PLCC28-1.27 chip test socket 8Bit ADC analog-to-digital conversion chip test
1. Actual requirements:
1.Package: PLCC package
2. Number of Pins: 28
3. Number of grounding connections: 0pin
4. Chip type: ADC analog-to-digital conversion chip
5. Testing requirements: In terms of packaging, the chip has a pitch of 1.27mm, 12.57*12.57*4.57mm. It is worth noting that because the chip pins of this package are arc-shaped, the pin locations must be adjusted during production. All have certain requirements. Unreasonable production and design will cause the life of the test socket to be greatly reduced. The electrical requirements are not high, mainly 5VDC power supply, low power consumption 15mW. Due to the different signal levels between analog and digital, when making the test socket, you need to pay attention to the fact that the board has a certain shielding effect between the digital part and the analog part. , to prevent the analog part from interfering with the digital part.
2. Demand analysis: According to the above requirements, the more difficult part of the design of this chip lies in the structural design and material application. By improving the above two points, a PLCC28 test socket that matches user needs can be completed.
3. Production: After testing the appearance dimensions and other functions multiple times, after matching and tolerance adjustment, mass production can be started after confirmation;
4. Shipping requirements: After the above test socket is confirmed to be ok, it can be shipped;
