LMX2331A National Semiconductor, LMX2331A Datasheet
LMX2331A
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LMX2331A Summary of contents
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... LMX233xA via a three wire interface (Data, Enable, Clock). Supply voltage can range from 2.7V to 5.5V. The LMX233xA family features very low current LMX2330A — 3V, LMX2331A — 3V, LMX2332A — 3V. Functional Block Diagram TRI-STATE ® registered trademark of National Semiconductor Corporation. Fastlock ™ ...
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... Connection Diagram Order Number LMX2330ATM, LMX2331ATM or LMX2332ATM Pin Description Pin Pin I/O No. Name — Power supply voltage input for RF analog and RF digital circuits. Input may range from 2. 5.5V pin and be connected directly to the ground plane — Power Supply for RF charge pump. Must be ...
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... Input may range from 2.7V to 5.5V close as possible to this pin and be connected directly to the ground plane. Block Diagram Notes: The RF prescaler for the LMX2331A/32A is either 64/65 or 128/129, while the prescaler for the LMX2330A is 32/33 or 64/65 supplies power to the RF prescaler, N-counter, R-counter and phase detector ...
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... Recommended Operating Conditions Power Supply Voltage −0.3V to +6. −0.3V to +6. Operating Temperature (T −0. +0.3V CC −65˚C to +150˚C Conditions LMX2330A 2.7V to 5.5V CC LMX2330A RF Only LMX2331A LMX2331A RF Only LMX2332A LMX2332A RF Only LMX233XA IF Only LMX2330A LMX2331A LMX2332A LMX233XA 2.7V to 5.5V CC OSC in ...
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Charge Pump Characteristics < < = 3.0V 3.0V; −40˚ 85˚C, except as specified Symbol Parameter I Charge Pump Output Current D o -SOURCE -SINK -SOURCE I D ...
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Charge Pump Current Specification Definitions sink current − sink current sink current ...
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... Typical Performance Characteristics LMX2330A LMX2332A Charge Pump Current vs D Voltage o = HIGH LMX2331A DS012331-31 I TRI-STATE Voltage o DS012331-33 Charge Pump Current LOW I CP DS012331-34 7 DS012331-32 DS012331-4 Voltage DS012331-35 www.national.com ...
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Typical Performance Characteristics Charge Pump Current Variation (See Note 3 under Charge Pump Current Specification Definitions) RF Input Impedance = 2.7V to 5.5V MHz to 3 GHz Marker GHz, Real = ...
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... Typical Performance Characteristics LMX2330A RF Sensitivity vs Frequency LMX2332A RF Sensitivity vs Frequency Oscillator Input Sensitivity vs Frequency (Continued) LMX2331A RF Sensitivity vs Frequency DS012331-40 IF Input Sensitivity vs Frequency DS012331-42 DS012331-44 9 DS012331-41 DS012331-43 www.national.com ...
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Functional Description The simplified block diagram below shows the 22-bit data register, two 15-bit R Counters and the 15- and 18-bit N Counters (in- termediate latches are not shown). The data stream is clocked (on the rising edge of Clock) ...
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... X = DON’T CARE condition • • • • LMX2331A/32A 128) 11 DS012331- • ...
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Functional Description Detector Polarity 0 1 Detector Polarity Phase Detector Polarity 0 Negative 1 Positive LOW current state = 1 Note 6: The I CPo CPo Note 7: Activation of the IF PLL or ...
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Functional Description (Continued) PHASE DETECTOR POLARITY Depending upon VCO characteristics, R16 bit should be set accordingly: (see figure right) When VCO characteristics are positive like (1), R16 should be set HIGH; When VCO characteristics are negative like (2), R16 should ...
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Typical Application Example Operational Notes: * VCO is assumed AC coupled increases impedance so that VCO output power is provided to the load rather than the PLL. Typical values are 200 depending on the VCO ...
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Application Information A block diagram of the basic phase locked loop is shown in Figure 1 . FIGURE 1. Basic Charge Pump Phase Locked Loop LOOP GAIN EQUATIONS A linear control system model of the phase feedback for a PLL ...
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Application Information FASTLOCK CIRCUIT IMPLEMENTATION A diagram of the Fastlock scheme as implemented in Na- tional Semiconductors LMX233xA PLL is shown in Figure 5 . When a new frequency is loaded, and the RF Icp high the charge pump circuit ...
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... Wide) Thin Shrink Small Outline Package (TM) Order Number LMX2330ATM, LMX2331ATM or LMX2332ATM Order Number LMX2330ATMX, LMX2331ATMX or LMX2332ATMX LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION ...