MAX301 Datasheet, PDF (5/8 Pages) Maxim Integrated Products – Precision, Dual, High-Speed Analog Switches

Precision, Dual, High-Speed Analog Switches
____________________Pin Descriptions
MAX301 PIN
DIP/SO
LCC
1, 8
2, 10
2-7
9, 16
10, 15
1, 3-9, 11,
16
5, 7, 12,
20
13, 19
11
14
12
15
13
17
14
18
MAX303 PIN
DIP/SO
LCC
1, 8, 3, 6
2-7
2, 4, 8, 10
1, 3, 6, 9,
11, 16
11
14
12
15
13
17
14
18
15, 10
16, 9, 5, 4
19, 13
5, 7, 12,
20
MAX305 PIN
DIP/SO
LCC
1, 8, 3, 6
2-7
2, 4, 8, 10
1, 3, 6, 9,
11, 16
11
14
12
13
14
15, 10
16, 9, 5, 4
15
17
18
19, 13
5, 7, 12,
20
NAME
COM1,
COM2
N.C.
NC1,
NC2
IN2, IN1
V+
VL
GND
V-
NAME
COM_
N.C.
V+
VL
GND
V-
IN1, IN2
NC_,
NO_
NAME
COM_
N.C.
V+
VL
GND
V-
IN1, IN2
NO_
FUNCTION
Drain (Analog Signal)
Not internally connected
Source (Analog Signal)
Digital Logic Inputs
Positive Supply-Voltage
Input—connected to
substrate
Logic Supply-Voltage Input
Ground
Negative Supply Voltage
Input
FUNCTION
Drain (Analog Signal)
Not internally connected
Positive Supply-Voltage
Input—connected to
substrate
Logic Supply-Voltage Input
Ground
Negative Supply Voltage
Input
Digital Logic Inputs
Source (Analog Signal)
FUNCTION
Drain (Analog Signal)
Not internally connected
Positive Supply-Voltage
Input—connected to
substrate
Logic Supply-Voltage Input
Ground
Negative Supply Voltage
Digital Logic Inputs
Source (Analog Signal)
__________Applications Information
Operation with Supply Voltages
Other than ±15V
The MAX301/MAX303/MAX305 switches operate with
±4.5V to ±20V bipolar supplies and a +10V to +30V 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. The usual
on-resistance temperature coefficent is 0.5%/°C (typ).
Logic Inputs
The MAX301/MAX303/MAX305 operate with a single pos-
itive supply or with bipolar supplies. The devices maintain
TTL compatibility with supplies anywhere in the ±4.5V to
±20V range as long as V_L = +5V. If V_L is connected to V+
or another supply at voltages other than +5V, the devices
will operate at CMOS-logic level inputs.
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 VL, V-, and
logic inputs. If power-supply sequencing is not possible,
add two small signal diodes in series with the supply pins
for overvoltage protection (Figure 1). Adding diodes
reduces the analog signal range to 1V below V+ and 1V
below V-, but low switch resistance and low leakage char-
acteristics are unaffected. Device operation is
unchanged, and the difference between V+ to V- should
not exceed +44V.
V+
NO_
Vg
COM_
V-
Figure 1. Overvoltage Protection Using Blocking Diodes
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