ADG715 Datasheet

IC型号：
ADG715
PDF描述：
CMOS, Low Voltage Serially Controlled, Octal SPST Switches
文件大小：
497.90KB
PDF页数：
17页
芯片厂家：
AD

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ADG714/ADG715

APPLICATIONS

Multiple Devices On One Bus

Power Supply Sequencing

Figure 21 shows four ADG715 devices on the same serial bus.

Each has a different slave address since the state of their A0 and

A1 pins is different. This allows each switch to be written to or

read from independently.

Daisy-Chaining Multiple ADG714s

A number of ADG714 switches may be daisy-chained simply by

using the DOUT pin. Figure 22 shows a typical implementa-

tion. The

SYNC

pin of all three parts in the example are tied

together. When

SYNC

is brought low, the input shift registers

of all parts are enabled, data is written to the parts via DIN, and

clocked through the shift registers. When the transfer is complete,

SYNC

is brought high and all switches are updated simulta-

neously. Further shift registers may be added in series.

MASTER

When using CMOS devices, care must be taken to ensure correct

power-supply sequencing. Incorrect power-supply sequencing

can result in the device being subjected to stresses beyond those

maximum ratings listed in the data sheet. Digital and analog inputs

should always be applied after power supplies and ground. In dual

supply applications, if digital or analog inputs may be applied to

the device prior to the V

and V

supplies, the addition of a

Schottky diode connected between V

and GND will ensure

that the device powers on correctly. For single supply operation,

should be tied to GND as close to the device as possible.

Decoding Multiple ADG714s Using an ADG739

The dual 4-channel ADG739 multiplexer can be used to multiplex

a single chip select line in order to provide chip selects for up to

SDA

SCL

SDA

SCL

SDA

SCL

SDA

SCL

SDA

SCL

ADG715

Figure 21. Multiple ADG715s On One Bus

SCLK

DIN

SCLK

ADG714

DIN

DOUT

ADG714

DIN

DOUT

ADG714

DIN

DOUT

OTHER

SERIAL

DEVICES

SYNC

Figure 22. Multiple ADG714 Devices in a Daisy-Chained Con铿乬uration

鈥?4鈥?/div>

REV. 0

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