Datasheet AD8325 (Analog Devices) - 6

AD8325 –55 180 170 –60 V BmV @ MAX GAIN OUT = 62d 160 TXEN = 0 V
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OUT = 61dBmV @ MAX GAIN 150 TXEN = 1 –65 TOKO 617DB–A0070 V 140 OUT = 60dBmV @ MAX GAIN 1:1 VCC 0.1 IMPEDANCE –
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F DISTORTION – dBc VIN– 130 OUT– –70 ZIN 165
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R 75
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OUT+ L VIN+ 120 0.1
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F VOUT = 59dBmV @ MAX GAIN GND –75 110 5 15 25 35 45 55 65 1 10 100 FUNDAMENTAL FREQUENCY – MHz FREQUENCY – MHz
TPC 7. Second Order Harmonic Distortion vs. Frequency TPC 10. Input Impedance vs. Frequency for Various Output Levels
–50 90 VOUT = 62dBmV @ MAX GAIN –52 85 VOUT = 61dBmV @ MAX GAIN –54 80
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TXEN = 1 –56 75 –58 70 IMPEDANCE – DISTORTION – dBc TXEN = 0 –60 65 VOUT = 60dBmV @ MAX GAIN –62 60 VOUT = 59dBmV @ MAX GAIN –64 55 5 15 25 35 45 55 65 1 10 100 FUNDAMENTAL FREQUENCY – MHz FREQUENCY – MHz
TPC 8. Third Order Harmonic Distortion vs. Frequency for TPC 11. Output Impedance vs. Frequency Various Output Levels
–10 –50 CH PWR 12.3dBm FO = 42MHz –20 ACP UP –54.02dB VOUT = 61dBmV @ MAX GAIN ACP LOW –53.79dB –55 –30 HD3 –40 –60 –50 –65 –60 –70 DISTORTION – dBc –70 –80 –90 CU1 –75 CU1 C0 HD2 –100 C0 C11 C11 –80 –110 0 10 20 30 40 50 60 70 80 CENTER 21MHz 75kHz/DIV SPAN 750kHz GAIN CONTROL – Dec Code
TPC 9. Harmonic Distortion vs. Gain Control TPC 12. Adjacent Channel Power –6– REV. A Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS LOGIC INPUTS TIMING REQUIREMENTS ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDERING GUIDE PIN FUNCTION DESCRIPTIONS Typical Performance Characteristics APPLICATIONS General Application Operational Description SPI Programming and Gain Adjustment Input Bias, Impedance, and Termination Output Bias, Impedance, and Termination Power Supply Decoupling, Grounding, and Layout Considerations Initial Power-Up Between Burst Operation Distortion, Adjacent Channel Power, and DOCSIS Noise and DOCSIS Evaluation Board Features and Operation Overshoot on PC Printer Ports Transformer and Diplexer Differential Inputs Single-Ended-to-Differential Input Differential Input Installing the Visual Basic Control Software Running the Software Controlling the Gain/Attenuation of the AD8325 Transmit Enable, Transmit Disable, and Sleep Memory Section EVALUATION BOARD FEATURES AND OPERATION EVALUATION BOARD BILL OF MATERIALS OUTLINE DIMENSIONS Revision History