Datasheet > MAX4938CTN

MAX4938CTN

更新时间： 2024-09-16 11:16:43

品牌	Logo	应用领域
美信 - MAXIM		开关高压
页数	文件大小	规格书
19页	1636K
描述
Octal High-Voltage Transmit/Receive Switches

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MAX4938CTN 数据手册

19-5541; Rev 1; 3/11

Octal High-Voltage Transmit/Receive Switches

General Description

Features

S Low Power: Low Impedance (5ω) with 1.5mA Bias

The MAX4936–MAX4939 are octal, high-voltage, transmit/

receive (T/R) switches. The T/R switches are based on

a diode bridge topology, and the amount of current

in the diode bridges can be programmed through an

SPIK interface. All devices feature a latch-clear input

to asynchronously turn off all T/R switches and put the

device into a low-power shutdown mode. The MAX4936/

MAX4938 include the T/R switch and grass-clipping

diodes, performing both transmit and receive operations.

The MAX4937/MAX4939 include just the T/R switch and

perform the receive operation only.

Current Only

S Low Noise < 0.5nV/√Hz (typ) with 1.5mA Bias

Current Only

S Wide -3dB Bandwidth 65MHz (typ)

S Easy Programming with SPI Interface

S High Density (8 Channels per Package)

S Grass-Clipping Diodes with Low-Voltage Isolation

(MAX4936/MAX4938)

S Output Clamp Diodes for Receiver Protection

The MAX4936/MAX4938 transmit path is low impedance

during high-voltage transmit and high impedance during

low-voltage receive, providing isolation between transmit

and receive circuitry. The high-voltage transmit path is

high bandwidth, low distortion, and low jitter.

(MAX4936/MAX4937)

S Global Shutdown Control (CLR)

S Each T/R Switch Can Be Individually Programmed

On or Off

The receive path for all devices is low impedance dur-

ing low-voltage receive and high impedance during

high-voltage transmit, providing protection to the receive

circuitry. The low-voltage receive path is high bandwidth,

low noise, low distortion, and low jitter. Each T/R switch

can be individually programmed on or off, allowing these

devices to also be used as receive path multiplexers.

S Low-Voltage Receive Path with High-Voltage

Protection

S Space-Saving, 5mm x 11mm, 56-Pin TQFN Package

Applications

Medical/Industrial Imaging

Ultrasound

The MAX4936/MAX4937 feature clamping diodes to

protect the receiver input from voltage spikes due to

leakage currents flowing through the T/R switches dur-

ing transmission. The MAX4938/MAX4939 do not have

clamping diodes and rely on clamping diodes integrated

in the receiver front end.

High-Voltage Transmit and Low-Voltage Isolation

All devices are available in a small, 56-pin, 5mm x 11mm

TQFN package, and are specified over the commercial

0NC to +70NC temperature range.

Ordering Information/Selector Guide

LOW-VOLTAGE

ISOLATION

HIGH-VOLTAGE

PROTECTION

PART

OUTPUT CLAMP

TEMP RANGE

PIN-PACKAGE

MAX4936CTN+

MAX4937CTN+

MAX4938CTN+**

MAX4939CTN+**

Yes

0NC to +70NC

56 TQFN-EP*

Yes

+Denotes a lead(Pb)-free/RoHS-compliant package.

*EP = Exposed pad.

**Future product—contact factory for availability.

SPI is a trademark of Motorola, Inc.

_______________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

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与MAX4938CTN相关器件

型号	品牌	获取价格	描述	数据表
MAX4939CTN	MAXIM	获取价格	Octal High-Voltage Transmit/Receive Switches
MAX494	MAXIM	获取价格	Single/Dual/Quad, Micropower, Single-Supply Rail-to-Rail Op Amps
MAX494	ADI	获取价格	单/双/四路、微功耗、单电源、满摆幅运算放大器
MAX4940	MAXIM	获取价格	Dual/Quad, Unipolar/Bipolar, High-Voltage Digital Pulsers
MAX4940	ADI	获取价格	双/四通道、单/双极性、高压数字脉冲发生器
MAX4940A	MAXIM	获取价格	Dual/Quad, Unipolar/Bipolar, High-Voltage Digital Pulsers
MAX4940ACTN+	MAXIM	获取价格	Analog Circuit, 1 Func, BICMOS, 8 X 8 MM, ROHS COMPLIANT, MO-220, TQFN-56
MAX4940ACTN+T	MAXIM	获取价格	Analog Circuit, 1 Func, BICMOS, 8 X 8 MM, ROHS COMPLIANT, TQFN-56
MAX4940CTN+	MAXIM	获取价格	Dual/Quad, Unipolar/Bipolar, High-Voltage Digital Pulsers
MAX4940CTN+T	MAXIM	获取价格	Analog Circuit, 1 Func, BICMOS, 8 X 8 MM, ROHS COMPLIANT, TQFN-56

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