XTR111AIDGQR Alternatives, Pinout, Advantages and Working Principle
16 April 2024
Ⅱ. XTR111AIDGQR pin diagram and description
Ⅲ. XTR111AIDGQR's external current limit
Ⅳ. XTR111AIDGQR technical advantages
Ⅴ. Schematic diagram and working principle of XTR111AIDGQR
Ⅵ. Application areas of XTR111AIDGQR
Ⅶ. How to deal with the failure of XTR111AIDGQR?
XTR111AIDGQR is a precision current output sensor signal conditioner manufactured by Texas Instruments. It has a high degree of accuracy, low power consumption, powerful programmability and excellent anti-jamming ability and many other advantages, so it is widely used in instrumentation, communications equipment, medical equipment and industrial automation and other fields. In these applications, the XTR111AIDGQR is responsible for amplifying, filtering, linearizing and current outputting the sensor signals, thus providing great convenience for subsequent data acquisition, processing and control. In this article, the pin function, advantageous features, working principle and application scenarios of XTR111AIDGQR will be introduced in detail.
The XTR111AIDGQR is a precision voltage-to-current converter designed for standard 0mA to 20mA or 4mA to 20mA analog signals from sources up to 36mA. The ratio between input voltage and output current is set by a single resistor, RSET. In addition, the circuit can be modified to voltage output mode. XTR111AIDGQR not only has low power consumption, but also has high-speed processing capabilities, so it can meet various power consumption and speed requirements. As a dedicated chip, it has many functions and features, such as a built-in gain amplifier, analog-to-digital converter, and data processor, which enable the XTR111AIDGQR to meet the diverse needs of different users. The XTR111AIDGQR also supports various communication interfaces, such as SPI and I2C, which enable users to easily connect and communicate with other systems. This chip is widely used in various analog signal processors, such as light sensors, pressure sensors and temperature sensors. Its high-precision ADC/DAC function enables users to acquire and process analog signals more accurately, which further enhances system performance and stability.
Alternatives and equivalents:
• XTR111AIDGQTG4
Pin 1 (VSP): Positive supply
Pin 2 (IS): Source connection
Pin 3 (VG): Gate driver
Pin 4 (REGS): Regulator sense
Pin 5 (REGF): Regulator force
Pin 6 (VIN): Input voltage
Pin 7 (SET): Transconductance set
Pin 8 (EF’): Error flag (active low)
Pin 9 (OD): Output disable (active high)
Pin 10 (GND): Negative supply
The XTR111AIDGQR does not provide internal current limit for the case of when the external FET is forced to low impedance. The internal current source controls the current, but a high current from IS to GND forces an internal voltage clamp between VSP and IS to turn on. This results in a low resistance path and the current is only limited by the load impedance and the current capability of the external FET. A high current can destroy the IC. With the current loop interrupted (the load disconnected) the external FET is fully turned on with large gate to source voltage stored in the gate capacitance. In the moment the loop is closed (the load connected) current flows into the load. But for the first few micro-seconds the MOSFET is still turned on and destructive current can flow, depending on the load impedance.
An external current limit is recommended to protect the XTR111AIDGQR from this condition. The figure (a) shows an example of a current limit circuit. The current should be limited to 50mA. The 15Ω resistor (R6) limits the current to approximately 37mA (33mA when hot). The PNP transistor should allow a peak current of several hundred mA. An example device is the (KST) 2907. Power dissipation is not normally critical because the peak current duration is only a few micro-seconds. However, observe the leakage current through the transistor from Is to VG. The addition of this current limiting transistor and R6 still require time to discharge the gate of the external MOSFET. R7 and C3 are added for this reason, as well as to limit the steepness of external distortion pulses. Additional EMI and over-voltage protection may be required according to the application.
The figure (b) is a universal and basic current limiter circuit, using PNP and NPN transistors that can be connected in the source (IS to S) or in the drain output (in series with the current path). This circuit does not contribute to leakage currents. Consider adding an output filter like R7 and C3 in this limiter circuit.
Some of the main technical advantages of XTR111AIDGQR are listed below:
1. Low power consumption: XTR111AIDGQR focuses on power consumption control. Its low-power design allows the device to maintain low energy consumption during long periods of operation, helping to extend the life of the device and reduce operating costs.
2. High linearity: The XTR111AIDGQR has a high linearity and can accurately measure the input current and output the corresponding voltage signal. This enables a good linear relationship between the output signal and the input signal, avoiding signal distortion or aberration and improving the accuracy of the data.
3. Wide input voltage range: The XTR111AIDGQR supports a wide range of input voltages from 4.75V to 36V, a feature that allows it to adapt to a variety of application scenarios without the need to frequently adjust or change the input voltage range, thus greatly improving the versatility and convenience of the device.
4. Strong anti-interference ability: The module has a strong anti-interference ability, and can operate stably in the complex electromagnetic environment. Whether it is electrical noise or other interference signals, XTR111AIDGQR can be effectively suppressed to ensure the stability and reliability of the output signal.
5. Built-in current sampling circuit: The module has a built-in current sampling circuit, which can directly measure the current signal without external resistors. This not only simplifies the circuit design and reduces the use of external components, but also improves the accuracy and stability of the measurement.
6. High-precision measurement: The module adopts high-precision op-amps and precision current sampling circuits, which can provide accurate current measurement results. Whether it is a small current change or a large current fluctuation, XTR111AIDGQR can accurately capture and accurately convert to ensure the reliability of the data.
