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PDF NAU88C14 Data sheet ( Hoja de datos )
| Número de pieza | NAU88C14 | |
| Descripción | Mono Audio Codec | |
| Fabricantes | nuvoton | |
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NAU88C14
1. GENERAL DESCRIPTION
Mono Audio Codec with Speaker Driver and Equalizer
emPowerAudio™
NAU88C14 is a cost effective and low power wideband MONO audio CODEC. It is designed for voice telephony
related applications. Functions include 5-band Graphic Equalizer, Automatic Level Control (ALC) with noise gate,
PGA, standard audio interface I2S, PCM with time slot assignment, and on-chip PLL. The device provides one
differential microphone input and one single ended auxiliary input (multi purpose). There are few variable gain
control stages in the audio path. It also includes MONO line output and integrated BTL speaker driver.
The analog inputs have PGA on the front end, allowing dynamic range optimization with a wide range of input
sources. The microphone amplifiers have a programmable gain from -12dB to +35.25dB to handle both amplified
microphones. In addition to a digital high pass filter to remove DC offset voltages, the ADC also features voice
band digital filtering. Voice band data is accepted by the audio interface (I2S). The DAC converter path includes
filtering and mixing, programmable-gain amplifiers (PGA), and soft muting. The digital interfaces, 2-Wire or SPI,
have independent supply voltage to allow integration into multiple supply systems. NAU88C14 operates at supply
voltages from 2.5V to 3.6V, although the digital core can operate at voltage as low as 1.71V to save power.
The NAU88C14 is specified for operation from -40°C to +85°C.
2. FEATURES
24-bit signal processing linear Audio CODEC
Audio DAC: 93dB SNR and -84dB THD
Audio ADC: 91dB SNR and -79dB THD
Support variable sample rates from 2.5 - 48kHz
Integrated BTL Speaker Driver 1 W (8Ω / 5V)
Integrated Headset Driver 40mW (16Ω / 3.3V)
Analog I/O
Integrated programmable Microphone Amplifier
Integrated Line Input and Line Output
Earphone / Speaker / Line Output selection
Microphone / Line Inputs selection
Low Noise bias supplied for microphone
On-chip PLL
Interfaces
I2S digital interface PCM time slot assignment
SPI & 2-Wire serial control Interface (I2C style; /Write capable)
emPowerAudio™
Datasheet Revision 2.8
Page 1 of 108
November 2015
1 page  
5. BLOCK DIAGRAM
NAU88C14
VSSSPK
VDDSPK
VSSA
VSSD
VDDA
VDDB
VDDC
ADCOUT
DACIN
BCLK
FS
MODE
SCLK
SDIO
CSb/GPIO
MCLK
emPowerAudio™
Datasheet Revision 2.8
Figure 2: NAU88C14 General Block Diagram
Page 5 of 108
November 2015
5 Page 
NAU88C14
Figure 38: PCM Time Slot Mode (Time slot = 0) (Special mode) ................................................................................58
Figure 39: The Programmable ADCOUT Pin ..............................................................................................................87
Figure 40: SPI Write Timing Diagram..........................................................................................................................94
Figure 41: 2-Wire Timing Diagram ..............................................................................................................................95
Figure 42: Audio Interface Slave Mode Timing Diagram .............................................................................................96
Figure 43: Audio Interface in Master Mode Timing Diagram .......................................................................................96
Figure 44: PCM Audio Interface Slave Mode Timing Diagram ....................................................................................97
Figure 45: PCM Audio Interface Slave Mode Timing Diagram ....................................................................................97
Figure 46: PCM Audio Interface Slave Mode (PCM Time Slot Mode )Timing Diagram..............................................98
Figure 47: PCM Audio Interface Master Mode (PCM Time Slot Mode )Timing Diagram.............................................98
Figure 48: MCLK Timing Diagram...............................................................................................................................99
Figure 49: DAC Filter Frequency Response..............................................................................................................104
Figure 50: ADC Filter Frequency Response..............................................................................................................104
Figure 51: DAC Filter Ripple .....................................................................................................................................104
Figure 52: ADC Filter Ripple .....................................................................................................................................104
Figure 53: Application Diagram For 24-Pin QFN.......................................................................................................105
emPowerAudio™
Datasheet Revision 2.8
Page 11 of 108
November 2015
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet NAU88C14.PDF ] | |
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