Overview
The XTR117AIDGKR, 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 a fundamental building block of smart sensors and is specified for operation over an extended industrial temperature range of –40°C to +125°C. It features an on-chip 5-V voltage regulator that can power external circuitry and includes a current return pin (IRET) to sense and accurately control the output current used in external circuitry.
Key Specifications
| Specification | Value |
|---|---|
| Package Type | VSON-8, VSSOP-8 |
| Number of Pins | 8 |
| Operating Temperature Range | –40°C to +125°C |
| Loop Supply Range | 7.5 V to 36 V |
| Quiescent Current | 130 µA |
| Span Error | 0.05% |
| Nonlinearity Error | 0.003% |
| Maximum Output Current | Approximately 32 mA (limited internally) |
| Voltage Regulator Output | 5 V |
Key Features
- Low quiescent current: 130 µA
- On-chip 5-V voltage regulator for powering external circuitry
- Low span error: 0.05%
- Low nonlinearity error: 0.003%
- Wide-loop supply range: 7.5 V to 36 V
- Temperature range: –40°C to +125°C
- Accurate current scaling and output current limit functions
- Current return pin (IRET) for sensing current used in external circuitry
- Reverse-voltage protection options
Applications
- Two-wire, 4-20mA current-loop transmitter
- Smart transmitter
- Industrial process control
- Test systems
- Current amplifier
- Voltage-to-current amplifier
Q & A
- What is the primary function of the XTR117AIDGKR?
The XTR117AIDGKR 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 XTR117AIDGKR?
The operating temperature range is –40°C to +125°C.
- What is the quiescent current of the XTR117AIDGKR?
The quiescent current is 130 µA.
- Does the XTR117AIDGKR have built-in voltage regulation?
Yes, it features an on-chip 5-V voltage regulator for powering external circuitry.
- What are the typical applications of the XTR117AIDGKR?
Typical applications include two-wire, 4-20mA current-loop transmitters, smart transmitters, industrial process control, test systems, current amplifiers, and voltage-to-current amplifiers.
- How does the XTR117AIDGKR protect against reverse voltage?
The device allows for reverse-voltage protection using diode bridge circuits or series diodes with minimal voltage loss.
- What is the maximum output current of the XTR117AIDGKR?
The maximum output current is approximately 32 mA, limited internally to protect the transmitter and loop power or measurement circuitry.
- Can the output current range of the XTR117AIDGKR be extended?
Yes, the output current range can be extended by connecting an external resistor from pin 3 to pin 5 to change the current limit value.
- What package types are available for the XTR117AIDGKR?
The device is available in VSON-8 and VSSOP-8 packages.
- How does the XTR117AIDGKR handle RF interference?
The device can be affected by RF interference, which can be mitigated by proper wiring and shielding of the current-loop connections.
