ISO103

® ISO103 ISO 103 Low-Cost, Internally Powered ISOLATION AMPLIFIER FEATURES q SIGNAL AND POWER IN ONE DOUBLE-WIDE (0.6") SIDE-BRAZED PACKAGE q 5600Vpk TEST VOLTAGE q 1500Vrms CONTINUOUS AC BARRIER RATING q WIDE INPUT SIGNAL RANGE: –10V to +10V q WIDE BANDWIDTH: 20kHz Small Signal, 20kHz Full Power q BUILT-IN ISOLATED POWER: ±10V to ±18V Input, ±50mA Output q MULTICHANNEL SYNCHRONIZATION CAPABILITY (TTL) q BOARD AREA ONLY 0.72in.2 (4.6cm2) APPLICATIONS q MULTICHANNEL ISOLATED DATA ACQUISITION q ISOLATED 4-20mA LOOP RECEIVER AND POWER q POWER SUPPLY AND MOTOR CONTROL q GROUND LOOP ELIMINATION +VC V IN –VC Com 1 Gnd 1 +VCC1 Ps Gnd –VCC1 Rectifiers Filters Oscillator Driver Duty Cycle Modulator Duty Cycle Demodulator Sense V OUT Com 2 –VCC2 Sync* +VCC2 Enable Gnd 2 Sync 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 current limit, and the soft-start feature limits the initial currents from the power source. Multiple-channel synchronization can be accomplished by applying a TTL clock signal to paralleled Sync pins. The Enable con- *Ground if not used trol is used to turn off transformer drive while keeping the si...