MAXIM MAX4579EAP

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 (350Ω max) is matched between switches to 15Ω max. Each switch can handle Rail-to-Rail®
analog signals. The off-leakage current is 20pA at TA =
+25°C and 1.25nA at TA = +85°C.
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
♦ 350Ω (max) RON
♦ 12Ω (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
0°C to +70°C
20 SSOP
PIN-PACKAGE
MAX4578CWP
0°C to +70°C
20 Wide SO
MAX4578CPP
0°C to +70°C
20 Plastic DIP
MAX4578EAP
-40°C to +85°C
20 SSOP
MAX4578EWP
-40°C to +85°C
20 Wide SO
MAX4578EPP
-40°C to +85°C
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 = +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
MAX4578C_P/MAX4579C_P................................0°C to +70°C
MAX4578E_P/MAX4579E_P .............................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
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 ±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 = +25°C.) (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 = +25°C
On-Resistance Matching
Between Channels
(Note 4)
∆RON
ICOM_ = 0.2mA, VNO_ = ±10V,
V+ = 13.5V, V- = -13.5V
TA = +25°C
NO Off-Leakage Current
(Note 5)
INO_(OFF)
– 14V, VCOM_ = ±14V,
VNO_ = +
V+ = 16.5V, V- = -16.5V
TA = +25°C
-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
Ω
Ω
15
TA = +25°C
-0.05
TA = TMIN to TMAX
-6.5
TA = +25°C
-0.05
TA = TMIN to TMAX
-3.25
TA = +25°C
-0.05
TA = TMIN to TMAX
-6.5
TA = +25°C
-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 = +25°C.) (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
µA
-1
0.001
1
µA
±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 = +25°C
VEN = VA_ = VLATCH = VCAL = 0
or V+, V+ = 16.5V, V- = -16.5V
(Note 6)
TA = +25°C
-1
TA = TMIN to TMAX
-5
VEN = VA_ = VLATCH = VCAL = 0
or V+, V+ = 16.5V, V- = -16.5V
(Note 6)
TA = +25°C
50
80
µA
TA = TMIN to TMAX
120
0.001
1
µA
5
50
80
µA
TA = TMIN to TMAX
120
DYNAMIC CHARACTERISTICS
TA = +25°C
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 = +25°C
3.5
Off-Isolation
VISO
VEN = 0, RL = 50Ω, Figure 5
TA = +25°C
-75
dB
Crosstalk Between
Channels (Note 8)
VCT
VEN = 2.4V, f = 1MHz,
VGEN = 1Vp-p, Figure 5
TA = +25°C
-70
dB
Logic Input Capacitance
CIN
f = 1MHz
TA = +25°C
3
pF
COFF
f = 1MHz, VEN = 0,
Figure 6
TA = +25°C
3
pF
COM Off-Capacitance
CCOM_(OFF)
f = 1MHz, VEN = 0,
Figure 6
TA = +25°C
14
pF
COM On-Capacitance
CCOM_(ON)
f = 1MHz, VEN = 2.4V,
Figure 6
TA = +25°C
20
pF
NO Off-Capacitance
TA = TMIN to TMAX
TA = +25°C
TA = +25°C
600
50
180
260
TA = TMIN to TMAX
TA = +25°C
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 = +25°C.) (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 = +25°C
TA = TMIN to TMAX
250
TA = +25°C
-10
TA = TMIN to TMAX
-10
TA = +25°C
0
22
TA = TMIN to TMAX
ns
40
60
TA = +25°C
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 = +25°C
14.9 /
4096
15 /
4096
15.1 /
4096
TA = TMIN to TMAX
14.9 /
4096
15 /
4096
15.1 /
4096
TA = +25°C
4080.9 /
4096
4081 /
4096
4081.1 /
4096
TA = TMIN to TMAX
4080.9 /
4096
4081 /
4096
4081.1 /
4096
TA = +25°C
2032 /
4096
2048 /
4096
2064 /
4096
TA = TMIN to TMAX
2032 /
4096
2048 /
4096
2064 /
4096
TA = +25°C
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 = +25°C
400
800
Ω
Output Resistance Gain
Divider
(Note 3)
TA = +25°C
400
800
Ω
Output Resistance
(V+ / 2) Divider
(Note 3)
TA = +25°C
6
9
kΩ
Output Resistance
(V+ - V-) Divider
(Note 3)
TA = +25°C
6
9
kΩ
Output Resistance
(REFHI, REFLO, GND)
(Note 3)
TA = +25°C
400
800
Ω
Additional Positive Supply
Current (Note 3)
(V+ / 2) divider active,
VIH = V+, VIL = 0
TA = +25°C
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 = +25°C.) (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 = +25°C
(V+ - V-) / (V+ - V-) /
24k
13k
mA
V- 0.3
Offset divider active,
gain divider active
UNITS
TA = +25°C
REFHI, REFLO Input
Range (Note 3)
Input Resistance
(REFHI, REFLO) (Note 3)
MAX
(V+ - V-) / (V+ - V-) /
24k
13k
TA = +25°C
17
V+
+ 0.3
32
V
kΩ
