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Physical Description

Figure 3. Component Side

SLAU206B – September 2007 – Revised April 2008

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Summary of Contents for ADS61 Series

Page 1: ...ADS61xx and ADS61B23EVM User s Guide Literature Number SLAU206B September 2007 Revised April 2008 ...

Page 2: ...2 SLAU206B September 2007 Revised April 2008 Submit Documentation Feedback ...

Page 3: ...g Up the EVM for ADC SPI Control 11 3 3 Using the TI ADC SPI Interface Software 11 4 Connecting to FPGA Platforms 13 4 1 TSW1100 13 4 2 TSW1200 13 5 ADC Evaluation 14 5 1 Hardware Selection 14 5 2 Coherent Input Frequency Selection 15 6 Physical Description 16 6 1 PCB Layout 16 6 2 Bill of Materials 21 6 3 EVM Schematics 23 Important Notices 29 SLAU206B September 2007 Revised April 2008 Table of C...

Page 4: ...EVM Schematic Sheet 2 24 9 EVM Schematic Sheet 3 25 10 EVM Schematic Sheet 4 26 11 EVM Schematic Sheet 5 27 12 Breakout Board Schematic Sheet 6 28 List of Tables 1 Breakout Board Pin Assignments 8 2 Jumpers 9 3 Surface Mount Jumpers 9 4 ADS61xx Frequently Used Registers 12 5 Bill of Materials 21 4 List of Figures SLAU206B September 2007 Revised April 2008 Submit Documentation Feedback ...

Page 5: ...hort time The quick start procedure uses the default conditions of the EVM as shipped from the factory In addition the quick start guide configures the ADC in a CMOS offset binary data format Users who have modified the board may find the quick start procedure to be ineffective 1 Supply 3 3 V to J11 while connecting the return to a shorted J11 and J14 Power on the device 2 Confirm jumper J6 is sho...

Page 6: ...t be dc biased which is accomplished by using the ADC VCM output The input is provided by the SMA connector J8 Using SMA input J10 users can evaluate the ADC using a THS4509 amplifier which converts a single ended input into a differential signal while providing 10 dB of signal gain Users should enable the amplifier path by connecting JP7 1 2 and by shorting positions 2 3 on both surface mount jum...

Page 7: ...3 jitter performance makes this a valid clocking solution only for input frequencies in the first Nyquist zone as jitter degrades SNR for frequencies much above the first Nyquist zone To use this path change jumper JP8 to short 1 2 and JP2 JP3 and JP4 to short pins 2 3 The ADS61xx ADS61B23 ADC parallel digital outputs are brought to J10 a high density Samtec connector Several options are available...

Page 8: ...D 20 Data bit 5 Data bit 7 21 GND GND 22 Data bit 6 Data bit 8 23 GND GND 24 Data bit 7 Data bit 9 25 GND GND 26 Data bit 8 Data bit 10 27 GND GND 28 Data bit 9 Data bit 11 29 GND GND 30 Data bit 10 Data bit 12 31 GND GND 32 Data bit 11 MSB Data bit 13 MSB 33 GND GND 34 NC NC 35 GND GND 36 NC NC 37 GND GND 38 NC NC 39 GND GND 40 NC NC The EVM features several jumpers whose functions are described ...

Page 9: ...M controlled 2 3 USB or FPGA controlled Table 3 Surface Mount Jumpers Description Reference Designator Default Selection Optional Selection JP1 Probe point for CDCP1803 output Clock input path selection JP2 1 2 transformer coupled path 2 3 CDCP1803 path Clock input path selection JP3 1 2 transformer coupled path 2 3 CDCP1803 path Clock input path selection JP4 1 2 transformer coupled path 2 3 CDCP...

Page 10: ...ftware can be installed on a personal computer by running the setup exe file located on the CD This file installs the graphical user interface GUI along with the USB drivers needed to communicate to the USB port that resides on the EVM After the software is installed and the USB cable has been plugged in for the first time the user is prompted to complete the installation of the USB drivers When p...

