TQ5121 TriQuint Semiconductor, TQ5121 Datasheet
TQ5121
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TQ5121 Summary of contents
Page 1
... GND 8 Product Description The TQ5121 is a 3V, RF receiver IC designed specifically for Cellular band TDMA applications. It’ performance meets the requirements of products designed to the IS-136 and AMPS standards. The TQ5121 is pin compatible with TQ9222, which enables handset designers to use strategic board platform strategy. The TQ5121 contains LNA+Mixer circuits to handle the 800MHz cellular band ...
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... TQ5121 Data Sheet Electrical Characteristics Parameter Conditions RF Frequency Cellular band LO Frequency Cellular band IF Frequency Cellular band LO input level Supply voltage Gain Gain Variation vs. Temp. -40 to 85C Noise Figure Input 3 rd Order Intercept Return Loss LNA input – external match LNA output ...
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... Vdd=2.8v -8 Vdd=3.0v -8.5 -9 -9.5 -10 -10.5 -11 85 -40 4 3.75 3.5 3.25 3 +25C 2.75 -40C 2.5 +85C 2.25 2 869 872 3 3.1 3.2 TQ5121 Data Sheet IIP3 vs. Vdd vs. Temp -40C +25C +85C 2.7 2.8 2.9 3 3.1 3.2 Vdd (volts) IIP3 vs. Temp vs. Vdd Vdd=2.7 Vdd=2.8 Vdd=3 Temp C Noise Figure vs. Freq vs. Temp -40C +25C +85C 875 878 881 884 887 ...
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... TQ5121 Data Sheet Application/Test Circuit Vdd MXR 800 800 Bill of Material for TQ5121 Receiver Application/Test Circuit Component Reference Designator Receiver IC U1 Capacitor C1 Capacitor C2, C3 Capacitor C4 Capacitor C5 Capacitor C6 Inductor L1, L2 Inductor L3 Inductor Lx (filter dependent) Toyocom (select For additional information and latest specifications, see our website: www.triquint.com ...
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... Designing the input matching network involves a compromise between optimum noise performance and best input return loss. For example, when the TQ5121 LNA is matched for optimum noise figure (1.35dB @ 880 MHz), the input return loss is approximately 4dB. On the other hand, when the LNA is matched for best return loss, the LNA noise figure is approximately 1 ...
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... This series inductor also smoothes out excessive ripple in the filter passband improving the overall performance of the circuit. Mixer The mixer of the TQ5121 is implemented by a common source depletion FET. The mixer is designed to operate on supply voltages from 3V to 5V. An on-chip buffer amplifier simplifies direct connection of the LO input to a commercial VCO at drive levels down to -7dBm ...
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... The frequency response of the LO driver amplifier can be measured using a semi-rigid probe (see Fig. 5) and a network analyzer. Connect port 1 to the LO input (Pin 4) of the TQ5121 with the source power set to deliver -7 dBm. Connect the coaxial probe to Port 2 and place the probe tip approximately 0.1 inch away from either Pin 3 or the inductor ...
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... TQ5121 Data Sheet Mixer IF Port The Mixer IF output is an "open-drain" configuration, allowing for flexibility in efficient matching to various filter types and at various IF frequencies. For evaluation of the LNA and mixer usually necessary to impedance match the IF port to the 50 test systems. When verifying or adjusting the matching circuit on the prototype circuit ...
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... Mixer IF output. Open drain output, connection to Vdd required. External matching is required. N connection Optional 16 Optional ground GND For additional information and latest specifications, see our website: www.triquint.com Optional 16 1 GND 2 15 N/C Mixer IF Vdd 4 13 GND 12 5 MXR RF 6 GND 11 LNA 10 7 Out 9 N/C 8 TQ5121 Data Sheet 9 ...
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... TQ5121 Data Sheet Package Type: Power QSOP-16 Plastic Package e DESIGNATION NOTES: A. THE D DIMENSION DOES NOT INCLUDE MOLD FLASHING AND MISMATCH. MOLD FLASHING AND MISMATCH SHALL NOT EXCEED .006 in (.15 mm) PER SIDE. B. THE E1 DIMENSION DOES NOT INCLUDE MOLD FLASHING AND MISMATCH. MOLD FLASHING AND MISMATCH SHALL NOT EXCEED .010 in (.25 mm) PER SIDE ...