Revision of the ADC/DAC Board for NIJ Public Safety Radio
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1 Revision of the ADC/DAC Board for NIJ Public Safety Radio S.M. Shajedul Hasan and S.W. Ellingson July 22, 2008 Contents 1 Introduction 2 2 Revised Design 2 3 Summary 3 A Bill of Materials 7 B Schematic 11 C Layout 16 Bradley Dept. of Electrical & Computer Engineering, 432 Durham Hall, Virginia Polytechnic Institute & State University, Blacksburg, VA USA. hasan@vt.edu 1
![1 Introduction In [1], we presented the design and development of an ADC/DAC evaluation board for NIJ public safety radio.](/docs-images/87/95034541/images/2-0.jpg "This board was developed under multi-band/multi-mode radio (MMR) project in Virginia Tech sponsored by the U.S. Department of Justice [2].")
2 1 Introduction In [1], we presented the design and development of an ADC/DAC evaluation board for NIJ public safety radio. This board was developed under multi-band/multi-mode radio (MMR) project in Virginia Tech sponsored by the U.S. Department of Justice [2]. A prototype radio was built using this ADC/DAC board to demonstrate the basic functionality of our desired MMR [3]. After the successful integration of the first prototype we planned to build a another prototype MMR, which will be more compact and will have less cable connections. Hence, we revised our first version of ADC/DAC board. This report presents the overall description of the revised ADC/DAC board. The image of this board is shown in Figure 1. Figure 1: Image of ADC/DAC board. This report is organized as follows. Section 2 presents the summary of the changes we made from the previous version of RFIC. Section 3 concludes the report presenting the total cost. Finally, three appendices present the bill of materials, complete schematic and layout images. 2 Revised Design The following changes have been made in this revised RFIC board: Removed all the power jumpers Added MMCX ganged connectors 2
3 Revised power supply circuits Added synthesizer circuits Table 1 present all the input/output ports of the revised RFIC board. Function Port Name Conn. Name Characteristics DAC Output IB J8-A Differential Output IA J8-B of I-Channel QB J8-C Differential Output QA J8-D of Q-Channel ADC Input IA J24-A Differential Input IB J24-B of I-Channel QB J24-C Differential Input QA J24-D of Q-Channel CLK ADC Input CLK ADC J5 ADC Reference Clock CLK DAC Input EXT CLK J9 External DAC Clock Synthesizer Output RF OUT J27 RF output from the synthesizer ADI Interface ADI J1, J12 ADI interface to FPGA Table 1: Input/Output ports of the ADC/DAC board. 3 Summary A summary of the cost for one ADC/DAC board is given in Table 2. Since we prepared just two boards for the present study using the quickest manufacturing time, the PCB fabrication and assembly cost is not representative of the cost to build the same device in large quantities. 3
4 Component Quantity Price(US $) ADC & DAC ICs Other ICs Capacitor Inductor Resistor Synthesizer MMCX Connector Other Connectors Other Components Subtotal PC Board PC Board Assembly Total Table 2: Summary of the cost for one ADC/DAC board. 4
