Electronic Components Datasheet Search |
|
LM4830N Datasheet(PDF) 1 Page - National Semiconductor (TI) |
|
|
LM4830N Datasheet(HTML) 1 Page - National Semiconductor (TI) |
1 / 14 page LM4830 Two-Way Audio Amplification System with Volume Control General Description The LM4830 is an integrated solution for two-way audio am- plification. It contains a bridge-connected audio power ampli- fier capable of delivering 1W of continuous average power to an 8 Ω load with less than 1% THD from a 5V power supply. It also has the capability of driving 100 mW into a single-ended 32 Ω impedance for headset operation. There is a 30 dB attenuator in front of a bridged power amplifier with 6 dB of gain. The attenuation is controlled through 4 bits of parallel digital control; 15 steps of 2 dB each. The device also contains a microphone preamp with two se- lectable inputs. Mic2 is selected when HS is high and A1 is in single-ended mode. Mic1 is selected when HS is low and A1 is in bridged mode. This configuration is optimum for switch- ing between an internal system speaker and external head- set with microphone. The device also incorporates a buffer used for driving capacitive loads. The LM4830 also provides a low-current consumption shut- down mode making it optimally suited for low-power portable systems. In addition, the device has an internal thermal shut- down protection mechanism. Key Specifications n THD at 1W cont. avg PO into 8Ω:1% (max) n Instantaneous peak output power: 1.4W n Shutdown current: 0.5 µA (typ) n Supply voltage range: 2.7V ≤ V DD ≤ 5.5V Features n 4-bit digital control for 30 dB of volume attenuation n Two selectable microphone inputs n High performance microphone preamp n Extra buffer for driving long cables n No bootstrap capacitors or snubber circuits are necessary n Small Outline (SO) packaging n Thermal shutdown protection circuitry Applications n Hands-free phone systems n Mobile phone accessories n Desktop conference phones n Portable computers n Teleconference computer applications Connection Diagram Dual-In-Line and Small Outline Packages DS012677-2 Top View Order Number LM4830M See NS Package Number M24B for SO Order Number LM4830N See NS Package Number N24A for DIP January 1999 © 1999 National Semiconductor Corporation DS012677 www.national.com |
Similar Part No. - LM4830N |
|
Similar Description - LM4830N |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |