LV2700V Sanyo Semicon Device, LV2700V Datasheet
LV2700V
Related parts for LV2700V
LV2700V Summary of contents
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... Ordering number : EN *5651 Preliminary Overview The LV2700V provides the reception and transmission functions necessary for half-duplex communication in spread-spectrum communications systems. Features • Frequency conversion is not required. (direct signal processing at 236 MHz) • Wide spread-spectrum bandwidth (20 MHz) • Sanyo developed system for PN code synchronization • ...
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... Signal-to-noise ratio [CMOS-Level Interface] Input high-level voltage Input low-level voltage Output high-level voltage Output low-level voltage Input high-level current Input low-level current Input amplitude Crystal oscillator frequency conditions Input capacitance LV2700V = 236 MHz kHz 0.2 Vp-p CC Symbol Conditions I TX TXV + V CCO CC ...
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... Block Diagram LV2700V No. 5651-3/9 ...
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... Outputs a high level when PN code 9 LOCK DET synchronization is established. (This is a CMOS-level output.) Amplifier output for demodulated output. Same as 10 CEXT The pin 8 output data is made valid by connecting V7 a capacitor between this pin and ground. LV2700V Pin function Equivalent circuit Continued on next page. No. 5651-4/9 ...
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... Output for the 9.8304 MHz reference oscillator inverter. 1/2V 21 XOUT CC Add a resistor of about 1 MΩ between XIN and XOUT. Connection for the 9.8-MHz PLL loop filter used in 22 TXLPF 1.5 transmission. LV2700V Pin function PNT1 PNT2 PN code 0 0 CODE1 0 1 CODE2 1 0 CODE3 ...
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... RXPDOUT V25 pass filter between pins 23 and 24 if required. Connection for the 236-MHz PLL loop filter used 25 RXLPF 1.5 in reception. Control input for the 236-MHz VCO. The LV2700V includes a switch for selecting the loop filter 26 LPFOUT 1.5 depending on the mode (transmission or reception ...
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... Circuit Operation and Usage Notes 1. RF amplifier block The LV2700V includes an on-chip RF amplifier that provides a gain of about 15 dB. An input sensitivity of about –100 dBm can be acquired by adding an external 25-dB RF amplifier. Since IF frequency conversion is not used, a costly IF filter is not required. While the frequencies used are selected to be values relatively infrequently used in the weak field range (under 320 MHz), out of band components must be excluded using a bandpass filter after the antenna to improve both the interference rejection characteristics and the input sensitivity ...
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... The LV2700V is designed so that good quality audio signals can be acquired by connecting an external filter between pins 23 and 24. The pin 24 output includes a buffer amplifier, thus making it a low-impedance output so that this output does not influence the pin 25 loop filter. ...
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... SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of June, 1997. Specifications and information herein are subject to change without notice. LV2700V No. 5651-9/9 ...