Page 11: ...ed with the patterns sent to the ADC The default inputs to both the Address Byte s and Data Byte s fields are hex inputs as designated by the small x in the control Users can change the default input style by clicking on the x to binary decimal octal or hex Multiple register writes can be written simply by changing the contents of the Address Byte s and Data Byte s field and pressing Enter again F...

Page 12: ...lternate Value ADS61xx Reset 2s Complement Straight Binary CMOS DDR LVDS Powerdown OFF Powerdown On No Course Gain 3 5 dB Course Gain INT Reference EXT Reference Bit Wise LVDS Only Byte Wise Test Mode None Multiple Options 12 SLAU206B September 2007 Revised April 2008 Submit Documentation Feedback ...

Page 13: ...TSW1100 represents a load greater than 5 pF and as such users should consider boosting the CMOS drive strength by using the TI SPI Control software In many cases the boosting of the drive strength is not required to perform valid data captures when using the TSW1100 this is an optional step The ADS61xx ADS61B23 natively plugs into the TSW1200 FPGA platform In most circumstances the TSW1200 functio...

Page 14: ...n that of the ADC under evaluation the ADC digitizes the performance of the source Noise can be broken into two components broadband noise and close in phase noise Broadband noise can be improved by the LC filter added to improve distortion performance however the close in phase noise typically cannot be improved by additional filtering Therefore when selecting an analog signal source it is import...

Page 15: ...to the ADC is carefully chosen such that when a continuous time signal is reconstructed from a finite sample set no time domain discontinuities exist To achieve this the input frequency must be an integer multiple of the ratio of the ADC sample rate fs and the number of samples collected from the logic analyzer Ns The ratio of fs to Ns is typically referred to as the fundamental frequency ff Deter...

Page 16: ...onstructed on a four layer 0 062 inch thick PCB using FR 4 material The individual layers are shown in Figure 2 through Figure 6 The layout features a split ground plane however similar performance can be obtained with careful layout using a common ground plane Figure 2 Top Silkscreen 16 SLAU206B September 2007 Revised April 2008 Submit Documentation Feedback ...

Page 17: ...www ti com Physical Description Figure 3 Component Side SLAU206B September 2007 Revised April 2008 17 Submit Documentation Feedback ...

Page 18: ...Physical Description www ti com Figure 4 Ground Plane 1 18 SLAU206B September 2007 Revised April 2008 Submit Documentation Feedback ...

Page 19: ...www ti com Physical Description Figure 5 Power Plane 1 SLAU206B September 2007 Revised April 2008 19 Submit Documentation Feedback ...

Page 20: ...Physical Description www ti com Figure 6 Bottom Side 20 SLAU206B September 2007 Revised April 2008 Submit Documentation Feedback ...

Page 21: ... 1 J6 HMTSW 103 07 G S 240 HDR_THVT_1x3_100_M HMTSW 103 07 G S 240 Samtec 1 J5 SMD3P_BRIDGE Short pin smd_bridge_0603 NO PART 1 and 2 with 0 Ω 3 J8 J9 J15 SMA SMA_THVT_320x320 142 0701 201 Johnson Components 1 J10 CONN_QTH_30X2 D A conn_QTH_30X2 D A QTH 060 02 F D A Samtec 4 J11 J13 J16 J20 RED Banana Jack ST 351A ALLIED ELECTRONICS 2 J12 J14 BLK Banana Jack ST 351B ALLIED ELECTRONICS 1 J17 CONN U...

Page 22: ... 2 R58 R60 130 Ω 603 ERJ 3EKF1300V Panasonic 2 R59 R61 82 5 Ω 603 ERJ 3EKF82R5V Panasonic 1 R65 0 Ω 1206 ERJ S080R00V Panasonic 1 SW1 SW PUSHBUTTON SW_RESET_PTS635 PTS635SL43 C K Switch 3 TP1 TP3 TP6 Test Point Black testpoint 5001 Keystone 3 TP2 TP4 TP5 Test Point White testpoint 5002 Keystone 0 TP7 TP9 Not T POINT R TESTPOINT 5002 Keystone installed 2 T1 T2 TC4 1W XFMR_TC4 1W TC4 1W Mini Circuit...

