LM49370RL/NOPB
ObsoleteBOOMER AUD PWR AMP & SUB-SYS W/ AN ULTRA LOW EMI SPRD SPECTRUM CLASS D LOUDSPKR AMP
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LM49370RL/NOPB
ObsoleteBOOMER AUD PWR AMP & SUB-SYS W/ AN ULTRA LOW EMI SPRD SPECTRUM CLASS D LOUDSPKR AMP
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Technical Specifications
Parameters and characteristics for this part
| Specification | LM49370RL/NOPB |
|---|---|
| Features | Microphone, Volume Control, 3D, Shutdown, PCM, SPI, Mute, Depop, Standby, I2C, I2S |
| Max Output Power x Channels @ Load | 1.2 W, 52 mW |
| Mounting Type | Surface Mount |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -40 °C |
| Output Type | 1-Channel (Mono) with Mono and Stereo Headphones |
| Package / Case | 49-WFBGA, DSBGA |
| Supplier Device Package | 49-DSBGA |
| Type | Class D |
| Voltage - Supply [Max] | 5.5 V |
| Voltage - Supply [Min] | 2.5 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Texas Instruments | SMALL T&R | 1 | $ 4.64 | |
| 100 | $ 4.06 | |||
| 250 | $ 2.85 | |||
| 1000 | $ 2.29 | |||
Description
General part information
LM49370 Series
The LM49370 is an integrated audio subsystem that supports both analog and digital audio functions. The LM49370 includes a high quality stereo DAC, a mono ADC, a stereo headphone amplifier, which supports output cap-less (OCL) or AC-coupled (SE) modes of operation, a mono earpiece amplifier, and an ultra-low EMI spread spectrum Class D loudspeaker amplifier. It is designed for demanding applications in mobile phones and other portable devices.
The LM49370 features a bi-directional I2S interface and a bi-directional PCM interface for full range audio on either interface. The LM49370 utilizes an I2C or SPI compatible interface for control. The stereo DAC path features an SNR of 85 dB with an 18-bit 48 kHz input. In SE mode the headphone amplifier delivers at least 33 mWRMSto a 32Ω single-ended stereo load with less than 1% distortion (THD+N) when A_VDD= 3.3V. The mono earpiece amplifier delivers at least 115mWRMSto a 32Ω bridged-tied load with less than 1% distortion (THD+N) when A_VDD= 3.3V. The mono speaker amplifier delivers up to 490mW into an 8Ω load with less than 1% distortion when LS_VDD= 3.3V and up to 1.2W whenLS_VDD= 5.0V.
The LM49370 employs advanced techniques to reduce power consumption, to reduce controller overhead, to speed development time, and to eliminate click and pop. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. It is therefore ideally suited for mobile phone and other low voltage applications where minimal power consumption, PCB area and cost are primary requirements.
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Technical documentation and resources