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AD8328ARQ-REEL 数据表(PDF) 10 Page - Analog Devices |
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AD8328ARQ-REEL 数据表(HTML) 10 Page - Analog Devices |
10 / 16 page REV. 0 –10– AD8328 Table II. Common Matching Resistors Differential Input Termination ZIN ( Ω) R2/R3 R4 ( Ω)R1/R17 50 Open 51.1 Open/Open 75 Open 78.7 Open/Open 100 Open 107.0 Open/Open 150 Open 165.0 Open/Open Single-Ended Input Termination ZIN ( Ω) R2/R3 R4 ( Ω)R1/R17 50 0 Ω/0 Ω Open 53.6 Ω/25.5 Ω 75 0 Ω/0 Ω Open 82.5 Ω/39.2 Ω Overshoot on PC Printer Ports The data lines on some PC parallel printer ports have excessive overshoot that may cause communications problems when pre- sented to the CLK pin of the AD8328. The evaluation board was designed to accommodate a series resistor and shunt capacitor (R2 and C5 in Figure 11) to filter the CLK signal if required. Installing Visual Basic Control Software Install the CabDrive_28 software by running the setup.exe file on disk one of the AD8328 evaluation software. Follow the on-screen directions and insert disk two when prompted. Choose installation directory and then select the icon in the upper left to complete the installation. Running AD8328 Software To load the control software, go to START, PROGRAMS, CABDRIVE_28 or select the AD8328.exe file from the installed directory. Once loaded, select the proper parallel port to com- municate with the AD8328 (Figure 9). Figure 9. Parallel Port Selection Controlling Gain/Attenuation of the AD8328 The slide bar controls the gain/attenuation of the AD8328, which is displayed in dB and in V/V. The gain scales 1 dB per LSB. The gain code from the position of the slide bar is displayed in decimal, binary, and hexadecimal (Figure 10). - Figure 10. Control Software Interface Transmit Enable and Sleep Mode The Transmit Enable and Transmit Disable buttons select the mode of operation of the AD8328 by asserting logic levels on the asynchronous TXEN pin. The Transmit Disable button applies Logic 0 to the TXEN pin, disabling forward transmission. The Transmit Enable button applies Logic 1 to the TXEN pin, enabling the AD8328 for forward transmission. Checking the Enable SLEEP Mode checkbox applies Logic 0 to the asynchronous SLEEP pin, setting the AD8328 for SLEEP mode. Memory Functions The Memory section of the software provides a way to alternate between two gain settings. The X->M1 button stores the current value of the gain slide bar into memory, while the RM1 button recalls the stored value, returning the gain slide bar to the stored level. The same applies to the X->M2 and RM2 buttons. |
类似零件编号 - AD8328ARQ-REEL |
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类似说明 - AD8328ARQ-REEL |
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