 |
поискавой системы для электроныых деталей |
|
|
поискавой системы для электроныых деталей |
|
LM4922 датащи(PDF) 1 Page - National Semiconductor (TI) |
|
|
|
|||||||||||||||||||||||||||||
LM4922 датащи(HTML) 1 Page - National Semiconductor (TI) |
|
|
1 / 21 page  LM4922 Ground-Referenced, Ultra Low Noise, Fixed Gain, 80mW Stereo Headphone Amplifier General Description The LM4922 is a ground referenced, fixed-gain audio power amplifier capable of delivering 80mW of continuous average power into a 16 Ω single-ended load with less than 1% THD+N from a 3V power supply. The LM4922 features a new circuit technology that utilizes a charge pump to generate a negative reference voltage. This allows the outputs to be biased about ground, thereby elimi- nating output-coupling capacitors typically used with normal single-ended loads. The LM4922 features an Automatic Standby Mode circuitry (patent pending). In the absence of an input signal, after approximately 12 seconds, the LM4922 goes into low cur- rent standby mode. The LM4922 recovers into full power operating mode immediately after a signal is applied to either the left or right input pins. This feature saves power supply current in battery operated applications. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4922 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage appli- cations where minimal power consumption is a primary re- quirement. The LM4922 features a low-power consumption shutdown mode selectable for either channel separately. This is ac- complished by driving either the SD_RC (Shutdown Right Channel) or SD_LC (Shutdown Left Channel) (or both) pins with logic low, depending on which channel is desired shut- down. Additionally, the LM4922 features an internal thermal shutdown protection mechanism. The LM4922 contains advanced pop & click circuitry that eliminates noises which would otherwise occur during turn-on and turn-off transitions. The LM4922 has an internal fixed gain of 1.5V/V. Key Specifications j Improved PSRR at 217Hz 70dB (typ) j Power Output at VDD = 3V, R L =16 Ω, THD % 1% 80mW (typ) j Shutdown Current 0.01µA (typ) j Internal Fixed Gain 1.5V/V (typ) j Operating Voltage 1.6V to 4.2V Features n Fixed Logic Levels n Ground referenced outputs n High PSRR n Available in space-saving micro SMD package n Ultra low current shutdown mode n Improved pop & click circuitry eliminates noises during turn-on and turn-off transitions n No output coupling capacitors, snubber networks, bootstrap capacitors, or gain-setting resistors required n Shutdown either channel independently Applications n Notebook PCs n Mobile Phone n PDAs n Portable electronic devices n MP3 Players Boomer® is a registered trademark of National Semiconductor Corporation. December 2005 © 2005 National Semiconductor Corporation DS201582 www.national.com |
Аналогичный номер детали - LM4922 |
|
Аналогичное описание - LM4922 |
|
|
|
ссылки URL |
| Вашему бизинису помогли Аллдатащит? [ DONATE ] |
Что такое Аллдатащит | реклама | контакт | Конфиденциальность | Ссылка на техническое описание | обмен ссыками | поиск по производителю 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 |
Russian ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
