Texas Instruments

The XTR115 and XTR116 (XTR11x) are precision
current output converters designed to transmit analog
4-mA-to-20-mA signals over an industry standard
current loop. These devices provide accurate current
scaling and output current limit functions.
The on-chip voltage regulator (5 V) can be used
to power external circuitry. A precision on-chip VREF
(2.5 V for the XTR115 and 4.096 V for the XTR116)
can be used for offsetting or to excite transducers. A
current return pin (IRET) senses any current used in
external circuitry to provide an accurate control of the
output current.
The XTR11x are a fundamental building block
of smart sensors using 4-mA-to-20-mA current
transmission.
The XTR11x are specified for operation over the
extended industrial temperature range, –40°C to
+85°C.