7. Powerful programmability: XTR111AIDGQR has a strong programmability, users can be flexibly configured according to specific needs. Whether it is the input or output range, current output mode or other parameters, it can be programmed to set and adjust to meet the needs of different applications.
The operating principle of the XTR111AIDGQR is primarily based on its design as a precision voltage-to-current converter. The core function of this device is to convert the input voltage signal into the corresponding current signal, or it can also output a voltage signal according to configuration requirements. When working, XTR111AIDGQR first receives the voltage or current signal to be converted through its input terminal (such as VIN or IS). These signals are then processed by precision op amps and current sampling circuits within the device. The high-precision operational amplifier ensures accurate amplification and processing of the input signal, while the precision current sampling circuit can directly measure the current signal without the need for external resistors, thus achieving high-precision current measurement. The XTR111AIDGQR sets the ratio between input voltage and output current through the external resistor RSET connected to the SET pin. This ratio determines how the device converts input signals into output signals, allowing the XTR111AIDGQR to adapt to different application needs and provide flexible signal conversion capabilities.
XTR111AIDGQR is a powerful current loop sensor suitable for various application scenarios that require current measurement. Its main application areas are as follows:
1. Battery management system
With its precise current measurement capabilities, XTR111AIDGQR is able to accurately capture the charging and discharging current in the battery pack in real time. Its wide range of input voltage support enables it to adapt to the working voltages of different battery packs without the need to frequently adjust or change the input voltage range, greatly improving the versatility and convenience of the device.
2. Motor control
The motor driver is the core component of motor control. It is responsible for converting the electrical energy provided by the power supply into the mechanical energy required by the motor. In this process, accurate monitoring of current signals is crucial. XTR111AIDGQR can measure the current signal in the motor driver in real time. Whether it is the current change during starting, running or braking, it can be accurately captured. This allows the control system to understand the working status of the motor in real time, such as load conditions, operating efficiency, and possible faults.
3. Electric energy measurement
By combining XTR111AIDGQR with other sensors or measuring devices, a complete energy measurement and monitoring system can be built. For example, it can cooperate with equipment such as electric energy meters and power factor meters to realize real-time monitoring of key parameters such as energy consumption and power factor in the power system. This helps the power management department understand the operating status of the power system, discover and solve potential problems in a timely manner, and improve the operating efficiency and stability of the power system.
4. Power management
XTR111AIDGQR can be used in the field of power management. Through the monitoring data of XTR111AIDGQR, we can control and manage the power system more accurately. For example, when the power supply current exceeds a set threshold, the control system can automatically adjust the power supply's output to prevent problems such as overloads or short circuits. At the same time, we can also predict the load changes of the power system by analyzing the changing trend of the current, so as to make corresponding adjustments in advance.
5. Industrial automation
XTR111AIDGQR can be used for current monitoring and control in industrial automation equipment. In industrial control systems such as PLC and DCS, this device exhibits excellent current measurement capabilities. As the core control units of industrial automation, PLC and DCS are responsible for receiving sensor signals and accurately controlling the production process. In these systems, current data is a key parameter reflecting the status of the equipment. XTR111AIDGQR can provide accurate current data in real time, helping PLC and DCS to effectively monitor and control automation equipment. Once the equipment current is abnormal, the control system can respond quickly to adjust the equipment status or trigger the protection mechanism to ensure equipment safety and smooth production.
We can take the following measures:
1. Regular inspection and maintenance: We need to regularly inspect and maintain the XTR111AIDGQR, including checking the power supply, grounding, peripheral circuits, etc., to ensure that all parameters are normal. If any abnormality is found, we should deal with it in time to avoid malfunctions.
2. Follow the correct operating procedures: When operating the XTR111AIDGQR, we should follow the correct operating procedures and precautions to avoid malfunctions caused by misoperation or improper use.
3. Suitable working environment: We need to ensure that the XTR111AIDGQR operates within the recommended operating temperature range, which is -40°C to +125°C. In addition, we should avoid using XTR111AIDGQR in harsh environments such as high temperature, high humidity, and high dust to reduce the risk of failure.
4. Use qualified components: When building circuits related to XTR111AIDGQR, we should use qualified components and avoid using inferior or damaged components. In addition, we should also pay attention to the matching and compatibility of components to ensure the stability and reliability of the circuit.
5. Correct power supply and grounding: We provide stable and suitable power supply for XTR111AIDGQR and ensure good grounding. Unstable power supply or poor grounding may cause the chip to work abnormally, leading to malfunction.
6. Input signal protection: We must ensure that the signal input to the XTR111AIDGQR is within the specified range to avoid abnormal inputs such as overvoltage and overcurrent. We can consider adding protection circuits at the input end, such as current-limiting resistors, filter capacitors, etc., to reduce the impact of the input signal on the chip.
Frequently Asked Questions
1. What applications is XTR111AIDGQR commonly used in?
XTR111AIDGQR is commonly used in various industrial and instrumentation applications such as process control, data acquisition systems, and sensor interfacing.
2. What is the replacement and equivalent of XTR111AIDGQR?
You can replace the XTR111AIDGQR with XTR111AIDGQRG4, XTR111AIDGQT or XTR111AIDGQTG4.
3. Does XTR111AIDGQR offer any protection features?
Yes, XTR111AIDGQR typically includes features such as thermal shutdown protection and overcurrent protection to safeguard the device and the connected circuitry from damage due to excessive temperature or current.
