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HSMS-2860 Datasheet(PDF) 11 Page - AVAGO TECHNOLOGIES LIMITED |
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HSMS-2860 Datasheet(HTML) 11 Page - AVAGO TECHNOLOGIES LIMITED |
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11 / 18 page  11 Figure 25. Output Voltage vs. Temperature and Bias Current in the 915 MHz Voltage Doubler using the HSMS-286C. in a single package, such as the SOT‑143 HSMS‑2865 as shown in Figure 29. In high power differential detectors, RF coupling from the detector diode to the reference diode produces a rectified voltage in the latter, resulting in errors. Isolation between the two diodes can be obtained by using the HSMS‑286K diode with leads 2 and 5 grounded. The difference between this product and the conventional HSMS‑2865 can be seen in Figure 29. -55 -35 -15 5 85 45 65 TEMPERATURE ( °C) 25 40 80 60 120 100 INPUT POWER = –30 dBm 3.0 µA 1.0 µA 10 µA 0.5 µA TEMPERATURE ( °C) 5 15 35 25 INPUT POWER = –30 dBm 3.0 µA 10 µA 1.0 µA 0.5 µA -55 -35 -15 5 85 45 65 25 matching network differential amplifier bias to differential amplifier Vs detector diode reference diode PA HSMS-2865 Figure 26. Output Voltage vs. Temperature and Bias Current in the 5.80 GHz Voltage Detector using the HSMS-286B Schottky. Six Lead Circuits The differential detector is often used to provide temper‑ ature compensation for a Schottky detector, as shown in Figures 27 and 28. Figure 27. Differential Detector. Figure 28. Conventional Differential Detector. These circuits depend upon the use of two diodes having matched Vf characteristics over all operating temperatures. This is best achieved by using two diodes HSMS-2865 SOT-143 HSMS-286K SOT-363 3 4 6 5 4 1 1 2 2 3 to differential amplifier Vs detector diode reference diode PA HSMS-286K -35 -25 -15 -5 15 5 37 dB 47 dB INPUT POWER (dBm) 0.5 1000 100 10 1 5000 Frequency = 900 MHz HSMS-2825 ref. diode RF diode Vout Square law response HSMS-282K ref. diode Figure 29. Comparing Two Diodes. The HSMS‑286K, with leads 2 and 5 grounded, offers some isolation from RF coupling between the diodes. This product is used in a differential detector as shown in Figure 30. Figure 30. High Isolation Differential Detector. In order to achieve the maximum isolation, the designer must take care to minimize the distance from leads 2 and 5 and their respective ground via holes. Tests were run on the HSMS‑282K and the conventional HSMS‑2825 pair, which compare with each other in the same way as the HSMS‑2865 and HSMS‑286K, with the results shown in Figure 31. Figure 31. Comparing HSMS-282K with HSMS-2825. |
Similar Part No. - HSMS-2860 |
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Similar Description - HSMS-2860 |
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