ADC12C170HFEB/NOPB

Evaluation Board User’s Guide for ADC12C170: 12-Bit, 170 MSPS Analog to Digital Converter N www.national.com ADC12C170 Evaluation Board User’s Guide Analog Input FIN < 150 MHz Analog Input FIN > 150 MHz Analog Input Network ADC PD Jumper Clock Buffer (Reverse Side) CLK_SEL/DF Jumper PLD MODE Jumper INV Jumper Clock Input FutureBus Connector 5.0 V Power Connector Figure 1. ADC12C170 Evaluation Board Connector and Jumper Locations N -2- www.national.com ADC12C170 Evaluation Board User’s Guide The ADC12C170 Evaluation Board is designed to support the ADC12C170 12-bit 170 Mega Sample Per Second (MSPS) ADC. ADC12C170XXEB, please follow the Quick Start Guide in the WaveVision 4 User’s Guide to install the required software and to connect the WaveVision 4.0 Digital Interface Board to the PC and to the ADC12C170XXEB. The ADC12C170 Evaluation Board comes in two versions: 3.1 Evaluation Board Jumper Positions 1.0 Introduction 1. ADC12C170HFEB (high frequency version) for input frequencies greater than 150 MHz. Please refer to Figure 1 for the exact jumper locations. The ADC12C170XXEB jumpers should be configured as follows: 2. ADC12C170LFEB (low frequency version) for input frequencies less than 150 MHz. 1. J1 on the reverse of the board should be shorted. 2. MODE and INV jumpers on the front of the board should be shorted. See Section 4.4 for more detailed information regarding the function of the MODE and INV jumpers. 3. The PD jumper places the ADC12C170 into either powerdown or sleep mode. Table 1 below shows how to select between the power state. The digital data from the ADC12C170 can be captured with a suitable instrument, such as a logic analyzer, connected through the FutureBus connector (schematic reference designator FB) on the ADC12C170XXEB (where XX = HF or LF) or with National Semiconductor’s WaveVision 4.0 Digital Interface Board and associated WaveVision software package, which allows fast and easy data acquisition and analysis. The WaveVision hardware connects to a host PC via a USB cable and is fully configured and controlled by the latest WaveVision software. The WaveVision software and WaveVision 4.0 ADC evaluation hardware are available through the National Semiconductor website: (http://www.national.com/appinfo/adc/wv4.html). 2.0 Board Assembly Each evaluation board is configured for single-ended clock operation and is populated with an analog input network which has been optimized for one of two analog input frequencies ranges: PD Jumper Setting Open 1-2 3-4 Mode Normal Operation Power-down Sleep Table 1. CLK_SEL/DF Selection Table 4. CLK_SEL/DF pin jumpers select the output data format (2’s complement or offset binary) and clock mode (single-ended or differential). Table 2 below shows how to select between the clock modes and output data formats. Please note that the ADC12C170XXEB is delivered with the ADC12C170 clock input configured for singleended operation. CLK_SEL/DF Jumper Setting 1-2 3-4 5-6 7-8* 1. ADC12C170HFEB (high frequency version) for input frequencies greater than 170 MHz. 2. ADC12C170LFEB (low frequency version) for input frequencies less than 170 MHz. Clock Mode Output Data Format Differential Differential Single-Ended Single-Ended 2’s Complement Offset Binary 2’s Complement Offset Binary * As assembled from factory. Please refer to the input circuit configurations described in the Analog Input Section (4.2) of this guide. The location and description of the components on the ADC12C170 evaluation board can be found in Section 5.0 (Schematic) and Section 7.0 (Bill of Materials), respectively, of this user’s guide. 