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AM55-0004RTR Folha de dados(PDF) 6 Page - Tyco Electronics |
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AM55-0004RTR Folha de dados(HTML) 6 Page - Tyco Electronics |
6 / 8 page External Circuitry Label Value Purpose C1 - C5 1000 pF Low frequency bypass C6 - C8 68 pF RF bypass C9 1.5 pF Output power tuning C10 15 pF Reduces low frequency gain R1 2.7 k Ω Voltage divider to V G2 R2 1.5 k Ω Voltage divider to V G2 R3 150 Ω Reduces low frequency gain Tline 0.250 in. long Power match 250 mW Linear Power Amplifier and T/R Switch AM55-0004 Specifications Subject to Change Without Notice V 2.00 M/A-COM Inc. s 1011 Pawtucket Boulevard, Lowell, MA 01853 USA s Telephone: 800-366-2266 6 Recommended PCB Configuration Layout View Cross-Section View External Circuitry Parts List All off-chip components are low-cost surface mount components obtainable from multiple sources. (0.020 in. x 0.040 in. or 0.030 in. x 0.050 in.) V DD1 C8 C5 VSW Tx IN Rx OUT ANT IN/OUT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 C4 Save Tx VSW R2 R1 C1 C6 VDD2 V G2 VG1 C9 PA OUT C10 C2 PA IN C3 C7 R3 TLine The PCB dielectric between RF traces and RF ground layers should be chosen to reduce RF discontinuities between 50- Ω lines and package pins. M/A-COM recommends an FR-4 dielectric thickness of 0.008 in. (0.2 mm), yielding a 50- Ω line width of 0.015 in. (0.38 mm). The recommended metalization thickness is 1 oz. copper. Shaded traces are vias to DC routing layer and traces on DC routing layer. Biasing Procedure The AM55-0004 requires that V GG bias be applied prior to any V DD bias. Permanent damage may occur if this procedure is not followed. All FETs in the PA will draw excessive current and damage internal circuitry. RF Traces + Components RF Ground DC Routing Customer Defined C1 C6 C9 C2 C10 C7 R2 R1 R3 C3 C4 C5 C8 0.700 in. 0.490 in. Pin 1 |
Nº de peça semelhante - AM55-0004RTR |
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Descrição semelhante - AM55-0004RTR |
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