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LMX2330USLBX bảng dữ liệu(PDF) 1 Page - National Semiconductor (TI) |
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LMX2330USLBX bảng dữ liệu(HTML) 1 Page - National Semiconductor (TI) |
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1 / 42 page  LMX2330U/LMX2331U/LMX2332U PLLatinum™ Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications LMX2330U 2.5 GHz/600 MHz LMX2331U 2.0 GHz/600 MHz LMX2332U 1.2 GHz/600 MHz General Description The LMX233xU devices are high performance frequency synthesizers with integrated dual modulus prescalers. The LMX233xU devices are designed for use as RF and IF local oscillators for dual conversion radio transceivers. A 32/33 or a 64/65 prescale ratio can be selected for the 2.5 GHz LMX2330U RF synthesizer. A 64/65 or a 128/129 pres- cale ratio can be selected for both the LMX2331U and LMX2332U RF synthesizers. The IF circuitry contains an 8/9 or a 16/17 prescaler. Using a proprietary digital phase locked loop technique, the LMX233xU devices generate very stable, low noise control signals for RF and IF voltage con- trolled oscillators. Both the RF and IF synthesizers include a two-level programmable charge pump. The RF synthesizer has dedicated Fastlock circuitry. Serial data is transferred to the devices via a three-wire interface (Data, LE, Clock). Supply voltages from 2.7V to 5.5V are supported. The LMX233xU family features ultra low current consumption: LMX2330U (2.5 GHz) — 3.3 mA, LMX2331U (2.0 GHz) — 2.9 mA, LMX2332U (1.2 GHz) — 2.5 mA at 3.0V. The LMX233xU devices are available in 20-Pin TSSOP and 24-Pin CSP surface mount plastic packages. Features n Ultra Low Current Consumption n Upgrade and Compatible to LMX233xL Family n 2.7V to 5.5V Operation n Selectable Synchronous or Asynchronous Powerdown Mode: I CC-PWDN = 1 µA typical n Selectable Dual Modulus Prescaler: LMX2330U RF: 32/33 or 64/65 LMX2331U RF: 64/65 or 128/129 LMX2332U RF: 64/65 or 128/129 LMX2330U/31U/32U IF: 8/9 or 16/17 n Selectable Charge Pump TRI-STATE® Mode n Programmable Charge Pump Current Levels RF and IF: 0.95 or 3.8 mA n Selectable Fastlock™ Mode for the RF Synthesizer n Push-Pull Analog Lock Detect Output n Available in 20-Pin TSSOP and 24-Pin Chip Scale Package (CSP) Applications n Mobile Handsets (GSM, GPRS, W-CDMA, CDMA, PCS, AMPS, PDC, DCS) n Cordless Handsets (DECT, DCT) n Wireless Data n Cable TV Tuners Thin Shrink Small Outline Package (MTC20) Chip Scale Package (SLB24A) 10136680 10136681 PLLatinum™ is a trademark of National Semiconductor Corporation. July 2002 © 2002 National Semiconductor Corporation DS101366 www.national.com |
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