Overview
The LMV324MT, produced by National Semiconductor (now part of Texas Instruments), is a quad general-purpose, low-voltage, rail-to-rail output operational amplifier. This device is part of the LMV321/358/324 family, which offers cost-effective solutions for applications requiring low voltage operation, space savings, and low cost. The LMV324MT operates within a voltage range of 2.7V to 5.5V, making it suitable for battery-powered systems and other low-voltage applications.
These amplifiers are built using National’s advanced submicron silicon-gate BiCMOS process, ensuring excellent speed-power ratio, low supply current, and high output current drive. They are particularly useful in designs where space is limited and signal integrity is crucial.
Key Specifications
| Parameter | Typical Value | Unit |
|---|---|---|
| Supply Voltage Range | 2.7 to 5.5 | V |
| Operating Temperature Range | −40 to +85 | °C |
| Unity-Gain Bandwidth | 1 | MHz |
| Slew Rate | 1 | V/μs |
| Supply Current (Typical) | 410 | μA |
| Rail-to-Rail Output Swing @ 10kΩ | V+ −10mV, V− +65mV | V |
| Input Common-Mode Voltage Range | −0.2V to V+ − 0.8V | V |
| ESD Protection | 2000V Human Body Model, 1000V Charged-Device Model | V |
Key Features
- No Crossover Distortion: The LMV324MT eliminates output crossover distortion, ensuring cleaner output signals.
- Rail-to-Rail Output Swing: Provides maximum possible dynamic range at the output, particularly important in low supply voltage applications.
- Low Supply Current: Helps maximize battery life in portable and battery-powered systems.
- Space Saving Package: Available in small packages like SC70-5, which is approximately half the size of SOT23-5, saving space on PCBs and enabling the design of smaller electronic products.
- Input Includes Ground: Allows direct sensing near ground in single supply operation.
- ESD Protection: Exceeds JESD 22 standards with 2000V human-body model and 1000V charged-device model.
- Bipolar Input and Output Stages: Improves noise performance and provides higher output current drive.
Applications
- Active Filters: Suitable for designing active filters due to their stability and performance characteristics.
- General Purpose Low Voltage Applications: Ideal for applications requiring low voltage operation and space savings.
- Portable Devices: Used in cellular phones, pagers, and other portable electronic systems.
- Desktop PCs and Notebooks: Can be used in various computer peripherals and systems.
- Motor Control and HVAC Systems: Applied in heating, ventilating, and air conditioning systems, as well as motor control circuits.
- Professional Audio Mixers and Consumer Electronics: Used in professional audio equipment and various consumer electronic devices like refrigerators and washing machines.
Q & A
- What is the operating voltage range of the LMV324MT?
The LMV324MT operates within a voltage range of 2.7V to 5.5V.
- What is the typical supply current for the LMV324MT?
The typical supply current for the LMV324MT is 410 μA.
- Does the LMV324MT have rail-to-rail output swing capability?
- What is the unity-gain bandwidth of the LMV324MT?
The unity-gain bandwidth of the LMV324MT is 1 MHz.
- Is the LMV324MT protected against ESD?
- Can the LMV324MT drive capacitive loads directly?
The LMV324MT can directly drive up to 200 pF in unity-gain without oscillation.
- What are the typical applications of the LMV324MT?
The LMV324MT is used in active filters, general-purpose low-voltage applications, portable devices, desktop PCs, notebooks, motor control, HVAC systems, professional audio mixers, and various consumer electronics.
- How does the small package size of the LMV324MT benefit design?
The small package size saves space on PCBs, enables the design of smaller electronic products, and allows placement closer to the signal source to reduce noise pickup and increase signal integrity.
- Does the LMV324MT eliminate crossover distortion?
- What is the input common-mode voltage range of the LMV324MT?
The input common-mode voltage range of the LMV324MT is from −0.2V to V+ − 0.8V.
