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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 (100
max) is matched between switch-
es to 6
max. Each switch can handle Rail-to-Rail
analog signals. The off leakage current is 0.1nA at
T
A
= +25°C and 2nA at T
A
= +85°C.
The MAX4539/MAX4540 are available in small 20-pin
DIP, SO, and SSOP packages.
Applications
Avionics
Battery-Operated Equipment
Data-Acquisition Systems
Audio-Signal Routing
Test Equipment
Networking
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
R
ON
: 100
max
o
R
ON
Matching Between Channels: 6
max
o
Charge Injection: 5pC max
o
Low 0.1nA Off Leakage Current
o
Small 20-Pin SSOP/SO/DIP Packages
M
Low-Voltage, Single 8-to-1 and
Dual 4-to-1 Cal-Multiplexers
________________________________________________________________ Maxim Integrated Products
1
MAX4539
R2
3R
5R
R2
GND
V+
V-
REFHI
15R1
4081R1
4081R1
15R1
REFLO
COM
NO1
NO2
NO3
NO4
NO8
NO7
NO6
NO5
5
6
7
8
9
10
4
3
2
1
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
MAX4539
CAP
MAX4539CWP
MAX4539CPP
MAX4539EAP
MAX4539EWP
MAX4539EPP
MAX4540
CAP
MAX4540CWP
MAX4540CPP
MAX4540EAP
MAX4540EWP
MAX4540EPP
0°C to +70°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
TEMP. RANGE
PIN-PACKAGE
20 SSOP
20 Wide SO
20 Plastic DIP
20 SSOP
20 Wide SO
20 Plastic DIP
20 SSOP
20 Wide SO
20 Plastic DIP
20 SSOP
20 Wide SO
20 Plastic DIP
Pin Configurations/
_______________Functional Diagrams
Ordering Information
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
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.