19-1396; Rev 0; 10/98
High-Voltage, Single 8-to-1/
Dual 4-to-1 Cal-Multiplexers
General Description
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 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 volt-
age, 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 com-
patibility when using a single +12V or dual ±15V sup-
plies. 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 switch-
es to 15Ω max. Each switch can handle Rail-to-Rail
®
analog signals. The off-leakage current is 20pA at T
A
=
+25°C and 1.25nA at T
A
= +85°C.
The MAX4578/MAX4579 are available in small 20-pin
SSOP, SO, and DIP 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
350Ω (max) R
ON
o
12Ω (max) R
ON
Matching Between Channels
o
10pC (max) Charge Injection
o
Guaranteed 20pA Off-Leakage Current
o
Rail-to-Rail Signal Handling
o
Small 20-Pin SSOP, SO, DIP Packages
MAX4578/MAX4579
Ordering Information
PART
MAX4578CAP
MAX4578CWP
MAX4578CPP
MAX4578EAP
MAX4578EWP
MAX4578EPP
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
20 SSOP
20 Wide SO
20 Plastic DIP
20 SSOP
20 Wide SO
20 Plastic DIP
Ordering Information continued at end of data sheet.
Applications
Data-Acquisition Systems
Test Equipment
Avionics
Audio Signal Routing
Networking
V+
GND
V-
REFHI
1
2
3
4
Pin Configurations/
Functional Diagrams
MAX4579
20
19
18
17
16
15R
4081R
LATCH
EN
CAL
A0
A1
LOGIC
DECODER
4081R
15R
REFLO
COMA
NO1A
NO2A
NO3A
NO4A
5
6
7
8
9
10
15
14
13
12
11
COMB
NO4B
NO3B
NO2B
NO1B
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
MAX4578 appears at end of data sheet.
1
________________________________________________________________
Maxim Integrated Products
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.
High-Voltage, Single 8-to-1/
Dual 4-to-1 Cal-Multiplexers
MAX4578/MAX4579
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 (T
A
= +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, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are
at T
A
= +25°C.) (Note 2)
-0.05
PARAMETER
0.05
0.005
SWITCH
Analog Signal Range
On-Resistance
On-Resistance Matching
Between Channels
(Note 4)
NO Off-Leakage Current
(Note 5)
V
COM_
,
V
NO_
R
DS(ON)
∆R
ON
(Note 3)
I
COM_
= 0.2mA, V
NO_
= ±10V,
V+ = 13.5V, V- = -13.5V
I
COM_
= 0.2mA, V
NO_
= ±10V,
V+ = 13.5V, V- = -13.5V
–
V
NO_
= +14V, V
COM_
= ±14V,
V+ = 16.5V, V- = -16.5V
MAX4578
MAX4579
MAX4578
MAX4579
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
-0.02
-1.25
-0.05
-6.5
-0.05
-3.25
-0.05
-6.5
-0.05
-3.25
0.008
0.006
0.005
0.005
0.001
4
V-
220
V+
350
475
12
15
0.02
1.25
0.05
6.5
0.05
3.25
0.05
6.5
0.05
3.25
nA
nA
nA
V
Ω
Ω
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
I
NO_(OFF)
COM Off-Leakage
Current (Note 5)
V
COM_
= ±14V,
–
V
NO_
= +14V,
I
COM_(OFF)
V+ = 16.5V,
V- = -16.5V
V
COM_
= ±14V,
V
NO_
= ±14V,
I
COM_(ON)
V+ = 16.5V,
V- = -16.5V
COM On-Leakage
Current (Note 5)
2
_______________________________________________________________________________________
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, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are
at T
A
= +25°C.) (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+
V
EN
= V
A_
= V
LATCH
= V
CAL
= 0
or V+, V+ = 16.5V, V- = -16.5V
(Note 6)
V
EN
= V
A_
= V
LATCH
= V
CAL
= 0
or V+, V+ = 16.5V, V- = -16.5V
(Note 6)
V
EN
= V
A_
= V
LATCH
= V
CAL
= 0
or V+, V+ = 16.5V, V- = -16.5V
(Note 6)
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
-1
-5
50
0.001
±4.5
50
±20
80
µA
120
1
µA
5
80
µA
120
V
V
IH
V
IL
I
IH
I
IL
V
EN
= V
A_
= V
LATCH
= V
CAL
= V+
V
EN
= V
A_
= V
LATCH
= V
CAL
= 0
-1
-1
2.4
1.9
1.9
0.001
0.001
0.8
1
1
V
V
µA
µA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX4578/MAX4579
Negative Supply Current
I-
GND Supply Current
I
GND
DYNAMIC CHARACTERISTICS
Transition Time
Break-Before-Make
Interval (Note 3)
Enable Turn-On Time
Enable Turn-Off Time
Charge Injection
(Note 3)
Off-Isolation
Crosstalk Between
Channels (Note 8)
Logic Input Capacitance
NO Off-Capacitance
