SGTL5000XNAA3R2 Datasheet, PDF (12/68 Pages) Freescale Semiconductor, Inc – Low Power Stereo Codec with Headphone Amp

FUNCTIONAL DESCRIPTION
INTRODUCTION
FUNCTIONAL DESCRIPTION
INTRODUCTION
The SGTL5000 is a low power stereo codec with
integrated headphone amplifier. It is designed to provide a
complete audio solution for portable products needing
LINEIN, mic-in, LINEOUT, headphone-out, and digital I/O.
Deriving it’s architecture from best in class Freescale
integrated products that are currently on the market, the
SGTL5000 is able to achieve ultra low power with very high
performance and functionality, all in one of the smallest
footprints available. Target markets include portable media
players, GPS units and smart phones. Features such as
capless headphone design and USB clocking mode (12 MHz
SYS_MCLK input) help lower overall system cost.
In summary, the SGTL5000 accepts the following inputs:
• Line input
• Microphone input, with mic bias
• Digital I²S input
In addition, the SGTL5000 supports the following outputs:
• Line output
• Headphone output
• Digital I²S output
The following digital audio processing is included to allow
for product differentiation:
• Digital mixer
• Freescale Surround
• Freescale Bass Enhancement
• Tone Control, parametric equalizer, or graphic equalizer
The SGTL5000 can accept an external standard master
clock at a multiple of the sampling frequency (i.e. 256*Fs,
385*Fs, 512*Fs). In addition it can take non-standard
frequencies and use the internal PLL to derive the audio
clocks. The device supports 8.0 kHz, 11.025 kHz, 16 kHz,
22.05 kHz, 24 kHz, 32 kHz, 44.1kHz, 48 kHz, 96 kHz
sampling frequencies.
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
SYSTEM BLOCK DIAGRAM W/ SIGNAL FLOW AND
GAIN MAP
Figure 8 shows a block diagram that highlights the signal
flow and gain map for the SGTL5000.
To guarantee against clipping, it is important that the gain
in a signal path in addition to the signal level does not exceed
0 dB at any point.
Analog Gain
Digital Gain
LINE_IN
MIC_IN
MIC GAIN
(0dB, 20dB,
30dB, 40dB )
I2S_DIN
I2S_DOUT
Analog
Gain
(0 to
22.5dB)
ADC
Audio
Switch
DAC Volume
Control
-90dB to 0dB
DAC
Headphone Volume Control
-52dB to +12dB
(CHIP_ANA_HP_CTRL)
HP_OUT
Line Out Volume Control
(CHIP_LINE_OUT_VOL)
LINEOUT
Mix
+6dB
AVC
+12dB
Surround
Bass Enhancement
+6dB
Tone Control /GEQ/PEQ
+12dB
Only Gain is shown for the Digital Audio Processing blocks. For complete description
please see Digital Audio Processing section.
Figure 8. System Block Diagram, Signal Flow and Gain
SGTL5000
12
Analog Integrated Circuit Device Data
Freescale Semiconductor