MAX307EWI(2010) Просмотр технического описания (PDF) - Maxim Integrated

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MAX307EWI
(Rev.:2010)

Precision, 16-Channel/Dual 8-Channel, High-Performance, CMOS Analog Multiplexers

Maxim Integrated 

Precision, 16-Channel/Dual 8-Channel,

High-Performance, CMOS Analog Multiplexers

_____________________________________________________________Pin Descriptions

MAX306

PIN

1

NAME

V+

2, 3, 13

N.C.

4–11

12

14–17

18

19–26

27

28

NO16–NO9

GND

A3–A0

EN

NO1–NO8

V-

COM

FUNCTION

Positive Supply Voltage Input

No Connection. Not internally

connected.

Analog Inputs–bidirectional

Ground

Address Inputs

Enable Inputs

Analog Inputs–bidirectional

Negative Supply Voltage Input

Output–bidirectional

MAX307

PIN

1

2

NAME

V+

COMB

3, 13, 14

N.C.

4–11 NO8B–NO1B

12

GND

15, 16, 17 A2, A1, A0

18

EN

19–26 NO1A–NO8A

27

V-

28

COMA

FUNCTION

Positive Supply Voltage Input

Output B–bidirectional

No Connection. Not internally

connected.

Analog Inputs–bidirectional

Ground

Address Inputs

Enable Input

Analog Inputs–bidirectional

Negative Supply Voltage Input

Output A–bidirectional

__________Applications Information

Operation with Supply Voltages

Other than ±15V

Using supply voltages other than ±15V will reduce the

analog signal range. The MAX306/MAX307 switches

operate with ±4.5V to ±20V bipolar supplies or with a

+5V to +30V single supply; connect V- to GND when

operating with a single supply. Also, both device types

can operate with unbalanced supplies such as +24V

and -5V. The Typical Operating Characteristics graphs

show typical on-resistance with 20V, 15V, 10V, and 5V

supplies. (Switching times increase by a factor of two

or more for operation at 5V.)

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 may cause permanent damage to the devices.

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

the logic inputs, NO or COM. If power-supply sequenc-

ing is not possible, add two small-signal diodes in

series with supply pins for overvoltage protection

(Figure 1). Adding diodes reduces the analog signal

range to 1V above V+ and 1V below V-, but low switch

resistance and low leakage characteristics are unaf-

fected. Device operation is unchanged, and the differ-

ence between V+ and V- should not exceed +44V.

V+

NO

Vg

COM

V-

Figure 1. Overvoltage Protection Using External Blocking

Diodes

6 _______________________________________________________________________________________

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