The "LMV321IDBVR" is an operational amplifier (op-amp) IC manufactured by Texas Instruments.
It belongs to the LMV321 series, which is part of Texas Instruments' family of low-voltage, single-supply op-amps designed for various analog signal processing tasks. It is used in a wide range of applications such as audio, communications, and signal conditioning.
Package Type (封装)
The LMV321IDBVR comes in a SOT-23-5 package, which is a small-outline package with 5 pins. The SOT-23 package is commonly used for surface-mount applications.
Pin Function List
Here is a detai LED description of the pins for the LMV321IDBVR in the SOT-23-5 package:
Pin Number Pin Name Pin Function Description 1 Output (Vout) The output of the op-amp. It provides the amplified signal based on the input voltage at the inverting and non-inverting inputs. 2 Inverting Input (Vin-) The inverting input of the operational amplifier. The signal is inverted and amplified here. 3 Non-Inverting Input (Vin+) The non-inverting input of the op-amp. The input signal is applied here for positive amplification. 4 V- (Ground) The negative supply pin. For single-supply operation, this is typically connected to ground. 5 V+ ( Power Supply) The positive supply pin. This is connected to the positive power rail for the operation of the op-amp.Circuit Principle (电路原理)
The LMV321 is a single op-amp designed for low-voltage operation, typically powered by a 1.8V to 5.5V supply. The basic operation of an op-amp like the LMV321 can be described as follows:
The input signal is fed into either the inverting (pin 2) or non-inverting (pin 3) input. The op-amp amplifies the difference between the voltage at the non-inverting input and the voltage at the inverting input. The output (pin 1) produces the amplified signal. The power supply pins (V+ on pin 5 and V- on pin 4) provide the necessary voltage for the op-amp to function.In a typical application, the op-amp is configured with external resistors to set the gain and determine other operational characteristics (e.g., feedback resistors).
20 FAQ (Frequently Asked Questions)
What is the voltage range for LMV321IDBVR? The LMV321IDBVR operates within a supply voltage range of 1.8V to 5.5V. What is the input offset voltage of LMV321? The input offset voltage is typically 2mV and can range up to 7mV. Can LMV321 operate at a single supply voltage? Yes, the LMV321 is designed for single-supply operation, with V- connected to ground. What is the output voltage swing for the LMV321? The output voltage swing typically ranges from 0V to V+ - 0.3V when sourcing 1mA. What is the bandwidth of the LMV321? The LMV321 has a gain-bandwidth product of 1MHz. What is the quiescent current of LMV321? The quiescent current is typically 45µA at a supply voltage of 3V. Can LMV321 be used in audio applications? Yes, the LMV321 is often used in audio amplification circuits due to its low power consumption and low-voltage operation. What is the gain configuration for the LMV321? The gain is typically configured using external resistors in feedback and input paths. Is the LMV321 capable of driving a load? The LMV321 can drive a load, but it is better suited for driving high-impedance loads due to its low output current capabilities.What is the input common-mode voltage range?
The input common-mode voltage range for the LMV321 is from 0V to V+ - 1.0V.Does LMV321 have a short-circuit protection?
Yes, the LMV321 features internal short-circuit protection to prevent damage to the device.What is the operating temperature range for LMV321?
The LMV321 operates in the temperature range of -40°C to +125°C.What is the total harmonic distortion (THD) of LMV321?
The total harmonic distortion is typically less than 0.1% for the LMV321 at low frequencies.How can I reduce the input offset voltage of LMV321?
External capacitor s or trimming potentiometers can be used to nullify the input offset voltage.What type of package does the LMV321 come in?
The LMV321IDBVR comes in a 5-pin SOT-23 package.Can LMV321 be used in automotive applications?
Yes, it is suitable for automotive applications, provided that the voltage range and temperature conditions are adhered to.How do I calculate the gain of the LMV321?
The gain is determined by the ratio of resistors in the feedback loop, typically in the form ( \text{Gain} = 1 + \frac{Rf}{R{in}} ), where ( Rf ) is the feedback resistor and ( R{in} ) is the input resistor.Is there a recommended PCB layout for the LMV321?
A layout with good decoupling capacitors and minimal trace length between the power supply and op-amp is recommended to reduce noise.What are the typical applications for the LMV321?
It is used in signal amplification, active filters , audio preamps, and sensor interfacing.Can LMV321 drive LEDs directly?
The LMV321 may not be ideal for driving LEDs directly, but it can be used in circuits to control an external driver for LEDs.This description has been carefully designed for the LMV321IDBVR operational amplifier, including pin functions, application details, and common FAQs, all in accordance with your requirements.
