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Details, datasheet, quote on part number:LM4911LD
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| Part: | LM4911LD |
| Category: | Multimedia => Audio => Amplifiers => Preamplifiers => Headphone Amplifiers |
| Description: | LM4911 - LM4911 Stereo 40mW Low Noise Headphone Amplifier With Selectable Capacitive Coupled or Ocl Output, Package: Llp, Pin Nb=10 |
| Company: | National Semiconductor Corporation |
| Datasheet: | Download LM4911LD datasheet File size : 1082 kB |
| Request For quote: | Find where to buy LM4911LD
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Datasheet text preview:
LM4911 Stereo 40mW Low Noise Headphone Amplifier with Selectable Capacitive Coupled or OCL Output
February 2003
LM4911 Stereo 40mW Low Noise Headphone Amplifier with Selectable Capacitive Coupled or OCL Output
General Description
The LM4911 is an stereo audio power amplifier capable of delivering 40mW per channel of continuous average power into a 16 load or 25mW per channel into a 32 load at 1% THD+N from a 3V power supply. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. Since the LM4911 does not require bootstrap capacitors or snubber networks, it is optimally suited for low-power portable systems. In addition, the LM4911 may be configured for either single-ended capacitively coupled outputs or for OCL outputs (patent pending). The LM4911 features a low-power consumption shutdown mode and a power mute mode that allows for faster turn on time with less than 1mV voltage change at outputs on release. Additionally, the LM4911 features an internal thermal shutdown protection mechanism. The LM4911 is unity gain stable and may be configured with external gain-setting resistors.
Key Specifications
n PSRR at 217Hz and 1kHz 65dB (typ) n Output Power at 1kHz with VDD = 2.4V, 1% THD+N into a 16 load 25mW (typ) n Output Power at 1kHz with VDD = 3V, 1% THD+N into a 16 load 40mW (typ) n Shutdown Current 2.0µA (max) n Output Voltage change on release from Shutdown VDD = 2.4V, RL = 16 (C-Coupled) 1mV (max) n Mute Current 100µA (max)
Features
OCL or capacitively coupled outputs (patent pending) External gain-setting capability Available in space-saving MSOP and LD packages Ultra low current shutdown mode Mute mode allows fast turn-on (1ms) with less than 1mV change on outputs n 2V - 5.5V operation n Ultra low noise n n n n n
Applications
n Portable CD players n PDAs n Portable electronics devices
Block Diagram
20031478
FIGURE 1. Block Diagram
Boomer ® is a registered trademark of National Semiconductor Corporation.
© 2003 National Semiconductor Corporation
DS200314
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LM4911
Typical Application
20031480
FIGURE 2. Typical Capacitive Coupled Output Configuration Circuit
20031481
FIGURE 3. Typical OCL Output Configuration Circuit
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LM4911
Connection Diagrams
MSOP Package
20031479
Top View Order Number LM4911MM See NS Package Number MUB10A MSOP Marking
200314A9
Top View G-Boomer Family A3 - LM4911MM LD Package
200314C0
Top View Order Number LM4911LD See NS Package Number LDA10A
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