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LM49120

ACTIVE

1.3-W, stereo, analog input Class-AB audio amplifier with I2C interface

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Data sheet

LM49120

ACTIVE
Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -40 to 85
Rating Catalog Operating temperature range (°C) -40 to 85
DSBGA (YZR) 16 5.0625 mm² 2.25 x 2.25
  • RF Immunity
  • Selectable OCL/SE Headphone Drivers
  • 32 Step Volume Control
  • Click and Pop Suppression
  • Independent Speaker and Headphone Gain Settings
  • Minimum External Components
  • Thermal Over Load Protection
  • Micro-power Shutdown
  • Space Saving 16–bump DSBGA Package
  • Thermal Shutdown Protection
  • Micro-power Shutdown
  • I2C Control Interface

Key Specifications

  • Output Power at VDD = 5V:
    • Speaker: RL = 8Ω BTL, THD+N ≤ 1%: 1.3W (typ)
    • Headphone: RL = 32Ω, SE, THD+N ≤ 1%: 85mW (typ)
  • Output Power at VDD = 3.6V:
    • Speaker: RL = 8Ω, BTL, THD+N ≤ 1%: 632mW (typ)
  • Output Power at VDD = 3.3V:
    • Speaker: RL = 8Ω, BTL, THD+N ≤ 1%: 540mW (typ)
    • Headphone: RL = 32Ω, OCL/SE, THD+N ≤ 1%: 35mW (typ)

All trademarks are the property of their respective owners.

  • RF Immunity
  • Selectable OCL/SE Headphone Drivers
  • 32 Step Volume Control
  • Click and Pop Suppression
  • Independent Speaker and Headphone Gain Settings
  • Minimum External Components
  • Thermal Over Load Protection
  • Micro-power Shutdown
  • Space Saving 16–bump DSBGA Package
  • Thermal Shutdown Protection
  • Micro-power Shutdown
  • I2C Control Interface

Key Specifications

  • Output Power at VDD = 5V:
    • Speaker: RL = 8Ω BTL, THD+N ≤ 1%: 1.3W (typ)
    • Headphone: RL = 32Ω, SE, THD+N ≤ 1%: 85mW (typ)
  • Output Power at VDD = 3.6V:
    • Speaker: RL = 8Ω, BTL, THD+N ≤ 1%: 632mW (typ)
  • Output Power at VDD = 3.3V:
    • Speaker: RL = 8Ω, BTL, THD+N ≤ 1%: 540mW (typ)
    • Headphone: RL = 32Ω, OCL/SE, THD+N ≤ 1%: 35mW (typ)

All trademarks are the property of their respective owners.

The LM49120 is a compact audio subsystem designed for portable handheld applications such as cellular phones. The LM49120 combines a mono 1.3W speaker amplifier, stereo 85mW/ch output capacitorless headphone amplifier, 32 step volume control, and an input mixer/multiplexer into a single 16–bump DSBGA package.

The LM49120 has three input channels: two single-ended stereo inputs and a differential mono input. Each input features a 32-step digital volume control. The headphone output stage features an 8 step (-18dB – 0dB) attenuator, while the speaker output stage has two selectable (0dB/+6dB) gain settings. The digital volume control and mode control are programmed through a two-wire I2C compatible interface.

The LM49120 is a compact audio subsystem designed for portable handheld applications such as cellular phones. The LM49120 combines a mono 1.3W speaker amplifier, stereo 85mW/ch output capacitorless headphone amplifier, 32 step volume control, and an input mixer/multiplexer into a single 16–bump DSBGA package.

The LM49120 has three input channels: two single-ended stereo inputs and a differential mono input. Each input features a 32-step digital volume control. The headphone output stage features an 8 step (-18dB – 0dB) attenuator, while the speaker output stage has two selectable (0dB/+6dB) gain settings. The digital volume control and mode control are programmed through a two-wire I2C compatible interface.
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* Data sheet Audio Subsystem with Mono Class AB Loudspeaker Amp & Stereo OCL/SE Headphone Amp datasheet (Rev. C) 01 May 2013

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