MAXIM MAX4578, MAX4579 User Manual
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.
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 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.
Applications
Data-Acquisition Systems
Test Equipment
Avionics
Audio Signal Routing
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
♦ 350
Ω (max) R
ON
♦ 12Ω (max) RONMatching Between Channels
♦ 10pC (max) Charge Injection
♦ Guaranteed 20pA Off-Leakage Current
♦ Rail-to-Rail Signal Handling
♦ Small 20-Pin SSOP, SO, DIP Packages
MAX4578/MAX4579
High-Voltage, Single 8-to-1/
Dual 4-to-1 Cal-Multiplexers
________________________________________________________________
Maxim Integrated Products
1
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
MAX4579
19-1396; Rev 0; 10/98
PART
MAX4578CAP
0°C to +70°C
TEMP. RANGE PIN-PACKAGE
20 SSOP
Ordering Information continued at end of data sheet.
Pin Configurations/
Functional Diagrams
Ordering Information
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
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
MAX4578 appears at end of data sheet.
MAX4578/MAX4579
High-Voltage, Single 8-to-1/
Dual 4-to-1 Cal-Multiplexers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS—Dual ±15V Supplies
(V+ = +15V ±10%, V- = -15V ±10%, logic levels = 2.4V and 0.8V, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are
at T
A
= +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.
(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.
-0.05 0.005 0.05
MAX4579
TA= T
MIN
to T
MAX
TA= +25°C
TA= T
MIN
to T
MAX
MAX4578
TA= +25°C
TA= T
MIN
to T
MAX
TA= +25°C
TA= T
MIN
to T
MAX
TA= +25°C
TA= T
MIN
to T
MAX
TA= +25°C
COM Off-Leakage
Current (Note 5)
-0.05 0.005 0.05
I
COM_(OFF)
-3.25 3.25
nA
-0.05 0.005 0.05
V
COM_
= ±14V,
V
NO_
=
–
+
14V,
V+ = 16.5V,
V- = -16.5V
-6.5 6.5
NO Off-Leakage Current
(Note 5)
-0.02 0.001 0.02
I
NO_(OFF)
-1.25 1.25
V
NO_
=
–
+
14V, V
COM_
= ±14V,
V+ = 16.5V, V- = -16.5V
On-Resistance Matching
Between Channels
(Note 4)
PARAMETER SYMBOL MIN TYP MAX UNITS
∆R
ON
15
Ω
4 12
On-Resistance R
DS(ON)
475
Ω
Analog Signal Range
V
COM_
,
V
NO_
V- V+ V
220 350
CONDITIONS
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
(Note 3)
MAX4579
TA= T
MIN
to T
MAX
TA= +25°C
TA= T
MIN
to T
MAX
MAX4578
TA= +25°C
COM On-Leakage
Current (Note 5)
-0.05 0.008 0.05
I
COM_(ON)
-3.25 3.25
nA
-0.05 0.006 0.05
V
COM_
= ±14V,
V
NO_
= ±14V,
V+ = 16.5V,
V- = -16.5V
-6.5 6.5
nA
SWITCH
MAX4578/MAX4579
High-Voltage, Single 8-to-1/
Dual 4-to-1 Cal-Multiplexers
_______________________________________________________________________________________ 3
TA= T
MIN
to T
MAX
Transition Time t
TRANS
600
nsFigure 1
TA= T
MIN
to T
MAX
Enable Turn-Off Time t
OFF
300
nsFigure 3
TA= T
MIN
to T
MAX
Enable Turn-On Time t
ON
500
nsFigure 3
TA= +25°C
TA= +25°CCOM Off-Capacitance C
COM_(OFF)
14 pF
COM On-Capacitance C
COM_(ON)
20 pF
f = 1MHz, VEN= 0,
Figure 6
f = 1MHz, VEN= 2.4V,
Figure 6
TA= +25°CNO Off-Capacitance C
OFF
3 pF
f = 1MHz, VEN= 0,
Figure 6
TA= +25°C
TA= +25°C
Crosstalk Between
Channels (Note 8)
V
CT
-70 dB
Logic Input Capacitance C
IN
3 pF
VEN= 2.4V, f = 1MHz,
V
GEN
= 1Vp-p, Figure 5
f = 1MHz
TA= +25°C
