поискавой системы для электроныых деталей
  Russian  ▼
ALLDATASHEETRU.COM

X  

Preview PDF HTML

WM8950 датащи(PDF) 21 Page - Cirrus Logic

номер детали WM8950
подробное описание детали  ADC with Microphone Input and Programmable Digital Filters
PDF  60 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
производитель  CIRRUS [Cirrus Logic]
домашняя страница  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

WM8950 датащи(HTML) 21 Page - Cirrus Logic

Back Button WM8950 Datasheet HTML 17Page - Cirrus Logic WM8950 Datasheet HTML 18Page - Cirrus Logic WM8950 Datasheet HTML 19Page - Cirrus Logic WM8950 Datasheet HTML 20Page - Cirrus Logic WM8950 Datasheet HTML 21Page - Cirrus Logic WM8950 Datasheet HTML 22Page - Cirrus Logic WM8950 Datasheet HTML 23Page - Cirrus Logic WM8950 Datasheet HTML 24Page - Cirrus Logic WM8950 Datasheet HTML 25Page - Cirrus Logic Next Button
Zoom Inzoom in Zoom Outzoom out
 21 / 60 page
background image
WM8950
Rev 4.5
21
NOTCH FILTER WORKED EXAMPLE
The following example illustrates how to calculate the a0 and a1 coefficients for a desired centre
frequency and -3dB bandwidth.
fc = 1000 Hz
fb = 100 Hz
fs = 48000 Hz
s
c
0
f
/
f
2
w
=
2
x (1000 / 48000) = 0.1308996939 rads
s
b
b
f
/
f
2
w
=
2
x (100 / 48000) = 0.01308996939 rads
)
2
/
w
tan(
1
)
2
/
w
tan(
1
a
b
b
0
=
)
2
/
9
0130899693
.
0
tan(
1
)
2
/
9
0130899693
.
0
tan(
1
= 0.9869949627
)
w
cos(
)
a
1
(
a
0
0
1
=
)
1308996939
.
0
cos(
)
9869949627
.
0
1
(
= -1.969995945
NFn_A0 = -a0 x 213 = -8085 (rounded to nearest whole number)
NFn_A1 = -a1 x 212 = 8069 (rounded to nearest whole number)
These values are then converted
to 2’s complement:
NFA0 = 14’h206B = 14’b10000001101011
NFA1 = 14’h1F85 = 14’b01111110000101
DIGITAL ADC VOLUME CONTROL
The output of the ADCs can be digitally attenuated over a range from
–127dB to 0dB in 0.5dB steps.
The gain for a given eight-bit code X is given by:
Gain = 0.5 x (x
–255) dB for 1
 x  255, MUTE for x = 0
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R15
ADC Digital
Volume
7:0
ADCVOL
[7:0]
11111111
( 0dB )
ADC Digital Volume Control
0000 0000 = Digital Mute
0000 0001 = -127dB
0000 0010 = -126.5dB
... 0.5dB steps up to
1111 1111 = 0dB
Table 13 ADC Volume



Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60


датащи скачать

Go To PDF Page


ссылки URL



Вашему бизинису помогли Аллдатащит?  [ DONATE ] 

Что такое Аллдатащит   |   реклама   |   контакт   |   Конфиденциальность   |   Ссылка на техническое описание    |   обмен ссыками   |   поиск по производителю
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com