WM8950 Datasheet, PDF (9/52 Pages) Wolfson Microelectronics plc – ADC WITH MICROPHONE INPUT AND PROGRAMMABLE DIGITAL FILTERS

Preliminary Technical Data
WM8950
Test Conditions
DCVDD=1.8V, DBVDD=AVDD=SPKVDD=3.3V, DGND=AGND=SPKGND=0V, TA=+25^oC, Slave Mode, fs=48kHz, MCLK=256fs,
24-bit data, unless otherwise stated.
PARAMETER
Audio Data Input Timing Information
FRAME propagation delay from BCLK falling edge
ADCDAT propagation delay from BCLK falling edge
SYMBOL
MIN
TYP
MAX
UNIT
tDL
10
ns
tDDA
10
ns
AUDIO INTERFACE TIMING – SLAVE MODE
Figure 3 Digital Audio Data Timing – Slave Mode
Test Conditions
DCVDD=1.8V, DBVDD=AVDD=SPKVDD=3.3V, DGND=AGND=SPKGND=0V, TA=+25^oC, Slave Mode, fs=48kHz, MCLK= 256fs,
24-bit data, unless otherwise stated.
PARAMETER
Audio Data Input Timing Information
BCLK cycle time
BCLK pulse width high
BCLK pulse width low
FRAME set-up time to BCLK rising edge
FRAME hold time from BCLK rising edge
Note:
SYMBOL
tBCY
tBCH
tBCL
tLRSU
tLRH
BCLK period should always be greater than or equal to MCLK period.
MIN
TYP
MAX
UNIT
50
ns
20
ns
20
ns
10
ns
10
ns
w
PTD Rev 2.1 June 2005
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