LMX25313010EVAL National Semiconductor, LMX25313010EVAL Datasheet - Page 31

• Manufacturer Part Number: LMX25313010EVAL
• Description: BOARD EVAL FOR LMX25131LQ 3010
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LMX25313010EVAL

• Main Purpose: Timing, Frequency Synthesizer
• Embedded: No
• Utilized Ic / Part: LMX2531LQ3010
• Primary Attributes: Low Band 1455 - 1566 MHz, High Band 2910 - 3132 MHz
• Secondary Attributes: 2.8 V ~ 3.2 V Supply
• Silicon Manufacturer: National
• Silicon Core Number: LMX2531
• Kit Application Type: Clock & Timing
• Application Sub Type: Frequency Synthesizer
• Kit Contents: Board, Cable, CD
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

2.8 REGISTER R7
2.8.1 XTLDIV[1:0] -- Division Ratio for the Crystal Frequency
The frequency provided to the VCO frequency calibration circuitry is based on the OSCin frequency divided down by a factor,
determined by the XTLDIV word. Note that this division ratio is independent of the R counter value or the phase detector frequency.
The necessary division ratio depends on the OSCin frequency and is shown in the table below:
2.8.2 XTLMAN[11:0] -- Manual Crystal Mode
XTLMAN must be programmed if word XTLSEL (2.7.8) is set to manual crystal mode. In the table below, the proper value for
XTLMAN is shown based on some common OSCin frequencies (f
XTLMAN can be calculated as 16 × f
can be found in the Kbit table (below).
LMX2531LQ1146E
LMX2531LQ1226E
LMX2531LQ1312E
LMX2531LQ1415E
LMX1531LQ1515E
LMX2531LQ1570E
LMX2531LQ1650E
LMX2531LQ1700E
LMX2531LQ1778E
LMX2531LQ1910E
LMX2531LQ2265E
LMX2531LQ2080E
LMX2531LQ2570E
LMX2531LQ2820E
LMX2531LQ3010E
LMX2531LQ1742
Device
XTLDIV
0
1
2
3
LMX2531LQ1146E
LMX2531LQ1226E
LMX2531LQ1312E
LMX2531LQ1415E
LMX2531LQ1515E
LMX2531LQ1570E
LMX2531LQ1650E
LMX2531LQ1700E
LMX2531LQ1778E
LMX2531LQ1910E
LMX2531LQ2265E
LMX25311742
Device
5 MHz
53
53
47
47
40
38
38
35
32
31
27
20
18
13
11
10
OSCin
XTLMAN Values for Common OSCin Frequencies
Kbit Values for Various LMX2531 options
/ Kbit. f
10 MHz
107
107
OSCin
94
94
80
76
76
70
64
62
53
40
36
27
23
20
Crystal Division Ratio
is expressed in MHz and Kbit values for the LMX2531 frequency options
Divide by 2
Divide by 4
Divide by 8
Reserved
31
20 MHz
OSCin
213
213
188
188
160
152
152
139
128
123
107
80
71
53
46
40
) and various LMX2531 options. For any OSCin frequency
f
OSCin
30.72 MHz
327
327
289
289
246
234
234
214
197
189
164
123
109
82
70
61
Kbit
1.5
1.5
1.7
1.7
2.1
2.1
2.3
2.5
2.6
2
3
4
61.44 MHz
Crystal Range
655
655
578
578
492
468
468
427
393
378
328
246
218
164
140
123
20-40 MHz
Reserved
< 20 MHz
> 40 MHz
76.8 MHz
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819
819
722
722
614
585
585
534
492
473
410
307
273
205
178
154