4.1.5.1 PA Power and Current Consumption versus Temperature and Supply

The following figure and Figure 4-15 show the measured output power and current consumption behavior at fRF = 433.92 MHz and POUT = 6 dBm matching the over temperature and supply voltage variation shown in Table 3-43.

Figure 4-16 and Figure 4-16 summarize the temperature and supply voltage variation measured output power and current consumption behavior at fRF = 433.92 MHz and POUT = 14 dBm matching what is shown in Table 3-43.

The output power is only slightly dependent on temperature. The output matching Table 3-43 is optimized for the supply voltage VS_PA = 3V. Varying the supply voltage, thus, has an impact on the current consumption and output power because the impedance of the external circuit remains constant but the amplitude on the RFOUT pin changes with the supply voltage. The behavior at fRF = 315 MHz is comparable to fRF = 433.92 MHz except for slightly lower power consumption (see parameters no. 10.50, 10.90 and 11.30 in RF Transmit Characteristics).

Figure 4-14. Output Power Versus Temperature and Supply (fRF = 433.92 MHz, POUT = 6 dBm)
Figure 4-15. Current Consumption Versus Temperature and Supply (fRF = 433.92 MHz, POUT = 6 dBm)
Figure 4-16. Output Power Versus Temperature and Supply (fRF = 433.92 MHz, POUT = 14 dBm)
Figure 4-17. Current Consumption Versus Temperature and Supply (fRF = 433.92 MHz, POUT = 14 dBm)

The following figure and Figure 4-19 show the measured output power and current consumption behavior at fRF = 868.3 MHz and POUT = 6 dBm matching the overtemperature and supply voltage variation in Table 3-43.

The behavior at fRF = 868 MHz is comparable to fRF = 433.92 MHz except for the higher power consumption (see parameters no. 10.50, 10.90 and 11.30 in RF Transmit Characteristics).

Figure 4-18. Output Power Versus Temperature and Supply (fRF = 868.3 MHz, POUT = 6 dBm)
Figure 4-19. Current Consumption Versus Temperature and Supply (fRF = 868.3 MHz, POUT = 6 dBm)