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MC13851 bảng dữ liệu(PDF) 4 Page - Freescale Semiconductor, Inc |
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MC13851 bảng dữ liệu(HTML) 4 Page - Freescale Semiconductor, Inc |
4 / 34 page Electrical Specifications MC13851 Advance Information, Rev. 2.0 4 Freescale Semiconductor Table 3 shows the use of the Gain and Enable pins to select Active mode (High Gain), Bypass mode (Low Gain) or Standby mode (Disable) operation. Table 4 lists the electrical characteristics associated with noise performance measured in a 50 Ω system. Additional noise parameters are listed in Table 15 and Table 16. Also listed are the typical Icc and RF turn on times for the device. Information and details on the boards are shown in Section 4, “Printed Circuit and Bill of Materials.” Logic voltage Input high voltage Input low voltage —1.25 0 1.8 0 VCC 0.80 Vdc Vdc Table 3. Truth Table Pin Function Pin Name Enable Disable Low Gain High Gain Low Gain High Gain Logic Circuit Bias Vcc Vcc 1 1 1 1 Toggles Gain Mode (Active or Bypass) Gain 0 1 0 1 Toggles LNA On/Off Enable 1 1 0 0 Notes: 1. Logic state 1 equals Vcc voltage. Logic state of 0 equals ground potential. 2. Vcc is inductively coupled to LNA Out pin and Vcc pin 3. Minimum logic state 1 for enable and gain pins is 1.25V 4. Maximum logic state 0 for enable and gain pins is 0.8V Table 4. Electrical Characteristics (Vcc = 2.75 V, Ta = 25°C) Characteristic Symbol Min Typ Max Unit Insertion Gain |S21|2 dB R1=1.2 k Ω, Freq=1.575 GHz 17.4 18.9 — R1=1.2 k Ω, Freq=2.14 GHz 14.5 16 — R1=1.5 k Ω, Freq=1.575 GHz 16.4 17.9 — R1=1.5 k Ω, Freq=2.14 GHz 14.9 16.4 — Maximum Stable Gain and/or Maximum Available Gain [Note1] MSG, MAG dB R1=1.2 k Ω, Freq=1.575 GHz 21.1 22.6 — R1=1.2 k Ω, Freq=2.14 GHz 19.6 21.1 — R1=1.5 k Ω, Freq=1.575 GHz 19 20.5 — R1=1.5 k Ω, Freq=2.14 GHz 18.1 19.6 — Minimum Noise Figure NFmin dB R1=1.2 k Ω, Freq=1.575 GHz — 0.97 1.3 R1=1.2 k Ω, Freq=2.14 GHz — 1.07 1.4 R1=1.5 k Ω, Freq=1.575 GHz — 0.98 1.3 R1=1.5 k Ω, Freq=2.14 GHz — 1.1 1.4 Table 2. Recommended Operating Conditions (continued) Characteristic Symbol Min Typ Max Unit |
Số phần tương tự - MC13851 |
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Mô tả tương tự - MC13851 |
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