Overview
The XTR116U/2K5G4, 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 XTR116 is specifically tailored with a 4.096V on-chip voltage reference (VREF) for sensor excitation and other applications. It provides accurate current scaling and output current limit functions, making it a fundamental building block for smart sensors and industrial process control systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| On-chip VREF | 4.096 | V |
| Quiescent Current | 200 | μA |
| 5-V Regulator Voltage | 5 | V |
| Output Current Equation | IO = IIN × 100 | |
| Output Current, Linear Range | 0.25 to 25 | mA |
| Over-Scale Limit | 32 | mA |
| Under-Scale Limit | 0.2 to 0.25 | mA |
| Span (Current Gain) | 100 | A/A |
| Error vs Temperature | ±0.05% to ±0.4% (TA = –40°C to +85°C) | % |
| Nonlinearity | ±0.003% to ±0.02% (IIN = 250 μA to 25 mA) | % |
| Operating Temperature Range | –40°C to +85°C | °C |
| Loop Supply Voltage Range | 7.5 V to 36 V | V |
| Package Type | SO-8 (SOIC-8) |
Key Features
- Low quiescent current: 200 μA
- 5-V regulator for external circuits
- Precision on-chip VREF: 4.096 V for sensor excitation
- Low span error: 0.05%
- Low nonlinearity error: 0.003%
- Wide loop supply range: 7.5 V to 36 V
- SO-8 package (SOIC-8)
- Accurate current scaling and output current limit functions
- Current return pin (IRET) for accurate control of output current
Applications
- 2-wire, 4-20-mA current loop transmitters
- Smart transmitters
- Industrial process control systems
- Test systems
- Compatible with HART modem
- Current amplifiers
- Voltage-to-current amplifiers
Q & A
- What is the primary function of the XTR116U/2K5G4?
The XTR116U/2K5G4 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 value of the on-chip VREF for the XTR116U/2K5G4?
The on-chip VREF for the XTR116U/2K5G4 is 4.096 V.
- What is the quiescent current of the XTR116U/2K5G4?
The quiescent current of the XTR116U/2K5G4 is 200 μA.
- What is the operating temperature range of the XTR116U/2K5G4?
The operating temperature range of the XTR116U/2K5G4 is –40°C to +85°C.
- What is the loop supply voltage range for the XTR116U/2K5G4?
The loop supply voltage range for the XTR116U/2K5G4 is 7.5 V to 36 V.
- What package type does the XTR116U/2K5G4 come in?
The XTR116U/2K5G4 comes in an SO-8 (SOIC-8) package.
- What are some common applications of the XTR116U/2K5G4?
Common applications include 2-wire, 4-20-mA current loop transmitters, smart transmitters, industrial process control systems, test systems, and voltage-to-current amplifiers.
- How does the XTR116U/2K5G4 ensure accurate control of the output current?
The XTR116U/2K5G4 ensures accurate control of the output current through a current return pin (IRET) that senses any current used in external circuitry.
- What is the span error and nonlinearity error of the XTR116U/2K5G4?
The span error is 0.05%, and the nonlinearity error is 0.003%.
- Can the XTR116U/2K5G4 be used with HART modems?
Yes, the XTR116U/2K5G4 is compatible with HART modems.
- How does the 5-V regulator in the XTR116U/2K5G4 function?
The 5-V regulator in the XTR116U/2K5G4 can be used to power external circuitry.
