GND
V+
V-
REFHI
REFLO
COMA
NO1A
NO2A
NO3A
NO4A
NO4B
COMB
NO3B
NO2B
NO1B
5
1
2
3
4
6
15
14
13
12
11
7
8
9
10
4081R
15R
4081R
15R
MAX4540
MAX4539/MAX4540
Low-Voltage, Single 8-to-1 and
Dual 4-to-1 Cal-Multiplexers
18 ______________________________________________________________________________________
Package Information
SSOP.EPS
MAX4539/MAX4540
Low-Voltage, Single 8-to-1 and
Dual 4-to-1 Cal-Multiplexers
______________________________________________________________________________________ 19
Package Information (continued)
PDIPN.EPS
MAX4539/MAX4540
Low-Voltage, Single 8-to-1 and
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
© 1999 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
Package Information (continued)
SOICW.EPS
