Datasheet AD8325 (Analog Devices) - 5
| Fabricante | Analog Devices |
| Descripción | 5 V CATV Line Driver Fine Step Output Power Control |
| Páginas / Página | 16 / 5 — Typical Performance Characteristics– AD8325. VOUT = 61dBmV. @ MAX GAIN. … |
| Revisión | A |
| Formato / tamaño de archivo | PDF / 749 Kb |
| Idioma del documento | Inglés |
Typical Performance Characteristics– AD8325. VOUT = 61dBmV. @ MAX GAIN. L= 0pF. CL= 10pF. VCC. TOKO 617DB–A0070. 1:1. 0.1. CL= 20pF. VIN–
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Typical Performance Characteristics– AD8325 34 VOUT = 61dBmV C @ MAX GAIN L= 0pF 31 CL= 10pF VCC TOKO 617DB–A0070 1:1 28 0.1
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F CL= 20pF VIN– OUT– R 75 L
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CL= 50pF GAIN – dB V 165 25 IN
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AD8325 OUT+ TOKO617DB–A0070 VCC V 1:1 IN+ 0.1
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F GND V – 0.1
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F IN 22 OUT– V 165
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C 75 L RL
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IN OUT+ V + GND IN 0.1
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F 19 1 10 100 FREQUENCY – MHz
TPC 1. Basic Test Circuit TPC 4. AC Response for Various Cap Loads
0.5 –30 f = 10MHz f = 10MHz TXEN = 1 0 –34 f = 5MHz –0.5 –38 f = 42MHz –1.0 –42 GAIN ERROR – dB –1.5 –46 OUTPUT NOISE – dBmV IN 160kHz f = 65MHz –2.0 –50 0 10 20 30 40 50 60 70 80 0 8 16 24 32 40 48 56 64 72 80 GAIN CONTROL – Decimal GAIN CONTROL – Decimal
TPC 2. Gain Error vs. Gain Control TPC 5. Output Referred Noise vs. Gain Control
40 0 79D TXEN = 0 30 VIN = 31dBmV –20 20 MAX GAIN 10 46D –40 0 23D –10 GAIN – dB –60 ISOLATION – dB –20 00D MIN GAIN –30 –80 –40 –50 –100 0.1 1 10 100 1000 0.1 1 10 100 1000 FREQUENCY – MHz FREQUENCY – MHz
TPC 3. AC Response TPC 6. Isolation in Transmit Disable Mode vs. Frequency REV. A –5– 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
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F CL= 20pF VIN– OUT– R 75 L
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CL= 50pF GAIN – dB V 165 25 IN
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AD8325 OUT+ TOKO617DB–A0070 VCC V 1:1 IN+ 0.1
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F GND V – 0.1
�
F IN 22 OUT– V 165
�
C 75 L RL
�
IN OUT+ V + GND IN 0.1
�
F 19 1 10 100 FREQUENCY – MHz
TPC 1. Basic Test Circuit TPC 4. AC Response for Various Cap Loads
0.5 –30 f = 10MHz f = 10MHz TXEN = 1 0 –34 f = 5MHz –0.5 –38 f = 42MHz –1.0 –42 GAIN ERROR – dB –1.5 –46 OUTPUT NOISE – dBmV IN 160kHz f = 65MHz –2.0 –50 0 10 20 30 40 50 60 70 80 0 8 16 24 32 40 48 56 64 72 80 GAIN CONTROL – Decimal GAIN CONTROL – Decimal
TPC 2. Gain Error vs. Gain Control TPC 5. Output Referred Noise vs. Gain Control
40 0 79D TXEN = 0 30 VIN = 31dBmV –20 20 MAX GAIN 10 46D –40 0 23D –10 GAIN – dB –60 ISOLATION – dB –20 00D MIN GAIN –30 –80 –40 –50 –100 0.1 1 10 100 1000 0.1 1 10 100 1000 FREQUENCY – MHz FREQUENCY – MHz
TPC 3. AC Response TPC 6. Isolation in Transmit Disable Mode vs. Frequency REV. A –5– 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