MAX4052

Manufacturer Part NumberMAX4052
DescriptionThe MAX4051/MAX4052/MAX4053 and MAX4051A/MAX4052A/MAX4053A are low-voltage, CMOS analog ICs configured as an 8-channel multiplexer (MAX4051/A), two 4-channel multiplexers (MAX4052/A), and three single-pole/double-throw (SPDT) switches (MAX4053/A)
ManufacturerMaxim
MAX4052 datasheet
 
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Table 1. Truth Table/Switch Programming
ADDRESS BITS
INH
ADDC*
ADDB
1
X
X
0
0
0
0
0
0
0
0
1
0
0
1
0
1
0
0
1
0
0
1
1
0
1
1
X = Don’t care
* ADDC not present on MAX4052.
Note: NO and COM pins are identical and interchangeable. Either may be considered an input or output; signals pass equally well
in either direction.
__________Applications Information
Power-Supply Considerations
The MAX4051/MAX4052/MAX4053 and MAX4051A/
MAX4052A/MAX4053A construction is typical of most
CMOS analog switches. They have three supply pins:
V+, V-, and GND. V+ and V- are used to drive the inter-
nal CMOS switches and set the limits of the analog volt-
age on any switch. Reverse ESD-protection diodes are
internally connected between each analog signal pin
and both V+ and V-. If any analog signal exceeds V+ or
V-, one of these diodes will conduct. During normal
operation, these (and other) reverse-biased ESD diodes
leak, forming the only current drawn from V+ or V-.
______________________________________________________________________________________
Low-Voltage, CMOS Analog
Multiplexers/Switches
MAX4051/
ADDA
MAX4051A
X
All switches open
0
COM–NO0
1
COM–NO1
0
COM–NO2
1
COM–NO3
0
COM–NO4
1
COM–NO5
0
COM–NO6
1
COM–NO7
Virtually all the analog leakage current comes from 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
Overview
either V+ or V- and the analog signal. This means their
leakages will vary as the signal varies. The difference in
the two diode leakages to the V+ and V- pins consti-
tutes the analog signal path leakage current. All analog
leakage current flows between each pin and one of the
supply terminals, not to the other switch terminal. This is
why both sides of a given switch can show leakage cur-
rents of either the same or opposite polarity.
There is no connection between the analog signal
paths and GND.
ON SWITCHES
MAX4052/
MAX4053/
MAX4052A
MAX4053A
All switches open
All switches open
COMA–NCA,
COMB–NO0B,
COMB–NCB,
COMA–NO0A
COMC–NCC
COMA–NOA,
COMB–NO1B,
COMB–NCB,
COMA–NO1A
COMC–NCC
COMA–NCA,
COMB–NO2B,
COMB–NOB,
COMA–NO2A
COMC–NCC
COMA–NOA,
COMB–NO3B,
COMB–NOB,
COMA–NO3A
COMC–NCC
COMA–NCA,
COMB–NO0B,
COMB–NCB,
COMA–NO0A
COMC–NOC
COMA–NOA,
COMB–NO1B,
COMB–NCB,
COMA–NO1A
COMC–NOC
COMA–NCA,
COMB–NO2B,
COMB–NOB,
COMA–NO2A
COMC–NOC
COMA–NOA,
COMB–NO3B,
COMB–NOB,
COMA–NO3A
COMC–NOC
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