5 References [1] S.M. Hasan and S.W. Ellingson, Design and Development of an ADC/DAC Evaluation Board for NIJ Public Safety Radio, Virginia Tech, VA, Tech. Rep. 24, Nov [Online]. Available: [2] NIJ project web site, [3] S.W. Ellingson and S.M. Hasan, Multiband/Multimode Radio (presentation slides), NIJ CommTech PI Meeting, Arlington, VA, October 24,
6 Appendices 6
7 A Bill of Materials This section presents the bill of materials. 7
8 Bill of Materials NIJ ADC_DAC Board, Ver. 2.0 MPRG/Virginia Tech Prepared By: S.M. Hasan, Date: FEB 20, 2008 Item Qty Reference Part Name Package Manufacturer Manufacturer Part# Distributor Distributor Part# Description 1 2 U2-3 74VHC SOL TOSHIBA TC74VHC541FW Digikey TC74VHC541FW-ND OCTAL BUS BUFFER 2 1 U4 74VHC04MTC 14-TSSOP FAIRCHILD SEMICONDUCTOR 74VHC04MTC Digikey 74VHC04MTC-ND HEX INVERTER 3 1 U8 AD3339,2.5V SOT-223 Analog Devices ADP3339AKCZ-2.5-R7 Digikey ADP3339AKCZ-2.5-R7CT-ND Low Dropout Regulator 4 3 U7 U9-10 AD3339,3V SOT-223 Analog Devices ADP3339AKCZ-3-RL7 Digikey ADP3339AKCZ-3-RL7CT-ND Low Dropout Regulator 5 1 U1 AD LQFP Analog Devices AD9248BSTZ-20 Digikey AD9248BSTZ-20-ND 14-Bit Dual A/D Converter 6 1 U5 AD SSOP ANALOG DEVICES AD9761ARSZ Digikey AD9761ARSZ-ND DUAL 10-BIT DAC 7 2 A1-2 Attenuator MMM168 Minicircuits LAT-10+ Minicircuits LAT-10+ SMD Fixed Attenuator 8 2 C74 C uF 100V CAP_1210 AVX Corporation 12101C103KAT2A Digikey ND 9 2 C57 C76 1uF 100V CAP_1210 AVX Corporation 12101C105KAT2A Digikey ND C7 C9 C12 C14 C16 C uF C21 CAP_0603 Panasonic-ECG ECJ-1VB1H102K Digikey PCC1772CT-ND C8 C10-11 C13 C17 C19-20 C25-27 C29-31 C33 0.1uF CAP_0603 Murata Electronics GRM188R71H104KA93D Digikey ND C37-38 C41-42 C C58 C78 C80 C pF 50V CAP_0603 AVX Corporation 06035C102KAT2A Digikey ND 13 4 C75 C79 C81 C83 100pF 50V CAP_0603 AVX Corporation 06035A101KAT2A Digikey ND 14 1 C36 1uF CAP_0603 Panasonic-ECG ECJ-1VB1C105K Digikey PCC2224CT-ND 15 4 C uF 10V CAP_0603 Panasonic-ECG ECJ-1VB1A225K Digikey PCC2397CT-ND 16 6 C23-24 C39-40 C pF CAP_0603 Murata Electronics GRM1885C2A200JA01D Digikey ND 17 5 C3-6 C35 0.1uF CAP_0805 Kemet C0805C104K5RACTU Digikey ND 18 4 C63 C65-66 C68 0.1uF CAP_1206 Kemet C1206C104K5RACTU Digikey ND CAPACITOR X INCHES CAPACITOR X INCHES CAPACITOR 0603 Size CAPACITOR 0603 Size CAPACITOR 0603 Size CAPACITOR 0603 Size CAPACITOR 0603 Size CAPACITOR 0603 Size CAPACITOR 0603 Size CAPACITOR 0805 Size CAPACITOR 1206 Size
9 Item Qty Reference Part Name Package Manufacturer Manufacturer Part# Distributor Distributor Part# Description C1-2 C15 C22 C28 C32 C34 C46-56 C59-60 C69 10uF 16V CAP_3216 Rohm TCA1C106M8R Digikey ND CAP TANTALUM 20 4 C61-62 C64 C67 22uF 10V CAP_3216 Rohm TCA1A226M8R Digikey ND CAP TANTALUM 21 1 J14 CONN_SAM8123_SOCK ET Socket Samtec Inc QSE L-D-A Digikey SAM8123-ND High Speed Socket 40 pins 22 2 J1 J12 DUAL_HEADER_40 Female Header Sullins Electronics PPPC202LFBN-RC Digikey S7123-ND Header Female 23 1 R15 Pot 10K SMT PANASONIC EVN-5ESX50B14 Digikey P5E103CT-ND TRIMMER POTENTIOMETER 24 1 D1 LED, Green SMT LITE-ON LTST-C190GKT Digikey ND LIGHT EMITTING DIODE 25 1 U13 SYNTHESIZER 280LF SYNERGY LFSW SYNERGY LFSW FREQUENCY SYNTHESIZER 26 1 E2 REGULATOR MSOP8G Linear Technology LT1965 Digikey LT1965IMS8E#PBF-ND Linear Regulator 27 4 L1-4 10uH L-1210 Panasonic-ECG