MAX4621/MAX4622/MAX4623
Dual, 5
Ω
Analog Switches
_______________________________________________________________________________________ 7
Pin Description
Applications Information
Operation with Supply Voltages
Other than ±15V
The MAX4621/MAX4622/MAX4623 switches operate with
±4.5V to ±18V bipolar supplies and a +4.5V to +36V sin-
gle supply. In either case, analog signals ranging from
V+ to V- can be switched. The
Typical Operating
Characteristics
graphs show the typical on-resistance
variation with analog signal and supply voltage.
Overvoltage Protection
Proper power-supply sequencing is recommended for all
CMOS devices. It is important not to exceed the absolute
maximum ratings because stresses beyond the listed rat-
ings may cause permanent damage to the devices.
Always sequence V+ on first, followed by V
L
, V-, and
logic inputs. If power-supply sequencing is not possible,
add two small signal diodes in series with the supply pins
and a Schottky diode between V+ and V
L
(Figure 1).
Adding diodes reduces the analog signal range to 1V
below V+ and 1V above V-, but low switch resistance and
low leakage characteristics are unaffected. The differ-
ence between V+ and V- should not exceed +44V.
Negative Supply Voltage14
Ground13
Logic Supply-Voltage Input12
Positive Supply-Voltage Input11
Not internally connected2, 7
Switch Common Terminal1, 3, 6, 8
Negative Supply Voltage
Input
14
Ground13
Positive Supply-Voltage Input11
Not internally connected2, 7
Switch Common Terminal1, 3, 6, 8
Ground
14
Negative Supply Voltage
Input
13
Logic Supply-Voltage Input12
Positive Supply-Voltage Input11
Digital Logic Inputs10, 15
Switch Normally Open
Terminal
9, 16
Not internally connected2–7
Switch Common Terminal1, 8
FUNCTIONPIN
Figure 1. Overvoltage Protection Using Blocking Diodes
*INTERNAL PROTECTION DIODES
V-
GND
V
L
V+
N.C.
COM_
V-
GND
V+
N.C.
COM_
V-
GND
V
L
V+
IN2, IN1
NO2, NO1
N.C.
COM1,
COM2
NAME
NC_, NO_
Switch Normally Closed/Open
Terminal
4, 5, 9, 16
NO_
Switch Normally Open
Terminal
4, 5, 9, 16
V
L
Logic Supply-Voltage Input12
IN2, IN1 Digital Logic Inputs10, 15
IN2, IN1 Digital Logic Inputs10, 15
MAX4621
MAX4622
MAX4623
