MAX4665CSE データシートの表示（PDF） - Maxim Integrated

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MAX4665CSE

5Ω, Quad, SPST, CMOS Analog Switches

Maxim Integrated 

5Ω, Quad, SPST,

CMOS Analog Switches

Pin Description

MAX4664

PIN

MAX4665

MAX4666

1, 16, 9, 8 1, 16, 9, 8 1, 16, 9, 8

2, 15,

10, 7

2, 15,

10, 7

2, 15,

10, 7

3,14, 11, 6

–

–

–

3,14, 11, 6

–

–

–

3, 6

–

–

14, 11

4

4

4

5

5

5

12

12

12

13

13

13

NAME

IN1, IN2,

IN3, IN4

COM1, COM2,

COM3, COM4

NC1, NC2,

NC3, NC4

NO1, NO2,

NO3, NO4

NO1, NO4

NC2, NC3

V-

GND

VL

V+

FUNCTION

Logic-Control Digital Inputs

Analog Switch, Common Terminals

Analog Switch, Normally Closed Terminals

Analog Switch, Normally Open Terminals

Analog Switch, Normally Open Terminal

Analog Switch, Normally Closed Terminal

Negative Analog Supply-Voltage Input. Connect to GND for single-

supply operation.

Ground

Logic-Supply Input

Positive Analog Supply Input

Applications Information

Overvoltage Protection

Proper power-supply sequencing is recommended for

all CMOS devices. Do not exceed the absolute maxi-

mum ratings, because stresses beyond the listed rat-

ings can cause permanent damage to the devices.

Always sequence V+ on first, then V-, followed by the

logic inputs, NO, or COM. If power-supply sequencing

is not possible, add two small signal diodes (D1, D2) in

series with supply pins (Figure 1). Adding diodes

reduces the analog signal range to one diode drop

below V+ and one diode drop above V-, but does not

affect the devices’ low switch resistance and low leak-

age characteristics. Device operation is unchanged,

and the difference between V+ and V- should not

exceed 44V. These protection diodes are not recom-

mended when using a single supply.

Off-Isolation at High Frequencies

In 50Ω systems, the high-frequency on-response of

these parts extends from DC to above 100MHz, with a

typical loss of -2dB. When the switch is turned off, how-

ever, it behaves like a capacitor, and off-isolation

decreases with increasing frequency. (Above 300MHz,

COM_

+15V

D1

V+

*

*

*

*

MAX4664

MAX4665

MAX4666

NO_

V-

D2

-15V * INTERNAL PROTECTION DIODES

Figure 1. Overvoltage Protection Using External Blocking

Diodes

the switch actually passes more signal turned off than

turned on.) This effect is more pronounced with higher

source and load impedances.

8 _______________________________________________________________________________________

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