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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TH71221 датащи(PDF) 30 Page - Melexis Microelectronic Systems |
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TH71221 датащи(HTML) 30 Page - Melexis Microelectronic Systems |
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30 / 44 page  TH71221 27 to 930MHz FSK/FM/ASK Transceiver 39010 071221 Page 30 of 44 Data Sheet Rev. 005 June/07 6.6 AC Characteristics of the Transmitter Part all parameters under normal operating conditions, unless otherwise stated; typical values at Ta = 23 °C and VCC = 3 V; all parameters based on test circuits for FSK (Fig. 14 to 15) and ASK (Fig. 16 to 17), respectively; Parameter Symbol Condition Min Typ Max Unit fRF= 433.92MHz -7 Output power fRF= 868.3MHz P1 mode = transmit, RPS = see para. 7.3 TXPOWER = 00 -10 dBm fRF= 433.92MHz 1 Output power fRF= 868.3MHz P2 mode = transmit, RPS = see para. 7.3 TXPOWER = 01 -2 dBm fRF= 433.92MHz 6 Output power fRF= 868.3MHz P3 mode = transmit, RPS = see para. 7.3 TXPOWER = 10 3 dBm fRF= 433.92MHz 10 Output power fRF= 868.3MHz P4 mode = transmit, RPS = see para. 7.3 TXPOWER = 11 9 dBm FSK deviation ΔfFSK depends on Cx1, Cx2 and crystal parameters ±2.5 ±25 ±80 kHz FM deviation ΔfFM please refer to the FM circuit in the cookbook ±6 kHz Modulation frequency FM fmod 10 kHz PLL reference spurious emission Pspur_PLL -40 dBm Harmonic emission Pharm -36 dBm Start-up time ton_TX From standby to transmit mode 1 1.5 ms 6.7 Serial Control Interface Parameter Symbol Condition Min Max Unit SDTA to SCLK set up time tCS 150 ns SCLK to SDTA hold time tCH 50 ns SCLK pulse width low tCWL 100 ns SCLK pulse width high tCWH 100 ns SCLK to SDEN set up time tES 100 ns SDEN pulse width tEW 100 ns SDEN to SCLK hold time tEH 100 ns 6.8 Crystal Parameters Parameter Symbol Condition Min Max Unit Crystal frequency fcrystal fundamental mode, AT 3 12 MHz Load capacitance Cload 10 15 pF Static capacitance C0 5 pF Equivalent series resistance R1 180 Ω Spurious response aspur only required for FSK -10 dB |
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