Burr Brown ISO518P-U, ISO518P Datasheet

®

ISO518

ISO518

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information, visit www.burr-brown.com

ISOLATED DIGITAL COUPLERS

ISO518

Bidirectional

FEATURES

● LOW POWER CONSUMPTION:

< 12mW per Channel

● 1500Vrms ISOLATION:

100% Tested by Partial Discharge

● DOUBLE BUFFERED DESIGN FOR

EASY INTEGRATION INTO BUS-BASED
SYSTEMS

● TRI-STATE OUTPUTS

● 24-PIN PDIP OR GULL WING PACKAGES

● 2MWORDS/S TRANSFER RATE

APPLICATIONS

● PARALLEL ADCs/DACs

● DIGITAL INTERFACES

● DIGITAL TRANSMISSION

● GROUND-LOOP ISOLATION

L

L

S

A

H

T

I

C

F

H

T

DATA

I/O

A
T
C
H

DESCRIPTION

The ISO518 is an 8-channel, isolated, bidirectional
digital coupler based on the Burr-Brown capacitive
barrier technology.

The ISO518 is designed with input and output buffers
for ease of integration into a µP bus system. All data
pins are I/O under the control of the TX pins. Input
and output buffers are controlled by the latch enable
pins. This feature of the ISO518, which allows mul­tiple access to a data bus, requires extra circuitry when
using an alternative solution.

The ISO518 will transfer an 8-bit word at rates up to
2Mwords/s without the skew problems associated in
implementing this function with optocouplers. The
ISO518 is available in 24-pin PDIP or 24-pin Gull
Wing packages. Both are specified for operation from
–40°C to +85°C.

S

L

H

I
F
T

L

A

A
T
C
H

DATA

T

I/O

C

H

LEA

TXA/RXA

ISO518 Functional Block Diagram

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©

1998 Burr-Brown Corporation PDS-1423B Printed in U.S.A. June, 1999

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LEB
TXB/RXB

ISO518

®

SPECIFICATIONS

At TA = +25°C, and VS = +5V, unless otherwise noted.

ISO518P, P-U

PARAMETER CONDITIONS MIN TYP MAX UNITS

ISOLATION

Rated Voltage, Continuous V

ISO

Partial Discharge Voltage 1s, 5 x 5pC/cycle
Barrier Impedance >10
Leakage Current 240V, 60Hz 1 µA

Creepage Distance PDIP = “P” and “U” Package 11 mm
Internal Isolation Distance PDIP = “P” and “U” Package 0.1 mm
Transient Recovery Time 5kV/µs Edge 1 µs

DC CHARACTERISTICS

High Level Input Voltage V
Low Level Input Voltage V
Input Leakage Current I
Input Capacitance C
High Level Output Voltage V
Low Level Output Voltage V
Output Short-Circuit Current I

IH
IL

L

IN

OH

OL

OS

TIMING

LE Width (LOW) t
LE Width (HIGH) t
Data Set-Up to LEA/B t
Data Hold from LEA/B t
Propagation Delay t
Data Output Delay t
Output Rise and Fall Time t
Output Enable t
Output Disable t

WL

WH

SU

H

PD

LEO HIGH to Data Out Channels 35 ns

OD

RF

OE to Data Valid HIGH or LOW 35 ns

EN

DIS

Max Data Transfer Rate 2 Mw/s
Skew Between Any Two Channels 5 ns

POWER

Supply Voltage V
Supply Current I

Supply Current I

, V

SA

SB

SA/ B

SB/ A

TEMPERATURE RANGE

Operating –40 +85 °C
Storage –40 +125 °C
Thermal Resistance,

θ

JA

NOTES: (1) All devices receive a 1s test. Failure criterion is > 5pC pulses of ≥ 5pC per cycle. (2) Logic inputs are HCT-type and thresholds are a function of power supply
voltage with approximately 400mV hysteresis.

50Hz, 60Hz 1500 Vrms

(1)

2500 Vrms

14

|| 10 Ω/pF

2500V, 50Hz 12 µA

See Note 2 2 V
See Note 2 0.8 V

5nA

5pF
IOH = 6mA VS –1 V
IOL = 6mA 0.4 V

IS, max 30 mA

100 ns

15 ns
LEA/B HIGH to LOW 0 ns
LEA/B HIGH to LOW 20 ns

LEA/B LOW to Data Out 520 ns

10% to 90% Load = 50pF 9 14 ns

OE to Data HI-Z 35 ns

Either Side 4.5 5.5 V

Transmit Side DC 5 10 mA

Transmit Side DC Max Rate 7 15 mA

Receive Side DC 8 12 mA

Receive Side Max Rate 12 20 mA

+75 °C/W

The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN
assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject
to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not
authorize or warrant any BURR-BROWN product for use in life support devices and/or systems.

®

ISO518

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