SAW FILTER

HDF778A

S4

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3.5 Test Circuit

4. ENVIRONMENTAL CHARACTERISTICS

4-1 Temperature cycling

Subject the device to a low temperature of -45℃ for 30 minutes. Following by a

high temperature of +25℃ for 5 Minutes and a higher temperature of +85℃ for 30

Minutes. Then release the device into the room conditions for 1 to 2 hours prior to the

measurement. It shall meet the specifications in 3.3.

4-2 Resistance to solder heat

Submerge the device terminals into the solder bath at 260℃±5℃ for 10±1 sec.

Then release the device into the room conditions for 4 hours. It shall meet the specifications

in 3.3.

4-3 Solderability

Submerge the device terminals into the solder bath at 245℃ ±5℃ for 5s, More than

95% area of the soldering pad must be covered with new solder. It shall meet the

specifications in 3.3.

4-4 Mechanical shock

Drop the device randomly onto the concrete floor from the height of 1 m 3 times. the

filter shall fulfill the specifications in 3.3.

4-5 Vibration

Subject the device to the vibration for 2 hour each in x,y and z axes with the

amplitude of 1.5

mm at 10 to 55 hz. The filter shall fulfill the specifications in 3.3.