SNAA390 july   2023 LMK6C , LMK6D , LMK6H , LMK6P

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Test Standards and Test Setup
    1. 2.1 Test Standards
    2. 2.2 Test Setup in Vibration Lab
  6. 3Sinusoidal Vibration, Random Vibration, and Mechanical Shock Tests
    1. 3.1 Sinusoidal Vibration Test
      1. 3.1.1 Procedure for Sinusoidal Vibration Test
      2. 3.1.2 Results From Sinusoidal Vibration Test
    2. 3.2 Random Vibration Test
      1. 3.2.1 Procedure for Random Vibration Test
      2. 3.2.2 Results From Random Vibration Test
    3. 3.3 Mechanical Shock Test
      1. 3.3.1 Procedure for Mechanical Shock Test
      2. 3.3.2 Results From Mechanical Shock Test
  7. 4Comparison of BAW Oscillator Vibration Performance With Crystal Oscillator
    1. 4.1 Comparison Test Setup
    2. 4.2 Comparison Test Results
  8. 5Summary
  9. 6References

3.3.1 Procedure for Mechanical Shock Test

For the mechanical shock test, the MIL-STD-883F Method 2002, Condition A profile (500 g acceleration) and Condition B profile (1500 g acceleration) is used.

For this sinusoidal vibration test, the following variants are selected.

  • LVCMOS Output: DLE-4 (3.2 x 2.5 mm), DLF-4 (2.5 x 2.0 mm)
  • Differential Output: DLE-6 (3.2 x 2.5 mm), DLF-6 (2.5 x 2.0 mm)

The following are the steps involved in setting up the Device Under Test (DUT) board on the vibration fixture and for conducting the mechanical shock test.

  • Parts are soldered down on the LMK6x evaluation module (EVM) and bolted to the mating plate, which is connected to the mechanical shock testing machine.
  • The Agilent E3631A bench-top power supply is setup to supply 3.3 V for the EVM module.
  • For differential outputs (DLE-6 and DLF-6 package devices), the LVPECL output termination is provided on the EVM. A TC1-1-13MA+ Balun surface mount RF transformer is used to convert the differential output to a single-ended output and the output is connected to a Keysight E5052B phase noise analyzer.
  • Shock parameters are set as below
    • For 1500 g, board is vertically lifted 10.4 inches.
    • For 500 g, board is vertically lifted 3.8 inches.
    • Air suction pulls fixture down to achieve appropriate g-force.
  • At least 3 cycles of shock are performed for each tested sample.
  • Transient data is acquired during shock test.
  • Phase noise data is collected as a screenshot after shock test

The shock test fixture setup is in Figure 3-19, which shows the mounted LMK6x EVM.

GUID-20230626-SS0I-HL3P-L4FT-QLF9N9KT6KTX-low.jpg Figure 3-19 Shock Test Setup