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BU-2373FV-E2 датащи(PDF) 11 Page - Rohm |
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BU-2373FV-E2 датащи(HTML) 11 Page - Rohm |
11 / 19 page Technical Note 11/18 www.rohm.com 2011.08 - Rev.B © 2011 ROHM Co., Ltd. All rights reserved. BU2373FV,BU2374FV ● Description of operations VCO Block Our VCO block consists of ring oscillators using 5-step reverse Amp. Setting the 2PIN: SELECT to “H” makes it possible to set the system to output frequency dividing mode. (The frequency is divided to 1/2 on the BU2373FV, while 1/4 on the BU2374FV.) 50% of the frequency is guaranteed even to the duty at this time. Furthermore, setting the 10Pin: VCO_INHIBIT to “H” makes it possible to set the system to power-down mode. While in power-down mode, the VCO_OUT output is fixed to “L”, thus achieving reduction in Analog consumption current approximately by 80%. In addition, through the adjustment of external resistance value for the BIAS terminal on 13Pin, the fine adjustment of output frequency can be made. (VCO I/O Characteristics) * The VCO built in the BU2373FV has been designed to provide the lowest frequency sensitivity when using the VCO_IN at about VDD/2. To make use of the VCO, it is recommended to adjust the BIAS resistance so that the voltage of the VCO_IN will reach VDD/2. (Configuration of VCO Block) Fig.52 Fig.53 VCO_IN (V) frequency (MHz) 0 It is possible to adjust center frequency with bias- resistor SELECT H VCO_INHIBIT Bias block Level Shifter 1/2 1/2 VCOIN L VCO_OUT |
Аналогичный номер детали - BU-2373FV-E2 |
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Аналогичное описание - BU-2373FV-E2 |
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