3.0 Quick Start The ADC12C170XXEB (where XX = HF or LF) enables easy set up for evaluating the performance of the ADC12C170. If the WaveVision 4 data acquisition and data analysis system is to be used for capturing data from the N Table 2. CLK_SEL/DF Selection Table 3.2 Connecting Power and Signal Sources 1. To power the ADC12C170XXEB, connect a 5.0V power supply capable of supplying up to 600mA to the green power connector labeled “+5V” which is located along the bottom edge of the ADC12C170XXEB. 2. Use the FutureBus connector (FB) to connect the ADC12C170XXEB to the instrument being used to capture the data from the evaluation board. If the WaveVision 4.0 Digital Interface Board is being used for data capture, a 5.0V supply capable of supplying up to 400mA is needed. See the WaveVision 4 User’s Guide for details on installing -3- www.national.com ADC12C170 Evaluation Board User’s Guide and operating the WaveVision 4.0 hardware and software system. 3. Connect the clock and signal inputs to the CLK_IN_SE and AIN_XX (where XX = HF or LF) SMA connectors, respectively. 4.0 Functional Description 4.1 Clock Input The clock used to sample the analog input should be applied to the CLK_IN_SE SMA connector (if using the single-ended clock mode). To achieve the best noise performance (best SNR), a low jitter clock source with total additive jitter less than 150 fs should be used. A low jitter crystal oscillator is recommended, but a sinusoidal signal generator with low phase noise, such as the HP8644B, can also be used with a slight degradation in the noise performance. The noise performance of the ADC12C170 can be improved further by making the edge transitions of the clock signal entering the ADC clock input (pin 11, CLK+) very sharp. The ADC12C170XXEB is assembled with a high speed buffer gate (NC7WV125K8X, schematic reference designator U2) in the clock input path to provide a sharp clock edge to the clock inputs and improve the noise performance of the ADC. Placing a bandpass filter between the clock source and the CLK_IN_SE SMA connector will further improve the noise performance of the ADC by filtering out the broadband noise of the clock source. All results in the ADC12C170 datasheet are obtained with a tunable bandpass filter made by Trilithic, Inc. (Indianapolis, IN) in the clock signal path. 4.2 Analog Input To obtain the best distortion results (best SFDR), the analog input network on the evaluation board must be optimized for the signal frequency being applied. For analog input frequencies up to approximately 150 MHz, the circuit in Figure 2 is recommended. This is the configuration of the assembled ADC12C170LFEB as it is delivered from the factory. Frequencies above 150 MHz, the