Texas Instruments (TI) has introduced the XTR117, a highly accurate 4-20mA transmitter housed in an ultra-compact MSOP-8 package. This device is designed for precision applications and features minimal offset and range errors, enabling reliable over-scale performance and excellent noise suppression. With a maximum current consumption of 250µA, it's ideal for low-power systems.
As part of TI's Burr-Brown product line, the XTR117 supports a wide operating voltage range from 7.5V to 40V and can withstand surges up to 50V. Its small size and high accuracy make it well-suited for use in pressure, temperature, and humidity transmitters, as well as industrial process monitoring systems.
The XTR117 is built to perform reliably in harsh electrical environments. It provides a stable 5V supply at 3.75mA for external sensor conditioning circuits, ensuring consistent power delivery. The device only requires one external resistor to achieve a 100:1 Iout/Iin transfer function, simplifying design and reducing component count.
With its low quiescent current, precise 4-20mA scaling (no calibration needed), compact form factor, and cost-effectiveness, the XTR117 offers a superior alternative to discrete solutions for this type of application. It operates across a broad temperature range, from -40°C to 125°C, making it suitable for demanding industrial environments.
The XTR117 serves as an excellent core component for two-wire 4-20mA systems that condition sensor signals in various ways. It can be integrated with digital verification chips like the PGA309, low-power microcontrollers such as the MSP430, or combinations of instrumentation amplifiers with voltage references (e.g., INA122, INA118, REF31xx) or low-power op amps and references (e.g., OPA335, OPA344, REF32xx). This versatility makes it a powerful choice for engineers designing robust and efficient sensor interface solutions.
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