LMX25312820EVAL National Semiconductor, LMX25312820EVAL Datasheet - Page 16

• Manufacturer Part Number: LMX25312820EVAL
• Description: BOARD EVAL FOR LMX2531LQ 2820
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LMX25312820EVAL

• Main Purpose: Timing, Frequency Synthesizer
• Embedded: No
• Utilized Ic / Part: LMX2531LQ2820
• Primary Attributes: Low Band 1355 - 1462 MHz, High Band 2710 - 2925 MHz
• Secondary Attributes: 2.8 V ~ 3.2 V Supply
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Serial Data Timing Diagram
20101103
The DATA is clocked into a shift register on each rising edge of the CLK signal. On the rising edge of the LE signal, the data is
sent from the shift registers to an actual counter. A slew rate of at least 30 V/μs is recommended for these signals. After the
programming is complete, the CLK, DATA, and LE signals should be returned to a low state. Although it is strongly recommended
to keep LE low after programming, LE can be kept high if bit R5[23] is changed to 0 (from its default value of 1). If this bit is changed,
then the operation of the part is not guaranteed because it is not tested under these conditions. If the CLK and DATA lines are
toggled while the in VCO is in lock, as is sometimes the case when these lines are shared with other parts, the phase noise may
be degraded during the time of this programming.
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