Burr Brown ISO124U-1K, ISO124U, ISO124P Datasheet

1

®

ISO124

FEATURES

● 100% TESTED FOR HIGH-VOLTAGE

BREAKDOWN

● RATED 1500Vrms

● HIGH IMR: 140dB at 60Hz

● 0.010% max NONLINEARITY

● BIPOLAR OPERATION: V

O

= ±10V

● 16-PIN PLASTIC DIP AND 28-LEAD SOIC

● EASE OF USE: Fixed Unity Gain

Configuration

●

±4.5V to ±18V SUPPLY RANGE

APPLICATIONS

● INDUSTRIAL PROCESS CONTROL:

Transducer Isolator, Isolator for Thermo­couples, RTDs, Pressure Bridges, and
Flow Meters, 4mA to 20mA Loop Isolation

● GROUND LOOP ELIMINATION

● MOTOR AND SCR CONTROL

● POWER MONITORING

● PC-BASED DATA ACQUISITION

● TEST EQUIPMENT

ISO124

DESCRIPTION

The ISO124 is a precision isolation amplifier incor­porating a novel duty cycle modulation-demodulation
technique. The signal is transmitted digitally across
a 2pF differential capacitive barrier. With digital modu­lation the barrier characteristics do not affect signal
integrity, resulting in excellent reliability and good high
frequency transient immunity across the barrier. Both
barrier capacitors are imbedded in the plastic body of
the package.

The ISO124 is easy to use. No external components
are required for operation. The key specifications are

0.010% max nonlinearity, 50kHz signal bandwidth,
and 200µV/°C V

OS

drift. A power supply range of

±4.5V to ±18V and quiescent currents of ±5.0mA on
V

S1

and ±5.5mA on VS2 make these amplifiers ideal

for a wide range of applications.
The ISO124 is available in 16-pin plastic DIP and 28-

lead plastic surface mount packages.

®

Precision Lowest Cost

ISOLA TION AMPLIFIER

International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: [phone] • Twx: 910-952-1111

Internet: http://www.burr-brown.com/ • FAXLine: [phone] (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]

©

1997 Burr-Brown Corporation PDS-1405A Printed in U.S.A. September, 1997

+V

S1

V

IN

V

OUT

–V

S1

+V

S2

Gnd

–V

S2

Gnd



ISO124

ISO124

2

®

ISO124

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.

SPECIFICATIONS

At TA = +25°C , VS1 = VS2 = ±15V, and RL = 2kΩ, unless otherwise noted.

ISO124P, U
PARAMETER CONDITIONS MIN TYP MAX UNITS
ISOLATION

Rated Voltage, continuous ac 60Hz 1500 Vac
100% Test

(1)

1s, 5pc PD 2400 Vac
Isolation Mode Rejection 60Hz 140 dB
Barrier Impedance 10

14

|| 2 Ω || pF

Leakage Current at 60Hz V

ISO

= 240Vrms 0.18 0.5 µArms

GAIN V

O

= ±10V
Nominal Gain 1 V/V
Gain Error ±0.05 ±0.50 %FSR

Gain vs Temperature ±10 ppm/°C
Nonlinearity

(2)

±0.005 ±0.010 %FSR

INPUT OFFSET VOLTAGE

Initial Offset ±20 ±50 mV

vs Temperature ±200 µV/°C
vs Supply ±2 mV/V

Noise 4 µV/√Hz

INPUT

Voltage Range ±10 ±12.5 V
Resistance 200 kΩ

OUTPUT

Voltage Range ±10 ±12.5 V
Current Drive ±5 ±15 mA
Capacitive Load Drive 0.1 µF
Ripple Voltage

(3)

20 mVp-p

FREQUENCY RESPONSE

Small Signal Bandwidth 50 kHz
Slew Rate 2V/µs
Settling Time V

O

= ±10V

0.1% 50 µs

0.01% 350 µs

Overload Recovery Time 150 µs

POWER SUPPLIES

Rated Voltage ±15 V
Voltage Range ±4.5 ±18 V
Quiescent Current: V

S1

±5.0 ±7.0 mA

V

S2

±5.5 ±7.0 mA

TEMPERATURE RANGE

Specification –25 +85 °C
Operating –25 +85 °C
Storage –40 +85 °C
Thermal Resistance,

θ

JA

100 °C/W

θ

JC

65 °C/W

NOTES: (1) Tested at 1.6 X rated, fail on 5pC partial discharge. (2) Nonlinearity is the peak deviation of the output voltage from the best-fit straight line. It is expressed
as the ratio of deviation to FSR. (3) Ripple frequency is at carrier frequency (500kHz).

3

®

ISO124

1

2

28

27

16

15

13

14

+V

S1



–V

S1

V

OUT

Gnd

Gnd

V

IN

–V

S2

+V

S2

Top View —P Package Top View—U Package

CONNECTION DIAGRAM

ABSOLUTE MAXIMUM RATINGS

(1)

Supply Voltage................................................................................... ±18V

V

IN

......................................................................................................±100V

Continuous Isolation Voltage ..................................................... 1500Vrms

Junction Temperature .................................................................... +150°C

Storage Temperature....................................................................... +85°C

Lead Temperature (soldering, 10s)................................................ +300°C

Output Short to Common ......................................................... Continuous

NOTE: (1) Stresses above these ratings may cause permanent damage.

PACKAGE INFORMATION

PACKAGE DRAWING

PRODUCT PACKAGE NUMBER

(1)

ISO124P 16-Pin Plastic DIP 238
ISO124U 28-Lead Plastic SOIC 217-1

NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix C of Burr-Brown IC Data Book.

1

2

16

15

10

9

7

8

+V

S1



–V

S1

V

OUT

Gnd

Gnd

V

IN

–V

S2

+V

S2

ELECTROSTATIC
DISCHARGE SENSITIVITY

This integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.

ESD damage can range from subtle performance degrada­tion to complete device failure. Precision integrated circuits
may be more susceptible to damage because very small
parametric changes could cause the device not to meet its
published specifications.

NONLINEARITY

PRODUCT PACKAGE MAX %FSR

ISO124P 16-Pin Plastic DIP ±0.010
ISO124U 28-Lead Plastic SOIC ±0.010

ORDERING INFORMATION

4

®

ISO124

Time (µs)

Time (µs)

+10

0

–10

0

STEP RESPONSE

500 1000

TYPICAL PERFORMANCE CURVES

At TA = +25°C, and VS = ±15V, unless otherwise noted.

+10

0

–10

0

SINE RESPONSE

(f = 2kHz)

Output Voltage (V)

Output Voltage (V)

SINE RESPONSE

(f = 20kHz)

Time (µs)

+10

0

–10

0

100

50

Output Voltage (V)

Time (µs)

+10

0

–10

0

STEP RESPONSE

100

50

Output Voltage (V)

1000500

ISOLATION VOLTAGE

vs FREQUENCY

Frequency (Hz)

Peak Isolation Voltage

100 1k 10k 100k 1M 10M 100M

1k

100

0

2.1k

Degraded

Performance

Typical

Performance

Max DC Rating

IMR vs FREQUENCY

Frequency (Hz)

IMR (dB)

160

140

120

100

80

60

40

1 10 100 1k 10k 100k 1M