WM8993 Datasheet, PDF (25/229 Pages) Wolfson Microelectronics plc – Audio Hub CODEC for Multimedia Phones

Production Data
WM8993
Test Conditions
DCVDD = 1.2V, AVDD2 = DBVDD = CPVDD = 1.8V, AVDD1 = 3.0V, SPKVDD = 5V, DGND=AGND=CPGND=SPKGND=0V,
TA = +25^oC, 1kHz sinusoidal signal, fs = 48kHz, PGA gain = 0dB, 24-bit audio data unless otherwise stated.
PARAMETER
FLL
H22 Input Frequency
H23 Lock time
H24 Free-running mode start-up time
H25 Free-running mode frequency accuracy
GPIO
H26 Interrupt response time for accessory /
button detect
TEST CONDITIONS
MIN
FLL_CLK_REF_DIV = 00
FLL_CLK_REF_DIV = 01
FREF=32kHz,
FOUT=12.288MHz
FREF=12MHz,
FOUT=12.288MHz
VMID enabled
Reference supplied initially
No reference provided
0.032
0.032
Input de-bounced
Input not de-bounced
2¹⁹ / fCLK_SYS
TYP
2.5
300
100
+/-10
+/-30
0
MAX
UNIT
13.5
MHz
27
MHz
ms
μs
μs
%
%
2²² / fCLK_SYS
s
s
TERMINOLOGY
1. Signal-to-Noise Ratio (dB) – SNR is a measure of the difference in level between the maximum full scale output
signal and the output with no input signal applied.
2. Total Harmonic Distortion (dB) – THD is the level of the rms value of the sum of harmonic distortion products relative
to the amplitude of the measured output signal.
3. Total Harmonic Distortion plus Noise (dB) – THD+N is the level of the rms value of the sum of harmonic distortion
products plus noise in the specified bandwidth relative to the amplitude of the measured output signal.
4. Crosstalk (L/R) (dB) – left-to-right and right-to-left channel crosstalk is the measured signal level in the idle channel at
the test signal frequency relative to the signal level at the output of the active channel. The active channel is
configured and supplied with an appropriate input signal to drive a full scale output, with signal measured at the
output of the associated idle channel.
5. Multi-Path Channel Separation (dB) – is the measured signal level in the idle path at the test signal frequency relative
to the signal level at the output of the active path. The active path is configured and supplied with an appropriate input
signal to drive a full scale output, with signal measured at the output of the specified idle path.
6. Mute Attenuation – This is a measure of the difference in level between the full scale output signal and the output with
mute applied.
7. All performance measurements carried out with 20kHz low pass filter, and where noted an A-weighted filter. Failure to
use such a filter will result in higher THD and lower SNR readings than are found in the Electrical Characteristics. The
low pass filter removes out of band noise; although it is not audible it may affect dynamic specification values.
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PD, November 2010, Rev 4.0
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