WM8941GEFL/RV Wolfson Microelectronics, WM8941GEFL/RV Datasheet - Page 10

• Manufacturer Part Number: WM8941GEFL/RV
• Description: Audio CODECs Mono CODEC
• Manufacturer: Wolfson Microelectronics

Specifications of WM8941GEFL/RV

• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-28
• Minimum Operating Temperature: - 25 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WM8941
w
TERMINOLOGY
1.
2.
3.
4.
5.
6.
Test Conditions
DCVDD=1.8V, DBVDD=3.3V, AVDD=3.3V, SPKVDD =3.3V, , VBVDD=3.3V, T
unless otherwise stated.
PARAMETER
Low pass filter order
Low Pass Filter Response (referenced to 100kHz)
Response at 2.4MHz
Response at 5.13MHz
Response at 9.04MHz
Response at 13.32MHz
Microphone Bias
Bias Voltage
Bias Current Source
Output Noise Voltage
Digital Input / Output
Input HIGH Level
Input LOW Level
Output HIGH Level
Output LOW Level
Input Capacitance
Input leakage
example, when AVDD = 3.3V, 0dBFS = 1V
with a linear 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).
harmonics of that signal. The reference output signal need not be at full scale amplitude; THD is typically measured
using an output power of 20mW into a 16ohm load, corresponding to a reference signal level of -5dB. However the
stated test conditions include input signal level, signal gain settings, output load characteristics and power supply
voltages 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.
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 and output levels scale in relation to AVDD or SPKVDD depending upon the input or output used. For
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
Total Harmonic Distortion (dB) – THD is the difference in level between a reference output signal and the first seven
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
SYMBOL
V
V
V
V
OH
OL
IH
IL
rms
(0dBV). When AVDD < 3.3V the absolute level of 0dBFS will decrease
All digital pins except MODE
R
for V
VBREF
R
TEST CONDITIONS
LOAD
1kHz to 20kHz
MICBIAS
All digital pins
=187Ω, R
MBVSEL=0
MBVSEL=1
MODE pin
=75Ω, 0dB gain
I
I
OL
OH
=1mA
-1mA
within +/-3%
OUT
=75Ω,
A
= +25
GND-0.7
DBVDD
DBVDD
AVDD
-11.0
0.85*
GND
0.7×
0.9×
-900
-0.1
-0.5
-3.0
-90
MIN
o
C, 1kHz signal, fs = 48kHz, 24-bit audio data
0.65*AVDD
0.9*AVDD
3
-0.2
-1.6
-7.0
15
10
TYP
rd
0
PP, Rev 3.3, December 2007
order
DBVDD+0.7
0.3×DBVDD
0.1xDBVDD
DBVDD
AVDD
0.95*
+900
+90
MAX
-3.0
0.1
0.1
3
0
Pre Production
nV/√Hz
mA
UNIT
µA
dB
dB
dB
dB
pF
nA
V
V
V
V
V
V
10