WM8952 View Datasheet(PDF) - Wolfson Microelectronics plc
Part Name
Description
Manufacturer
WM8952 Datasheet PDF : 72 Pages
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WM8952
Pre Production
Test Conditions
DCVDD=1.8V, DBVDD=3.3V, AVDD=3.3V, TA = +25oC, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Digital Input / Output
Input HIGH Level
VIH
0.7×
DBVDD
DBVDD+0.7
V
Input LOW Level
Output HIGH Level
VIL
GND-0.7
0.3×DBVDD
V
VOH
IOL=1mA
0.9×
DBVDD
DBVDD
V
Output LOW Level
Input Capacitance
VOL
IOH-1mA
GND
0.1xDBVDD
V
All digital pins
10
pF
Input leakage
All digital pins except MODE -900
+900
nA
MODE pin
-90
+90
μA
TERMINOLOGY
1. Full-scale input levels scale in relation to AVDD depending upon the input or output used. For example, when AVDD
= 3.3V, 0dBFS = 1Vrms (0dBV). When AVDD < 3.3V the absolute level of 0dBFS will decrease with a linear
relationship to AVDD.
2. Input level to RIP and LIP in differential configurations is limited to a maximum of -3dB or performance will be
reduced.
3. Signal-to-noise ratio (dB) – SNR is the difference in level between a reference full scale output signal and the device
output with no signal applied. This ratio is also called idle channel noise. (No Auto-zero or Automute function is
employed in achieving these results).
4. THD is the difference in level between a reference output signal and the first seven harmonics of the output signal. To
calculate the ratio, the fundamental frequency of the output signal is notched out and an RMS value of the next seven
harmonics is calculated.
5. Total Harmonic Distortion plus Noise (dB) – THD+N is the difference in level between a reference output signal and
the sum of the harmonics, wide-band noise and interference on the output signal. To calculate the ratio, the
fundamental frequency of the output signal is notched out and an RMS value of the total harmonics, wide-band noise
and interference is calculated.
w
PP, Rev 3.1, June 2011
8
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