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March 2012

LMK00308EVM User’s Guide

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Figure 9: Bottom Side, Layer #4 (Top view, Not to scale)

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Summary of Contents for LMK00308EVM

Page 1: ...8 datasheet for the functional description and specifications 2 Features Low noise clock fan out via two banks of four differential outputs and one LVCMOS output Selectable differential output type LVPECL LVDS HCSL or Hi Z 3 1 input multiplexer with two universal input buffers and one crystal oscillator interface DIP switch control of device configuration 3 3 V core and 3 independent 3 3 V 2 5 V o...

Page 2: ...l Path and Control Switches 5 5 Power Supplies 6 5 1 Independent Output Supply Voltages 6 6 Clock Inputs 7 6 1 Configuring CLKinX for a Single Ended Input 7 7 Crystal Oscillator Interface 7 7 1 Configuring OSCin for a Single Ended Input 7 8 Clock Outputs 8 8 1 LVPECL and LVCMOS with 2 5 V Vcco 8 9 Schematics 9 10 Board Layout 12 11 Bill of Materials 16 ...

Page 3: ... Side Layer 1 Not to scale 12 Figure 7 Internal Ground Plane Layer 2 Layer Inverted Not to scale 13 Figure 8 Internal Power Plane Layer 3 Not to scale 14 Figure 9 Bottom Side Layer 4 Top view Not to scale 15 LIST OF TABLES Table 1 Default Clock Output Modes 4 Table 2 Input Selection 5 Table 3 Bank A Output Mode Selection 5 Table 4 Bank B Output Mode Selection 5 Table 5 REFout Enable Selection 5 Ta...

Page 4: ...Table 1 Default Clock Output Modes SW Position Name SW State Default Clock Output Modes S1 1 CLKoutB_Type1 OFF Bank B outputs are LVDS S1 2 CLKoutB_Type0 ON S1 3 CLKoutB_Type1 OFF Bank A outputs are LVPECL S1 4 CLKoutB_Type0 OFF S1 5 REFout_EN ON REFout CMOS enabled 2 Connect a 4 6 V power supply to VCC_EXT and GND terminals of the power block labeled J2 This powers the on board LDO regulator to s...

Page 5: ... Signal Path and Control Switches The LMK00308 supports single ended or differential clocks on CLKin0 and CLKin1 A third input OSCin has an integrated crystal oscillator interface that supports a fundamental mode AT cut crystal or an external single ended clock To achieve the maximum operating frequency and lowest additive jitter it is recommended to use a differential input clock with high slew r...

Page 6: ...upply 3 3 V Dual Direct Supplies 3 3 V 2 5 V VCC_EXT port J2 or SMA Apply 4 V 6 V Apply 4 V 5 5 V Apply 3 3 V 5 Apply 3 3 V 5 VCCO_EXT port SMA Not used Not used Not used Apply 2 5 V 5 U2 Vout Not used 3 3 V VCC VCCO Not used Not used U3 Vout 3 3 V VCC VCCO Not used Not used Not used R131 OPEN OPEN OPEN 0 R132 0 0 0 0 R134 OPEN 0 OPEN OPEN R145 OPEN 0 OPEN OPEN R153 OPEN OPEN 0 0 R155 0 OPEN OPEN ...

Page 7: ...nal with a common mode voltage of 1 65 V then 1 kohm resistors can be installed on R21 and R23 to bias CLKin0 to VCC 2 7 Crystal Oscillator Interface The LMK00308 has an integrated crystal oscillator interface OSCin OSCout that supports a fundamental mode AT cut crystal If the crystal input is selected the onboard XTAL on either footprint Y1 or Y2 will start up and the oscillator clock can be meas...

Page 8: ...REFout is a LVCMOS output and is AC coupled to its SMA connector As noted before active output traces should be properly terminated otherwise any unused output pin can be disconnected from the output trace by removing the 0 ohm series resistor 8 1 LVPECL and LVCMOS with 2 5 V Vcco The LVPECL and LVCMOS output levels depend on the output driver s respective Vcco supply as specified in the datasheet...

Page 9: ...March 2012 LMK00308EVM User s Guide 9 9 Schematics Figure 3 Schematic Sheet 1 ...

