Datasheet > UMX9989AP

UMX9989AP

更新时间： 2024-09-15 03:23:27

品牌	Logo	应用领域
美高森美 - MICROSEMI		二极管快恢复二极管
页数	文件大小	规格书
5页	316K
描述
DUAL ULTRA LOW MAGNETIC MOMENT FAST DIODES FOR MRI APPLICATIONS

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中文翻译

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技术参数
数据手册

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UMX9989AP 技术参数

是否Rohs认证：	符合	生命周期：	Active
Reach Compliance Code：	compliant	ECCN代码：	EAR99
风险等级：	5.55	二极管类型：	RECTIFIER DIODE
最大正向电压 (VF)：	0.4 V	最大非重复峰值正向电流：	2 A
最高工作温度：	150 °C	子类别：	Other Diodes
表面贴装：	YES	Base Number Matches：	1

UMX9989AP 数据手册

UMX9989AP™

DUAL ULTRA LOW MAGNETIC MOMENT

FAST DIODES FOR MRI APPLICATIONS

RoHS compliant

KEY FEATURES

DESCRIPTION

Ultra low magnetic construction

The UMX9989AP is the first MRI

2) Passive switching of surface coil

switching diode module, designed to

optimize performance and reduce

assembly labor, cost, and polarity

errors.

detuning and blocking circuits. In this case,

the flow of loop current during transmitter

pulse turns on the diodes, without a switch

driver.

RoHS compliant

Matched pairs available

Surface mount package.

Metallurgical bond

There are two principle applications for

which the UMX9989AP modules are

intended:

If the UMX9989AP is combined with a PIN

diode (UM7201SM) the combination can

be used to implement a semi-active detune

or block circuit design. The UMX9989AP’s

turn on the PIN diode (used for higher

1) MRI receiver protection from high

RF energy fields, including long RF

pulses and RF spike pulses present in

Planar passivated chip

Non cavity design

most MRI machines. The UMX9989AP power switching) during the sinc(x)

acts as a passive protector (limiter) for sidelobes, before the main pulse of the

Thermally matched configuration

Low capacitance at 0 V bias

Low conductance at 0 V bias

the MRI receiver’s LNA.

transmitter waveform, sinc(x) = [sin (x)]/x,

The diode assembly exhibits extremely occurs. The mechanical drawing shows the

low insertion loss, both in the “on” state structure of the diode pair. Manufacture of

(high power present) and the “off” state dual anti-parallel pairs of UMX9989’s

(receiver power present) so the

Receiver’s Noise Figure is not

increased by the protector circuit.

ensures that the matched pair of diodes can

be inserted in a coil with the correct diode

polarities and with the minimum parasitic

inductance and capacitance, thermal

impedance and labor for the coil

manufacturer.

Compatible with automatic

insertion equipment

APPLICATIONS/BENEFITS

MR passive receiver protection

MR passive blocking circuits

MR passive detuning circuits

MR passive disable circuits

IMPORTANT: For themost current data, consultMICROSEMI’s website: http://www.microsemi.com

ABSOLUTE MAXIMUM RATINGS AT 25º C

(UNLESS OTHERWISE SPECIFIED)

Rating

Symbol

Value

Unit

Non-Repetitive Peak Forward Surge Current

8.3ms Single half sine wave

I_FSM

Storage Temperature

Operating Temperature

T stg

T op

-65 to +150

ºC

Microsemi

Page 1

Rev. 0, 2005-09-08

12 3 4 5

中文翻译

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与UMX9989AP相关器件

型号	品牌	获取价格	描述	数据表
UMX9989AP_09	MICROSEMI	获取价格	DUAL ULTRA LOW MAGNETIC MOMENT FAST DIODES FOR MRI APPLICATIONS
UMY1N	UTC	获取价格	DUAL TRANSISTOR
UMY1N	ROHM	获取价格	Emitter common (dual transistors)
UMY1N	CJ	获取价格	SOT-353
UMY1N	BL Galaxy Electrical	获取价格	50V,0.15A,General Purpose PNP Bipolar Transistor 50V,0.15A,General Purpose NPN Bipolar Tra
UMY1N_15	UTC	获取价格	DUAL TRANSISTOR
UMY1NG-AL5-R	UTC	获取价格	Small Signal Bipolar Transistor
UMY1NL-AL5-R	UTC	获取价格	DUAL TRANSISTOR
UMY1NTL	ROHM	获取价格	Small Signal Bipolar Transistor, 0.1A I(C), 40V V(BR)CEO, 2-Element, NPN and PNP, Silicon,
UMY1N-TP	MCC	获取价格	Small Signal Bipolar Transistor,

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