1

2

3

4

5

6

7

8

ISO 7520

9

10

11

12

13

14

15

16

OUTA

GND 1

VCC 1

GND 1

INB

GND 2

GND 2

INA

OUTB

VCC 2

NC

NC

NC

NC

NC

NC

1

2

3

4

5

6

7

8

ISO 7521

9

10

11

12

13

14

15

16

NC

INA

GND 1

VCC 1

GND 1

INB

GND 2

GND 2

OUTA

NC

OUTB

VCC 2

NC

NC

NC

NC

NC = No Internal Connection

ISO7520

ISO7521

www.ti.com

SLLSE39 – JUNE 2010

Low-Power 5 KV(rms) Dual Digital Isolators

Check for Samples: ISO7520, ISO7521

The devices have TTL input thresholds and require

1

FEATURES

two supply voltages, 3.3V or 5V, or any combination.

•

Highest Signaling Rate: 1 Mbps

All inputs are 5-V tolerant when supplied from a 3.3-V

•

Propagation Delay Less Than 20 ns

supply.

•

Low Power Consumption

Note: The ISO7520 and ISO7521 are specified for

•

Wide Ambient Temperature: –40°C to 105°C

signaling rates up to 1 Mbps. Due to their fast

response time, under most cases, these devices will

•

Safety and Regulatory Approvals

also transmit data with much shorter pulse widths.

–

5 KV(rms) for 1 minute per UL 1577

Designers should add external filtering to remove

–

CSA Component Acceptance Notice 5A

spurious signals with input pulse duration < 20 ns if

desired.

–

IEC 60747-5-2 (VDE 0884 Rev. 2)

–

IEC 60601-1, 60950-1, & 61010-1 End

Equipment Standards

•

50 kV/µs Transient Immunity Typical

•

Operates From 3.3V or 5V Supply and Logic

Levels

APPLICATIONS

•

Opto-Coupler Replacement in:

–

Medical Applications for IEC 60601-1

5KVrms Rated

–

Industrial Field-Bus

–

ProfiBus

–

ModBus

–

DeviceNetTM Data Buses

–

Servo Control Interface

–

Motor Control

–

Power Supply

–

Battery Packs

DESCRIPTION

The ISO7520 and ISO7521 provide double galvanic

isolation of up to 5KVrms for 1 minute per UL. These

digital isolators have two isolated channels with

uni-directional (ISO7520) and bi-directional (ISO7521)

channel configurations. Each isolation channel has a

logic input and output buffer separated by a silicon

with isolated power supplies, these devices prevent

noise currents on a data bus or other circuits from

entering the local ground and interfering with or

damaging sensitive circuitry.

1

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.

Copyright © 2010, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.