Current Loop Transmitter 8-Pin SOIC Tube

The XTR115 and XTR116 are precision current output converters designed to transmit analog 4-to-20mA signals over an industry standard current loop. They provide accurate current scaling and output current limit functions. The on-chip voltage regulator (5V) can be used to power external circuitry. A precision on-chip VREF (2.5V for XTR115 and 4.096V for XTR116) can be used for offsetting or to excite transducers. A current return pin (IRET) senses any current used in external circuitry to assure an accurate control of the output current. The XTR115 is a fundamental building block of smart sensors using 4-to-20mA current transmission. The XTR115 and XTR116 are specified for operation over the extended industrial temperature range, -40°C to +85°C.

LOW QUIESCENT CURRENT: 200µA

5V REGULATOR FOR EXTERNAL CIRCUITS

V REF FOR SENSOR EXCITATION:
   XTR115: 2.5V
   XTR116: 4.096V

LOW SPAN ERROR: 0.05%

LOW NONLINEARITY ERROR: 0.003%

WIDE LOOP SUPPLY RANGE: 7.5V to 36V

SO-8 PACKAGE

APPLICATIONS

• 2-WIRE, 4-20mA CURRENT LOOP TRANSMITTER
• SMART TRANSMITTER
• INDUSTRIAL PROCESS CONTROL
• TEST SYSTEMS
• COMPATIBLE WITH HART MODEM
• CURRENT AMPLIFIER
• VOLTAGE-TO-CURRENT AMPLIFIER