Page 10: ...10 LMK00308EVM User s Guide March 2012 Figure 4 Schematic Sheet 2 ...

Page 11: ...March 2012 LMK00308EVM User s Guide 11 Figure 5 Schematic Sheet 3 ...

Page 12: ...12 LMK00308EVM User s Guide March 2012 10 Board Layout Figure 6 Top Side Layer 1 Not to scale ...

Page 13: ...March 2012 LMK00308EVM User s Guide 13 Figure 7 Internal Ground Plane Layer 2 Layer Inverted Not to scale ...

Page 14: ...14 LMK00308EVM User s Guide March 2012 Figure 8 Internal Power Plane Layer 3 Not to scale ...

Page 15: ...March 2012 LMK00308EVM User s Guide 15 Figure 9 Bottom Side Layer 4 Top view Not to scale ...

Page 16: ...M 0 1uF 6 3V 10 X5R 0402 TDK C1005X5R0J104K 21 6 C8 C9 C16 C20 C21 C26 C27 C62 C69 CAP CERM 0 01uF 16V 10 X7R 0402 TDK C1005X7R1C103K 9 7 C18 C22 CAP CERM 33pF 50V 5 C0G NP0 0603 Kemet C0603C330J5GACTU 2 8 C63 CAP CERM 470pF 50V 10 X7R 0603 TDK C1608X7R1H471K 1 9 C70 CAP CERM 2200pF 100V 5 X7R 0603 AVX 06031C222JAT2A 1 10 C73 CAP CERM 0 01uF 25V 5 C0G NP0 0603 TDK C1608C0G1E103J 1 11 CLKin0 CLKin0...

Page 17: ...JNED 8 21 R133 R154 RES 270 ohm 5 0 1W 0603 Vishay Dale CRCW0603270RJNEA 2 22 R135 R136 R137 R140 R141 R142 R143 RES 2 0k ohm 5 0 1W 0603 Vishay Dale CRCW06032K00JNEA 7 23 R138 RES 118k ohm 1 0 1W 0603 Vishay Dale CRCW0603118KFKEA 1 24 R139 RES 150k ohm 1 0 1W 0603 Vishay Dale CRCW0603150KFKEA 1 25 R157 RES 51k ohm 5 0 1W 0603 Vishay Dale CRCW060351K0JNEA 1 26 R158 RES 2 00k ohm 1 0 1W 0603 Vishay...

Page 18: ...ription Manufacturer Part Number Qty 38 R10 R11 R12 R13 R14 R15 R16 R17 DNP 0 39 R19 R118 R124 R130 DNP 0 40 R21 R23 R25 R26 R29 R30 R32 R35 R39 R40 DNP 0 41 R43 R44 DNP 0 42 R131 R134 R145 R153 DNP 0 43 R146 R147 R148 R149 R150 R151 R152 DNP 0 44 Y2 DNP 0 ...

Page 19: ...ency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC or ICES 003 rules which are designed to provide reasonable protection against radio frequency interference Operation of the equipment may cause interference with radio communications in which case the user at his own expense will be required to take whatever measures may be required t...

Page 20: ...o interference to other users the antenna type and its gain should be so chosen that the equivalent isotropically radiated power e i r p is not more than that necessary for successful communication This radio transmitter has been approved by Industry Canada to operate with the antenna types listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna t...

Page 21: ...ct to this product or 3 Use of this product only after you obtained the Technical Regulations Conformity Certification as provided in Radio Law of Japan with respect to this product Also please do not transfer this product unless you give the same notice above to the transferee Please note that if you could not follow the instructions above you will be subject to penalties of Radio Law of Japan Te...

Page 22: ... damage personal injury or death If there are questions concerning these ratings please contact a TI field representative prior to connecting interface electronics including input power and intended loads Any loads applied outside of the specified output range may result in unintended and or inaccurate operation and or possible permanent damage to the EVM and or interface electronics Please consul...

Page 23: ...NOTES ...

Page 24: ...siness practice TI is not responsible or liable for any such statements TI products are not authorized 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 necess...

Page 25: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments LMK00308EVM NOPB ...

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