Overview
The XTR111, produced by Texas Instruments, is a precision voltage-to-current converter and transmitter designed to deliver high accuracy and reliability in industrial applications. This device is capable of sourcing currents from 0mA to 36mA, making it suitable for standard 0mA to 20mA or 4mA to 20mA analog signals. The XTR111 features an internal voltage regulator, adjustable between 3V to 15V, and delivers up to 5mA load current. It is particularly useful in 3-wire sensor systems for signal conditioning and sensor excitation.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Power Supply Voltage (VVSP) | +44 | V | |||
| Operating Temperature | -55 | +125 | °C | ||
| Storage Temperature | -55 | +150 | °C | ||
| Output Current Range | 0 | 36 | mA | ||
| Current Limit for Output Current | 42 ± 6 | mA | |||
| V-Regulator Output (REGF) Voltage Reference | RLOAD = 5kΩ | 2.85 | 3.0 | 3.15 | V |
| V-Regulator Output (REGF) Load Regulation | 0.6mA to 5mA | 5 | mV/mA | ||
| V-Regulator Output (REGF) Supply Regulation | RLOAD = 5kΩ | 0.01 | mV/V |
Key Features
- Precision Voltage-to-Current Conversion: The XTR111 converts input voltage to output current with high accuracy, suitable for industrial analog signals.
- Adjustable Voltage Regulator: The onboard voltage regulator can be adjusted between 3V to 15V and delivers up to 5mA load current.
- High Output Compliance: The output current is cascoded by an external P-Channel MOSFET transistor, allowing for large voltage compliance extending below ground.
- Low Interference: The device ensures excellent suppression of typical interference signals due to its high output impedance and wide voltage compliance.
- Flexible Input Range: The input voltage range can be freely set according to the application requirement using an external resistor, RSET.
Applications
The XTR111 is primarily used in 3-wire sensor systems for signal conditioning and sensor excitation. It is suitable for various industrial applications where precise current sourcing is required, such as in process control, automation, and measurement systems.
Q & A
- What is the maximum output current of the XTR111?
The XTR111 can source up to 36mA of output current. - What is the operating temperature range of the XTR111?
The operating temperature range is from -55°C to +125°C. - Can the XTR111 be used for high-frequency applications?
No, the XTR111 has a bandwidth of approximately 1MHz, making it unsuitable for high-frequency applications beyond this range. - How is the output current controlled in the XTR111?
The output current is controlled by an external resistor, RSET, which defines the voltage-to-current ratio. - What is the purpose of the onboard voltage regulator in the XTR111?
The onboard voltage regulator can be adjusted between 3V to 15V and delivers up to 5mA load current, primarily for signal conditioning and sensor excitation. - Is the XTR111 suitable for new designs?
No, the XTR111 has been announced for discontinuation and is not recommended for new designs. - What is the maximum supply voltage for the XTR111?
The maximum supply voltage is 44V. - How does the XTR111 handle interference signals?
The device ensures excellent suppression of typical interference signals due to its high output impedance and wide voltage compliance. - Can the XTR111 be used in 3-wire sensor systems?
Yes, the XTR111 is particularly useful in 3-wire sensor systems for signal conditioning and sensor excitation. - What is the load regulation of the V-Regulator Output (REGF)?
The load regulation of the V-Regulator Output (REGF) is 5 mV/mA over a load range of 0.6mA to 5mA.
