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WM8952ECS/RV Arkusz danych(PDF) 21 Page - Wolfson Microelectronics plc

Numer części WM8952ECS/RV
Szczegółowy opis  Mono ADC with Microphone Pre-amplifier
PDF  72 Pages
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Producent  WOLFSON [Wolfson Microelectronics plc]
Strona internetowa  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8952ECS/RV Arkusz danych(HTML) 21 Page - Wolfson Microelectronics plc

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Pre Production
WM8952
w
PP, Rev 3.1, June 2011
21
The internal MICBIAS circuitry is shown in Figure 9.
Note that the maximum source current
capability for MICBIAS is 3mA. The external biasing resistors therefore must be large enough to limit
the MICBIAS current to 3mA.
Figure 9 Microphone Bias Schematic
AGND
MBVSEL=0
MICBIAS
= 1.8 x VMID
= 0.9 X AVDD
VMID
internal
resistor
internal
resistor
MB
MBVSEL=1
MICBIAS
= 1.3 x VMID
= 0.65 X AVDD



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