Overview
The XTR111AIDRCR, produced by Texas Instruments, is a precision voltage-to-current converter and transmitter. This device is designed to handle standard 0mA to 20mA or 4mA to 20mA analog signals, making it versatile for various industrial applications. It features an adjustable voltage regulator, output disable functionality, and an error detection circuit, enhancing its reliability and flexibility. The XTR111 is available in MSOP and DFN surface-mount packages, ensuring ease of integration into different system designs.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Power Supply Voltage (VVSP) | +8 | +40 | V | ||
| Operating Voltage (VVSP) | +7 | +44 | V | ||
| Quiescent Current (IQ) | IOUT = 0mA | 450 | 550 | μA | |
| Operating Temperature | –40 | +85 | °C | ||
| Storage Temperature | –55 | +125 | °C | ||
| Output Current Range | 0 | 36 | mA | ||
| Current Limit for Output Current | 42 | ±6 | mA | ||
| Nonlinearity, IOUT/ISET | μV/°C | ||||
| V-Regulator Output (REGF) | RLOAD = 5kΩ | 2.85 | 3.0 | 3.15 | V |
| Load Regulation | 0.6mA to 5mA | 3-5 mV/mA |
Key Features
- Adjustable Voltage Regulator: The onboard voltage regulator can be adjusted between 3V to 15V and delivers up to 5mA load current.
- Output Disable (OD): The device features an output disable function, which can be controlled by a logic input to reduce output glitches during power-on and power-off.
- Error Detection: An error detection circuit activates a logic output (error flag) in case the output current cannot correctly flow, indicating issues such as wire breaks or high load resistors.
- High Accuracy and Linearity: The XTR111 provides a precise current gain of 10, with low nonlinearity and drift over temperature.
- Wide Voltage Compliance: The output current is cascoded by an external P-Channel MOSFET transistor, allowing for large voltage compliance extending below ground.
- Digital Inputs and Outputs: Includes digital inputs for output control and error flag output for monitoring.
Applications
- Universal Voltage-Controlled Current Source: Suitable for applications requiring precise current control.
- Current or Voltage Output for 3-Wire Sensor Systems: Ideal for sensor excitation and signal conditioning in 3-wire sensor systems.
- PLC Output Programmable Driver: Can be used in programmable logic controllers (PLCs) for output programming.
- Current-Mode Sensor Excitation: Provides stable current for sensor excitation in various industrial and measurement systems.
Q & A
- What is the primary function of the XTR111?
The XTR111 is a precision voltage-to-current converter and transmitter designed to handle standard 0mA to 20mA or 4mA to 20mA analog signals.
- What is the adjustable range of the onboard voltage regulator?
The onboard voltage regulator can be adjusted between 3V to 15V.
- How does the output disable function work?
The output disable function is controlled by a logic input (OD pin) and can be used to reduce output glitches during power-on and power-off.
- What is the purpose of the error detection circuit?
The error detection circuit activates a logic output (error flag) if the output current cannot correctly flow, indicating issues such as wire breaks or high load resistors.
- What is the maximum output current range of the XTR111?
The XTR111 can deliver currents from 0mA to 36mA.
- What is the operating temperature range of the XTR111?
The operating temperature range is from –40°C to +85°C.
- What types of packages are available for the XTR111?
The XTR111 is available in MSOP and DFN surface-mount packages.
- How is the current limit for the output current managed?
The XTR111 does not provide internal current limit; an external current limit is recommended to protect the device.
- What is the purpose of the V-Regulator Output (REGF)?
The V-Regulator Output (REGF) provides a stable voltage for additional circuitry and can be set between 3V to 15V.
- What are some common applications of the XTR111?
Common applications include universal voltage-controlled current sources, current or voltage output for 3-wire sensor systems, PLC output programmable drivers, and current-mode sensor excitation.
