WM8740EDS Просмотр технического описания (PDF) - Wolfson Microelectronics plc
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WM8740EDS Datasheet PDF : 24 Pages
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WM8740
Production Data
PIN NAME
TYPE
DESCRIPTION
Hardware Mode
Normal Mode
23 CSBIWO Digital input
Wordlength:
Internal pull-down Low for 16-bit data.
High for 20-bit
(normal) or 24-bit
I2S data.
24 MODE
Digital input
Low for hardware
Internal pull-up mode.
25 MUTEB
Digital input
Low to soft mute.
Internal pull-up High for normal
operation.
26 MD/DM0
Digital input
De-emphasis mode
Internal pull-up select bit 0.
27 MC/DM1
Digital input
De-emphasis mode
Internal pull-up select bit 1.
28 ML/I2S
Digital input
Audio serial format:
Internal pull-up
Low – right justified.
High – I2S.
Note: Digital input pins have Schmitt trigger input buffers.
Differential Mode
Wordlength:
Low for 16-bit data.
High for 20-bit
(normal) or 24-bit
I2S data.
Low for left
mono mode.
High for right
mono mode
Low to soft mute.
High for normal
operation.
Low for no
de-emphasis.
High for 44.1kHz
de-emphasis.
Low for normal filter
operation.
High for filter slow
roll-off.
Audio serial format:
Low – right justified.
High – I2S.
8X Mode
Wordlength:
Low for 20-bit data.
High for 24-bit data.
DINR
Low to soft mute.
High for normal
operation.
LRP – LRCLK
polarity select.
Unused.
Leave unconnected.
Input data format:
Low – right justified.
High – left justified.
Software
Mode
Low for
serial
interface
operation.
High for
software
mode.
Low to
soft mute.
High for
normal
operation.
Control serial
interface
data signal.
Control serial
interface
clock signal.
Control serial
interface
load signal.
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are stress ratings only. Permanent damage to the device may be caused by continuously operating at
or beyond these limits. Device functional operating limits and guaranteed performance specifications are given under Electrical
Characteristics at the test conditions specified
ESD Sensitive Device. This device is manufactured on a CMOS process. It is therefore generically susceptible
to damage from excessive static voltages. Proper ESD precautions must be taken during handling and storage
of this device.
Wolfson tests its package types according to IPC/JEDEC J-STD-020B for Moisture Sensitivity to determine acceptable storage
conditions prior to surface mount assembly. These levels are:
MSL1 = unlimited floor life at <30°C / 85% Relative Humidity. Not normally stored in moisture barrier bag.
MSL2 = out of bag storage for 1 year at <30°C / 60% Relative Humidity. Supplied in moisture barrier bag.
MSL3 = out of bag storage for 168 hours at <30°C / 60% Relative Humidity. Supplied in moisture barrier bag.
CONDITION
MIN
MAX
Supply voltage
-0.3V
+7.0V
Input
GND -0.3V
VDD + 0.3V
Operating temperature range, TA
Storage temperature prior to soldering
-25°C
+85°C
30°C max / 85% RH max
Storage temperature after soldering
-65°C
+150°C
Note: It is strongly recommended that AVDD, AVDDL and AVDDR are tied together. AGND, AGNDL and AGND right
must also be tied together.
w
PD Rev 4.0 April 2004
5
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