Overview
The XTR116U, produced by Texas Instruments, is a precision current output converter designed to transmit analog 4-mA-to-20-mA signals over an industry standard current loop. This device is part of the XTR11x series, which includes the XTR115 and XTR116 models. The XTR116U provides accurate current scaling and output current limit functions, making it a fundamental building block for smart sensors using 4-mA-to-20-mA current transmission. It operates over an extended industrial temperature range of –40°C to +85°C and is packaged in an SO-8 package.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Package | SOIC (D) | - |
| Pins | 8 | - |
| Operating Temperature Range | –40 to 85 | °C |
| Quiescent Current | 200 µA | µA |
| Voltage Regulator | 5 V | V |
| V REF for Sensor Excitation | 4.096 V | V |
| Span Error | 0.05% | % |
| Nonlinearity Error | 0.003% | % |
| Loop Supply Range | 7.5 V to 36 V | V |
| Output Current Linear Range | 0.25 to 25 mA | mA |
| Over-Scale Limit | 32 mA | mA |
| Under-Scale Limit | 0.2 mA | mA |
Key Features
- Low quiescent current: 200 µA
- 5-V regulator for external circuits
- Precision on-chip V REF (4.096 V) for sensor excitation or offsetting
- Low span error: 0.05%
- Low nonlinearity error: 0.003%
- Wide loop supply range: 7.5 V to 36 V
- SO-8 package
- Current return pin (I RET) for accurate control of output current
Applications
- 2-wire, 4-20mA current loop transmitters
- Smart transmitters
- Industrial process control
- Test systems
- Compatible with HART modem
- Current amplifier
- Voltage-to-current amplifier
Q & A
- What is the primary function of the XTR116U?
The XTR116U is a precision current output converter designed to transmit analog 4-mA-to-20-mA signals over an industry standard current loop.
- What is the operating temperature range of the XTR116U?
The XTR116U operates over an extended industrial temperature range of –40°C to +85°C.
- What is the quiescent current of the XTR116U?
The quiescent current of the XTR116U is 200 µA.
- What is the voltage of the on-chip V REF for the XTR116U?
The on-chip V REF for the XTR116U is 4.096 V.
- What is the span error of the XTR116U?
The span error of the XTR116U is 0.05%.
- What is the loop supply range of the XTR116U?
The loop supply range of the XTR116U is 7.5 V to 36 V.
- What package type is the XTR116U available in?
The XTR116U is available in an SO-8 package.
- What are some common applications of the XTR116U?
Common applications include 2-wire, 4-20mA current loop transmitters, smart transmitters, industrial process control, test systems, and compatibility with HART modem.
- Does the XTR116U have a built-in voltage regulator?
Yes, the XTR116U has a built-in 5-V regulator for powering external circuits.
- How does the current return pin (I RET) function in the XTR116U?
The current return pin (I RET) senses any current used in external circuitry to provide accurate control of the output current.
