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AS3977 数据表(PDF) 12 Page - ams AG |
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AS3977 数据表(HTML) 12 Page - ams AG |
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12 / 47 page ![]() www.austriamicrosystems.com/AS3977 Revision 3.6 12 - 47 AS3977 Data Sheet - E l e c t r i c a l C h a r a c t e r i s t i c s Table 10. Power Amplifier (865 - 870 MHz and 902 - 928 MHz Bands) Symbol Parameter Conditions Min Typ Max Units POUT Min Output Power @ 50 Ω VSUP=3V, @ 25ºC, Power depending on power setting with or without the use of the internal voltage regulator, external matching network included -20 dBm POUT Max Output Power @ 50 Ω VSUP=3V, @ 25ºC, Power depending on power setting with or without the use of the internal voltage regulator, external matching network included 4dBm POUT Output Power Variation @ 50 Ω 1 VSUP=3V, @ 25ºC, Power depending on register setting with or without the use of the internal voltage regulator, external matching network included, strong AB operation mode 2 -3.5 +3.5 dBm POUT Output Power Variation vs. VDD and Temperature @ 50 Ω VSUP=2.2…3.6V, TAMB= -40…85ºC, With the use of the internal voltage regulator, external matching network included, strong AB operation mode 2 +2.0 / -3.0 dB POUT Output Power Variation vs. Temperature @ 50 Ω VSUP=3V, TAMB=-40…85ºC, Without the use of the internal voltage regulator, external matching network included, strong AB operation mode 2 +2.0 / -3.0 dB 1. Limits by production test measurement uncertainties 2. Power line matching needs to be adjusted to VDD to ensure strong AB operation mode Table 11. Antenna Tuning Circuit Symbol Parameter Conditions Min Typ Max Units CAtmin Minimum Antenna tuning Capacitor ATCPH <3:0> = 0000 0.11 pF CAtmax Maximum Antenna tuning Capacitor ATCPH <3:0> = 1111 1.51 pF Table 12. Low Power Reset (Bit LT) Symbol Parameter Conditions Min Typ Max Units VLPR Low Power Detection Threshold Voltage Decreasing Supply Voltage 1.85 1.95 2.05 V VLPR Low Power Release Threshold Voltage Rising Supply Voltage 2.05 V Table 13. Low Supply Voltage Detector (Bit LS) Symbol Parameter Conditions Min Typ Max Units VLS Low Supply Detection Threshold Voltage Decreasing Supply Voltage 2.0 2.1 2.2 V VLS Low Supply Release Threshold Voltage Rising Supply Voltage 2.17 |
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