MAX4910/MAX4911/MAX4912
Quad-SPDT, Clickless Audio Switches
with Negative Signal Handling
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Detailed Description
The MAX4910/MAX4911/MAX4912 quad SPDT audio
switches are low on-resistance, low supply current,
high power-supply rejection ratio (PSRR) devices that
operate from a +1.8V to +5.5V single supply. These
devices feature a negative signal capability that allows
signals below GND to pass through without distortion
and break-before-make switching.
The MAX4910/MAX4912 have two digital control inputs
CB1 and CB2 where each bit controls a pair of switch-
es (see Table 1). The MAX4911 has an active-low
enable EN and a digital control bit CB. Driving EN low
takes the switches out of high impedance and CB con-
trols all four switches (see Table 2). The MAX4910/
MAX4911 have shunt resistors on all their NO and NC
terminals to suppress click-and-pop sounds that may
occur from switching to a precharged terminal. The
MAX4912 does not have click-and-pop suppression
resistors on NC2 and NC4 for applications that do not
require predischarge switching.
Pin Description
NAME FUNCTION
11NC1 Analog Switch 1—Normally Closed Terminal
2—CB1 Digital Control Input for Analog Switch 1 and Analog Switch 3
—2CB Digital Control Input for All Analog Switches
33NO2 Analog Switch 2—Normally Open Terminal
44COM2 Analog Switch 2—Common Terminal
55NC2 Analog Switch 2—Normally Closed Terminal
66GND Ground
77NO3 Analog Switch 3—Normally Open Terminal
88COM3 Analog Switch 3—Common Terminal
99NC3 Analog Switch 3—Normally Closed Terminal
10 — CB2 Digital Control Input for Analog Switch 2 and Analog Switch 4.
—10EN
Enable Input. Driving EN high causes all switches to be high impedance. Pull EN low for
normal operation.
11 11 NO4 Analog Switch 4—Normally Open Terminal
12 12 COM4 Analog Switch 4—Common Terminal
13 13 NC4 Analog Switch 4—Normally Closed Terminal
14 14 V
CC
Positive Supply Voltage Input
15 15 NO1 Analog Switch 1—Normally Open Terminal
16 16 COM1 Analog Switch 1—Common Terminal
——EP Exposed Pad. Connect to Ground
(20 pages)
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