XTR115UG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The XTR115UG4 is a precision 4 mA to 20 mA current loop transmitter IC for industrial sensor interfaces. It converts a voltage or resistor input into a standardized two-wire 4-20 mA output with high accuracy and loop-powered operation. Available in an 8-pin SOIC package for compact transmitter module designs.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- XTR115UG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of XTR115UG4?
- 4 mA to 20 mA two-wire current loop output compatible with all standard industrial PLC and DCS inputs
- Loop-powered operation drawing supply from the current loop itself, eliminating the need for a separate power supply wire
- High precision output accuracy with low nonlinearity for temperature, pressure, and flow sensor transmitters
- Integrated current regulator accepts resistor or voltage programming for flexible span and zero adjustment
- 8-pin SOIC package enables compact field-transmitter PCB designs with 260°C peak reflow compatibility
What is XTR115UG4 used for?
The XTR115UG4 is used in industrial field transmitters to convert sensor signals from RTDs, thermocouples, strain gauges, and pressure transducers into the universally accepted 4-20 mA current loop standard for transmission over distances up to 1 km without signal degradation. Its loop-powered architecture means the transmitter operates entirely from the current loop supply, requiring only a 2-wire connection back to the control room PLC or DCS input card. It also serves smart sensor modules, process analyzers, and data acquisition systems where accurate current-mode signaling is required in electrically noisy industrial environments.
What are the specifications of XTR115UG4?
| YTEOL | 0 |
| Analog IC - Other Type | ANALOG CIRCUIT |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 36V |
| Supply Voltage-Min (Vsup) | 7.5V |
| Supply Voltage-Nom (Vsup) | 24V |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| HTS Code | 8542.39.00.01 |
Where can I find the XTR115UG4 datasheet?
XTR115UG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for XTR115UG4?
Compatible alternatives and drop-in replacements for XTR115UG4:
Frequently Asked Questions
What output current range does the XTR115UG4 produce and why is this range the industrial standard?
The XTR115UG4 generates a 4 mA to 20 mA output current, the universally adopted industrial standard where 4 mA represents the zero or live-zero condition and 20 mA represents full-scale output. The live-zero convention allows control systems to distinguish a valid 4 mA zero-signal reading from an open-circuit fault at 0 mA, providing built-in wire-break detection across the full 1 km loop distance.
How does the loop-powered architecture of the XTR115UG4 reduce wiring costs in field installations?
The XTR115UG4 extracts its operating supply current from the same 2-wire loop that carries the 4-20 mA signal, eliminating the need for a separate power cable to the field transmitter. This 2-wire approach reduces cable installation cost by up to 50% compared to 4-wire transmitters, and simplifies hazardous-area installations where the number of conductors entering an explosion-proof enclosure is minimized for safety compliance.
Over what transmission distance can the XTR115UG4 maintain signal accuracy and what limits this range?
The 4-20 mA current loop driven by the XTR115UG4 can span up to 1 km of shielded twisted-pair cable because current-mode signaling is immune to resistive voltage drops along the conductor. Accuracy is limited by the total loop resistance, which must stay below the compliance voltage of the loop supply divided by 20 mA; for a 24 V loop supply, total resistance up to 1200 ohms is allowable, accommodating standard 0.5 mm² cable at that distance.
What sensor types can interface directly with the XTR115UG4 for industrial measurement transmitters?
The XTR115UG4 accepts resistive and voltage inputs, making it compatible with RTD bridges, strain-gauge Wheatstone bridges, thermocouples with cold-junction compensation circuits, and potentiometer-type displacement sensors. A precision external resistor network sets the zero (4 mA) and span (20 mA) points, allowing calibration to match sensors with output ranges from a few millivolts to several volts full-scale.
When would a designer choose the XTR115 over the XTR116 for a pressure transmitter design?
The XTR115 includes an internal 2.5 V voltage reference for biasing bridge sensors, whereas the XTR116 omits this reference and targets applications where an external reference is already available. For a pressure transmitter using a 350-ohm strain-gauge bridge that needs a ratiometric 2.5 V excitation, the XTR115UG4 eliminates one external reference IC and reduces the total component count by 3 to 4 parts, simplifying the bill of materials and PCB layout.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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