TA= +25°C
Charge Injection
(Note 3)
V
CTE
3.5 0 pC
Off-Isolation V
ISO
-75 dB
CL= 1nF, V
NO_
= 0, RS= 0,
Figure 4
VEN= 0, RL= 50Ω, Figure 5
TA= +25°C
TA= +25°C 260 400
130 220
TA= +25°C
TA= +25°C
TA= +25°C 50 80
GND Supply Current I
GND
120
µA
TA= T
MIN
to T
MAX
VEN= VA_= V
LATCH
= V
CAL
= 0
or V+, V+ = 16.5V, V- = -16.5V
(Note 6)
TA= +25°C -1 0.001 1
Negative Supply Current I-
-5 5
µA
TA= T
MIN
to T
MAX
VEN= VA_= V
LATCH
= V
CAL
= 0
or V+, V+ = 16.5V, V- = -16.5V
(Note 6)
TA= T
MIN
to T
MAX
TA= +25°C
320 450
Break-Before-Make
Interval (Note 3)
t
OPEN
50 180 nsFigure 2
Input Current with Input
Voltage Low
I
IL
-1 0.001 1 µAVEN= VA_= V
LATCH
= V
CAL
= 0
Power-Supply Range ±4.5 ±20 V
50 80
Positive Supply Current I+
120
µA
VEN= VA_= V
LATCH
= V
CAL
= 0
or V+, V+ = 16.5V, V- = -16.5V
(Note 6)
PARAMETER SYMBOL MIN TYP MAX UNITS
Input High Voltage V
IH
2.4 1.9 V
Input Low Voltage V
IL
1.9 0.8 V
Input Current with Input
Voltage High
I
IH
-1 0.001 1 µAVEN= VA_= V
LATCH
= V
CAL
= V+
CONDITIONS
ELECTRICAL CHARACTERISTICS—Dual ±15V Supplies (continued)
(V+ = +15V ±10%, V- = -15V ±10%, logic levels = 2.4V and 0.8V, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are
at T
A
= +25°C.) (Note 2)
LOGIC INPUTS
SUPPLY
DYNAMIC CHARACTERISTICS
MAX4578/MAX4579
High-Voltage, Single 8-to-1/
Dual 4-to-1 Cal-Multiplexers
4 _______________________________________________________________________________________
TA= +25°C
Additional Positive Supply
Current (Note 3)
V+ / V+ /
24k 13k
(V+ / 2) divider active,
V
IH
= V+, V
IL
= 0
TA= T
MIN
to T
MAX
Enable Setup Time t
ES
60
nsFigure 8
TA= +25°C 22 40
TA= T
MIN
to T
MAX
(V+ - V-) Divider Output
2544 / 2560 / 2576 /
4096 4096 4096
Referenced to V- LSB
TA= +25°C
2544 / 2560 / 2576 /
4096 4096 4096
TA= T
MIN
to T
MAX
(V+ / 2) Divider Output
2032 / 2048 / 2064 /
4096 4096 4096
Referenced to GND LSB
TA= +25°C
2032 / 2048 / 2064 /
4096 4096 4096
TA= T
MIN
to T
MAX
Gain Divider Output
4080.9 / 4081 / 4081.1 /
4096 4096 4096
V
REFHI
= 10V,
REFLO = GND
LSB
TA= +25°C
4080.9 / 4081 / 4081.1 /
4096 4096 4096
TA= T
MIN
to T
MAX
Offset Divider Output
14.9 / 15 / 15.1 /
4096 4096 4096
V
REFHI
= 10V,
REFLO = GND
TA= +25°C
Output Resistance
(V+ - V-) Divider
6 9 kΩ(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= T
MIN
to T
MAX
Setup Time t
S
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
6 9 kΩ(Note 3)
TA= +25°C
Output Resistance Offset
Divider
400 800 Ω(Note 3)
250
ns
TA= T
MIN
to T
MAX
Figure 7
TA= +25°C
TA= +25°C 70 200
Hold Time t
H
-10 0
ns
-10
Figure 7
CONDITIONS
mA
TA= T
MIN
to T
MAX
Pulse Width, LATCH
Enable
t
MPW
180
nsFigure 7
TA= +25°C 120 72
ELECTRICAL CHARACTERISTICS—Dual ±15V Supplies (continued)
(V+ = +15V ±10%, V- = -15V ±10%, logic levels = 2.4V and 0.8V, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are
at T
A
= +25°C.) (Note 2)
LATCH TIMING (Note 3)
INTERNAL DIVIDERS
MAX4578/MAX4579
High-Voltage, Single 8-to-1/
Dual 4-to-1 Cal-Multiplexers
_______________________________________________________________________________________ 5
TA= +25°C
Additional Negative
Supply Current (Note 3)
(V+-V-) / (V+ -V-) /
24k 13k
mA
(V+ - V-) divider active,
V
IH
= V+, VIL= 0
