Overview
The LME49600TS/NOPB, produced by Texas Instruments, is a high-performance, high-fidelity, high-current audio buffer. This component is designed to serve a wide range of audio applications, particularly where low distortion and high output current are critical. It is optimized for use in the feedback loop of operational amplifiers, such as the LME49710, LME49720, or LME49740, to enhance the overall performance of audio systems.
Key Specifications
| Parameter | Typical Value | Conditions |
|---|---|---|
| Supply Voltage Range | ±2.25V to ±18V | |
| Output Current | 250mA | |
| Slew Rate | 2000V/μs | |
| Bandwidth (BW Pin Floating) | 110MHz | |
| Bandwidth (BW Pin Connected to VEE) | 180MHz | |
| Total Harmonic Distortion + Noise (THD+N) | 0.00003% (at 1kHz, VOUT = 3VRMS, RL = 32Ω) | |
| Quiescent Current (BW Pin No Connect) | 7.3mA | |
| Quiescent Current (BW Pin Connected to VEE) | 13.2mA | |
| Operating Temperature Range | -40°C to 85°C | |
| Package Type | TO–263 Surface-Mount Package |
Key Features
- Pin-Selectable Bandwidth: Allows for easy adjustment of bandwidth by either leaving the BW pin unconnected or connecting a resistor between the BW pin and the VEE pin.
- High Fidelity and Low Distortion: Offers very low THD+N, making it suitable for high-performance audio applications.
- High Output Current: Capable of delivering up to 250mA, making it ideal for driving high-current loads such as headphones.
- Thermal Shutdown and Short Circuit Protection: Provides internal protection mechanisms to ensure device reliability and safety.
- Wide Supply Voltage Range: Operates over a supply voltage range of ±2.25V to ±18V.
- High Slew Rate: Features a nominal slew rate of 2000V/μs.
Applications
- Headphone Amplifier Output Drive Stage: Ideal for high-performance headphone amplifiers due to its high output current and low distortion.
- Line Drivers: Suitable for driving audio signals over long cables with minimal loss of fidelity.
- Low Power Audio Amplifiers: Can be used in low power audio amplifiers where high fidelity is required.
- High-Current Operational Amplifier Output Stage: Enhances the output capabilities of operational amplifiers in high-current applications.
- ATE Pin Driver Buffer: Used in automated test equipment for precise signal buffering.
- Power Supply Regulator: Can be used in power supply regulator circuits to improve stability and performance.
Q & A
- What is the typical output current of the LME49600?
The LME49600 can deliver up to 250mA of output current.
- How can the bandwidth of the LME49600 be adjusted?
The bandwidth can be adjusted by either leaving the BW pin unconnected or connecting a resistor between the BW pin and the VEE pin.
- What is the typical THD+N of the LME49600 at 1kHz?
The typical THD+N at 1kHz is 0.00003% when VOUT = 3VRMS and RL = 32Ω.
- What is the operating temperature range of the LME49600?
The operating temperature range is -40°C to 85°C.
- What type of package does the LME49600 come in?
The LME49600 comes in a TO–263 surface-mount package.
- Does the LME49600 have built-in protection mechanisms?
Yes, it has internal current limit and thermal shutdown protection mechanisms.
- What is the slew rate of the LME49600?
The nominal slew rate is 2000V/μs.
- What are some common applications of the LME49600?
Common applications include headphone amplifier output drive stages, line drivers, low power audio amplifiers, and high-current operational amplifier output stages.
- How does the quiescent current change based on the BW pin configuration?
The quiescent current is 7.3mA when the BW pin is not connected and 13.2mA when the BW pin is connected to the VEE pin.
- What is the supply voltage range for the LME49600?
The supply voltage range is ±2.25V to ±18V.
