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| LM4857 - Stereo 1.2W Audio Sub-system with 3D Enhancement |
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| Datasheet | Packaging | Samples & Pricing | Reliability | Application Notes | Knowledge Base |
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Features
General Description The LM4857 is an integrated audio sub-system designed for stereo cell phone applications. More... Applications
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Typical Application
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Additional Resources Application Notes (see below)
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RoHS Compliance Information
| Size in Kbytes | Date | |||
| LM4857 Boomer ® Audio Power Amplifier Series Stereo 1.2W Audio Sub-system with 3D Enhancement | 1814 Kbytes | 8-Jun-05 | View Online | Download | Receive via Email |
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If you have trouble printing or viewing PDF file(s), see Printing Problems. |
| Part Number | Package | Factory Lead Time | Models | Samples & Electronic Orders | Budgetary Pricing | Std Pack Size | Package Marking Format | ||||||||
| Type | Pins | Spec. | MSL Rating | Peak Reflow | RoHS Report | CAD Symbols | Weeks | Qty | Qty | $US each | |||||
| LM4857SP | LLP | 28 | NOPB | 1 | 260 | RoHS | Download | Full production | N/A | | 1K+ | $2.15 | reel of 1000 | NS UZXYTT L4857SP | |
| 12 weeks | 1000 | ||||||||||||||
| LM4857SPX | LLP | 28 | NOPB | 1 | 260 | RoHS | Download | Lifetime buy | N/A | 1K+ | $2.15 | reel of 4500 | NS UZXYTT L4857SP | ||
| 12 weeks | N/A | ||||||||||||||
| LM4857ITL | MICRO SMD | 30 | NOPB | 1 | 260 | RoHS | Download | Full production | N/A | | 1K+ | $2.20 | reel of 250 | XVG I C2 | |
| 8 weeks | 500 | ||||||||||||||
| LM4857ITLX | MICRO SMD | 30 | NOPB | 1 | 260 | RoHS | Download | Full production | N/A | 1K+ | $2.20 | reel of 3000 | XVG I C2 | ||
| 6 weeks | 150000 | ||||||||||||||
| Obsolete Part | Alternate Part or Supplier | Source | Last Time Buy Date |
| LM4857GRBD | LM4857ITLBD | NATIONAL SEMICONDUCTOR CORP | 11/16/2008 |
| LM4857SPX | LM4857ITLX | NATIONAL SEMICONDUCTOR CORP | 11/16/2008 |
The LM4857 is an integrated audio sub-system designed for stereo cell phone applications. Operating on a 3.3V supply, it combines a stereo speaker amplifier delivering 495mW per channel into an 8
load, a stereo headphone amplifier delivering 33mW per channel into a 32
load, a mono earpiece amplifier delivering 43mW into a 32
load, and a line output for an external powered handsfree speaker. It integrates the audio amplifiers, volume control, mixer, power management control, and National 3D enhancement all into a single package. In addition, the LM4857 routes and mixes the stereo and mono inputs into 16 distinct output modes. The LM4857 is controlled through an I2C compatible interface. Other features include an ultra-low current shutdown mode and thermal shutdown protection.
Boomer audio power amplifiers are designed specifically to provide high quality output power with a minimal amount of external components.
The LM4857 is available in a 30-bump ITL package and a 28-lead LLP package.
| Part Number | Process | Early Failure Rate - Rejects | Sample Size (EFR) | PPM * | Rel. Rejects | Device Hours | Long Term Failure Rates (FITS) | MTTF |
| LM4857ITL | CS065 | 0 | 16225 | 0 | 0 | 1480000 | 3 | 419954041 |
| LM4857ITLX | CS065 | 0 | 16225 | 0 | 0 | 1480000 | 3 | 419954041 |
| LM4857SP | CS065 | 0 | 16225 | 0 | 0 | 1480000 | 3 | 419954041 |
| LM4857SPX | CS065 | 0 | 16225 | 0 | 0 | 1480000 | 3 | 419954041 |
| Title | Size in Kbytes | Date | |||
| AN-1076: Application Note 1076 Using the COP8ACC with Integration "A/D" Application Considerations | 115 Kbytes | 26-Jun-97 | View Online | Download | Receive via Email |
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If you have trouble printing or viewing PDF file(s), see Printing Problems. |
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