OPA347NA Datasheet, PDF (12/33 Pages) Texas Instruments – microPower, Rail-to-Rail Operational Amplifiers

LAND PATTERNS AND ASSEMBLY
The recommended land pattern for the OPA2347YED pack-
age is detailed in Figure 12 with specifications listed in Table
II. The maximum amount of force during assembly should be
limited to 30 grams of force per bump.
FIGURE 12. Recommended Land Area.
SOLDER PAD
DEFINITION
COPPER PAD
SOLDER MASK
OPENING
COPPER
THICKNESS
STENCIL OPENING STENCIL THICKNESS
Non-Solder Mask
Defined (NSMD)
275µm
(+0.0, –25µm)
375µm
(+0.0, –25µm)
1 oz max
275µm X 275µm, sq
125µm Thick
NOTES: (1) Circuit traces from NSMD-defined PWB lands should be less tham 100µm (preferrably = 75µm) wide in the exposed area inside the solder mask
opening. Wider trace widths will reduce device stand off and impact reliability. (2) Recommended solder paste is type 3 or type 4. (3) Best reliability results are
achieved when the PWB laminate glass transistion temperature is above the operating range of the intended application. (4) For PWB using an Ni/Au surface
finish, the gold thickness should be less than 0.5um to avoid solder embrittlement and a reduction in thermal fatigue performance. (5) Solder mask thickness
should be less than 20um on top of the copper circuit pattern. (6) Best solder stencil performance will be achieved using laser-cut stencils with electro polishing.
Use of chemically etched stencils results in inferior solder paste volume control. (7) Trace routing away from the WLCSP device should be balanced in X and
Y directions to avoid unintentional component movement due to solder wetting forces.
TABLE II. Recommended Land Pattern.
12
OPA347, 2347, 4347
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