Summary of Contents for National LMH6517
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Page 1: Table Of Contents
SP16160CH1RB High-IF Receiver Reference Design Board LMH6517 + ADC16DV160 + LMK04031B User’s Guide 1.0 Reference Board Overview 2.0 Evaluation Kit Contents 3.0 System Description 4.0 Data Capture 5.0 Quick Start 6.0 Functional Description 7.0 System Performance 8.0 Device Configuration 9.0 Optional Hardware Configurations 10.0 Schematic... -
Page 2: Reference Board Overview
Analog Input 6517 16DV160 SMA_AMP_Q: Quadrature Analog Input SAW & Clock Buffer VCXO (76.8 MHz) 04031B Low Noise Reference Regulators Crystal Oscillator (61.44 MHz) H3: uWire Header +5.0V Figure 1: SP16160CH1RB board (front side) Power Connector www.national.com - 2 -... - Page 3 SP16160CH1RB Reference Design Board User’s Guide Switching Regulators Varactor Controlled Crystal XO (Optional) Figure 2: SP16160CH1RB board (back side) www.national.com - 3 -...
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Page 4: Evaluation Kit Contents
LMH6517 A high performance, dual channel • microcontroller board is included with the evaluation kit digitally controlled variable gain amplifier (DVGA) to properly configure the on-board clock solution. with a 31.5 dB gain range in 0.5 dB steps. -
Page 5: Data Capture
The digital data from the SP16160CH1RB reference design board can be captured with a suitable Begin by installing the latest version of WaveVision • instrument, such as a logic analyzer, or with National 5 and be sure to enable the update manager to Semiconductor’s WaveVision... - Page 6 A bandpass filter between the signal generator Quick Start Guide in the WaveVision User’s Guide output and the SP16160CH1RB SMA connector is which can be found on the National Semiconductor required to measure the true performance of the website http://www.national.com/ board.
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Page 7: Functional Description
Figure 6. A transformer is necessary to match the 50 ohm Table 1: Bandpass filter component values impedance of the signal generator to the 200 ohm input Center impedance of the LMH6517. The 1:4 impedance ratio Frequency [MHz] [nH] [nH]... - Page 8 This is the recommended reference configuration for SAW filter and then buffered with a low-noise CMOS the ADC16DV160. buffer to create a very low jitter, single-ended clock source at the CLK+ input of the ADC16DV160. Filtering www.national.com - 8 -...
- Page 9 “POWER” located along the side edge of the board. The power supply must be capable of sourcing +5V up to 1A. The SP16160CH1RB reference board draws approximately 800 mA when digitizing a full scale input. www.national.com - 9 -...
- Page 10 Ch.I Average -1dBFS SP16160CH1RB Typical SNR Ch.I Average -3dBFS Ch.I Average -6dBFS Ch.Q Average -1dBFS Ch.Q Average -3dBFS 73.5 Ch.Q Average -6dBFS 72.5 71.5 70.5 Frequency [MHz] Figure 11: Typical Nyquist-band SNR performance vs. input signal frequency www.national.com - 10 -...
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Page 11: System Performance
Noise from the DVGA passes through the filter bandpass to contribute to the total noise of the system. With the LMH6517 output noise density of 22 nV/sqrt(Hz) at 192 MHz and a 1 dB insertion loss through a filter with a 44 MHz... - Page 12 SP16160CH1RB Reference Design Board User’s Guide Figure 12: Typical FFT plot for a (a) 192 MHz, -1 dBFS input signal and (b) 194 MHz two-tone composite signal with 1 MHz spacing and -7 dBFS tones www.national.com - 12 -...
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Page 13: Device Configuration
The ADC16DV160 can only be programmed via SPI module is used, the JP1 jumper must be installed to but the LMH6517 can operate in multiple modes. provide power from the main board to the PIC module. These modes include a Serial Mode in which the... - Page 14 SP16160CH1RB Reference Design Board User’s Guide programmed with a PC using National Semiconductor’s standard 153.6 MHz path. Some output frequencies CodeLoader software. The serial programming may also require loop filter changes for optimal jitter interface can also be programmed over the USB port of performance.
