XTR117

XTR117 SBOS344C − SEPTEMBER 2005 − REVISED MAY 2012 4-20mA Current-Loop Transmitter FEATURES D LOW QUIESCENT CURRENT: 130μA D 5V REGULATOR FOR EXTERNAL CIRCUITS D LOW SPAN ERROR: 0.05% D LOW NONLINEARITY ERROR: 0.003% D WIDE-LOOP SUPPLY RANGE: 7.5V to 40V D MSOP-8 AND DFN-8 PACKAGES APPLICATIONS D TWO-WIRE, 4-20mA CURRENT LOOP TRANSMITTER D SMART TRANSMITTER D INDUSTRIAL PROCESS CONTROL D TEST SYSTEMS D CURRENT AMPLIFIER D VOLTAGE-TO-CURRENT AMPLIFIER DESCRIPTION The XTR117 is a precision current output converter designed to transmit analog 4-20mA signals over an industry-standard current loop. It provides accurate current scaling and output current limit functions. The on-chip voltage regulator (5V) can be used to power external circuitry. A current return pin (IRET) senses any current used in external circuitry to assure an accurate control of the output current. The XTR117 is a fundamental building block of smart sensors using 4-20mA current transmission. The XTR117 is specified for operation over the extended industrial temperature range, −40°C to +125°C. RELATED 4-20mA PRODUCTS XTR115 XTR116 5V regulator output and 2.5V reference output 5V regulator output and 4.096V reference output NOTE: For 4-20mA complete bridge and RTO conditioner solutions, see the XTR product family website at www.ti.com. VREG 8 XTR117 RIN IIN 2 VIN IRET 3 A1 R1 2.475kΩ +5V Regulator V+ IO 7 B Q1 6 RLIM R2 25Ω E 5 IO = 100 VIN RIN 4 VLOOP RL Please be aware that an importa...