Overview
The XTR115UA, 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 XTR115UA provides accurate current scaling and output current limit functions, making it a fundamental building block of 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 | Conditions | Min | Max | Units | |
|---|---|---|---|---|---|
| Power Supply Voltage (V+) | 7.5 | 24 | 36 | V | |
| Operating Temperature Range | –40 | 85 | °C | ||
| Output Current, Linear Range | 0.25 | 25 | mA | ||
| Overscale Limit (ILIM) | 32 | mA | |||
| Underscale Limit (IMIN) | IREF = 0, IREG = 0 | 0.2 | 0.25 | mA | |
| Span Error | ±0.05% | ±0.2% | % | ||
| Nonlinearity Error | ±0.003% | ±0.01% | % | ||
| VREF (XTR115) | 2.5 | V | |||
| Quiescent Current | 200 µA | µA |
Key Features
- Low quiescent current: 200 µA
- 5-V regulator for external circuits
- Precision on-chip VREF for sensor excitation: 2.5 V for XTR115
- 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 (IRET) for accurate control of output current
Applications
- 2-wire, 4-20-mA 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 XTR115UA?
The XTR115UA is designed to transmit analog 4-mA-to-20-mA signals over an industry standard current loop.
- What is the operating temperature range of the XTR115UA?
The XTR115UA operates over an extended industrial temperature range of –40°C to +85°C.
- What is the quiescent current of the XTR115UA?
The quiescent current of the XTR115UA is 200 µA.
- What is the VREF value for the XTR115UA?
The VREF value for the XTR115UA is 2.5 V.
- What is the span error of the XTR115UA?
The span error of the XTR115UA is 0.05%.
- What is the nonlinearity error of the XTR115UA?
The nonlinearity error of the XTR115UA is 0.003%.
- What is the package type of the XTR115UA?
The XTR115UA is packaged in an SO-8 package.
- What are some common applications of the XTR115UA?
Common applications include 2-wire, 4-20-mA current loop transmitters, smart transmitters, industrial process control, test systems, and compatibility with HART modem.
- Can the XTR115UA be used to power external circuits?
Yes, the XTR115UA has an on-chip 5-V regulator that can be used to power external circuitry.
- How does the current return pin (IRET) function?
The current return pin (IRET) senses any current used in external circuitry to provide an accurate control of the output current.
