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PDF DA7219 Data sheet ( Hoja de datos )
| Número de pieza | DA7219 | |
| Descripción | Audio codec | |
| Fabricantes | Dialog Semiconductor | |
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DA7219
Audio codec with Advanced Accessory Detect
Company confidential
General description
The DA7219 is an audio codec with Advanced Accessory Detection (AAD).
DA7219 contains a mono microphone to ADC path, and a stereo DAC to HP path.
The AAD block supports three-pole (headphone) and four-pole (headset) jacks, and allows the
automatic pin order switching of MIC/GND on CTIA or OMTP headsets. It also supports automatic
button detection.
Key features
■ High performance mono microphone to ADC
record path with 90 dB SNR
□ ADC digital filters with audio and voice
mode high-pass characteristics
□ A low-noise microphone bias regulator
with programmable output
■ High performance stereo DAC to headphone
playback path with 100 dB SNR
□ DAC digital filters with audio and voice
mode high-pass cut-off and 5-band
equaliser
■ Advanced Accessory Detection supports
□ Three/four pole jack detection
□ MIC/GND polarity switching
□ Multiple button detection
□ Headphone impedance testing
■ A microphone input with ALC (automatic
level control)
■ Digital Sidetone path with gain
■ Digital tone generator
■ System controller for simplified pop-free
start-up and shutdown
■ Single interface 24 kHz ADC/48 kHz DAC
mixed sample rates supported
■ Shutdown mode for very low current
consumption during standby
■ Phase locked loop with sample rate
tracking to generate system clock
■ 4-wire digital audio interface with support
for I2S, TDM and other audio formats
■ 2-wire I2C compatible with support for
High Speed mode up to 3.4 MHz
■ WL-CSP RouteEasy™ package for low
cost PCB manufacture
Applications
■ Chromebooks
■ Portable audio applications
■ Tablets and eBooks
■ Headphone accessories
■ Remote controllers
■ Gaming controllers
Datasheet
Revision 2.1
1 of 123
17-Dec-2015
© 2015 Dialog Semiconductor
1 page  
DA7219
Audio codec with Advanced Accessory Detect
Company confidential
B.1 Audio inputs ...................................................................................................................... 116
B.2 Microphone bias................................................................................................................ 117
B.3 Audio outputs .................................................................................................................... 117
B.4 Headphone charge pump ................................................................................................. 118
B.5 Digital interfaces................................................................................................................ 119
B.6 References ........................................................................................................................ 119
B.7 Supplies ............................................................................................................................ 120
B.8 Ground .............................................................................................................................. 120
Appendix C PCB layout guidelines ............................................................................................... 121
C.1 Layout and schematic support .......................................................................................... 121
C.2 General recommendations................................................................................................ 121
C.3 Capacitor selection............................................................................................................ 122
Datasheet
Revision 2.1
5 of 123
17-Dec-2015
© 2015 Dialog Semiconductor
5 Page 
DA7219
Audio codec with Advanced Accessory Detect
Company confidential
4.4 Interface output pins
Pin nIRQ
nIRQ is the open drain active-low interrupt output to alert the host to either an accessory or a
level-detect event.
Pin DATOUT
DATOUT is the data output pin which forms part of the Digital Audio Interface. It is used to present
audio record data to the host.
4.5 Interface bidirectional pins
Pin SDA
SDA is the Control Interface (I2C) data input/output and is used in conjunction with SCL to control the
device.
Pin BCLK
BCLK is the bit clock input/output pin which forms part of the Digital Audio Interface (DAI). It is used
to clock audio data bits into or out from the device or both.
Pin WCLK
WCLK is the word clock input/output pin which forms part of the DAI. It is used to indicate whether
the data bits belong to the left or right audio channel.
4.6 Headphone output pins
Pin HP_L
3.6.2 HP_L is the left-channel headphone output. It is ground-centred so the headphone speaker
can be connected directly between HP_L and ground.
Pin HP_R
HP_R is the right-channel single ended headphone output. It is ground-centred so the headphone
speaker can be connected directly between HP_R and ground.
4.7 Charge pump pins
Pin HPCSP
HPCSP is the positive output from the headphone charge pump. It should be connected to GND_CP
via a reservoir capacitor.
Pin HPCSN
HPCSN is the negative output from the headphone charge pump. It must be connected to GND_CP
via a reservoir capacitor.
Pin HPCFP
HPCFP is one of the flying capacitor connections required by the headphone charge pump. It must
be connected to HPCFN via a capacitor.
Pin HPCFN
HPCFN is one of the flying capacitor connections required by the headphone charge pump. It must
be connected to HPCFP via a capacitor.
Datasheet
Revision 2.1
11 of 123
17-Dec-2015
© 2015 Dialog Semiconductor
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet DA7219.PDF ] | |
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