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LLCC68 Datasheet(PDF) 19 Page - Semtech Corporation |
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LLCC68 Datasheet(HTML) 19 Page - Semtech Corporation |
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19 / 106 page  LLCC68 Data Sheet Rev. 1.0 DS.LLCC68.W.APP July 2019 19 of 106 Semtech www.semtech.com 3.5.3 Receive Mode Specifications IDDTCXO Current consumption of the TCXO regulator Quiescent current Relative to load current - - - 1 70 2 A % ATCXO Amplitude voltage for external TCXO applied to XTA pin provided through a 220 resistor in series with a 10 pF capacitance See Section 4.1.4 "TCXO Control Block" on page 24 0.4 0.6 1.2 Vpk-pk 1. Phase Noise specifications are given for the recommended PLL BW to be used for the specific modulation/BR, optimized settings may be used for specific applications 2. Phase Noise is not constant over frequency, due to the topology of the PLL, for two frequencies close to each other, the phase noise could change significantly 3. Wake-up time till crystal oscillator frequency is within +/- 10 ppm 4. OSC_TRIM is the available trimming range to compensate for crystal initial frequency error and to allow crystal temperature compensation implementation; the total available trimming range is higher and allows the compensation for all IC process variations 5. Maximum bit rate is assumed to scale with the RF frequency; for example 300 kb/s in the 869/915 MHz frequency bands and only 50 kb/s at 150 MHz 6. For RF frequencies below 400 MHz, there is a scaling between the frequency and supported BW, some BW may not be available below 400 MHz 7. LoRa BW = 125 kHz 8. LoRa BW = 250 kHz 9. LoRa BW = 500 kHz Table 3-8: Receive Mode Specifications Symbol Description Conditions Min Typ Max Unit RXS_2FB Sensitivity 2-FSK, RX Boosted gain, see Section 9.6 "Receive (RX) Mode" on page 53, split RF paths for Rx and Tx, RF switch insertion loss excluded BR_F = 0.6 kb/s, FDA = 0.8 kHz, BW_F = 4 kHz BR_F = 1.2 kb/s, FDA = 5 kHz, BW_F = 20 kHz BR_F = 4.8 kb/s, FDA = 5 kHz, BW_F = 20 kHz BR_F = 38.4 kb/s, FDA = 40 kHz, BW_F = 160 kHz BR_F = 250 kb/s, FDA = 125 kHz, BW_F = 500 kHz - - - - - -125 -123 -118 -109 -104 - - - - - dBm dBm dBm dBm dBm RXS_LB Sensitivity LoRa®, Rx Boosted gain, see Section 9.6 "Receive (RX) Mode" on page 53, split RF paths for Rx and Tx, RF switch insertion loss excluded BW_L = 125 kHz, SF = 7 BW_L = 125 kHz, SF = 9 BW_L = 250 kHz, SF = 7 BW_L = 250 kHz, SF = 10 BW_L = 500 kHz, SF = 7 BW_L = 500 kHz, SF = 11 - - - - - - -124 -129 -121 -129 -117 -127 - - - - - - dBm dBm dBm dBm dBm dBm RXS_2F Sensitivity 2-FSK Rx Power Saving gain with direct tie connection between Rx and Tx BR_F = 4.8 kb/s, FDA = 5 kHz, BW_F = 20 kHz - -115 - dBm RXS_L Sensitivity LoRa® Rx Power Saving gain with direct tie connection between Rx and Tx BW_L = 125 kHz, SF = 9 - -125 - dBm Table 3-7: General Specifications Symbol Description Conditions Min Typ Max Unit |
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