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MAX4578-MAX4579

Description
High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers
File Size176KB,20 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
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MAX4578-MAX4579 Overview

High-Voltage, Single 8-to-1/ Dual 4-to-1 Cal-Multiplexers

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.

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