WM8903LGEFK/RV Wolfson Microelectronics, WM8903LGEFK/RV Datasheet - Page 84

• Manufacturer Part Number: WM8903LGEFK/RV
• Description: Audio CODECs ULTRA LOW PWR HI FI CODEC
• Manufacturer: Wolfson Microelectronics

Specifications of WM8903LGEFK/RV

• Audio Codec Type: Stereo Codec
• No. Of Adcs: 2
• No. Of Dacs: 2
• No. Of Input Channels: 6
• No. Of Output Channels: 8
• Adc / Dac Resolution: 24bit
• Sampling Rate: 96kHz
• Operating Temperature Range: -40°C To +85°C
• Rohs Compliant: Yes
• Adcs / Dacs Signal To Noise Ratio: 96dB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WM8903
w
Figure 50 TDM in DSP Mode A
Figure 51 TDM in DSP Mode B
COMPANDING
The WM8903 supports A-law and μ-law companding on both transmit (ADC) and receive (DAC)
sides as shown in Table 55. Companding converts 13 bits (μ-law) or 12 bits (A-law) to 8 bits using
non-linear quantization. This provides greater precision for low-amplitude signals than for
high-amplitude signals, resulting in a greater usable dynamic range than 8 bit linear quantization.
Table 55 Companding Control
ADCDAT /
R24 (18h)
Audio
Interface 0
DACDAT
REGISTER
ADDRESS
BCLK
LRC
SLOT0 L
1 BCLK
BIT
3
2
1
0
ADC_COMP
ADC_COMPMO
DE
DAC_COMP
DAC_COMPMO
DE
SLOT0 R
LABEL
SLOT1 L
DEFAULT
1/fs
0
0
0
0
SLOT1 R
ADC Companding Enable
0 = disabled
1 = enabled
ADC Companding Type
0 = μ-law
1 = A-law
DAC Companding Enable
0 = disabled
1 = enabled
DAC Companding Type
0 = μ-law
1 = A-law
PP, Rev 3.1, August 2009
DESCRIPTION
Pre-Production
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