circuit in Figure 3 is recommended. This is the configuration of the assembled ADC12C170HFEB as it is delivered from the factory. A low noise signal generator such as the HP8644B is recommended to drive the signal input of the ADC12C170XXEB. A low pass filter must be used to sufficiently suppress the harmonic distortion produced by the signal generator and to allow accurate measurement of the ADC12C170 distortion performance. In some cases, a second low pass filter may be necessary. Alternatively, a bandpass filter can be used to filter the distortion products of the signal generator. The bandpass filter will further improve the noise performance of the ADC by filtering the broadband noise of the signal generator. Data shown in the ADC12C170 datasheet was taken with a tunable bandpass filter made by Trilithic (Indianapolis, IN) in the analog signal path. Figure 2. Analog Input Network of ADC12C170LFEB: FIN < 150 MHz N -4- www.national.com ADC12C170 Evaluation Board User’s Guide Figure 3. Analog Input Network of ADC12C170HFEB: FIN > 150 MHz 4.3 ADC Reference and Input Common Mode The internal 1.0V reference on the ADC12C170 is used to acquire all of the results in the ADC12C170 datasheet. It is recommended to use the internal reference on the ADC12C170. However, if an external reference is required, the ADC12C170 is capable of accepting an external reference voltage between 0.9V and 1.1V (1.0V recommended). If an external reference is to be used, the ADC12C170XXEB includes a REF test point which can be used to apply the external reference to the ADC. It is recommended to use the voltage at the VRM pin (pin 45) of the ADC12C170 to provide the 1.5V common mode voltage required for the differential analog inputs VIN+ and VIN-. The ADC12C170XXEB is factory-assembled with VRM connected to the transformer center-tap through a 49.9Ω resistor to provide the necessary common mode voltage to the differential analog input. If an external common mode voltage is to be used, the ADC12C170XXEB includes a VCM test point which can be used to apply the external common mode voltage to the ADC. from 1.8V CMOS to 3.3V CMOS, which is compatible with the WaveVision 4.0 Digital Interface Board and other data capture instruments which the user may choose. The ADC12C170XXEB has been designed to give the user the flexibility to choose between passing the data from the ADC to the capture instrument either with or without latching the data in the PLD. Tables 3 and 4 show how to configure the PLD device through the MODE and INV jumpers on the evaluation board to enable the latching capability. The ADC12C170XXEB is factory assembled with both the MODE and INV jumpers shorted. Short Latch data with DRDY signal Open Pass data transparently without latching The data from the ADC12C170 in the PLD can be latched either on the rising or falling edge of DRDY. Table 4 shows how to choose which edge of DRDY will be used to latch the ADC data into the PLD. INV Jumper DRDY Latching Edge Short Falling Open Rising Table 4. PLD Latch Edge Selection Table The ADC12C170XXEB uses a PLD device from Lattice Semiconductor (LC4032V-25TN48C, schematic reference designator