WM8731SEDS/V Wolfson Microelectronics, WM8731SEDS/V Datasheet - Page 37

• 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
Figure 27 I
Figure 28 Right Justified Mode
Figure 29 DSP/PCM Mode Audio Interface (mode A, LRP=1)
w
DACLRC/
ADCLRC
DACLRC/
ADCLRC
DACDAT/
ADCDAT
DACDAT/
ADCDAT
BCLK
BCLK
2
S Mode
MSB
1 BCLK
1
Right Justified mode is where the LSB is available on the rising edge of BCLK preceding a DACLRC
or ADCLRC transition, yet MSB is still transmitted first.
In DSP/PCM mode, the left channel MSB is available on either the 1
rising edge of BCLK (selectable by LRP) following a rising edge of LRC. Right channel data
immediately follows left channel data. Depending on word length, BCLK frequency and sample rate,
there may be unused BCLK cycles between the LSB of the right channel data and the next sample.
2
MSB
3
1
LEFT CHANNEL
LEFT CHANNEL
2
3
n-2 n-1
n-2 n-1
n
LSB
n
LSB
1/fs
1/fs
MSB
1 BCLK
1
MSB
2
3
1
RIGHT CHANNEL
RIGHT CHANNEL
2
3
n-2 n-1
st
(mode B) or 2
n-2 n-1
n
LSB
PD, Rev 4.8, April 2009
n
LSB
Production Data
nd
(mode A)
37