Overview
The LME49990MA/NOPB is a precision operational amplifier from Texas Instruments, designed for high-performance audio applications. This low-noise, low-distortion op-amp features a wide bandwidth and high slew rate, making it suitable for driving audio systems, instrumentation, and other sensitive analog applications. With its unique design, the LME49990MA/NOPB ensures exceptional signal integrity and clarity in audio processing.
Key Specifications
| Parameter | Typical | Limit | Conditions |
|---|---|---|---|
| Input Noise Density (f = 1kHz) | 0.9 nV/√Hz | 1.3 nV/√Hz | - |
| THD+N (AV = 1, VOUT = 3VRMS, fIN = 1kHz) | 0.00001 % | - | RL = 600Ω |
| 1/f Corner Frequency | 43 Hz | - | - |
| Slew Rate | ±22 V/μs | - | - |
| Gain Bandwidth (AV = 104, RL = 2kΩ, f = 90kHz) | 110 MHz | - | - |
| PSRR | 144 dB | 119 dB | - |
| CMRR | 137 dB | 116 dB | - |
| Power Supply Voltage Range | ±5V to ±18V | - | - |
| Quiescent Current (VCC = ±15V) | 9 mA | 11 mA | - |
| Input Offset Voltage (VCC = ±18V) | 130 μV | 300 μV | - |
| Input Bias Current (VCC = ±18V) | 30 nA | 500 nA | - |
Key Features
- Ultra Low Noise: Provides a noise level as low as 0.9 nV/√Hz for superior audio clarity.
- High Slew Rate: Offers a slew rate of up to ±22 V/μs for rapid signal changes.
- Wide Bandwidth: Features a bandwidth of 110 MHz, enabling high-speed signal processing.
- Low Distortion: Achieves low total harmonic distortion (THD+N) of 0.00001% for pristine audio signals.
- Dual Supply Operation: Operates with dual supplies allowing flexibility in circuit design.
- Output Short Circuit Protection: Protects the output from short circuit conditions.
- Easily Drives 600Ω Load: Capable of driving loads up to 600Ω to within 2V of either power supply voltage.
Applications
- Audio Amplification: Ideal for amplifying audio signals in high-fidelity audio systems.
- Instrumentation: Used in precision measurement applications and instrumentation devices.
- Signal Conditioning: Excellent for conditioning weak signals in various analog applications.
- Active Filters: Suitable for use in active filter circuits.
- Preamplifiers: Used in preamplifier stages for high-quality signal amplification.
- Spectrum Analyzers: Used in spectrum analyzer applications requiring high signal integrity.
- Ultrasound Preamplifiers: Suitable for ultrasound preamplification due to its low noise and high slew rate.
- Sigma-Delta ADC/DAC Buffers: Used as buffers in sigma-delta analog-to-digital and digital-to-analog converters.
Q & A
- Q: What is the supply voltage range for the LME49990MA/NOPB?
A: The LME49990MA/NOPB can operate with a dual supply voltage ranging from ±5V to ±18V.
- Q: Can the LME49990MA/NOPB be used in battery-powered applications?
A: Yes, due to its low power consumption characteristics, the LME49990MA/NOPB is suitable for battery-powered designs requiring high-performance audio amplification.
- Q: What is the typical input noise density of the LME49990MA/NOPB?
A: The typical input noise density is 0.9 nV/√Hz at 1 kHz.
- Q: What is the slew rate of the LME49990MA/NOPB?
A: The slew rate is up to ±22 V/μs.
- Q: What is the gain bandwidth product of the LME49990MA/NOPB?
A: The gain bandwidth product is 110 MHz (typical) at AV = 104 and RL = 2kΩ.
- Q: How does the LME49990MA/NOPB perform in terms of THD+N?
A: The LME49990MA/NOPB achieves a THD+N of 0.00001% at AV = 1, VOUT = 3VRMS, and fIN = 1kHz with RL = 600Ω.
- Q: What is the power supply rejection ratio (PSRR) of the LME49990MA/NOPB?
A: The PSRR is typically 144 dB.
- Q: What is the common-mode rejection ratio (CMRR) of the LME49990MA/NOPB?
A: The CMRR is typically 137 dB.
- Q: Can the LME49990MA/NOPB drive a 600Ω load?
A: Yes, the LME49990MA/NOPB can drive a 600Ω load to within 2V of either power supply voltage.
- Q: Is the LME49990MA/NOPB available in different package types?
A: Yes, it is available in an 8-lead narrow body SOIC and VQFN packages.
