![](http://datasheet.mmic.net.cn/230000/ISO103_datasheet_15591446/ISO103_1.png)
Low-Cost, Internally Powered
ISOLATION AMPLIFIER
FEATURES
G
SIGNAL AND POWER IN ONE
DOUBLE-WIDE (0.6") SIDE-BRAZED
PACKAGE
G
5600Vpk TEST VOLTAGE
G
1500Vrms CONTINUOUS AC BARRIER
RATING
G
WIDE INPUT SIGNAL RANGE:
–10V to +10V
G
WIDE BANDWIDTH:
20kHz Small Signal, 20kHz Full Power
G
BUILT-IN ISOLATED POWER:
±
10V to
±
18V Input,
±
50mA Output
G
MULTICHANNEL SYNCHRONIZATION
CAPABILITY (TTL)
G
BOARD AREA ONLY 0.72in.
2
(4.6cm
2
)
APPLICATIONS
G
MULTICHANNEL ISOLATED DATA
ACQUISITION
G
ISOLATED 4-20mA LOOP RECEIVER AND
POWER
G
POWER SUPPLY AND MOTOR CONTROL
G
GROUND LOOP ELIMINATION
ISO103
DESCRIPTION
The ISO103 isolation amplifier provides both signal
and power across an isolation barrier. The ceramic
non-hermetic hybrid package with side-brazed pins
contains a transformer-coupled DC/DC converter and
a capacitor-coupled signal channel.
Extra power is available on the isolated input side for
external input conditioning circuitry. The converter is
protected from shorts to ground with an internal cur-
rent limit, and the soft-start feature limits the initial
currents from the power source. Multiple-channel syn-
chronization can be accomplished by applying a TTL
clock signal to paralleled Sync pins. The Enable con-
trol is used to turn off transformer drive while keeping
the signal channel demodulator active. This feature
provides a convenient way to reduce quiescent current
for low power applications.
The wide barrier pin spacing and internal insulation
allow for the generous 1500Vrms continuous rating.
Reliability is assured by 100% barrier breakdown
testing that conforms to UL1244 test methods. Low
barrier capacitance minimizes AC leakage currents.
These specifications and built-in features make the
ISO103 easy to use, as well as providing for compact
PC board layouts.
Duty Cycle
Modulator
Duty Cycle
Demodulator
Rectifiers
Filters
Oscillator
Driver
Sense
V
OUT
Com 2
–V
CC2
Sync*
+V
CC2
Enable
Gnd 2
+V
CC1
–V
CC1
Gnd 1
Com 1
V
IN
Ps Gnd
–V
C
+V
C
Sync
*Ground if not used
International Airport Industrial Park Mailing Address: PO Box 11400, Tucson, AZ 85734 Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 Tel: (520) 746-1111
Twx: 910-952-1111 Internet: http://www.burr-brown.com/ Cable: BBRCORP Telex: 066-6491 FAX: (520) 889-1510 Immediate Product Info: (800) 548-6132
ISO103
1989 Burr-Brown Corporation
PDS-1004E
Printed in U.S.A. August, 1999