Electronic Components Datasheet Search |
|
SE5205AN Datasheet(PDF) 8 Page - NXP Semiconductors |
|
SE5205AN Datasheet(HTML) 8 Page - NXP Semiconductors |
8 / 14 page Philips Semiconductors Product specification NE/SA/SE5205A Wide-band high-frequency amplifier 1992 Feb 24 8 POWER DISSIPATION CONSIDERATIONS When using the part at elevated temperature, the engineer should con- sider the power dissipation capabilities of each package. At the nominal supply voltage of 6V, the typical supply current is 25mA (32mA Max). For operation at supply voltages other than 6V, see Figure 3 for ICC versus VCC curves. The supply current is inversely proportional to temperature and varies no more than 1mA between 25 °C and either temperature extreme. The change is 0.1% per over the range. The recommended operating temperature ranges are air-mount specifications. Better heat sinking benefits can be realized by mounting the D package body against the PC board plane. PC BOARD MOUNTING In order to realize satisfactory mounting of the NE5205A to a PC board, certain techniques need to be utilized. The board must be double-sided with copper and all pins must be soldered to their respective areas (i.e., all GND and VCC pins on the SO package). The power supply should be decoupled with a capacitor as close to the VCC pins as possible and an RF choke should be inserted between the supply and the device. Caution should be exercised in the connection of input and output pins. Standard microstrip should be observed wherever possible. There should be no solder bumps or burrs or any obstructions in the signal path to cause launching problems. The path should be as straight as possible and lead lengths as short as possible from the part to the cable connection. Another important consideration is that the input and output should be AC coupled. This is because at VCC=6V, the input is approximately at 1V while the output is at 3.1V. The output must be decoupled into a low impedance system or the DC bias on the output of the amplifier will be loaded down causing loss of output power. The easiest way to decouple the entire amplifier is by soldering a high frequency chip capacitor directly to the input and output pins of the device. This circuit is shown in Figure 18. Follow these recommendations to get the best frequency response and noise immunity. The board design is as important as the integrated circuit design itself. SCATTERING PARAMETERS The primary specifications for the NE/SA/SE5205A are listed as S-parameters. S-parameters are measurements of incident and reflected currents and voltages between the source, amplifier and load as well as transmission losses. The parameters for a two-port network are defined in Figure 19. Actual S-parameter measurements using an HP network analyzer (model 8505A) and an HP S-parameter tester (models 8503A/B) are shown in Figure 20. Values for the figures below are measured and specified in the data sheet to ease adaptation and comparison of the NE/SA/SE5205A to other high-frequency amplifiers. NE5205A VOUT VIN VCC AC COUPLING CAPACITOR RF CHOKE DECOUPLING CAPACITOR AC COUPLING CAPACITOR SR00232 Figure 18. Circuit Schematic for Coupling and Power Supply Decoupling a. Two-Port Network Defined b. S21 S12 S22 S11 POWER AVAILABLE FROM GENERATOR AT INPUT PORT POWER REFLECTED FROM INPUT PORT S11 = POWER REFLECTED FROM OUTPUT PORT POWER AVAILABLE FROM GENERATOR AT OUTPUT PORT S22 = REVERSE TRANSDUCER POWER GAIN S12 = S11 — INPUT RETURN LOSS S12 — REVERSE TRANSMISSION LOSS OSOLATION S21 — FORWARD TRANSMISSION LOSS OR INSERTION GAIN S21 = TRANSDUCER POWER GAIN S22 — OUTPUT RETURN LOSS SR00233 Figure 19. |
Similar Part No. - SE5205AN |
|
Similar Description - SE5205AN |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |