Overview
The LMV344IPWRG4 is a precision operational amplifier from Texas Instruments, part of the LMV34x series. This device is known for its CMOS inputs, which provide very low input bias current, and its rail-to-rail output swing. The LMV344 is a quad-channel operational amplifier, making it suitable for a variety of applications requiring multiple amplification channels. It operates over a supply voltage range of 2.5 V to 5.5 V, making it versatile for different system requirements.
Key Specifications
| Parameter | Test Conditions | Typical Value | Unit |
|---|---|---|---|
| Input Bias Current | - | 1 pA | pA |
| Input Offset Voltage | - | 0.25 mV | mV |
| Supply Current (per channel) | V+ = 5 V, 25°C | 107 μA | μA |
| Output Short-Circuit Current | Sourcing, V+ = 5 V, 25°C | 85 mA | mA |
| Slew Rate | RL = 10 kΩ, V+ = 5 V, 25°C | 1 V/μs | V/μs |
| Unity-Gain Bandwidth | RL = 10 kΩ, CL = 200 pF, V+ = 5 V, 25°C | 1 MHz | MHz |
| Phase Margin | RL = 100 kΩ, V+ = 5 V, 25°C | 70° | ° |
| Gain Margin | RL = 100 kΩ, V+ = 5 V, 25°C | 20 dB | dB |
| Equivalent Input Noise Voltage | f = 1 kHz, V+ = 5 V, 25°C | 39 nV/√Hz | nV/√Hz |
| Equivalent Input Noise Current | f = 1 kHz, V+ = 5 V, 25°C | 0.001 pA/√Hz | pA/√Hz |
| Total Harmonic Distortion + Noise | f = 1 kHz, AV = 1, RL = 600 Ω, V+ = 5 V, 25°C | 0.012% | % |
Key Features
- Rail-to-Rail Output Swing: The LMV344 provides a full rail-to-rail output swing, allowing the output voltage to reach the supply rails.
- Low Input Bias Current: With a typical input bias current of 1 pA, this amplifier is suitable for applications requiring very low input current.
- Low Supply Current: The device operates with a low supply current of 107 μA per channel at 5 V supply voltage.
- Wide Supply Voltage Range: The LMV344 can operate over a supply voltage range of 2.5 V to 5.5 V.
- High Unity-Gain Bandwidth: It has a unity-gain bandwidth of 1 MHz, making it suitable for various high-frequency applications.
- Shutdown Capability (LMV341): Although not applicable to the LMV344, the LMV341 version of this series includes a shutdown feature that reduces the supply current to nearly zero and sets the output to high impedance.
Applications
- Audio and Video Processing: The LMV344 is suitable for audio and video signal processing due to its low noise and high bandwidth.
- Medical Devices: Its low input bias current and rail-to-rail output make it ideal for medical devices that require precise signal amplification.
- Industrial Control Systems: The device can be used in industrial control systems where multiple channels of amplification are required.
- Portable Electronics: The low supply current and wide supply voltage range make it suitable for battery-powered portable electronics.
- Automotive Systems: It can be used in automotive systems for signal conditioning and amplification.
Q & A
- What is the typical input bias current of the LMV344?
The typical input bias current of the LMV344 is 1 pA.
- What is the supply current per channel for the LMV344 at 5 V supply voltage?
The supply current per channel is typically 107 μA at 5 V supply voltage.
- What is the unity-gain bandwidth of the LMV344?
The unity-gain bandwidth of the LMV344 is 1 MHz.
- Does the LMV344 have a shutdown feature?
No, the LMV344 does not have a shutdown feature. This feature is available in the LMV341 version.
- What is the typical output short-circuit current of the LMV344?
The typical output short-circuit current is 85 mA when sourcing.
- What is the phase margin of the LMV344 at 100 kΩ load resistance?
The phase margin is typically 70° at 100 kΩ load resistance.
- What is the gain margin of the LMV344 at 100 kΩ load resistance?
The gain margin is typically 20 dB at 100 kΩ load resistance.
- What is the equivalent input noise voltage of the LMV344 at 1 kHz frequency?
The equivalent input noise voltage is typically 39 nV/√Hz at 1 kHz frequency.
- What is the total harmonic distortion + noise of the LMV344 at 1 kHz frequency and 600 Ω load resistance?
The total harmonic distortion + noise is typically 0.012% at 1 kHz frequency and 600 Ω load resistance.
- What is the operating temperature range of the LMV344?
The operating temperature range is from -40°C to 125°C.
