Datasheet > ISO721QDRQ1

ISO721QDRQ1

更新时间： 2024-02-14 08:07:18

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
19页	379K
描述
3.3-V / 5-V HIGH-SPEED DIGITAL ISOLATORS

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ISO721QDRQ1 数据手册

ISO721-Q1

www.ti.com ....................................................................................................................................................................................................... SLLS918–JULY 2008

3.3-V / 5-V HIGH-SPEED DIGITAL ISOLATORS

FEATURES

•

Qualified for Automotive Applications

•

Low-Power Sleep Mode

High Electromagnetic Immunity

Low Input Current Requirement

Failsafe Output

•

4000-V_(peak)Isolation

–

UL 1577, IEC 60747-5-2 (VDE 0884, Rev 2),

IEC 61010-1

50-kV/s Transient Immunity (Typ)

Drop-In Replacement for Most Optical and

Magnetic Isolators

•

Signaling Rate 0 Mbps to 150 Mbps

–

Low Propagation Delay

Low Pulse Skew

(Pulse-Width Distortion)

DESCRIPTION

The ISO721 is a digital isolator with a logic input and output buffer separated by a silicon oxide (SiO₂) insulation

barrier. This barrier provides galvanic isolation of up to 4000 V. Used in conjunction with isolated power supplies,

this device prevents noise currents on a data bus or other circuits from entering the local ground, and interfering

with or damaging sensitive circuitry.

A binary input signal is conditioned, translated to a balanced signal, then differentiated by the capacitive isolation

barrier. Across the isolation barrier, a differential comparator receives the logic transition information, then sets or

resets a flip-flop and the output circuit accordingly. A periodic update pulse is sent across the barrier to ensure

the proper dc level of the output. If this dc refresh pulse is not received for more than 4 µs, the input is assumed

to be unpowered or not being actively driven, and the failsafe circuit drives the output to a logic high state.

FUNCTION DIAGRAM

Isolation Barrier

DC Channel

Filter

Pulse Width

Demodulation

OSC

PWM

ref

Carrier Detect

POR

BIAS

Data MUX

AC Detect

3-State

Input

Filter

ref

OUT

Output Buffer

AC Channel

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...19

中文翻译

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ISO721QDRQ1 替代型号

型号	品牌	替代类型	描述	数据表
ISO721MD	TI	类似代替	3.3-V / 5-V HIGH-SPEED DIGITAL ISOLATORS
ISO721DR	TI	类似代替	3.3-V / 5-V HIGH-SPEED DIGITAL ISOLATORS
ISO721D	TI	类似代替	3.3-V / 5-V HIGH-SPEED DIGITAL ISOLATORS

与ISO721QDRQ1相关器件

型号	品牌	获取价格	描述	数据表
ISO722	TI	获取价格	3.3-V / 5-V HIGH-SPEED DIGITAL ISOLATORS
ISO7220A	TI	获取价格	DUAL DIGITAL ISOLATORS
ISO7220A_08	TI	获取价格	DUAL DIGITAL ISOLATORS
ISO7220A_10	TI	获取价格	DUAL DIGITAL ISOLATORS
ISO7220AD	TI	获取价格	DUAL DIGITAL ISOLATORS
ISO7220ADG4	TI	获取价格	DUAL DIGITAL ISOLATORS
ISO7220ADR	TI	获取价格	DUAL DIGITAL ISOLATORS
ISO7220ADRG4	TI	获取价格	DUAL DIGITAL ISOLATORS
ISO7220A-Q1	TI	获取价格	DUAL DIGITAL ISOLATORS
ISO7220AQDRQ1	TI	获取价格	DUAL DIGITAL ISOLATORS

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