COM Off-Capacitance
COM On-Capacitance
t
TRANS
t
OPEN
t
ON
t
OFF
V
CTE
V
ISO
V
CT
C
IN
C
OFF
C
COM_(OFF)
C
COM_(ON)
Figure 1
Figure 2
Figure 3
Figure 3
C
L
= 1nF, V
NO_
= 0, R
S
= 0,
Figure 4
V
EN
= 0, R
L
= 50Ω, Figure 5
V
EN
= 2.4V, f = 1MHz,
V
GEN
= 1Vp-p, Figure 5
f = 1MHz
f = 1MHz, V
EN
= 0,
Figure 6
f = 1MHz, V
EN
= 0,
Figure 6
f = 1MHz, V
EN
= 2.4V,
Figure 6
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
3.5
-75
-70
3
3
14
20
130
50
180
260
400
500
220
300
0
320
450
600
ns
ns
ns
ns
pC
dB
dB
pF
pF
pF
pF
_______________________________________________________________________________________
3
High-Voltage, Single 8-to-1/
Dual 4-to-1 Cal-Multiplexers
MAX4578/MAX4579
ELECTRICAL CHARACTERISTICS—Dual ±15V Supplies (continued)
(V+ = +15V ±10%, V- = -15V ±10%, logic levels = 2.4V and 0.8V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are
at T
A
= +25°C.) (Note 2)
PARAMETER
LATCH TIMING
(Note 3)
Setup Time
Hold Time
Enable Setup Time
Pulse Width, LATCH
Enable
INTERNAL DIVIDERS
V
REFHI
= 10V,
REFLO = GND
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
14.9 /
4096
14.9 /
4096
4080.9 /
4096
15 /
4096
15 /
4096
4081 /
4096
4081 /
4096
2048 /
4096
2048 /
4096
2560 /
4096
2560 /
4096
400
400
6
6
400
V+ /
24k
15.1 /
4096
LSB
15.1 /
4096
4081.1 /
4096
LSB
4080.9 /
T
A
= T
MIN
to T
MAX
4096
T
A
= +25°C
(V+ / 2) Divider Output
Referenced to GND
T
A
= T
MIN
to T
MAX
T
A
= +25°C
(V+ - V-) Divider Output
Referenced to V-
T
A
= T
MIN
to T
MAX
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)
(Note 3)
(V+ / 2) divider active,
V
IH
= V+, V
IL
= 0
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
2544 /
4096
2576 /
4096
800
800
9
9
800
V+ /
13k
Ω
Ω
kΩ
kΩ
Ω
mA
2032 /
4096
2544 /
4096
2064 /
4096
2576 /
4096
LSB
2032 /
4096
4081.1 /
4096
2064 /
4096
LSB
t
S
t
H
t
ES
t
MPW
Figure 7
Figure 7
Figure 8
Figure 7
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
120
180
72
-10
-10
22
40
60
0
70
200
250
ns
ns
ns
ns
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Offset Divider Output
Gain Divider Output
V
REFHI
= 10V,
REFLO = GND
4
_______________________________________________________________________________________
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, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 2)
PARAMETER
Additional Positive Supply
Current (Note 3)
Additional Negative
Supply Current (Note 3)
REFHI, REFLO Input
Range (Note 3)
Input Resistance
(REFHI, REFLO) (Note 3)
Offset divider active,
gain divider active
T
A
= +25°C
SYMBOL
CONDITIONS
(V+ - V-) divider active,
V
IH
= V+, V
IL
= 0
(V+ - V-) divider active,
V
IH
= V+, V
IL
= 0
T
A
= +25°C
T
A
= +25°C
V-
- 0.3
17
32
MIN
TYP
MAX
UNITS
mA
mA
V
kΩ
MAX4578/MAX4579
(V+ - V-) / (V+ - V-) /
24k
13k
(V+ - V-) / (V+ - V-) /
24k
13k
V+
+ 0.3
ELECTRICAL CHARACTERISTICS—Dual ±5V Supplies
(V+ = +5V ±10%, V- = -5V ±10%, logic levels = 2.4V and 0.8V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 2)
PARAMETER
SWITCH
Analog Signal Range
On-Resistance
On-Resistance Matching
Between Channels
(Note 4)
NO Off-Leakage Current
(Note 5)
COM Off-Leakage
Current (Note 5)
V
NO_
,
V
COM_
R
DS(ON)
(Note 3)
I
COM_
= 0.2mA, V
NO_
= ±3V,
V+ = 4.5V, V- = -4.5V
I
COM_
= 0.2mA, V
NO_
= 3.0V,
V+ = 4.5V, V- = -4.5V
–
V
NO_
= +4.5V, V
COM_
= ±4.5V,
V+ = 5.5V, V- = -5.5V
MAX4578
MAX4579
MAX4578
MAX4579
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
-0.02
-1.25
-0.05
-6.5
-0.5
-6.5
-0.05
-6.5
-0.05
-3.25
0.008
0.005
0.005
10
0.001
0.02
1.25
0.05
6.5
0.5
6.5
0.05
6.5
0.05
3.25
nA
nA
V-
660
V+
900
1100
V
Ω
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
∆R
DS(ON)
Ω
I
NO(OFF)
nA
V
COM_
= ±4.5V,
–
1V; V
NO_
= +4.5V,
I
COM_(OFF)
V+ = 5.5V,
V- = -5.5V
V
COM_
= ±4.5V,
V
NO_
= ±4.5V or
I
COM_(ON)
floating, V+ = 5.5V,
V- = -5.5V
COM On-Leakage
Current (Note 5)
_______________________________________________________________________________________
5
ARM技术
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
