WM8731SEDS/V Wolfson Microelectronics, WM8731SEDS/V Datasheet - Page 13

• Manufacturer Part Number: WM8731SEDS/V
• Description: Audio CODECs Stereo Codec with H/P
• Manufacturer: Wolfson Microelectronics

Specifications of WM8731SEDS/V

• Interface Type: Serial (2-Wire or 3-Wire), I2S
• Resolution: 24 bit
• Operating Supply Voltage: 2.7 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SSOP-28
• Minimum Operating Temperature: - 40 C
• Number Of Channels: 2 ADC / 2 DAC
• Snr: 90 dB
• Thd Plus Noise: - 84 dB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WM8731 / WM8731L
Notes:
1.
2.
3.
4.
TERMINOLOGY
1.
2.
3.
4.
w
Stereo Headphone Output
0dB Full scale output voltage
Max Output Power
Signal to Noise Ratio
(Note 1,3)
Total Harmonic Distortion
Power Supply Rejection Ratio
Programmable Gain
Programmable Gain Step Size
Mute attenuation
Microphone Input to Headphone Output Side Tone Mode
0dB Full scale output voltage
Signal to Noise Ratio
(Note 1,3)
Power Supply Rejection Ratio
Programmable Attenuation
Programmable Attenuation Step
Size
Mute attenuation
Test Conditions
AVDD, HPVDD, DBVDD = 1.8V, AGND = 0V, DCVDD = 1.5V, DGND = 0V, T
256fs unless otherwise stated.
Ratio of output level with 1kHz full scale input, to the output level with the input short circuited, measured ‘A’ weighted over a 20Hz
to 20kHz bandwidth using an Audio analyser.
Ratio of output level with 1kHz full scale input, to the output level with all zeros into the digital input, measured ‘A’ weighted over a
20Hz to 20kHz bandwidth.
All performance measurements done with 20kHz low pass filter, and where noted an A-weight filter. Failure to use such a filter will
result in higher THD+N and lower SNR and Dynamic Range 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.
VMID decoupled with 10uF and 0.1uF capacitors (smaller values may result in reduced performance).
Signal-to-noise ratio (dB) - SNR is a measure of the difference in level between the full scale output and the output
with no signal applied. (No Auto-zero or Automute function is employed in achieving these results).
Dynamic range (dB) - DR is a measure of the difference between the highest and lowest portions of a signal.
Normally a THD+N measurement at 60dB below full scale. The measured signal is then corrected by adding the 60dB
to it. (e.g. THD+N @ -60dB= -32dB, DR= 92dB).
THD+N (dB) - THD+N is a ratio, of the rms values, of (Noise + Distortion)/Signal.
Channel Separation (dB) - Also known as Cross-Talk. This is a measure of the amount one channel is isolated from
the other. Normally measured by sending a full scale signal down one channel and measuring the other.
PSRR
PSRR
SNR
THD
SNR
P
O
20Hz - 20kHz, 100mVpp
1kHz, -5dB FS signal
1kHz, -2dB FS signal
1kHz 100mVpp
20Hz to 20kHz
1kHz 100mVpp
1kHz, 0dB
100mVpp
A-weighted
1kHz, 0dB
RL = 32 Ω
RL = 16 Ω
R
R
1kHz
1kHz
L
L
1kHz
1kHz
= 32Ω
= 32Ω
A
85
-73
6
86
= +25
o
C, Slave Mode, fs = 48kHz, XTI/MCLK =
AVDD/3.3
AVDD/3.3
1.0 x
1.0 x
0.08
90
50
45
80
-62
3
18
95
50
45
80
9
0
1
PD, Rev 4.8, April 2009
15
-60
-40
0.1
1
6
Production Data
Vrms
Vrms
dB
dB
dB
dB
dB
mW
dB
dB
dB
dB
dB
dB
%
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