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,
V
IH
= V+, VIL= 0
TA= +25°C
Input Resistance
(REFHI, REFLO) (Note 3)
17 32 kΩ
Offset divider active,
gain divider active
REFHI, REFLO Input
Range (Note 3)
V- V+
- 0.3 + 0.3
V
CONDITIONS
ELECTRICAL CHARACTERISTICS—Dual ±5V Supplies
(V+ = +5V ±10%, V- = -5V ±10%, logic levels = 2.4V and 0.8V, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 2)
ELECTRICAL CHARACTERISTICS—Dual ±15V Supplies (continued)
(V+ = +15V ±10%, V- = -15V ±10%, logic levels = 2.4V and 0.8V, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 2)
PARAMETER MIN TYP MAX UNITSCONDITIONS
(Note 3)Analog Signal Range
V
NO_
,
V
COM_
V- V+ V
I
COM_
= 0.2mA, V
NO_
= ±3V,
V+ = 4.5V, V- = -4.5V
TA= T
MIN
to T
MAX
On-Resistance R
DS(ON)
1100
Ω
I
COM_
= 0.2mA, V
NO_
= 3.0V,
V+ = 4.5V, V- = -4.5V
TA= +25°C
On-Resistance Matching
Between Channels
(Note 4)
∆R
DS(ON)
10 Ω
660 900TA= +25°C
I
NO(OFF)
V
NO_
=
–
+
4.5V, V
COM_
= ±4.5V,
V+ = 5.5V, V- = -5.5V
TA= +25°C
NO Off-Leakage Current
(Note 5)
-0.02 0.001 0.02
TA= T
MIN
to T
MAX
-1.25 1.25
MAX4578
TA= +25°C
COM Off-Leakage
Current (Note 5)
I
COM_(OFF)
-0.05 0.005 0.05
nA
V
COM_
= ±4.5V,
1V; V
NO_
=
–
+
4.5V,
V+ = 5.5V,
V- = -5.5V
TA= T
MIN
to T
MAX
-6.5 6.5
MAX4579
TA= +25°C -0.5 0.005 0.5
TA= T
MIN
to T
MAX
-6.5 6.5
MAX4578
TA= +25°C
COM On-Leakage
Current (Note 5)
I
COM_(ON)
-0.05 0.008 0.05
nA
V
COM_
= ±4.5V,
V
NO_
= ±4.5V or
floating, V+ = 5.5V,
V- = -5.5V
TA= T
MIN
to T
MAX
-6.5 6.5
MAX4579
TA= +25°C -0.05 0.05
TA= T
MIN
to T
MAX
-3.25 3.25
SYMBOL
SWITCH
nA
MAX4578/MAX4579
High-Voltage, Single 8-to-1/
Dual 4-to-1 Cal-Multiplexers
6 _______________________________________________________________________________________
TA= T
MIN
to T
MAX
Enable Turn-Off Time t
OFF
1.3
µsV
NO1
= 3V, Figure 3
TA= T
MIN
to T
MAX
Enable Turn-On Time t
ON
1.5
µsV
NO1
= 3V, Figure 3
TA= T
MIN
to T
MAX
Transition Time t
TRANS
PARAMETER SYMBOL MIN TYP MAX UNITS
Input High Voltage V
IH
2.4 1.4 V
Input Low Voltage V
IL
1.4 0.5 V
TA= +25°C
TA= +25°C
µs
0.675 1.2
V
NO1
= 3V, V
NO8
= 0,
Figure 1
0.5 1.0
TA= +25°C
TA= +25°C
2.2
Input Current with
Input Voltage High
I
IH
-1.0 0.001 1.0 µA
Break-Before-Make
Interval
t
OPEN
200 440 nsFigure 2
VEN= VA_= V
LATCH
= V
CAL
= V+
Input Current with
Input Voltage Low
I
IL
-1.0 0.001 1.0 µA
CONDITIONS
VEN= VA_= V
LATCH
= V
CAL
= 0
ELECTRICAL CHARACTERISTICS—Dual ±5V Supplies (continued)
(V+ = +5V ±10%, V- = -5V ±10%, logic levels = 2.4V and 0.5V, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 2)
ELECTRICAL CHARACTERISTICS—Single +12V Supply
(V+ = +12V, V- = 0, logic levels = 2.4V and 0.8V, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.) (Note 2)
LOGIC INPUTS (Note 3)
DYNAMIC CHARACTERISTICS (Note 3)
TA= +25°C
(Note 3)
TA= T
MIN
to T
MAX
TA= T
MIN
to T
MAX
TA= +25°C
TA= +25°C
CONDITIONS
Ω
470 750
R
DS(ON)
On-Resistance
V0 V+
V
NO_
,
V
COM_
Analog Signal Range
-1.25 1.25
850
Ω
8∆R
(ON)
On-Resistance Matching
Between Channels
(Note 4)
nA
-0.02 0.001 0.02
I
NO(OFF)
NO Off-Leakage Current
(Notes 5, 9)
UNITSMIN TYP MAXSYMBOLPARAMETER
I
COM_
= 0.2mA, V
NO_
= 3V, 10V
I
COM_
= 0.2mA, V
NO_
= 3V, 10V
V
COM_
= 1V, 11V;
V
NO_
= 11V, 1V
SWITCH
1.0 1.8
Loading...