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LM4869 数据表(PDF) 1 Page - National Semiconductor (TI) |
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LM4869 数据表(HTML) 1 Page - National Semiconductor (TI) |
1 / 20 page LM4869 1.9W Differential Input, BTL Output Stereo Audio Amplifier with Selectable Gain and Shutdown General Description The LM4869 features differential stereo inputs, BTL (bridge- tied load) outputs, and four externally selectable fixed gains. Operating on a single 5V supply, the LM4869 delivers 1.2W and 1.9W (typ) of output power to an 8 Ω and 4Ω BTL load (Note 1), respectively, with less than 1% THD+N. The LM4869’s gain is selected using two digital inputs. The nomi- nal gain values are 6dB, 10dB, 15.6dB, and 21.6dB. The LM4869 is designed for notebook and other handheld portable applications. It delivers high quality output power from a surface-mount package and requires few external components. Other features include an active-low micropower shutdown mode input and thermal shutdown protection. Key Specifications j BTL output Power R L =4 Ω,V DD = 5.0V, and THD+N = 1% 1.9W (typ) j BTL output Power R L =8 Ω,V DD = 5.0V, and THD+N = 1% 1.2W (typ) j Micropower shutdown current 0.1µA (typ) j PSRR (@ 1kHz, VDD = 5V, (Fig.1)) 62dB (typ) Features n Fully differential input and output n Internal gain set: 6dB, 10dB, 15.6dB, and 21.6dB n Improved ’click and pop’ suppression n Thermal shutdown protection circuit n Ultra low current micropower shutdown mode n 2.0V to 5.5V operation n Available in space-saving exposed-DAP TSSOP package Applications n Notebook computers n PDAs n Portable electronic devices Connection Diagram Top View 20042802 Order Number LM4869MH See NS Package Number MXA20A for Exposed-DAP TSSOP Boomer® is a registered trademark of National Semiconductor Corporation. August 2002 © 2002 National Semiconductor Corporation DS200428 www.national.com |
类似零件编号 - LM4869 |
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类似说明 - LM4869 |
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