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DESCRIPTION
The WM8960 is a low power, high quality stereo CODEC
designed for portable digital audio applications.
Stereo class D speaker drivers provide 1W per channel into 8
loads with a 5V supply. Low leakage, excellent PSRR and
pop/click suppression mechanisms also allow direct battery
connection to the speaker supply. Flexible speaker boost
settings allow speaker output power to be maximised while
minimising other analogue supply currents.
A highly flexible input configuration for up to three stereo
sources is integrated, with a complete microphone interface.
External component requirements are drastically reduced as no
separate microphone, speaker or headphone amplifiers are
required. Advanced on-chip digital signal processing performs
automatic level control for the microphone or line input.
Stereo 24-bit sigma-delta ADCs and DACs are used with low
power over-sampling digital interpolation and decimation filters
and a flexible digital audio interface.
The master clock can be input directly or generated internally by
an onboard PLL, supporting most commonly-used clocking
schemes.
The WM8960 operates at analogue supply voltages down to
2.7V, although the digital supplies can operate at voltages down
to 1.71V to save power. The speaker supply can operate at up
to 5.5V, providing 1W per channel into 8 loads. Unused
functions can be disabled using software control to save power.
The WM8960 is supplied in a very small and thin 5x5mm QFN
package, ideal for use in hand-held and portable systems.
DGND
Jack Detect
WM8960
Stereo CODEC with 1W Stereo Class D Speaker Drivers and
Headphone Drivers for Portable Audio Applications
FEATURES
DAC SNR 98dB (‘A’ weighted), THD -84dB at 48kHz, 3.3V
ADC SNR 94dB (‘A’ weighted), THD -82dB at 48kHz, 3.3V
Pop and click suppression
3D Enhancement
Stereo Class D Speaker Driver
-
<0.1% THD with 1W per channel into 8 BTL speakers
-
70dB PSRR @217Hz
-
87% efficiency (1W output)
-
Flexible internal switching clock
On-chip Headphone Driver
-
40mW output power into 16 at 3.3V
-
Capless mode support
-
THD -75dB at 20mW, SNR 90dB with 16 load
Microphone Interface
-
Pseudo differential for high noise immunity
-
Integrated low noise MICBIAS
-
Programmable ALC / Limiter and Noise Gate
Low Power Consumption
Low Supply Voltages
-
Analogue 2.7V to 3.6V (Speaker supply up to 5.5V)
-
Digital core and I/O: 1.71V to 3.6V
On-chip PLL provides flexible clocking scheme
Sample rates: 8, 11.025, 12, 16, 22.05, 24, 32, 44.1, 48
5x5x0.9mm QFN package
APPLICATIONS
Games consoles
Portable media / DVD players
Mobile multimedia
DCVDD
DBVDD
0 to -21dB,
3dB steps
0 to -21dB,
3dB steps
-73 to 6dB
1dB steps,
mute
+BOOST
LINPUT3/
JD2
LINPUT2
W
WM8960
CLASS D
SPKVDD1
SPKVDD2
SPK_LP
SPK_LN
-12 -> 6dB,
3dB steps,
mute
-17.25 to +30dB,
0.75dB steps
-12 -> 6dB,
3dB steps,
mute
LEFT
MIXER
+
vmid
-
0, 13, 20,
29dB,
mute
+
INPUT
PGAs
ADC
LINPUT1
ADC
DIGITAL
FILTERS
ALC
DAC
DIGITAL
FILTERS
DE-
EMPHASIS
3D ENHANCE
VOLUME
DAC
-73 to 6dB
1dB steps,
mute
HP_L
MONO
MIXER
0dB / -6dB
OUT3
RINPUT1
vmid
-
+
-17.25 to +30dB,
0.75dB steps
0, 13, 20,
29dB,
mute
VOLUME
+
-12 -> 6dB,
3dB steps,
mute
ADC
DAC
RIGHT
MIXER
0 to -21dB,
3dB steps
0 to -21dB,
3dB steps
-73 to 6dB
1dB steps,
mute
+BOOST
-73 to 6dB
1dB steps,
mute
HP_R
-12 -> 6dB,
3dB steps,
mute
RINPUT2
RINPUT3/
JD3
Jack Detect
ADCREF,
DACREF
50K
50K
CLASS D
SPK_RN
SPK_RP
GPIO1
MICBIAS
DIGITAL AUDIO
INTERFACE
A-law and u-law support
PLL
CONTROL
INTERFACE
SPKGND1
SPKGND2
AGND
AVDD
VMID
BCLK
ADCLRC/GPIO1
ADCDAT
DACLRC
DACDAT
MCLK
WOLFSON MICROELECTRONICS plc
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Production Data, October 2011, Rev 4.1
Copyright
2011
Wolfson Microelectronics plc
SCLK
SDIN
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
