WM7230
Preliminary Technical Data
REVISION HISTORY
DATE
REV
ORIGINATOR
CHANGES
20/10/10
1.0/2.0
PH
Front page description and features re-worded.
Description of LRSEL pin updated.
Electrical Characteristics re-ordered, and terminology updated.
Microphone interface timing drawing and descriptions updated.
Frequency response graph added.
Illustration of recommended external components replaced with text.
Connection to Wolfson CODEC text and illustration updated.
Recommended PCB land patterns moved to Applications Information.
26/10/10
23/11/10
1.0/2.0
JMacD
CST
Package Diagram DM089.D added
Specification of FSR corrected.
Specification for THD corrected
Time to data valid changed to minimum
Grammatical errors
28/01/11
01/05/11
2.0
2.1
JMacD
JMacD
Reel quantity added to order information
Updated the LRSEL pin description , Timing diagram and notes for the rising and
falling clock edges.
Sleep mode current updated to 2uA
Updated the reel quantity
Updated the start up time
Updated the new freq response and THD curves
Updated +3dB frequency cut off
Updated VDD to 1.64V
Package Diagram updated to DM089.E.
06/09/11
16/12/11
2.1
2.2
JMacD
References and dimension letters changed to be consistent with all mems
package diagrams.
Lid dimensions updated.
Swapped dimensions L and E.
Added marking area boundary
Introduced E variant with sensitivity +/-1dB
Added E variant ordering info
KC
Added voltage range digital input
Updated the CODEC to WM8994
Added Reference to WAN_0273
Dynamic Range added, p5
22/06/12
08/10/12
2.3
2.4
MR/JMacD
JMacD
Active mode current changed to 700uA, p1 and p5
CLK cycle time min and max updated, p6
Package Diagram updated to DM089F
Optimised System RF Design added.
PTD, Rev 2.4, October 2012
12
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
