National Semiconductor LMX2531LQ1700E Скачать руководство пользователя страница 4 | Manualshive

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L M X 2 5 3 1 L Q 1 7 0 0 E E V A L U A T I O N B O A R D O P E R A T I N G I N S T R U C T I O N S

Phase Noise

Output Frequency = 1716 M

H

z

Internal Di

vide by 2 Disabled (DIV2=0)

Output Frequency = 858 MHz

Internal Di

vide by 2 Enabled (DIV2=1)

4

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Содержание LMX2531LQ1700E

Страница 1: ...00E Evaluation Board Operating Instructions National Semiconductor Corporation Wireless Communications RF Products Group 2900 Semiconductor Dr M S A2 600 Santa Clara CA 95052 8090 LMX2531LQ1700EFPEB Rev 1 20 2006 ...

Страница 2: ...ASE NOISE WITH NARROW LOOP FILTER INTERNAL DIVIDE BY 2 DISABLED 5 PHASE NOISE WITH NARROW LOOP FILTER INTERNAL DIVIDE BY 2 ENABLED 6 SPURS INTERNAL DIVIDE BY 2 DISABLED 7 SPURS INTERNAL DIVIDE BY 2 ENABLED 8 CODELOADER SETTINGS 9 SCHEMATIC 11 BILL OF MATERIALS 12 TOP LAYER 13 MID LAYER 1 GROUND PLANE 14 MID LAYER 2 POWER 15 BOTTOM LAYER SIGNAL 16 TOP BUILD DIAGRAM 17 2 ...

Страница 3: ... port By means of MICROWIRETM serial port emulation the CodeLoader software included can be run on a PC to facilitate the LMX2531LQ1700E internal register programming for the evaluation and measurement In addition to this cable assembly there is a microwire buffer board that ensures that the proper voltage levels are provided to the microwire inputs and also this reduces digital noise from compute...

Страница 4: ...1 7 0 0 E E V A L U A T I O N B O A R D O P E R A T I N G I N S T R U C T I O N S Phase Noise Output Frequency 1716 MHz Internal Divide by 2 Disabled DIV2 0 Output Frequency 858 MHz Internal Divide by 2 Enabled DIV2 1 4 ...

Страница 5: ...se plots a 20 Hz loop bandwidth was used with the E5052 spectrum analyzer This is the most accurate and state of the art equipment A measurements are more accurate because the impact of the PLL is removed At higher offsets the measurements are also more accurate because the E5052 spectrum analyzer has a much lower noise floor than the E4445A spectrum analyzer Even though the E4445A has a noise can...

Страница 6: ... plots a 20 Hz loop bandwidth was used with the E5052 spectrum analyzer This is the most accurate and state of the art equipment A measurements are more accurate because the impact of the PLL is removed At higher offsets the measurements are also more accurate because the E5052 spectrum analyzer has a much lower noise floor than the E4445A spectrum analyzer Even though the E4445A has a noise cance...

Страница 7: ...d Spur at 200 kHz offset at a worst case frequency of 1630 2 MHz is 85 6 dBc Worst case channels occur at exactly one channel spacing above or below a multiple of the crystal frequency Spur at 200 kHz offset at a worst case frequency of 1700 2 MHz is 85 6 dBc Spur at 200 kHz offset at a worst case frequency of 1760 2 MHz is 87 3 dBc 7 ...

Страница 8: ...ode uses the divide by 2 mode the channel spacing here is actually 100 kHz The spur at 100 kHz could be eliminated by doubling the channel spacing before the divider The reason that the spur at 200 kHz is shown is to illustrate the theoretical 6 dB impact of the divider Spur at 200 kHz offset for a frequency of 850 1 MHz is better than 94 6 dBc Spur at 200 kHz offset for a frequency of 870 1 MHz i...

Страница 9: ...he default reference oscillator used for these instructions was 10 MHz but there is a mode for a 61 44 MHz oscillator as well If the bits become scrambled their original state may be recalled by choosing the appropriate mode Note that if the internal divide by 2 is enabled the VCO frequency still reflects the VCO frequency before the divide by 2 9 ...

Страница 10: ... in the correct way R5 INIT1 and R5 INIT 2 are just the R5 register being used to properly initialize the part So a single CNT L should load the part The port setup tells CodeLoader what information goes where If this is wrong the part will not program Although LPT1 is usually correct CodeLoader does not autodetect the correct port On some laptops it may be LPT3 10 ...

Страница 11: ... C1 R2 C12 C2 R3 C3 C17 R4 C9 C4 R5 C5 OSCin C13 C18 C20 R7 R23 R22 Ftest LD C15 C22 R1 R9 TRIGGE R GND 1 2 3 4 5 6 7 8 POWER C24 C14 C11 C19 C21 C23 Notethat AnyComponent w ithDesignator 100or HigherisontheBottomSideof theBoard C10 VccDIG 1 NC 2 GND 3 NC 4 NC 5 VregBUF 6 NC 7 DATA 8 CLK 9 LE 10 CE 11 NC 12 NC 13 NC 14 NC 15 VccVCO 16 Vr egVCO 17 Vr ef VCO 18 GND 19 GND 20 Fout 21 VccBUF 22 Vtune ...

Страница 12: ... Panasonic P 22AHCT ND 603 10 0 1W Thick Film 0 22Ω R22 R23 12 2 Vishay CRCW06033R3JRT1 603 5 0 1W Thick Film 3 3Ω R1 R18 13 4 Vishay CRCW0603100JRT1 603 5 0 1W Thick Film 10Ω R2 R3 R4 R5 14 1 Vishay CRCW0603510JRT1 603 5 0 1W Thick Film 51Ω R6 15 4 Vishay CRCW0603103JRT1 603 5 0 1W Thick Film 10KΩ R9 R11 R13 R15 16 5 Vishay CRCW0603123JRT1 603 5 0 1W Thick Film 12KΩ R2pLF R10 R12 R14 R16 17 1 Vis...

Страница 13: ...L M X 2 5 3 1 L Q 1 7 0 0 E E V A L U A T I O N B O A R D O P E R A T I N G I N S T R U C T I O N S Top Layer 13 ...

Страница 14: ...L M X 2 5 3 1 L Q 1 7 0 0 E E V A L U A T I O N B O A R D O P E R A T I N G I N S T R U C T I O N S Mid Layer 1 Ground Plane 15 Mils Down FR4 14 ...

Страница 15: ...L M X 2 5 3 1 L Q 1 7 0 0 E E V A L U A T I O N B O A R D O P E R A T I N G I N S T R U C T I O N S Mid Layer 2 Power 15 ...

Страница 16: ...L M X 2 5 3 1 L Q 1 7 0 0 E E V A L U A T I O N B O A R D O P E R A T I N G I N S T R U C T I O N S Bottom Layer Signal Note Total Board Thickness 61 mils 16 ...

Страница 17: ...L M X 2 5 3 1 L Q 1 7 0 0 E E V A L U A T I O N B O A R D O P E R A T I N G I N S T R U C T I O N S 17 Top Build Diagram ...

Страница 18: ...for use in safety critical applications such as life support where a failure of the TI product would reasonably be expected to cause severe personal injury or death unless officers of the parties have executed an agreement specifically governing such use Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications and acknowledge and agre...

Страница 19: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments LMX25311700EVAL ...

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