U5) to translate the ADC output N Data Transfer Through PLD Table 3. PLD Data Transfer Selection Table 4.4 Board Outputs The digitized 12-bit output word from the ADC12C170XXEB is available at pins B4 (MSB) through B15 (LSB) on the FutureBus connector (schematic reference designator FB). The data ready (DRDY) signal which should be used to capture the output data is available at pin D2 of the FutureBus connector and the over-range (OVR) bit which indicates that the input signal to the ADC has exceeded the maximum digitizable signal amplitude is available at pin B18 on the FutureBus connector. See the Evaluation Board schematic in Section 5.0 for details. MODE Jumper -5- www.national.com ADC12C170 Evaluation Board User’s Guide 4.5 Power requirements. Power to the ADC12C170XXEB is supplied through the green power connector labeled “+5V” which is located along the bottom edge of the board. Voltage and current requirements are: N • +5V at 600mA (ADC12C170XXEB only) • +5V at 1.0 A (ADC12C170XXEB and WaveVision 4.0 Digital Interface Board) -6- www.national.com ADC12C170 Evaluation Board User’s Guide 5.0 Evaluation Board Schematic Figure 4. Signals N -7- www.national.com ADC12C170 Evaluation Board User’s Guide 5.0 Schematic (cont.) Figure 5. Power Distribution N -8- www.national.com ADC12C170 Evaluation Board User’s Guide 6.0 Evaluation Board Layout Figure 6. Layer 1 - Signal N -9- www.national.com ADC12C170 Evaluation Board User’s Guide 6.0 Evaluation Board Layout (cont.) Figure 7. Layer 2 - Ground N - 10 - www.national.com ADC12C170 Evaluation Board User’s Guide 6.0 Evaluation Board Layout (cont.) Figure 8. Layer 3 - Power N - 11 - www.national.com ADC12C170 Evaluation Board User’s Guide 6.0 Evaluation Board Layout (cont.) Figure 9. Layer 4 - Signal N - 12 - www.national.com sm/c_0201 sm/c_1206 Manufacturer Atmel National Semiconductor MA/COM AMP Panasonic - ECG Panasonic - ECG 0.1uF 0.1uF SMD CAP CERAMIC 10V X5R 10% sm/c_0402 Panasonic - ECG 0.01uF 0.01uF SMD CAP CERAMIC 16V X7R 10% sm/c_0402 AVX Corporation 10uF 2pF 1uF 10uF 10uF SMD CAP CERAMIC 10V X5R 20% 2pF SMD CAP CERAMIC 50v +/-0.25pF 1uF SMD CAP CERAMIC 25V X7R 10% 10uF SMD CAP TANTALUM 6.3V 20% sm/c_1206 sm/c_0402 sm/c_1206 sm/c_3216 Panasonic - ECG Murata Electronics Panasonic - ECG Kemet 2.2uF 68uF 8x22 ohm Ferrite Bead Core Jumper 1x8 Jumper 2X2 Jumper 2X4 Shunt PLD 3.3V Regulator 1.8V Regulator Power Connector Terminal Block Power Connector Plug Bump-on Rubber Feet Tinylogic Buffer Kemet 2.2uF SMD CAP TANTALUM 16V 10% sm/c_3216 Kemet 68uF SMD CAP TANTALUM 6.3V 10% sm/c_7343 Panasonic -ECG 22 OHM SMD 8 RES ARRAY 5% sm/r_0402 x 8 Panasonic -ECG SMD FERRITE BEAD CORE 4.5X3.2X1.8 Samtec JUMPER BLOCK USING 8 PIN SIP HEADER Samtec 2X2 JUMPER BLOCK HEADER CUT TO SIZE FROM 2X6 HEADER Samtec 2X4 JUMPER BLOCK HEADER CUT TO SIZE FROM 2X6 HEADER FCI Electronic PLACE SHUNT ACROSS PINS 7-8 ON CLK_SEL/DF JUMPER Lattice Semiconductor ispMACH PLD, 3.3V core 48-TQFP National Semiconductor 1A LOW DROPOUT REGULATOR FOR 5V TO 3.3 V CONVERSION SOT-223 MICROPOWER/LOW NOISE, 500 mA ULTRA LOW-DROPOUT REGULATOR SOIC NARROW -8 National Semiconductor Phoenix Contact TERMINAL BLOCK 2POS 5.08mm