Production Data WM8781
w
PD, January 2012, Rev 4.5
5
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 <30C / 85% Relative Humidity. Not normally stored in moisture barrier bag.
MSL2 = out of bag storage for 1 year at <30C / 60% Relative Humidity. Supplied in moisture barrier bag.
MSL3 = out of bag storage for 168 hours at <30C / 60% Relative Humidity. Supplied in moisture barrier bag.
The Moisture Sensitivity Level for each package type is specified in Ordering Information.
CONDITION MIN MAX
Digital supply voltage
-0.3V +4.5V
Analogue supply voltage
-0.3V +7V
Voltage range digital inputs
DGND -0.3V DVDD + 0.3V
Voltage range analogue inputs
AGND -0.3V AVDD +0.3V
Ambient temperature (supplies applied)
-55
o
C +125
o
C
Storage temperature after soldering
-65C +150C
Pb free package body temperature (reflow 10 seconds)
+260
o
C
Package body temperature (soldering 2 minutes)
+183
o
C
Notes
1. Analogue and digital grounds must always be within 0.3V of each other.
THERMAL PERFORMANCE
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
SSOP-20 package
Thermal resistance – junction to
ambient
R
θJA
81
See note 1
°C/W
Notes:
1. Figure given for package mounted on 4-layer FR4 according to JESD51-7. (No forced air flow is assumed).
2. Thermal performance figures are estimated.
RECOMMENDED OPERATING CONDITIONS
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Digital supply range
DVDD 2.7 3.6 V
Analogue supply range
AVDD 2.7 5.5 V
Ground
DGND,AGND 0 V
Operating temperature range
T
A
-25C +85C V
Notes
1. Digital supply DVDD must never be more than 0.3V greater than AVDD.
