Overview
The LME49743MTX/NOPB is a quad high-performance, high-fidelity audio operational amplifier produced by Texas Instruments. This device is optimized for superior audio signal fidelity and is designed to meet the demands of high-performance audio applications. It combines low voltage noise density, extremely low total harmonic distortion plus noise (THD+N), and high slew rates to deliver outstanding audio performance.
The amplifier is capable of driving challenging loads, including 600Ω loads, with a high output current capability of ±21mA. It features a wide supply voltage range of ±4.0V to ±17V, ensuring excellent operational performance across various supply conditions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Power Supply Voltage Range | ±4.0V to ±17V | V |
| THD+N (AV = 1, VOUT = 3VRMS, fIN = 1kHz, RL = 2kΩ) | 0.0001% | % (typ) |
| THD+N (AV = 1, VOUT = 3VRMS, fIN = 1kHz, RL = 600Ω) | 0.0001% | % (typ) |
| Input Noise Density | 3.5 nV/√Hz | nV/√Hz (typ) |
| Slew Rate | ±12 V/μs | V/μs (typ) |
| Gain Bandwidth Product | 30 MHz | MHz (typ) |
| Open Loop Gain (RL = 600Ω) | 110 dB | dB (typ) |
| Input Bias Current | 190 nA | nA (typ) |
| Input Offset Voltage | ±0.15 mV | mV (typ) |
| PSRR | 98 dB (typ) | dB |
| CMRR | 106 dB (typ) | dB |
Key Features
- Easily drives 600Ω loads.
- Optimized for superior audio signal fidelity.
- Output short circuit protection.
- Low voltage noise density (3.5 nV/√Hz).
- Extremely low THD+N (0.0001%).
- High slew rate (±12 V/μs).
- High CMRR (106 dB) and PSRR (98 dB).
- Wide supply voltage range (±4.0V to ±17V).
- Unity gain stable.
- Available in 14-lead TSSOP package.
Applications
- Audio amplifiers and preamplifiers.
- Professional audio equipment.
- Equalization and crossover networks.
- Line drivers and receivers.
- Active filters.
Q & A
- What is the power supply voltage range of the LME49743?
The power supply voltage range of the LME49743 is ±4.0V to ±17V.
- What is the typical THD+N for the LME49743 when driving a 600Ω load?
The typical THD+N for the LME49743 when driving a 600Ω load is 0.0001%.
- What is the input noise density of the LME49743?
The input noise density of the LME49743 is 3.5 nV/√Hz.
- What is the slew rate of the LME49743?
The slew rate of the LME49743 is ±12 V/μs.
- What is the gain bandwidth product of the LME49743?
The gain bandwidth product of the LME49743 is 30 MHz.
- Is the LME49743 protected against output short circuits?
- What is the typical CMRR and PSRR of the LME49743?
The typical CMRR is 106 dB and the typical PSRR is 98 dB.
- In what package is the LME49743 available?
The LME49743 is available in a 14-lead TSSOP package.
- What are some common applications of the LME49743?
Common applications include audio amplifiers, preamplifiers, professional audio equipment, equalization and crossover networks, line drivers, and active filters.
- Is the LME49743 unity gain stable?
