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LM4921

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具有 50mW 立体声耳机放大器和音量的 16 位立体声 DAC

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LM4921

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产品详情

Output power (W) 0.05 Analog supply (min) (V) 2.6 Analog supply voltage (max) (V) 5.5 Load (min) (Ω) 32 PSRR (dB) 62 Rating Catalog Operating temperature range (°C) -40 to 85 Headphone channels Stereo Volume control Yes Shutdown current (ISD) (µA) 1 Architecture Class-AB (ground-centered) Iq per channel (typ) (mA) 4.7
Output power (W) 0.05 Analog supply (min) (V) 2.6 Analog supply voltage (max) (V) 5.5 Load (min) (Ω) 32 PSRR (dB) 62 Rating Catalog Operating temperature range (°C) -40 to 85 Headphone channels Stereo Volume control Yes Shutdown current (ISD) (µA) 1 Architecture Class-AB (ground-centered) Iq per channel (typ) (mA) 4.7
DSBGA (YZR) 20 6.1875 mm² 2.75 x 2.25
  • 16-Bit Resolution Stereo DAC
  • I2S Digital Audio Data Serial Interface
  • SPI Serial Interface (Control Register)
  • Volume Control (32 steps; 1.5 dB Increments)
  • Up to 50mW/Channel Stereo Headphone Amplifier
  • Zero Crossing Detection for Silent Attenuation Steps
  • 2.6VDC to 5.0VDC Digital Supply Voltage Range
  • 2.6VDC to 5.5VDC Analog Supply Voltage Range (See )
  • Unity-Gain Stable Headphone Amplifiers
  • Available in the 20-bump DSBGA Package

Key Specifications

  • PSRR at 217Hz, A/DVDD = 3V: 52dB (typ)
  • POUT at AVDD = 3.0V, 32Ω
    • < 0.05% THD: 13mW (typ)
    • < 0.05% THD: 26mW (typ)
  • Supply Voltage Range
    • DVDD: 2,6V to 5.0V
    • AVDD: (See ) 2.6V to 5.5V
  • Shutdown Current: 1µA (typ)

All trademarks are the property of their respective owners.

  • 16-Bit Resolution Stereo DAC
  • I2S Digital Audio Data Serial Interface
  • SPI Serial Interface (Control Register)
  • Volume Control (32 steps; 1.5 dB Increments)
  • Up to 50mW/Channel Stereo Headphone Amplifier
  • Zero Crossing Detection for Silent Attenuation Steps
  • 2.6VDC to 5.0VDC Digital Supply Voltage Range
  • 2.6VDC to 5.5VDC Analog Supply Voltage Range (See )
  • Unity-Gain Stable Headphone Amplifiers
  • Available in the 20-bump DSBGA Package

Key Specifications

  • PSRR at 217Hz, A/DVDD = 3V: 52dB (typ)
  • POUT at AVDD = 3.0V, 32Ω
    • < 0.05% THD: 13mW (typ)
    • < 0.05% THD: 26mW (typ)
  • Supply Voltage Range
    • DVDD: 2,6V to 5.0V
    • AVDD: (See ) 2.6V to 5.5V
  • Shutdown Current: 1µA (typ)

All trademarks are the property of their respective owners.

The LM4921 combines a 16-bit resolution stereo I2S input digital-to-analog converter (DAC) with a stereo headphone audio power amplifier. It is primarily designed for demanding applications in mobile phones and other portable communication device applications. The LM4921 features an I2S serial interface for the digital audio information and a 16-bit SPI serial interface for internal register control and communication. With AVDD and DVDD = 3.0VDC and driving a 32Ω single-ended load to a 26mWRMS output level the distortion (THD+N) of the LM4921 will be less than 0.5%. The LM4921 also features a programmable 32-step digital volume control accessed through an SPI interface.

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 is a primary requirement.

The LM4921 features a low-power consumption shutdown mode, and also has an internal thermal shutdown protection mechanism.

The LM4921 combines a 16-bit resolution stereo I2S input digital-to-analog converter (DAC) with a stereo headphone audio power amplifier. It is primarily designed for demanding applications in mobile phones and other portable communication device applications. The LM4921 features an I2S serial interface for the digital audio information and a 16-bit SPI serial interface for internal register control and communication. With AVDD and DVDD = 3.0VDC and driving a 32Ω single-ended load to a 26mWRMS output level the distortion (THD+N) of the LM4921 will be less than 0.5%. The LM4921 also features a programmable 32-step digital volume control accessed through an SPI interface.

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 is a primary requirement.

The LM4921 features a low-power consumption shutdown mode, and also has an internal thermal shutdown protection mechanism.
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* 数据表 Low Voltage I 2 S 16-Bit Stereo DAC w/Stereo HP Pwr Amp & Vol Cntrl 数据表 (Rev. E) 2013年 5月 1日

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