Texas Instruments LM4921
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.| Part No. | LM4921 |
|---|---|
| Datasheet | LM4921 Download |
| Manufacturer |  Texas Instruments |
| Description | Low Voltage I2S 16-Bit Stereo DAC |
| Buy | Stock & Price |
FEATURES
1●2 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 (1))
● Unity-Gain Stable Headphone Amplifiers
● Available in the 20-bump DSBGA Package KEY SPECIFICATIONS
● PSRR at 217Hz, A/DVDD = 3V, (See Figure 1): 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 (1)) 2.6V to 5.5V
● Shutdown Current: 1µA (typ) (1) Best operation is achieved by maintaining 3.0V ≤ AVDD ≤ 5.0V and 3.0V ≤ DVDD ≤ 5.0V.
APPLICATIONS
● Mobile Phones● PDAs
● Portable Electronic Devices
DESCRIPTION
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%.
