Overview
The XTR111AIDGQTG4 from Texas Instruments is a precision voltage-to-current converter and transmitter designed for industrial applications. It is capable of delivering currents from 0mA to 36mA, with a primary focus on the standard 0mA to 20mA or 4mA to 20mA analog signal ranges. The device features an adjustable voltage regulator output that can be set between 3V and 15V, providing supply voltage for additional circuitry. It is available in MSOP and DFN surface-mount packages.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Power Supply Voltage (VVSP) | +7 | +44 | V | ||
| Operating Temperature | –40 | +85 | °C | ||
| Storage Temperature | –55 | +125 | °C | ||
| Transfer Function | IOUT = 10 × VVIN/RSET | 0.1 | 25 | mA | |
| Current Limit for Output Current | 42 ± 6 | mA | |||
| Nonlinearity, IOUT/ISET | 0.1mA to 25mA | 0.002 | 0.02 | % of Span | |
| V-Regulator Output (REGF) Voltage Reference | RLOAD = 5kΩ | 2.85 | 3.0 | 3.15 | V |
| Digital Input (OD) Low-Level Threshold | 0.6 | V | |||
| Digital Output (EF) Low-Level Output Voltage | IEF = 2.2mA | 0.8 | V |
Key Features
- Easy-to-design input/output ranges: Supports standard 0mA to 20mA or 4mA to 20mA analog signals.
- Adjustable voltage regulator: Provides an adjustable output between 3V and 15V for additional circuitry.
- Output disable (OD) and error flag (EF): Allows for output disable and indicates errors such as wire breaks or high load resistors.
- High accuracy and low nonlinearity: Ensures precise current output with low offset drift and nonlinearity.
- Wide supply range: Operates from 7V to 44V supply voltage.
- External P-Channel MOSFET for high compliance voltage: Extends voltage compliance below ground and ensures easy power dissipation.
Applications
- Universal voltage-controlled current source
- Current or voltage output for 3-wire sensor systems
- PLC output programmable driver
- Current-mode sensor excitation
- Signal conditioning and sensor excitation in industrial environments
Q & A
- What is the primary function of the XTR111AIDGQTG4?
The XTR111AIDGQTG4 is a precision voltage-to-current converter and transmitter designed to deliver currents from 0mA to 36mA, particularly for the standard 0mA to 20mA or 4mA to 20mA analog signal ranges.
- What is the adjustable voltage range of the onboard regulator?
The onboard voltage regulator can be adjusted between 3V and 15V.
- What are the typical operating temperature and storage temperature ranges for the XTR111AIDGQTG4?
The operating temperature range is –40°C to +85°C, and the storage temperature range is –55°C to +125°C.
- How is the output current controlled in the XTR111AIDGQTG4?
The output current is controlled by an external resistor RSET, with the transfer function defined as IOUT = 10 × VVIN/RSET.
- What is the purpose of the output disable (OD) and error flag (EF) features?
The output disable feature allows the output to be disabled, and the error flag indicates errors such as wire breaks or high load resistors.
- What is the maximum supply voltage for the XTR111AIDGQTG4?
The maximum supply voltage is 44V.
- What are some common applications of the XTR111AIDGQTG4?
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.
- How does the external P-Channel MOSFET enhance the functionality of the XTR111AIDGQTG4?
The external P-Channel MOSFET ensures high output resistance and a broad compliance voltage range that extends below ground, facilitating easy power dissipation.
- What is the significance of the I-Mirror in the XTR111AIDGQTG4?
The I-Mirror has a precise current gain of 10, which helps in controlling 1/10 of the output current and ensures a precise transfer function.
- Can the XTR111AIDGQTG4 be used in high-temperature environments?
Yes, the device can operate in temperatures ranging from –40°C to +85°C and can be stored in temperatures from –55°C to +125°C.
