ISO107

® ISO107 High-Voltage, Internally Powered ISOLATION AMPLIFIER FEATURES q SIGNAL AND POWER IN ONE TRIPLE-WIDE PACKAGE q 8000Vpk TEST VOLTAGE q 2500Vrms 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) APPLICATIONS q MULTICHANNEL ISOLATED DATA ACQUISITION q BIOMEDICAL INSTRUMENTATION q POWER SUPPLY AND MOTOR CONTROL q GROUND LOOP ELIMINATION ISO107 BLOCK DIAGRAM Sense VIN Duty Cycle Modulator Sync Duty Cycle Demodulator VOUT Com 2 –VCC2 Sync +VCC2 Oscillator Driver Enable Gnd 2 Com 1 +VCC1 Gnd 1 –VCC1 Rectifiers Filters DESCRIPTION The ISO107 isolation amplifier provides both signal and power across an isolation barrier. The ceramic side-brazed hybrid package contains a transformercoupled 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 control 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 appl...