Page 23: ... 0 OHM R39 69 8 R39 69 8 R32 10 1 16W 1 R32 10 1 16W 1 JP7 JP7 1 3 2 U11 THS4509 U11 THS4509 NC 1 VIN 2 CM1 4 VS 5 VS 6 VOUT 3 VS 7 VS 8 CM2 9 VOUT 10 VIN 11 PD 12 VS 13 VS 14 VS 15 VS 16 PAD 17 R24 39 1 10W 1 R24 39 1 10W 1 R40 100 R40 100 T2 TC4 1W T2 TC4 1W 3 2 1 6 5 4 M S A D E N J15 AMP M S A D E N J15 AMP 1 5 2 3 4 C15 1uF 16V C15 1uF 16V C72 1uF 16V C72 1uF 16V C82 10uF 10V C82 10uF 10V 1 2...

Page 24: ...RESET 2 SCLK 3 SDATA 4 SEN 5 AGND 6 CLKP 7 CLKM 8 AGND 9 INP 10 INM 11 AGND 12 AVDD 13 CM_REFIN 14 AVDD_FVDD 15 PDN 16 D0_D1_M 17 D0_D1_P 18 D2_D3_M 19 D2_D3_P 20 D4_D5_M 21 D4_D5_P 22 D6_D7_M 23 D6_D7_P 24 CLKOUTM 25 CLKOUTP 26 D8_D9_M 27 D8_D9_P 28 D10_D11_M 29 D10_D11_P 30 D12_D13_M 31 D12_D13_P 32 DRVSS GND PAD 33 R64 0 OHM Do Not Install R64 0 OHM Do Not Install J7 J7 1 2 3 TP6 TP6 R7 0 OHM R...

Page 25: ...6 1uF C26 1uF 1 2 C25 1uF C25 1uF 1 2 JP4 JP4 1 2 3 R27 121 1 10W Do Not Install 1 R27 121 1 10W Do Not Install 1 C24 1uF C24 1uF 1 2 R59 82 5 R59 82 5 U2 CDCM1803 U2 CDCM1803 IN 4 VSS 7 VDDPECL 5 Y1 15 Y1 16 VDD1 17 VDD1 14 EN 1 VDDPECL 2 IN 3 VSS 13 VBB 6 VDD2 8 Y2 9 Y2 10 VDD2 11 NC 12 S0 18 S1 19 VDD0 20 Y0 21 Y0 22 VDD0 23 S2 24 GND 25 C23 1uF C23 1uF 1 2 T3 TC1 1T T3 TC1 1T 3 2 1 6 5 4 C18 1...

Page 26: ...12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 G1 G2 G3 G4 G5 G6 G7 G8 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 Physical Descri...

Page 27: ...0 OHM R65 0 OHM J14 BLK GND J14 BLK GND C7 1uF C7 1uF 1 2 C9 10uF 6 3V C9 10uF 6 3V 1 2 L8 68 L8 68 1 2 C57 10uF 6 3V C57 10uF 6 3V 1 2 L3 68 L3 68 1 2 J12 BLK GND J12 BLK GND C2 10uF 6 3V C2 10uF 6 3V 1 2 5V_IN 3 3V_AUX 5V VSS_AMP C67 1uF 16V C67 1uF 16V C55 1uF 16V C55 1uF 16V C66 1uF 16V C66 1uF 16V J16 RED VSS_AMP J16 RED VSS_AMP L9 68 L9 68 1 2 U10 TPS73233 U10 TPS73233 EN 3 IN 1 GND 2 OUT 5 ...

Page 28: ...55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 J2 40PIN IDC DATA_OUT J2 40PIN IDC DATA_OUT 1 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 34 35 36 37 38 39 40 Physical Description www t...

Page 29: ...t This notice contains important safety information about temperatures and voltages For additional information on TI s environmental and or safety programs please contact the TI application engineer or visit www ti com esh No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine process or combination in which such TI products or s...

Page 30: ...usiness 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 neces...

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