WM8974GEFL/V Wolfson Microelectronics, WM8974GEFL/V Datasheet - Page 8

• 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

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MICN input only in single ended microphone configuration. Maximum input signal to MICP without distortion is -3dBV.
Hold Time is the length of time between a signal detected being too quiet and beginning to ramp up the gain. It does
not apply to ramping down the gain when the signal is too loud, which happens without a delay.
Ramp-up and Ramp-Down times are defined as the time it takes for the PGA to change it’s gain by 6dB.
All hold, ramp-up and ramp-down times scale proportionally with MCLK
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).
THD+N (dB) – THD+N is a ratio, of the rms values, of (Noise + Distortion)/Signal.
The maximum output voltage can be limited by the speaker power supply. If MONOBOOST=1 then SPKVDD should
be 1.5xAVDD or higher to prevent clipping taking place in the output stage.
PD, Rev 4.5, September 2008
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