SLUAAI3 January   2022 TPS62810-Q1 , TPS62811-Q1 , TPS62812-Q1 , TPS62813-Q1 , TPS62816-Q1 , TPS628501 , TPS628501-Q1 , TPS628502 , TPS628502-Q1 , TPS628503 , TPS628503-Q1 , TPS628510 , TPS628511 , TPS628512 , TPS62870 , TPS62870-Q1 , TPS62871 , TPS62871-Q1 , TPS62872 , TPS62872-Q1 , TPS62873 , TPS62873-Q1 , TPS62874-Q1 , TPS62875-Q1 , TPS62876-Q1 , TPS62877-Q1 , TPS62A01 , TPS62A01A , TPS62A02 , TPS62A02A , TPS62A06 , TPS62A06A , TPSM82810 , TPSM82813 , TPSM8287A06 , TPSM8287A10 , TPSM8287A12 , TPSM8287A15

 

  1.   Trademarks
  2. 1Introduction
  3. 22-Port Shunt-Through Measurement Theory
  4. 3System Setup and Calibration Elements
  5. 42-Port Shunt-Through Measurement of the TPS62A01 Output PDN
  6. 5PDN Impedance Measurement Example
  7. 6Summary
  8. 7References

4 2-Port Shunt-Through Measurement of the TPS62A01 Output PDN

Figure 4-1 shows an Application Circuit to perform a two-port shunt-through measurement, the TPS62A01 Output PDN is evaluated.

Figure 4-1 2-Port Shunt-Through Measurement of the TPS62A01 Output PDN

The VNA Output (TX) is connected to the output PDN through a direct connection. The VNA Input (RX) is connected to the output of the PDN through a semi-floating differential amplifier on the VNA RX side.

Residual impedance will directly affect very low impedance measurements. Thus, making sure connections length are kept as short as possible will ensure a better fit to actual PDN behavior over frequency. Ensuring tight connections also helps reducing parasitic coupling effects and allow more accurate results.