WM7220

Preliminary Technical Data

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PTD, Rev 2.3, December 2011

12

REVISION HISTORY

DATE

REV

ORIGINATOR

CHANGES

14/5/09

1.0

03/03/10

1.1

21/10/10

2.0

27/1/11

2.1

PH

Top Port’ added to device title

Degrees symbol corrected in Ordering Information

ENL abbreviation deleted from Electrical Characteristics

Acoustic and Electrical Characteristics terminology updated

Decoupling capacitor requirement described in ‘Connection to a Wolfson Audio

CODEC’ section

21/2/11

2.1

KC

Updated the front page package height.

Updated the LRSEL description, timing diagram and notes for the rising and

falling edge of CLK signal with respect to LRSEL.

Updated the input capacitance

Updated the start up timing,

Updated the acoustic and electrical characteristic (+3dB frequency response,

acoustic noise floor, PSR to –ve value)

Updated sleep mode current typical value 2uA

Updated the frequency response curve and THD

29/06/11

2.2

KC

Updated figure 3 with elongated pin 6

05/12/11

2.3

KC

Introduced E variant with sensitivity tolerance +/- 1dB

Added E variant ordering info.

Added voltage range digital input

Updated CODEC to WM8994

Added reference to WAN_0273.