MAX14802ECM 查看數據表（PDF） - Maxim Integrated

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MAX14802ECM

Low-Charge Injection, 16-Channel, High-Voltage Analog Switches

Maxim Integrated 

MAX14802/MAX14803/MAX14803A

Low-Charge Injection, 16-Channel,

High-Voltage Analog Switches

Applications Information

For medical ultrasound applications, see Figures 4, 5,

and 6.

Logic Levels

The MAX14802/MAX14803/MAX14803A digital inter-

face inputs CLK, DIN, LE, and CLR operate on the VDD

supply voltage.

Daisy-Chaining Multiple Devices

Digital output DOUT is provided to allow the connection

of multiple MAX14802/MAX14803/MAX14803A devices

by daisy-chaining (Figure 3). Connect each DOUT to the

DIN of the subsequent device in the chain. Connect CLK,

LE, and CLR inputs of all devices, and drive LE logic-low

to update all devices simultaneously. Drive CLR high to

open all the switches simultaneously. Additional shift reg-

isters can be included anywhere in series with the

MAX14802/MAX14803/MAX14803A data chain.

Supply Sequencing and Bypassing

The MAX14802/MAX14803/MAX14803A do not require

special sequencing of the VDD, VPP, and VNN supply

voltages; however, analog switch inputs must be

unconnected, or satisfy VNN ≤ (VCOM_, VNO_) ≤ VPP

during power-up and power-down. Bypass VDD, VPP,

and VNN to GND with a 0.1μF ceramic capacitor as

close as possible to the device.

Application Diagrams

U10

U11

U1n

DIN1

DIN

DOUT

DIN

DOUT

DIN

DOUT

MAX14802

MAX14803

MAX14803A

MAX14802

MAX14803

MAX14803A

MAX14802

MAX14803

MAX14803A

CLK

CLK

CLK

CLK

LE

LE

CLR

LE

CLR

LE

CLR

CLR

U20

U21

U2n

DIN2

DIN

DOUT

DIN

DOUT

DIN

DOUT

MAX14802

MAX14802

MAX14802

MAX14803

MAX14803

MAX14803

MAX14803A

MAX14803A

MAX14803A

CLK

CLK

CLK

LE

CLR

LE

CLR

LE

CLR

Figure 3. Interfacing Multiple Devices by Daisy-Chaining

Maxim Integrated

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