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WM8987LGECO/V Folha de dados(PDF) 12 Page - Wolfson Microelectronics plc

Nome de Peças WM8987LGECO/V
Descrição Electrónicos  Stereo CODEC for Portable Audio Applications
PDF  58 Pages
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Fabricante Electrônico  WOLFSON [Wolfson Microelectronics plc]
Página de início  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8987LGECO/V Folha de dados(HTML) 12 Page - Wolfson Microelectronics plc

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WM8987L
Pre-Production
w
PP Rev 3.0 January 2007
12
Test Conditions
DCVDD = 1.42V, DBVDD = 3.3V, DGND = 0V, TA = +25
oC, Slave Mode, fs = 48kHz, MCLK = 256fs, 24-bit data, unless
otherwise stated.
PARAMETER
SYMBOL
MIN
TYP
MAX
UNIT
Bit Clock Timing Information
BCLK rise time (10pF load)
tBCLKR
3
ns
BCLK fall time (10pF load)
tBCLKF
3
ns
BCLK duty cycle (normal mode, BCLK = MCLK/n)
tBCLKDS
50:50
BCLK duty cycle (USB mode, BCLK = MCLK)
tBCLKDS
TMCLKDS
Audio Data Input Timing Information
ADCLRC/DACLRC propagation delay from BCLK falling edge
tDL
10
ns
ADCDAT propagation delay from BCLK falling edge
tDDA
40
ns
DACDAT setup time to BCLK rising edge
tDST
10
ns
DACDAT hold time from BCLK rising edge
tDHT
10
ns
AUDIO INTERFACE TIMING – SLAVE MODE
BCLK
DACLRC/
ADCLRC
t
BCH
t
BCL
t
BCY
DACDAT
ADCDAT
t
LRSU
t
DS
t
LRH
t
DH
t
DD
Figure 3 Digital Audio Data Timing – Slave Mode
Test Conditions
DCVDD = 1.42V, DBVDD = 3.3V, DGND = 0V, TA = +25
oC, Slave Mode, fs = 48kHz, MCLK = 256fs, 24-bit data, unless
otherwise stated.
PARAMETER
SYMBOL
MIN
TYP
MAX
UNIT
Audio Data Input Timing Information
BCLK cycle time
tBCY
50
ns
BCLK pulse width high
tBCH
20
ns
BCLK pulse width low
tBCL
20
ns
ADCLRC/DACLRC set-up time to BCLK rising edge
tLRSU
10
ns
ADCLRC/DACLRC hold time from BCLK rising edge
tLRH
10
ns
DACDAT hold time from BCLK rising edge
tDH
10
ns
ADCDAT propagation delay from BCLK falling edge
tDD
10
ns
Note:
BCLK period should always be greater than or equal to MCLK period.



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