GP214D Datasheet, PDF (10/15 Pages) List of Unclassifed Manufacturers – 1.4GHz DUAL PLL

TEST CIRCUIT
GP214D
1.4GHz DUAL PLL
▪ Sensitivity measurement
- RF signal input is to be matched to 50Ohm and short line is recommended.
- R1 and R2 (51Ohm) are connected to GND.
- Tests at different bias and power levels are normally conducted.
- Turn on DC voltage and RF signal before the data programming.
- Frequency is monitored from TP1 (test point, 1) via frequency counter or oscilloscope.
▪ Charge pump current measurement
- VCP can be fixed to 1/2 VCC or varied from 0 to maximum VCC.
- Charge pump polarity is changed from normal to reverse.
Version 1.2 (Jan. 2006)
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GAINTECH INCORPORATED