ISC300 Datasheet | Burr-Brown

FEATURES q CALIBRATION CAPABILITY q q q q q q INTEGRAL SENSOR EXCITATION OPEN CIRCUIT SENSOR DETECTION LOW POWER: 80m W 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 20m A RECEIVER q TWO ISOLATED POWER SUPPLIES: ±13V at 5m A 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 ±100m V 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 1 99R 0.100V Current Reference - VISO R 1 Channel 4 A0 A1 O P T O Channel 3 1 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 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 channel at the factory, record the calibration data and periodically recalibrate the system while in use over time and ambient temperature changes. INPUT SELECT 1 +0.1V +10V Signal GAIN SELECT 0.5 50 SELECT and GAIN No Change No Change Latch RESET A1 0 0 1 1 A0 0 1 0 1 G 0 1 G A0 A1 RST 19 20 21 RST 1 1 1 0 CLK 0 1 ^ X 23 24 Input Side Output Side D 2 International Airport Industrial Park - Mailing Address: PO Box 11400 Tel: (520) 746-1111 - Twx: 910-952-1111 - Cable: BBRCORP - © - Tucson, AZ 85734 - Street Address: 6730 S. Tucson Blvd. - Tucson, AZ 85706 Telex: 066-6491 - FAX:...