LMX2355TM datasheet(6/23 Pages) NSC

Part #	LMX2355TM

Description	PLLatinum Fractional N RF/ Integer N IF Dual Low Power Frequency Synthesizer

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Manufacturer	NSC [National Semiconductor (TI)]

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Charge Pump Current Specification Definitions

20004823

I1 = CP sink current at VDo =Vp − ∆V

I2 = CP sink current at VDo = Vp/2

I3 = CP sink current at VDo = ∆V

I4 = CP source current at VDo =Vp − ∆V

I5 = CP source current at VDo = Vp/2

I6 = CP source current at VDo = ∆V

∆V = Voltage offset from positive and negative rails. Dependent on VCO tuning range relative to VCC and ground. Typical values are between 0.5V and 1.0V.

Note 4: IDo vs VDo = Charge Pump Output Current magnitude variation vs Voltage = [1⁄2 * {||1| − ||3|}]/[1⁄2 * {||1| + ||3|}] * 100% and [1⁄2 * {||4| − ||6|}]/[1⁄2 * {||4| +

||6|}] * 100%

Note 5: IDo-sink vs IDo-source = Charge Pump Output Current Sink vs Source Mismatch = [||2| − ||5|]/[1⁄2 * {||2| + ||5|}] * 100%

Note 6: IDo vs TA = Charge Pump Output Current magnitude variation vs Temperature = [||2 @ temp| − ||2 @ 25˚C|]/||2 @ 25˚C| * 100% and [||5 @ temp| − ||5 @

25˚C|]/||5 @ 25˚C| * 100%

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