INA188IDR Detailed explanation of pin function specifications and circuit principle instructions
The model "INA188IDR" belongs to Texas Instruments (TI), which is a renowned American company known for manufacturing a wide range of semiconductor devices. The INA188IDR is a precise, low- Power , Instrumentation amplifier designed to measure small differential signals with a high degree of accuracy.
Package and Pin Function Details
Package Type: The "INA188IDR" is packaged in a SOIC-8 (Small Outline Integrated Circuit) package, which has 8 pins. Pin Count: 8 pins in total.Below is a detailed list of the pin functions for the INA188IDR, arranged in a table format for clarity.
Pin Number Pin Name Pin Function Description 1 V+ (Pin 1) This is the positive supply voltage pin. It powers the amplifier. The voltage should be within the specified range as per the datasheet. 2 REF (Pin 2) Reference input pin. This pin allows the user to apply an external reference voltage to set the output reference point. It's used for offset adjustment. 3 IN- (Pin 3) Negative differential input. This is the negative input of the differential signal being measured by the amplifier. 4 IN+ (Pin 4) Positive differential input. This is the positive input of the differential signal being measured by the amplifier. 5 GND (Pin 5) Ground pin. It is the reference ground for the device. This pin connects to the circuit’s ground plane. 6 OUT (Pin 6) Output pin. This is the output of the amplifier, providing a voltage that corresponds to the differential signal being measured, scaled by the gain. 7 V- (Pin 7) Negative supply voltage pin. Like V+, this pin is connected to the negative voltage rail to power the device. 8 NC (Pin 8) No Connection. This pin is not internally connected to the chip and is typically left floating or connected to ground.Circuit Principle Instructions
The INA188IDR is an Instrumentation Amplifier that is used to amplify small differential signals while rejecting common-mode noise. It uses an internal architecture that includes multiple op-amps to provide precise amplification. The device allows for fine control over the gain by adjusting an external resistor connected to the gain setting pins. This makes it ideal for applications where accurate and low-noise signal amplification is required, such as in medical equipment, sensor interface s, and other precision measurement systems.
Key functional aspects of the circuit are:
Differential Amplification: It amplifies the difference between the IN+ and IN- inputs. High Common-Mode Rejection Ratio (CMRR): The INA188IDR offers excellent rejection of common-mode signals (signals present at both inputs), ensuring accurate measurement even in noisy environments. Low Power Consumption: The device operates with low power requirements, making it suitable for battery-powered applications. Adjustable Gain: The gain can be set by an external resistor, providing flexibility for different applications.FAQ - 20 Common Questions about INA188IDR
What is the input voltage range for the INA188IDR? The input voltage range for the INA188IDR depends on the supply voltages applied to V+ and V-. The differential input voltage range is limited to within the supply voltages. Can I use a single supply voltage with the INA188IDR? Yes, the INA188IDR can operate with a single supply voltage, provided the supply voltage is within the specified range in the datasheet. How can I adjust the gain of the INA188IDR? The gain of the INA188IDR is set using an external resistor between pins 1 (V+) and 2 (REF). The gain can be calculated using the formula provided in the datasheet. What is the output voltage range of the INA188IDR? The output voltage range is determined by the supply voltages applied to V+ and V-. The output is typically within the range of 0 to V+ - 1.5V. What is the common-mode rejection ratio (CMRR) of the INA188IDR? The INA188IDR has a high CMRR, typically around 120 dB, which ensures good rejection of common-mode noise. What is the maximum supply voltage for the INA188IDR? The maximum supply voltage is typically ±18V or 36V (V+ to V-), as specified in the datasheet. Can the INA188IDR be used for precision temperature measurement? Yes, the INA188IDR is suitable for precision temperature measurement when used with appropriate sensors like thermocouples or RTDs. What is the typical input bias current for the INA188IDR? The typical input bias current is in the range of nanoamperes, which ensures minimal error in low-current measurement applications. What is the power consumption of the INA188IDR? The INA188IDR is designed for low power consumption, with typical operating currents in the microampere range. Can the INA188IDR be used with differential thermocouple signals? Yes, the INA188IDR is ideal for amplifying small differential signals, such as those from thermocouples. What is the maximum input voltage for the INA188IDR? The maximum input voltage is specified in the datasheet, but it should not exceed the supply voltage by more than 0.3V. Can the INA188IDR be used in medical instrumentation? Yes, the INA188IDR is suitable for medical instrumentation where precise and low-noise amplification is required. What type of package is the INA188IDR available in? The INA188IDR is available in a SOIC-8 package. What is the response time of the INA188IDR? The response time of the INA188IDR is determined by the application and circuit design but is typically very fast for most applications. What is the temperature range for the INA188IDR? The operating temperature range for the INA188IDR is typically -40°C to +125°C, making it suitable for industrial and automotive applications. What is the accuracy of the INA188IDR? The accuracy of the INA188IDR is high, with low offset voltage and low drift characteristics, which contribute to precise measurements over time. What is the voltage noise density of the INA188IDR? The INA188IDR offers low voltage noise density, making it suitable for applications where low noise is critical. Can the INA188IDR be used with a microcontroller? Yes, the INA188IDR can be interfaced with a microcontroller to read the amplified output voltage. How does the INA188IDR reject common-mode noise? The INA188IDR uses differential amplifiers to reject common-mode signals, ensuring that only the differential signal is amplified. Is the INA188IDR suitable for battery-operated systems? Yes, due to its low power consumption, the INA188IDR is ideal for use in battery-operated systems.I hope this answers your inquiry. If you need further details or clarification, feel free to ask!