REF200

® REF 200 REF200 REF 200 DUAL CURRENT SOURCE/CURRENT SINK FEATURES q COMPLETELY FLOATING: No Power Supply or Ground Connections q HIGH ACCURACY: 100µA ±0.5% q LOW TEMPERATURE COEFFICIENT: ±25ppm/°C q WIDE VOLTAGE COMPLIANCE: 2.5V to 40V q ALSO INCLUDES CURRENT MIRROR APPLICATIONS q SENSOR EXCITATION q BIASING CIRCUITRY q OFFSETTING CURRENT LOOPS q LOW VOLTAGE REFERENCES q CHARGE-PUMP CIRCUITRY q HYBRID MICROCIRCUITS DESCRIPTION The REF200 combines three circuit building-blocks on a single monolithic chip—two 100µA current sources and a current mirror. The sections are dielectrically isolated, making them completely independent. Also, since the current sources are twoterminal devices, they can be used equally well as current sinks. The performance of each section is individually measured and laser-trimmed to achieve high accuracy at low cost. The sections can be pin-strapped for currents of 50µA, 100µA, 200µA, 300µA or 400µA. External circuitry can be used to obtain virtually any current. These and many other circuit techniques are shown in the Applications section of this Data Sheet. The REF200 is available in plastic 8-pin mini-DIP and SOIC packages. I1 High 8 I2 High 7 Substrate 6 Mirror In 5 100µA 100µA 1 I1 Low 2 I2 Low 3 Mirror Common 4 Mirror Out 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-b...