wm8952 Wolfson Microelectronics plc, wm8952 Datasheet - Page 7

• Manufacturer Part Number: wm8952
• Description: Mono Adc With Microphone Pre-amplifier
• Manufacturer: Wolfson Microelectronics plc

Pre Production
w
TERMINOLOGY
1.
2.
3.
4.
5.
Test Conditions
DCVDD=1.8V, DBVDD=3.3V, AVDD=3.3V, T
PARAMETER
Digital Input / Output
Input HIGH Level
Input LOW Level
Output HIGH Level
Output LOW Level
Input Capacitance
Input leakage
= 3.3V, 0dBFS = 1V
relationship to AVDD.
reduced.
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).
calculate the ratio, the fundamental frequency of the output signal is notched out and an RMS value of the next seven
harmonics is calculated.
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.
Full-scale input levels scale in relation to AVDD depending upon the input or output used. For example, when AVDD
Input level to RIP and LIP in differential configurations is limited to a maximum of -3dB or performance will be
Signal-to-noise ratio (dB) – SNR is the difference in level between a reference full scale output signal and the device
THD is the difference in level between a reference output signal and the first seven harmonics of the output signal. To
Total Harmonic Distortion plus Noise (dB) – THD+N is the difference in level between a reference output signal and
rms
(0dBV). When AVDD < 3.3V the absolute level of 0dBFS will decrease with a linear
SYMBOL
V
V
V
V
OH
OL
A
IH
IL
= +25
All digital pins except MODE
o
C, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise stated.
TEST CONDITIONS
All digital pins
MODE pin
I
I
OL
OH
=1mA
-1mA
GND-0.7
DBVDD
DBVDD
GND
0.7×
0.9×
-900
-90
MIN
10
TYP
PP, Rev 3.0, December 2008
DBVDD+0.7
0.3×DBVDD
0.1xDBVDD
DBVDD
+900
+90
MAX
WM8952
UNIT
μA
pF
nA
V
V
V
V
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