ELJ-FA100JF Digikey PCD1817CT-ND Surface Mount Inductor 1210 Size 28 1 J27 MMCX_JACK MMCX Amphenol Connex Digikey ACX1275-ND MMCX CONNECTOR 29 3 J5 J9 J28 MMCX_EL_JACK MMCX Johnson Components Digikey J603-ND END LAUNCH MMCX JACK 30 2 J8 J24 MMCX_GANG_JACK MMCX Samtec Inc GRF1-J-P-04-E-ST-TH1 Digikey SAM8069-ND MMCX GANGED JACK 31 6 J2-4 J7 J13 J J6 J11 J J J21 RA_SINGLEHEADER_2PI N RA_SINGLEHEADER_3PI N RA_SINGLEHEADER_4PI N RA_SINGLEHEADER_6PI N Male Header TYCO Digikey A28764-ND R/A HEADER Male Header TYCO Digikey A28766-ND R/A HEADER Male Header TYCO Digikey A28768-ND R/A HEADER Male Header TYCO Digikey A28772-ND R/A HEADER 35 2 R36 R /10W RES-0603 Panasonic-ECG ERJ-3GEYJ101V Digikey P100GCT-ND 36 1 R48 10K 1/10W RES-0603 Rohm MCR03EZPJ103 Digikey RHM10KGCT-ND 37 3 R42-43 R45 1K 1/10W RES-0603 Yageo Corporation RC0603JR-071KL Digikey KGRCT-ND 38 1 R44 220K 1/10W RES-0603 Rohm MCR03EZPJ224 Digikey RHM220KGCT-ND 39 1 R37 2K 1/10W RES-0603 Panasonic-ECG ERJ-3GEYJ202V Digikey P2.0KGCT-ND RESISTOR 0603 Size RESISTOR 0603 Size RESISTOR 0603 Size RESISTOR 0603 Size RESISTOR 0603 Size
10 Item Qty Reference Part Name Package Manufacturer Manufacturer Part# Distributor Distributor Part# Description 40 1 R /10W RES-0603 Rohm MCR03EZPFX6980 Digikey RHM698HCT-ND RESISTOR 0603 Size 41 5 R31 R34-35 R /10W RES-0603 Panasonic-ECG ERJ-3EKF49R9V Digikey P49.9HCT-ND RESISTOR 0603 Size 42 1 R5 221/8W RES-0805 Panasonic-ECG ERJ-6GEYJ220V Digikey P22ACT-ND RESISTOR 0805 Size 43 2 R /8W RES-0805 Panasonic-ECG ERJ-6ENF4990V Digikey P499CCT-ND RESISTOR 0805 Size 44 7 R K 1/8W RES-0805 Rohm MCR10EZHF4991 Digikey RHM4.99KCCT RESISTOR 0805 Size 45 1 R13 01/4W RES-1206 Panasonic-ECG ERJ-8GEY0R00V Digikey P0.0ECT-ND RESISTOR 1206 Size 46 1 R K 1/4W RES-1206 Rohm MCR18EZHF1432 Digikey RHM14.3KFCT-ND RESISTOR 1206 Size 47 5 R6-9 R14 331/4W RES-1206 Panasonic-ECG ERJ-8GEYJ330V Digikey P33ECT-ND RESISTOR 1206 Size 48 1 R K 1/4W RES-1206 Rohm MCR18EZHF4531 Digikey RHM4.53KFCT-ND RESISTOR 1206 Size 49 1 R /4W RES-1206 Panasonic-ECG ERJ-8ENF49R9V Digikey P49.9FCT-ND RESISTOR 1206 Size 50 6 R25-26 R29-30 R32-33 RES_PAK_8_0402,10K RES-0402 CTS 741X163103JP Digikey 741X163103JPCT-ND RESISTOR PAK R1-4 R23-24 R27-28 RES_PAK_8_0402,22 ohm RES-0402 CTS 741X163220JP Digikey 741X163220JPCT-ND RESISTOR PAK E1 SM_BEADS_DIFF SMT FAIR-RITE PRODUCTS CORP Mouser LF SM BEADS DIFFERENTIAL 53 2 U6 U11 REGULATOR SO-8 Linear Technology LT1763CS8-5 Digikey LT1763CS8-5-ND Linear Regulator 54 4 U14-17 WU_BEAD_DIF BEAD_0603 WUERTH ELECTRONICS A Digikey ND SMD FERRITE CORE
11 B Schematic This section presents the schematic of the ADC/DAC board. This schematic contains the following four pages- ADC Circuits DAC Circuits Power Supply Circuits Synthesizer Circuit 11
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16 C Layout This section presents the layout and component placement of the RFFE board. The pages are added in the following order - Top layer (primary component side) Bottom layer (secondary component side) First inner layer (power layer) Second inner layer (ground layer) Component placement in top layer, and Component placement in bottom layer. 16
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