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ML13146FTA Datasheet(PDF) 7 Page - LANSDALE Semiconductor Inc. |
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ML13146FTA Datasheet(HTML) 7 Page - LANSDALE Semiconductor Inc. |
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7 / 15 page  www.lansdale.com Page 7 of 15 Issue 0 Mixer/Buffer Input The Mixer/Buf In pin is a broadband, 50 Ω input used to drive the IF port of the mixer (see Table 2, S11parameters). The Mixer/Buf In pin can be used in one of three modes: 1. A IF signal can be applied to this pin and up–converted to the desired RF frequency. 2. A resistor can be connected to ground, controlling the RF output power. 3. A resistor can be connected to VCC, disabling the entire mixer. The linear gain of the Mixer/Buf when used as a buffer is approximately –5.0 to –8.0 dB. Mixer/Buffer Outputs The mixer outputs (Mixer/Buf Out + and Mixer/Buf Out –) are balanced, open collector. A shunt resistor of 200 Ω mini- mum to VCC is recommended for stability. The outputs can be used as a single–ended driver or con- nected in a balanced–to–unbalanced configuration. If the sin- gle–ended driver configuration is used, the unused output must be tied directly to VCC. For the balanced–to–unbalanced con- figuration, an additional 3.0 to 6.0 dB of power gain can be achieved. Conjugate matching is easily accomplished to the desired load by the addition of a shunt and series element (see Table 2, S22 parameters). Low Power Amplifier (LPA) The LPA is internally biased at low supply current (approxi- mately 2.0 mA emitter current) for optimal low power opera- tion, yielding a 10 dBm 1.0 dB output power compression point. Input and output matching may be achieved at various frequencies using few external components (see Table 3 S–parameters). Typical power gain is 16 dB with the input/out- put conjugately matched to the source/load impedance. A mini- mum 200 Ω shunt resistor from the output to VCC is recom- mended for stability. LANSDALE Semiconductor, Inc. ML13146 |
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