ISC300

® ISC300 Universal Precision Isolated MEASUREMENT CHANNEL www.DataSheet4U.com FEATURES q CALIBRATION CAPABILITY q q q q q q INTEGRAL SENSOR EXCITATION OPEN CIRCUIT SENSOR DETECTION LOW POWER: 80mW INSTRUMENT AMPLIFIER INPUT PROGRAMMABLE GAIN 12-BIT LINEARITY APPLICATIONS q UNIVERSAL INPUT CHANNEL FOR PROCESS CONTROL SYSTEMS q ISOLATED MEASUREMENT CHANNEL FOR THERMOCOUPLE, RTD AND VOLTAGE TRANSDUCERS q CHANNEL TO CHANNEL ISOLATED MULTIPLEXED SYSTEMS q ISOLATED 4 TO 20mA RECEIVER q TWO ISOLATED POWER SUPPLIES: ±13V at 5mA q LOW DRIFT 10V REFERENCE DESCRIPTION The ISC300 is an isolated measurement channel with open circuit sensor detection for use with RTD and thermocouple temperature sensors. In addition to temperature measurement, the ISC300 can accept full scale input voltages of ±100mV and ±10V which allows use with other sensors such as pressure, humidity and flow sensors. The low level resistance measurement capability also allows stimulus and measure9 2 +VISO –VISO 20M 8 Sense 2 5 6 +IP Filter –IP 20M 3 Sense 1 –VISO Ref 1 4 7 10 VREF IREF1 IREF2 Com 1 99R 0.100V Current Reference –VISO R Com 1 Channel 4 A0 A1 O P T O Channel 3 Com 1 Com 2 VDD (+5) CLK C O U P L E L A T C H 18 22 10.0V MUX Channel 2 VCC (+15) 25 Rectify Power CKI Com 2 26 27 Channel 1 Out PGA Modulate Demod +VISO Out 28 Barrier ment of strain gauges. The measurement channel has a highly stable internal reference which can be selected from the output side. This allows the user to calibrate each chan...