- Page 15 SP16160CH1RB Reference Design Board User’s Guide Figure 16: LMK04031 CodeLoader configuration, Bits/Pins tab. Figure 17: LMK04031B CodeLoader configuration, PLL1 tab. www.national.com - 15 -...
- Page 16 Figure 19: LMK04031B CodeLoader configuration, Clock Outputs tab. The LMK04031B clock outputs are not easily accessible on the SP16160CH1RB reference board. http://www.national.com/appinfo/interface/clk_conditioners.html for information on acquiring the LMK04031B Evaluation board that provides full access to all clock outputs on the LMK04031B.
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Page 17: Optional Hardware Configurations
Populate R154, R155, R159, and R160 with 0 • ohm, 0402 resistors Populate R157 and R158 with 121 ohm, 0402 • resistors Figure 20: Orientation of the DIP switches that control the DVGA gain Populate C172 and C173 with 0.1uF, 0402 • capacitors www.national.com - 17 -... - Page 18 SP16160CH1RB Reference Design Board User’s Guide Please contact National Semiconductor for more Program the LMK04031B with the PIC Loader • information on configuring the reference board if this board set with Switch 1 = ON, Switch 2 = OFF option is desired.
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Page 19: Schematic
& & 6&/ & Placement of ADC & & & reference decoupling & & & capacitors is critical for & & & 127( .HHS WUDFHV & & specified performance WR $'& VKRUW & & & & & & & & &... - Page 20 9$03 6:*, 6:*, /0+ 63, '9*$B&/. '9*$B6', '9*$B&6& '9*$B6'2 3ODFH E\SDVV FDSV & & DV FORVH WR SLQV DV SRVVLEOH RQ EDFN VLGH & & & & 9$03 & & & & & & DGFBYLQB,S & & & & 60$B$03B, 60$B$03B, &...
- Page 21 93//,2 93//,2 *1'B5)287 *1'B *1'B 2( BQ 9&& & & 2( BQ *1'B5),1 < < 1& :9 1& :9 & & 60$B&/. 60$B&/. & & DGFBFONBS & & 93// & & DGFBFONBQ & & & & & & & & &...
- Page 22 6XSSO\ 5HTXLUHPHQWV 9$ S 9$ S P: FKDQQHO P: WRWDO 9,2 S $'& 9'5 9$03 P: # 9 93// 93//,2 P: # 95()26& 99&;2 P$ # 9$03 32:(5 32:(5 3& 3& (;& &/ (;& &/ 127( 3RVLWLYH LV RQ OHIW VLGH &...
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Page 23: Layout
SP16160CH1RB Reference Design Board User’s Guide 11.0 Layout Figure 27: Layer 1 - Signal www.national.com - 23 -... - Page 24 SP16160CH1RB Reference Design Board User’s Guide Figure 28: Layer 2 - Ground www.national.com - 24 -...
- Page 25 SP16160CH1RB Reference Design Board User’s Guide Figure 29: Layer 3 - Ground www.national.com - 25 -...
- Page 26 SP16160CH1RB Reference Design Board User’s Guide Figure 30: Layer 4 - Power www.national.com - 26 -...
- Page 27 SP16160CH1RB Reference Design Board User’s Guide Figure 31: Layer 5 - Ground www.national.com - 27 -...
- Page 28 SP16160CH1RB Reference Design Board User’s Guide Figure 32: Layer 6 - Signal www.national.com - 28 -...
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Page 29: Bill Of Materials
SURFACE MOUNT RF TRANSFORMER 50 OHM 10 TO 1900 MHz db714 MINI-CIRCUITS Mini-Circuits TCM4-19+ $2.0900 $4.18 ADC16DV160 Dual 16-bit 160 MSPS ADC with LVDS outputs sc-mkt-lqa68a National Semiconductor ADC16DV160 $140.00 1000 $140.00 24C02/SO8 2K SERIAL EEPROM soic8_050_wg244_l200 ATMEL Digi-Key AT24C02BN-SH-B-ND $0.3200... - Page 30 European EMC Directive 89/336/EEC. 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.
- Page 31 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.
- Page 32 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Texas Instruments SP16160CH1RBKIT/NOPB...