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LM4921

Features: 16-bit resolution stereo DACI2S digital audio data serial interfaceSPI serial interface (control register)Volume Control (32 steps; 1.5 dB increments)Up to 50mW/channel stereo headphone amplifierZero Crossing Detection for Silent Attenuation Steps2.6VDC to 5.0VDC digital supply voltage r...

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SeekIC No. : 004395891 Detail

LM4921: Features: 16-bit resolution stereo DACI2S digital audio data serial interfaceSPI serial interface (control register)Volume Control (32 steps; 1.5 dB increments)Up to 50mW/channel stereo headphone am...

LM4921 Data Sheet

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Part Number:
LM4921
Supply Ability:
5000

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  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

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 (Note 8)
Unity-gain stable headphone amplifiers
Available in the 20-bump microSMD package




Application

Mobile phones
PDAs
Portable electronic devices




Specifications

Power@ 32Ohms, 1% THD 0.05 Watt
THD 0.03 %
PSRR 62 dB
SNR 82 dB
Channels 2 Channels
THD Conditions f=1kHz, Pout = 12mW
PSRR Conditions f = 217Hz, Vripple=200mVpp
SNR Conditions f=1kHz
User Supply 3 Volt
Shutdown Type High
Volume Control SPI
Exposed DAP No
Capless Headphone No
Temperature Min -40 deg C
Temperature Max 85 deg C
View Using Catalog


Supply Voltage........................................................... 6.0V
Storage Temperature ............................−65°C to +150°C
Input Voltage..................................... -0.3V to VDD + 0.3V
Power Dissipation (Note 3).................... Internally Limited
ESD Susceptibility
Human body model (Note 4) .................................2000V
Machine model (Note 5).......................................... 200V
Junction Temperature............................................. 150°C
Thermal Resistance
JA ......................................................................60°C/W




Description

The LM4921 combines a 16-bit resolution stereo I 2S 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 I 2S 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.

Reliability Metrics

Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM4921ITL CMOS7 0 16561 0 0 954000 4 270700104
LM4921ITLX CMOS7 0 16561 0 0 954000 4 270700104

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.


Design Tools

Title Size in Kbytes Date
Audio Amplifier Digital Control Interface Evaluation Board Software 16 Kbytes 27-Mar-2008 View

If you have trouble printing or viewing PDF file(s), see Printing Problems.






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