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 = +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V+
V
900
Ω
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 = +25°C
660
TA = TMIN to TMAX
1100
TA = +25°C
Ω
10
TA = +25°C
-0.02
TA = TMIN to TMAX
-1.25
TA = +25°C
-0.05
TA = TMIN to TMAX
-6.5
TA = +25°C
-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 = +25°C
-0.05
TA = TMIN to TMAX
-6.5
6.5
TA = +25°C
-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 = +25°C.) (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
µA
-1.0
0.001
1.0
µA
1.0
1.8
DYNAMIC CHARACTERISTICS (Note 3)
TA = +25°C
Transition Time
tTRANS
VNO1 = 3V, VNO8 = 0,
Figure 1
TA = TMIN to TMAX
Break-Before-Make
Interval
tOPEN
Figure 2
TA = +25°C
Enable Turn-On Time
tON
VNO1 = 3V, Figure 3
Enable Turn-Off Time
tOFF
VNO1 = 3V, Figure 3
2.2
200
TA = +25°C
440
0.675
TA = TMIN to TMAX
ns
1.2
1.5
TA = +25°C
0.5
TA = TMIN to TMAX
µs
1.0
1.3
µs
µs
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 = +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V+
V
750
Ω
SWITCH
Analog Signal Range
VNO_,
VCOM_
(Note 3)
0
TA = +25°C
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 = +25°C
NO Off-Leakage Current
(Notes 5, 9)
INO(OFF)
VCOM_ = 1V, 11V;
VNO_ = 11V, 1V
TA = +25°C
-0.02
TA = TMIN to TMAX
-1.25
6
TA = TMIN to TMAX
850
Ω
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 = +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
TA = +25°C
-0.05
0.005
0.05
TA = TMIN to TMAX
-6.5
TA = +25°C
-0.05
0.005
0.05
TA = TMIN to TMAX
-3.25
TA = +25°C
-0.05
TA = TMIN to TMAX
-6.5
6.5
TA = +25°C
-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
µA
-1
0.001
1
µA
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 = +25°C
600
TA = TMIN to TMAX
TA = +25°C
TA = +25°C
120
400
540
TA = TMIN to TMAX
TA = +25°C
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 = +25°C.
Note 6: If the logic inputs can float during power-on, connect a 1MΩ 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 = +25°C, unless otherwise noted.)
ON-RESISTANCE vs. VCOM AND
TEMPERATURE (±15V DUAL SUPPLIES)
300
RON (Ω)
RON (Ω)
550
450
200
TA = +25°C
150
±7.5V
±12V
350
TA = +70°C
500
TA = +25°C
400
300
TA = -40°C
100
±10V
250
TA = +85°C
TA = +70°C
600
TA = +85°C
250
V+ = +5V
V- = -5V
700
RON (Ω)
±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 = -40°C
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 = +85°C
1800
1600
TA = +70°C
1400
1300
1100
+7.5V
+10V
700
TA = +85°C
500
TA = +25°C
1200
TA = -40°C
1000
300
300
600
200
7.5
10
TA = -40°C
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+
100µ
8
10
700
600
500
10
tON, tOFF (ns)
10µ
ICOM (OFF)
I+, I- (A)
1
0.1
ICOM (ON)
1µ
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 = +25°C
800
200
2.5
TA = +70°C
400
400
+12V
500
600
MAX4578/79 TOC 09
900
700
RON (Ω)
RON (Ω)
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 (Ω)
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 = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(TA = +25°C, 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 (Ω)
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 (Ω)
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-
50Ω
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
50Ω
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
50Ω
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
50Ω
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
50Ω
V-
10pF
NO1B
GND
0.8(VNO1, VNO1B)
VCOM
+5V
0V
tON
MAX4579
A1
50Ω
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
50Ω
50Ω
OFF-ISOLATION = 20log
VOUT
VIN
CROSSTALK = 20log
VOUT
VIN
NO_
MAX4578
MAX4579
V+
VCOM
MEAS.
REF
COM_
A
LATCH CAL V- GND
50Ω
50Ω
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
0°C to +70°C
20 SSOP
PIN-PACKAGE
MAX4579CWP
0°C to +70°C
20 SO Wide
MAX4579CPP
0°C to +70°C
20 Plastic DIP
MAX4579EAP
-40°C to +85°C
20 SSOP
MAX4579EWP
-40°C to +85°C
20 SO Wide
MAX4579EPP
-40°C to +85°C
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
© 1998 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.