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WM8950 Scheda tecnica(PDF) 40 Page - Wolfson Microelectronics plc

Il numero della parte WM8950
Spiegazioni elettronici  ADC WITH MICROPHONE INPUT AND PROGRAMMABLE DIGITAL FILTERS
PDF  52 Pages
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Produttore elettronici  WOLFSON [Wolfson Microelectronics plc]
Homepage  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8950 Scheda tecnica(HTML) 40 Page - Wolfson Microelectronics plc

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WM8950
Preliminary Technical Data
w
PTD Rev 2.1 June 2005
40
BIASEN
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R1
Power
management 1
3
BIASEN
0
Analogue amplifier bias control
Table 36 BIASEN Control
ESTIMATED SUPPLY CURRENTS
When the ADC is enabled it is estimated that approximately 4mA will be drawn from DCVDD when
fs=48kHz (This will be lower at lower sample rates). When the PLL is enabled an additional 700
microamps will be drawn from DCVDD.
Table 59 shows the estimated 3.3V AVDD current drawn by various circuits, by register bit.
REGISTER BIT
AVDD CURRENT (MILLIAMPS)
BUFDCOPEN
0.1
PLLEN
1.4 (with clocks applied)
MICBEN
0.5
BIASEN
0.3
BUFIOEN
0.1
VMIDSEL
10K=>0.3, less than 0.1 for 100k/500k
INPPGAEN
0.2
ADCEN
x64 (ADCOSR=0)=>2.6, x128 (ADCOSR=1)=>4.9
Table 37 AVDD Supply Current



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