TEMPERATURE COMPENSATED AMPLIFIERS AFS SERIES In any solid state amplifier, both the gain and the noise figure will vary as a function of temperature. The overall gain of an uncompensated amplifier tends to decrease as the base plate temperature increases, while the noise figure will exhibit the opposite effect and increase as the temperature rises. The amount of change in gain is directly proportional to the number of stages in the device, the operating frequency, and the way the individual stages have been biased. In order to reduce this variation, it is often necessary to temperature compensate the amplifier. AFS4-02001800-45-TC-5 TYPICAL DATA GAIN VS. TEMPERATURE 40 GAIN (dB) 38 36 34 +85C -54C +25C 32 30 2 4 6 12 8 10 FREQUENCY (GHz) 14 16 MODEL NUMBER FREQUENCY RANGE (GHz) GAIN WINDOW (dB) AFS2-01000200-15-TC-6 AFS3-01000200-15-TC-6 1-2 1-2 25-29 36-40 AFS2-02000400-15-TC-6 AFS3-02000400-15-TC-6 2-4 2-4 AFS2-04000800-20-TC-2 AFS3-04000800-18-TC-4 18 GAIN FLATNESS (dB, Max.) NOISE FIGURE (dB, Max.) VSWR IN/OUT (Max.) OUTPUT POWER @ 1 dB COMP. (dBm, Min.) NOM. DC POWER (15 V, mA) OUTLINE DRAWING 1 1 1.5 1.5 2:1 2:1 5 5 125 125 6 6 22-26 26-30 1 1 1.5 1.5 2:1 2:1 5 5 125 125 6 6 4-8 4-8 17-22 25-30 1 1 2 1.8 2:1 2:1 5 8 70 100 2 4 AFS2-02000800-40-TC-2 AFS3-02000800-30-TC-4 AFS4-02000800-26-TC-4 2-8 2-8 2-8 14-19 22-27 30-36 1.5 1.5 1.5 4 3 2.6 2:1 2:1 2:1 5 8 8 70 150 120 2 4 4 AFS2-08001200-30-TC-2 AFS3-08001200-22-TC-4 AFS4-08001200-20-TC-4 8-12 8-12 8-12 12-16 24-28 30-34 1 1 1 3 2.2 2 2:1 2:1 2:1 5 8 8 70 100 150 2 4 4 AFS4-12001800-30-TC-8 AFS6-12001800-30-TC-8 12-18 12-18 22-26 28-32 1 1 3 3 2:1 2:1 8 8 250 400 8 8 AFS4-08001800-35-TC-8 AFS6-08001800-35-TC-8 8-18 8-18 22-26 30-34 1 1 3.5 3.5 2:1 2:1 8 8 250 400 8 8 AFS4-06001800-35-TC-8 AFS6-06001800-35-TC-8 6-18 6-18 22-26 30-34 1 1 3.5 3.5 2:1 2:1 8 8 250 400 8 8 AFS4-02001800-45-TC-5 AFS5-02001800-45-TC-6 2-18 2-18 18-24 22-28 1.5 1.5 4.5 4.5 2.2:1 2.2:1 8 8 120 175 5 6 NOTES: All specifications guaranteed -54 to +85C. Please contact the factory for other frequencies, noise figures, and gain options. See page 59 for outline. 39