Description
LM4857SP/NOPB Texas Instruments - Yeehing Electronics
1.2-W, stereo, analog input, Class-AB audio amplifier with 3D enhancement & 16 output modes
Pricing (USD)
| Quantity | Unit Price |
| 1 — 99 | 2.578 |
| 100 — 249 | 2.259 |
| 250 — 999 | 1.584 |
| 1,000 + | 0.89 |
The above prices are for reference only.
Specifications
| Manufacturer | Texas Instruments |
| Product Category | Audio Amplifiers |
| RoHS | Y |
| Series | LM4857 |
| Product | Audio Amplifiers |
| Class | Class-AB |
| Output Power | 135 mW |
| Mounting Style | SMD/SMT |
| Type | Mono, Stereo |
| Package / Case | LLP-28 |
| Audio - Load Impedance | 32 Ohms |
| THD plus Noise | 0.05 % |
| Supply Voltage - Max | 5.5 V |
| Supply Voltage - Min | 2.5 V |
| Minimum Operating Temperature | - 40 C |
| Maximum Operating Temperature | + 85 C |
| Packaging | Reel |
| Description/Function | Earpiece/Headphone/Speaker |
| Height | 0.6 mm |
| Input Type | Single |
| Length | 5 mm |
| Output Type | 1-Channel Mono, 2-Channel Stereo |
| Supply Type | Dual |
| Width | 5 mm |
| Brand | Texas Instruments |
| Supply Current - Max | 21 mA |
| Dual Supply Voltage | 3 V, 5 V |
| Maximum Dual Supply Voltage | 5.5 V |
| Minimum Dual Supply Voltage | 2.5 V, 2.7 V |
| Operating Supply Current | 13 mA |
| Operating Supply Voltage | 2.5 V to 5.5 V |
| Output Signal Type | Differential, Single |
| Product Type | Audio Amplifiers |
| PSRR - Power Supply Rejection Ratio | 86 dB |
| Factory Pack Quantity | 1000 |
| Subcategory | Audio ICs |
| Vos - Input Offset Voltage | 40 mV |
For more information, please refer to datasheet
Documents
| LM4857SP/NOPB Datasheet |
More Information
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 8Ω load, a stereo headphone amplifier delivering 33mW per channel into a 32Ω load, a mono earpiece amplifier delivering 43mW into a 32Ω load, and a line output for an external powered handsfree speaker. It integrates the audio amplifiers, volume control, mixer, power management control, and TI 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.
