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TRF2443IPFP Datasheet(PDF) 10 Page - Texas Instruments |
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TRF2443IPFP Datasheet(HTML) 10 Page - Texas Instruments |
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10 / 72 page  TRANSMITTER CHARACTERISTICS TRF2443 SLWS217A – SEPTEMBER 2009 – REVISED SEPTEMBER 2009 ................................................................................................................................... www.ti.com VCC_3V = 3.3 V ± 5%, TJ = 65°C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT fIout TX output frequency 340 MHz FROM TXBBI/Q INPUTS TO TX RFOUT Pmax Maximum output power TX ATT set to 0(1) 2.5 dBm Pmin Minimum output power TX ATT set to 35 –28.5 dBm Grange Gain range Programmed by SPI 31 dB Gstep 1-dB gain step Two consecutive 1-dB steps 0.8 1.2 dB TX ATT set to 4(2) –139 –135 Nout Output noise floor dBm/Hz TX ATT set to 31(2) –166 –162 Two tones of –2.5 dBm each at TX 27.5 29.5 output(3) OIP3 Output IP3 dBm Two tones of –29.5 dBm each at TX 0.5 output(3) CS Carrier leakage Calibrated; TX ATT set to 4(4) –55 –35 dBm SBS Side-band suppression Uncalibrated(5) –50 –35 dB HD2 Second harmonic level See (1) –55 dBc HD3 Third harmonic level See (1) –50 dBc τoff TX turnoff time(6) TX_PWD: low → high; 10 100 µs TX off attenuation(7) TX_PWD = high 30 dB VCM Baseband input common-mode voltage(8) 1.4 V Parallel resistor 10 k Ω ZBBin TX differential input impedance Parallel capacitor 0.1 pF Γout Output return loss Z0 = 50 Ω (9) –12 dB POWER ALARM DETECTOR (See the Power Alarm Detector section) Detector threshold See (10) See (11) See (11) dB Response time(12) (specified by design) See (11) µs (1) Measured after the transformer (0.7-dB insertion loss) and with a TXBBI (or TXBBQ) input level of –23 dBVrms (2) No signal applied to TRF2443. This parameter is assured by characterization and is not production tested. (3) Two tones of –26 dBVrms each at TXBBI and TXBBQ inputs at 5 MHz and 8 MHz; measured at transformer output (0.7-dB insertion loss). (4) Using internal common and dc offset control (5) TXIQ_PHASE set to 8; SPI-3, register 1, B<17,13> (6) See the TX Output Power Ramp-Down section. (7) Attenuation of output level from TX on. (8) Common mode input is set internally. It is possible to disable internal bias through SPI and apply external common mode. (9) Single-ended, measured at transformer output (10) Delta output power level at TX fixed gain that forces detector output low (power alarm). (11) Detector threshold and response time are fully programmable by the user. (See the Power Alarm Detector section.) (12) If output power is lower than threshold for more than user-specified value, power-alarm detector output goes low. 10 Submit Documentation Feedback Copyright © 2009, Texas Instruments Incorporated Product Folder Link(s): TRF2443 |
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