4-20-mA current loop transmitter with 4.096-V reference and 200-μA power

The XTR115 and XTR116 (XTR11x) are precision

current output converters designed to transmit analog 4mA to 20mA signals over an industry

standard current loop. These devices 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 the XTR115

and 4.096V 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 4mA to 20mA current transmission.

The XTR11x are specified for operation over

the extended industrial temperature range, –40°C to +85°C.