LMX2371TMX National Semiconductor, LMX2371TMX Datasheet - Page 20

• Manufacturer Part Number: LMX2371TMX
• Description: IC FREQ SYNTH DUAL 20-TSSOP
• Manufacturer: National Semiconductor
• Series: PLLatinum™r
• Type: PLL Frequency Synthesizerr

Specifications of LMX2371TMX

• Pll: Yes with Bypass
• Input: CMOS, TTL
• Output: CMOS
• Number Of Circuits: 1
• Ratio - Input:output: 3:1
• Differential - Input:output: Yes/No
• Frequency - Max: 2GHz, 1.2GHz
• Divider/multiplier: Yes/No
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP
• Frequency-max: 2GHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LMX2371TMX

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Typical Application Example
Operational Notes:
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Proper use of grounds and bypass capacitors is essential to achieve a high level of performance. Crosstalk between pins can be reduced by careful board
layout.
This is an electrostatic sensitive device. It should be handled only at static free work stations.
VCO is assumed AC coupled.
R
200
50
CMOS clock is used and no terminating resistor is required. OSC
mended because the input circuit provides its own bias. (See Figure below)
Adding RC filters to the V
IN
increases impedance so that VCO output power is provided to the load rather than the PLL. Typical values are 10 to
termination is often used on test boards to allow use of external reference oscillator. For most typical products a
depending on the VCO power level. f
CC
line is recommended to reduce loop-to-loop noise coupling.
IN
RF impedance ranges from 40
20
in
DS101026-37
may be AC or DC coupled. AC coupling is recom-
to 100 . f
IN
IF impedances are higher.
DS101026-36