Audio/Touchpanel CODEC. WM9715L Datasheet

WM9715L CODEC. Datasheet pdf. Equivalent

Part WM9715L
Description Audio/Touchpanel CODEC
Feature w WM9715L AC’97 Audio and Touchpanel CODEC DESCRIPTION The WM9715L is a highly integrated input /.
Manufacture Cirrus Logic
Datasheet
Download WM9715L Datasheet



WM9715L
w
WM9715L
AC’97 Audio and Touchpanel CODEC
DESCRIPTION
The WM9715L is a highly integrated input / output device
designed for mobile computing and communications. The
device can connect directly to a 4-wire or 5-wire touchpanel,
mono or stereo microphones, stereo headphones and a
mono speaker, reducing total component count in the
system. Additionally, phone input and output pins are
provided for seamless integration with wireless
communication devices.
The WM9715L also offers up to four auxiliary ADC inputs for
analogue measurements such as temperature or light. To
monitor the battery voltage in portable systems, the
WM9715L has two uncommitted comparator inputs.
All device functions are accessed and controlled through a
single AC-Link interface compatible with the AC’97 standard
(rev 2.2). Additionally, the WM9715L can generate interrupts
to indicate pen down, pen up, availability of touchpanel data,
low battery, and dead battery.
The WM9715L operates at supply voltages from 1.8 to 3.6
Volts. Each section of the chip can be powered down under
software control to save power. The device is available in a
small leadless 7x7mm QFN package, ideal for use in hand-
held portable systems.
BLOCK DIAGRAM
FEATURES
AC’97 Rev 2.2 compatible stereo CODEC
- DAC SNR 90dB, THD –86dB
- ADC SNR 88dB, THD –88dB
- Variable Rate Audio, supports all WinCE sample rates
- Tone Control, Bass Boost and 3D Enhancement
On-chip 45mW headphone driver
On-chip 400mW mono speaker driver
Stereo, mono or differential microphone input
- Automatic Level Control (ALC)
Auxiliary mono DAC (ring tone or DC level generation)
Seamless interface to wireless chipset
Resistive touchpanel interface
- Supports 4-wire and 5-wire panels
- 12-bit resolution, INL 3 LSBs (<0.5 pixels)
- X, Y and touch-pressure (Z) measurement
- Pen-down detection supported in Sleep Mode
2 comparator inputs for battery monitoring
Up to 4 auxiliary ADC inputs
1.8V to 3.6V supplies
7x7mm QFN
APPLICATIONS
Personal Digital Assistants (PDA)
Smartphones
Handheld and Tablet Computers
WOLFSON MICROELECTRONICS plc
To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews
Production Data, November 2011, Rev 4.1
Copyright 2011 Wolfson Microelectronics plc.



WM9715L
WM9715L
TABLE OF CONTENTS
Production Data
DESCRIPTION....................................................................................................... 1 
FEATURES ............................................................................................................ 1 
APPLICATIONS..................................................................................................... 1 
BLOCK DIAGRAM ................................................................................................ 1 
TABLE OF CONTENTS......................................................................................... 2 
PIN CONFIGURATION .......................................................................................... 4 
ORDERING INFORMATION.................................................................................. 4 
PIN DESCRIPTION................................................................................................ 5 
ABSOLUTE MAXIMUM RATINGS ........................................................................ 6 
RECOMMENDED OPERATING CONDITIONS..................................................... 6 
ELECTRICAL CHARACTERISTICS ..................................................................... 7 
AUDIO OUTPUTS ............................................................................................................ 7 
AUDIO INPUTS................................................................................................................ 8 
AUXILIARY MONO DAC (AUXDAC)................................................................................ 8 
TOUCHPANEL AND AUXILIARY ADC ............................................................................ 9 
COMPARATORS ............................................................................................................. 9 
REFERENCE VOLTAGES ............................................................................................. 10 
DIGITAL INTERFACE CHARACTERISTICS ................................................................. 10 
HEADPHONE / SPEAKER OUTPUT THD VERSUS POWER ...................................... 11 
POWER CONSUMPTION .............................................................................................. 12 
DEVICE DESCRIPTION ...................................................................................... 13 
INTRODUCTION ............................................................................................................ 13 
AUDIO PATHS OVERVIEW........................................................................................... 14 
AUDIO INPUTS.................................................................................................... 15 
LINE INPUT.................................................................................................................... 15 
MICROPHONE INPUT ................................................................................................... 15 
PHONE INPUT ............................................................................................................... 17 
PCBEEP INPUT ............................................................................................................. 18 
AUDIO ADC......................................................................................................... 19 
RECORD SELECTOR.................................................................................................... 20 
RECORD GAIN .............................................................................................................. 21 
AUTOMATIC LEVEL CONTROL.................................................................................... 22 
AUDIO DACS ...................................................................................................... 25 
STEREO DAC ................................................................................................................ 25 
AUXILIARY DAC ............................................................................................................ 28 
ANALOGUE AUDIO OUTPUTS .......................................................................... 30 
HEADPHONE OUTPUTS – HPOUTL AND HPOUTR ................................................... 30 
EAR SPEAKER OUTPUT – OUT3................................................................................. 31 
LOUDSPEAKER OUTPUTS – LOUT2 AND ROUT2 ..................................................... 32 
PHONE OUTPUT (MONOOUT)..................................................................................... 33 
THERMAL SENSOR ...................................................................................................... 33 
DIGITAL AUDIO (SPDIF) OUTPUT ............................................................................... 34 
AUDIO MIXERS ............................................................................................................. 35 
VARIABLE RATE AUDIO / SAMPLE RATE CONVERSION .............................. 37 
TOUCHPANEL INTERFACE ............................................................................... 38 
PRINCIPLE OF OPERATION - FOUR-WIRE TOUCHPANEL ....................................... 38 
PRINCIPLE OF OPERATION - FIVE-WIRE TOUCHPANEL ......................................... 40 
CONTROLLING THE TOUCHPANEL DIGITISER......................................................... 42 
w
PD, Rev 4.1, November 2011
2





@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)