Phoenix Contact TERMINAL BLOCK PLUG 2POS 5.08mm 3M PLACE BUMP ONS AT THE 4 CORNERS, ON BOTTOM OF BOARD Fairchild Semiconductor TINYLOGIC ULP-A BUFFER WITH 3-STATE OUTPUT 8-LEAD US8, JEDEC MO-187, CA 3.1 mm WIDE Murata Electronics FILTER LC HIGH FREQ .2UF 1806 SOLDER SHORT ACROSS THE PADS OF "J1" AND ACROSS PADS OF "MODE" Vishay Dale 0 OHM SMD RESISTOR sm/r_0402 Panasonic - ECG 1 kOHM SMD RESISTOR 1/16W 1% sm/r_0402 Yageo Corporation 24.9 OHM SMD RESISTOR 1/16W 1% sm/r_0402 Vishay Dale 33.2 OHM SMD RESISTOR 1/16W 1% sm/r_0402 Yageo Corporation 49.9 OHM SMD RESISTOR 1/16W 1% sm/r_0402 Emerson Network Power Connectivity PCB MOUNTABLE SMA CONNECTOR - www.national.com 28 29 6 2 Z1-6 J1, MODE Noise Suppression Filter Solder Short 30 31 32 33 34 35 2 11 2 2 3 2 R17, R19 R1-7, R12-13, R18, R20 R14-15 R26-27 R10, R24-25 AIN_HF, CLK_IN_SE 0 ohms 1 kOHM 24.9 ohms 33.2 ohms 49.9 ohms SMA Input PCB Footprint SOIC-8 48-LLP ADC12C170 Evaluation Board User’s Guide Description 2K SERIAL EEPROM 1.8V 12-Bit, 170 MSPS Analog/Digital Converter BALUN TRANSFORMER Z-PACK 2mm FB (Futurebus+) RIGHT ANGLE HEADER CONNECTOR 0.1uF SMD CAP CERAMIC 6.3V X5R 10% 0.1uF SMD CAP CERAMIC 25V X7R 10% 7.0 Evaluation Board Bill of Materials - 13 - Part Name 24C02 ADC12170 ETC1-1-13 AMP_5223514-1 0.1uF 0.1uF 7.1 ADC12C170HFEB (For Fin > 150 MHz) N Item Quantity Schematic Reference 1 1 U6 2 1 ADC 3 2 T6, T10 4 4 FB 5 1 C75 6 8 C2, C14, C20, C22, C24, C61, C66, C83 7 26 C9, C15-18, C26-27, C29, C31, C33, C35, C37, C39, C41, C43, C45, C47, C49-51, C53, C59, C71, C72, C73, C76 8 17 C10, C12, C28, C30, C32, C34, C36, C38, C40, C42 C44, C46, C55-58, C77 9 1 C13 10 1 C74 11 4 C4, C6, C63-64 12 12 C1, C3, C8, C19, C21, C23, C48, C52, C54, C60, C65, C82 13 1 C11 14 2 C5, C62 15 2 R8-9 16 2 L1, L2 17 1 JTAG 18 1 PD 19 1 CLK_SEL/DF 20 1 21 1 U5 22 2 U1, U4 23 1 U3 24 1 +5V 25 1 26 4 MT1-4 27 1 U2 PCB Footprint SOIC-8 48-LLP CD542 sm/c_0201 sm/c_1206 Manufacturer Atmel National Semiconductor MINI CIRCUITS AMP Panasonic - ECG Panasonic - ECG 0.1uF 0.1uF SMD CAP CERAMIC 10V X5R 10% sm/c_0402 Panasonic - ECG 0.01uF 0.01uF SMD CAP CERAMIC 16V X7R 10% sm/c_0402 AVX Corporation 10uF 15pF 1uF 10uF 10uF SMD CAP CERAMIC 10V X5R 20% 15pF SMD CAP CERAMIC 50v NP0 5% 1uF SMD CAP CERAMIC 25V X7R 10% 10uF SMD CAP TANTALUM 6.3V 20% sm/c_1206 sm/c_0402 sm/c_1206 sm/c_3216 Panasonic - ECG Panasonic - ECG Panasonic - ECG Kemet 2.2uF 68uF 8x22 ohm Ferrite Bead Core Jumper 1x8 Jumper 2X2 Jumper 2X4 Shunt PLD 3.3V Regulator 1.8V Regulator Power Connector Terminal Block Power Connector Plug Bump-on Rubber Feet Tinylogic Buffer Kemet 2.2uF SMD CAP TANTALUM 16V 10% sm/c_3216 Kemet 68uF SMD CAP TANTALUM 6.3V 10% sm/c_7343 Panasonic -ECG 22 OHM SMD 8 RES ARRAY 5% sm/r_0402 x 8 Panasonic -ECG SMD FERRITE BEAD CORE 4.5X3.2X1.8 Samtec JUMPER BLOCK USING 8 PIN SIP HEADER Samtec 2X2 JUMPER BLOCK HEADER CUT TO SIZE FROM 2X6 HEADER Samtec 2X4 JUMPER BLOCK HEADER CUT TO SIZE FROM 2X6 HEADER FCI Electronic PLACE SHUNT ACROSS PINS 7-8 ON CLK_SEL/DF JUMPER Lattice Semiconductor ispMACH PLD, 3.3V core 48-TQFP National Semiconductor 1A LOW DROPOUT REGULATOR FOR 5V TO 3.3 V CONVERSION SOT-223 MICROPOWER/LOW NOISE, 