WM8974GEFL/V Wolfson Microelectronics, WM8974GEFL/V Datasheet - Page 35

• Manufacturer Part Number: WM8974GEFL/V
• Description: Audio CODECs Mono Codec with Spkr
• Manufacturer: Wolfson Microelectronics

Specifications of WM8974GEFL/V

• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-24
• Minimum Operating Temperature: - 25 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Production Data
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Figure 17 Noise Gate Operation
OUTPUT SIGNAL PATH
Figure 18 DAC Digital Filter Path
The WM8974 output signal paths consist of digital application filters, up-sampling filters, a Hi-Fi
DAC, analogue mixers, speaker and mono output drivers. The digital filters and DAC are enabled by
bit DACEN. The mixers and output drivers can be separately enabled by individual control bits (see
Analogue Outputs). Thus it is possible to utilise the analogue mixing and amplification provided by
the WM8974, irrespective of whether the DACs are running or not.
The WM8974 DAC receives digital input data on the DACDAT pin. The digital filter block processes
the data to provide the following functions:
The high performance sigma-delta audio DAC converts the digital data into an analogue signal.
Digital volume control
Graphic equaliser
A digital peak limiter.
Sigma-Delta Modulation
PD, Rev 4.5, September 2008
WM8974
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