The OPA2188AIDR is a precision operational amplifier (op-amp) from Texas Instruments. This device is widely used for applications where low offset voltage, low drift, and high precision are essential. It is a dual op-amp (i.e., two amplifiers in one package) with a single-supply or dual-supply configuration, making it highly versatile for various circuit designs.
Package and Pin Configuration:
Package Type: The OPA2188AIDR is typically available in a SOT-23-5 package (5 pins), and the “D” suffix denotes that it comes in a surface-mount form. Number of Pins: 5 pins (in the case of the SOT-23-5 package).Here’s a detailed explanation of the pin functions for the OPA2188AIDR in the SOT-23-5 package:
Pin Number Pin Name Pin Function Description Pin 1 V+ ( Power Supply) This pin connects to the positive voltage supply. It powers the op-amp. Pin 2 IN- (Inverting Input) This is the inverting input terminal of the op-amp. The voltage at this pin is inverted in relation to the non-inverting input. Pin 3 OUT (Output) This is the output terminal of the op-amp. The amplified signal appears here. Pin 4 IN+ (Non-Inverting Input) This is the non-inverting input terminal of the op-amp. The voltage at this pin is amplified without inversion. Pin 5 V- (Ground or Negative Supply) This pin connects to the negative voltage supply or ground in single-supply configurations.Circuit Principles and Use:
Single-supply operation: The OPA2188AIDR can be operated with a single supply (from a positive voltage to ground) or with dual supplies (positive and negative). Low offset voltage: The OPA2188AIDR features a very low input offset voltage (25 µV max), making it ideal for high-precision applications. Low drift: The device has low drift characteristics, with the offset voltage drift being as low as 0.02 µV/°C, ensuring stable performance over temperature changes. High Common-Mode Rejection Ratio (CMRR): The OPA2188AIDR provides excellent rejection of common-mode signals, enhancing its performance in differential signal applications.20 Common FAQs for OPA2188AIDR:
Q: What is the power supply voltage range for the OPA2188AIDR? A: The OPA2188AIDR can operate within a supply range of 2.7V to 40V (single supply) or ±1.35V to ±20V (dual supply).
Q: Can the OPA2188AIDR be used in a single-supply configuration? A: Yes, the OPA2188AIDR can operate in a single-supply configuration, where the V+ pin is connected to the positive supply and the V- pin is connected to ground.
Q: What is the quiescent current of the OPA2188AIDR? A: The quiescent current (no load) of the OPA2188AIDR is typically 45 µA per amplifier.
Q: What is the maximum output voltage swing of the OPA2188AIDR? A: The output voltage swing is typically from (V-) + 0.1V to (V+) - 0.1V, depending on the load resistance.
Q: How do I calculate the gain for the OPA2188AIDR in a non-inverting amplifier configuration? A: The gain of a non-inverting amplifier is given by the formula: Gain = 1 + (R2/R1), where R1 is the resistor between the inverting input and ground, and R2 is the feedback resistor from the output to the inverting input.
Q: What is the input impedance of the OPA2188AIDR? A: The input impedance is typically 10^12 Ω, which is very high, making the op-amp ideal for high-impedance signal sources.
Q: What are the input offset voltage and its typical value? A: The input offset voltage is typically 25 µV and is highly stable over time and temperature, making the OPA2188AIDR suitable for precise applications.
Q: Is the OPA2188AIDR suitable for low-noise applications? A: Yes, the OPA2188AIDR has low noise characteristics with a typical voltage noise density of 2.5 nV/√Hz at 1 kHz, making it ideal for low-noise signal processing.
Q: Can I use the OPA2188AIDR in instrumentation amplifiers? A: Yes, the OPA2188AIDR can be used in instrumentation amplifier configurations due to its precision and low drift.
Q: What is the output impedance of the OPA2188AIDR? A: The output impedance is typically 1.5 Ω for the OPA2188AIDR, which ensures good drive capabilities for moderate loads.
Q: How does the OPA2188AIDR perform in high-temperature environments? A: The OPA2188AIDR has excellent thermal stability with an input offset voltage drift of 0.02 µV/°C, ensuring reliable operation in a wide temperature range.
Q: What is the typical CMRR of the OPA2188AIDR? A: The Common-Mode Rejection Ratio (CMRR) is typically 130 dB at 1 kHz, ensuring excellent rejection of common-mode noise.
Q: What is the slew rate of the OPA2188AIDR? A: The typical slew rate is 0.03 V/µs, which is adequate for many low-speed precision applications.
Q: Can the OPA2188AIDR be used in active filter circuits? A: Yes, the OPA2188AIDR is well-suited for active filter applications due to its low noise and high precision.
Q: What is the input bias current of the OPA2188AIDR? A: The typical input bias current is 1 pA, which is very low and ensures minimal loading on the input signal source.
Q: How should I handle the OPA2188AIDR in a circuit to avoid thermal issues? A: Ensure proper heat dissipation by avoiding excessive power dissipation and maintaining good PCB layout practices.
Q: What is the typical voltage offset drift of the OPA2188AIDR? A: The voltage offset drift is typically 0.02 µV/°C, making it highly stable over temperature changes.
Q: What are the recommended load conditions for the OPA2188AIDR? A: The OPA2188AIDR works well with resistive loads, and the recommended load resistance should be above 10 kΩ to avoid loading effects.
Q: What is the total harmonic distortion (THD) of the OPA2188AIDR? A: The typical Total Harmonic Distortion (THD) is less than 0.00005%, ensuring minimal distortion in high-precision applications.
Q: Can I use the OPA2188AIDR for voltage reference circuits? A: Yes, due to its low offset voltage and high accuracy, the OPA2188AIDR is ideal for use in voltage reference applications.
This summary should cover all the essential aspects of the OPA2188AIDR op-amp, providing both pin-by-pin details and addressing some of the most common FAQs about this part.