500 mA ULTRA LOW-DROPOUT REGULATOR SOIC NARROW -8 National Semiconductor Phoenix Contact TERMINAL BLOCK 2POS 5.08mm Phoenix Contact TERMINAL BLOCK PLUG 2POS 5.08mm 3M PLACE BUMP ONS AT THE 4 CORNERS, ON BOTTOM OF BOARD Fairchild Semiconductor TINYLOGIC ULP-A BUFFER WITH 3-STATE OUTPUT 8-LEAD US8, JEDEC MO-187, CA 3.1 mm WIDE Murata Electronics FILTER LC HIGH FREQ .2UF 1806 SOLDER SHORT ACROSS THE PADS OF "J1" AND ACROSS PADS OF "MODE" Vishay Dale 0 OHM SMD RESISTOR sm/r_0402 Panasonic - ECG 1 kOHM SMD RESISTOR 1/16W 1% sm/r_0402 Yageo Corporation 24.9 OHM SMD RESISTOR 1/16W 1% sm/r_0402 Vishay Dale 33.2 OHM SMD RESISTOR 1/16W 1% sm/r_0402 Yageo Corporation 49.9 OHM SMD RESISTOR 1/16W 1% sm/r_0402 Emerson Network Power Connectivity PCB MOUNTABLE SMA CONNECTOR - www.national.com 28 29 6 2 Z1-6 J1, MODE Noise Suppression Filter Solder Short 30 31 32 33 34 35 2 11 4 2 1 2 R17, R19 R1-7, R12-13, R18, R20 R14-15, R24-25 R26-27 R10 AIN_LF, CLK_IN_SE 0 ohms 1 kOHM 24.9 ohms 33.2 ohms 49.9 ohms SMA Input ADC12C170 Evaluation Board User’s Guide Description 2K SERIAL EEPROM 1.8V 12-Bit, 170 MSPS Analog/Digital Converter WIDEBAND RF TRANSFORMER 0.4MHz - 800 MHz Z-PACK 2mm FB (Futurebus+) RIGHT ANGLE HEADER CONNECTOR 0.1uF SMD CAP CERAMIC 6.3V X5R 10% 0.1uF SMD CAP CERAMIC 25V X7R 10% 7.0 Evaluation Board Bill of Materials (cont.) - 14 - Part Name 24C02 ADC12170 ADT1-1WT+ AMP_5223514-1 0.1uF 0.1uF 7.2 ADC12C170LFEB (For Fin < 150 MHz) N Item Quantity Schematic Reference 1 1 U6 2 1 ADC 3 1 T7 4 4 FB 5 1 C75 6 8 C2, C14, C20, C22, C24, C61, C66, C83 7 26 C7, C9, C15-18, C25, C26-27, C29, C31, C33, C35, C37, C39, C41, C43, C45, C47, C49-51, C53, C59, C73, C76 8 17 C10, C12, C28, C30, C32, C34, C36, C38, C40, C42 C44, C46, C55-58, C77 9 1 C13 10 3 C74, C78-79 11 4 C4, C6, C63-64 12 12 C1, C3, C8, C19, C21, C23, C48, C52, C54, C60, C65, C82 13 1 C11 14 2 C5, C62 15 2 R8-9 16 1 L1 17 1 JTAG 18 1 PD 19 1 CLK_SEL/DF 20 1 21 1 U5 22 2 U1, U4 23 1 U3 24 1 +5V 25 1 26 4 MT1-4 27 1 U2 ADC12C170 Evaluation Board User’s Guide The ADC12C170 Evaluation Board is intended for product evaluation purposes only and is not intended for resale to end consumers, is not authorized for such use and is not designed for compliance with European EMC Directive 89/336/EEC. WaveVision is a trademark of National Semiconductor Corporation. National does not assume any responsibility for use of any circuitry or software supplied or described. No circuit patent licenses are implied. LIFE SUPPORT POLICY NATIONAL'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. N National Semiconductor Corporation Americas Tel: 1-800-272-9959 Fax: 1-800-737-7018 Email: support@nsc.com National Semiconductor Europe Fax: +49 (0) 1 80-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 1 80-530 85 85 English Tel: +49 (0) 1 80 532 78 32 National Semiconductor Asia Pacific Customer Response Group Tel: 65-2544466 Fax: 65-2504466 Email: sea.support@nsc.com National Semiconductor Japan Ltd. Tel: 81-3-5639-7560 Fax: 81-3-5639-7507 National does not assume any responsibility for any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. 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