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National LMH6517, User Manual

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National LMH6517 User Manual Download Page 2

SP16160CH1RB Reference Design Board User’s Guide 

 

- 2 -  

www.national.com 

1.0 Reference Board Overview 

 

 

 

Figure 1:  SP16160CH1RB board (front side) 

 

SMA_AMP_I: 

In-Phase 

Analog Input  

ADC 

16DV160 

VCXO 

 (76.8 MHz) 

Reference 

Crystal 

Oscillator 

 (61.44 MHz) 

LMK 

04031B 

Low Noise 

Regulators 

H3: uWire 

Header 

LMH 
6517 

JP1 

FutureBus 
Connector 

+5.0V 

Power 

Connector 

SMA_AMP_Q: 

Quadrature 

Analog Input  

SAW & 

Clock 

Buffer 

Manual DVGA  

Gain Control (Optional) 

Summary of Contents for LMH6517

Page 1: ...B User s Guide 1 0 Reference Board Overview 2 2 0 Evaluation Kit Contents 4 3 0 System Description 4 4 0 Data Capture 5 5 0 Quick Start 5 6 0 Functional Description 7 7 0 System Performance 11 8 0 Dev...

Page 2: ...160CH1RB board front side SMA_AMP_I In Phase Analog Input ADC 16DV160 VCXO 76 8 MHz Reference Crystal Oscillator 61 44 MHz LMK 04031B Low Noise Regulators H3 uWire Header LMH 6517 JP1 FutureBus Connec...

Page 3: ...SP16160CH1RB Reference Design Board User s Guide 3 www national com Figure 2 SP16160CH1RB board back side Switching Regulators Varactor Controlled Crystal XO Optional...

Page 4: ...ples per second analog to digital converter ADC with parallel LVDS outputs LMH6517 A high performance dual channel digitally controlled variable gain amplifier DVGA with a 31 5 dB gain range in 0 5 dB...

Page 5: ...ition hardware through the FutureBus connector schematic reference designator H4 The SP16160CH1RB is compatible with National Semiconductor s WaveVision 5 1 Signal Path Digital Interface Board and ass...

Page 6: ...hould have a jumper installed on the main board to provide power to the PIC microcontroller board Lastly flip the switches on the PIC microcontroller board to the following positions Switch 1 ON Switc...

Page 7: ...e ADC input to full scale without compressing at the supply rails Ripple in the passband is easily kept below 1 dB The equivalent noise bandwidth ENBW of this filter is approximately 44 MHz Filter com...

Page 8: ...trolled oscillator VCO and a distribution stage The first PLL locks an external voltage controlled crystal oscillator VCXO to an incoming reference clock and filters the phase noise of the reference T...

Page 9: ...FutureBus connector on the edge of the reference board to the data capture hardware The data is clocked out of the ADC using the DRDY signal with a dual date rate DDR such that the even bits of both c...

Page 10: ...201 Frequency MHz Magnitude dBFS Ch I Average 1dBFS Ch I Average 3dBFS Ch I Average 6dBFS Ch Q Average 1dBFS Ch Q Average 3dBFS Ch Q Average 6dBFS Figure 10 Typical SFDR performance vs input signal f...

Page 11: ...iasing filter is 20 MHz considered here as the bandwidth with 0 5 dB ripple but the effective noise bandwidth is 44 MHz due to the gradual roll off of the filter profile Noise from the DVGA passes thr...

Page 12: ...eference Design Board User s Guide 12 www national com a b IM3 H3 H2 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 dBF...

Page 13: ...enuation of the ladder attenuator from 0 dB value 0 to 31 5 dB value 64 The ADC16DV160 can only be programmed via SPI but the LMH6517 can operate in multiple modes These modes include a Serial Mode in...

Page 14: ...uencies may also require loop filter changes for optimal jitter performance In the default hardware configuration 153 6 MHz is the only possible clock frequency due to the narrowband SAW filter in the...

Page 15: ...SP16160CH1RB Reference Design Board User s Guide 15 www national com Figure 16 LMK04031 CodeLoader configuration Bits Pins tab Figure 17 LMK04031B CodeLoader configuration PLL1 tab...

Page 16: ...18 may result in degraded performance of the reference board Figure 19 LMK04031B CodeLoader configuration Clock Outputs tab The LMK04031B clock outputs are not easily accessible on the SP16160CH1RB r...

Page 17: ...R7 located on the back side by the FutureBus Connector Figure 20 Orientation of the DIP switches that control the DVGA gain Part Sw Description 1 Latch active high 2 DVGA Enable active high 3 Gain 0...

Page 18: ...t A lower cost solution is achieved for this reference board design with a varactor controlled crystal at the expense of lower noise performance at high input signal frequencies due to jitter This cir...

Page 19: ...3 2 83 93 0 1 2 3 2 4 5 6 17 893 2 83 93 0 1 2 3 2 4 5 6 17 893 2 83 93 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2...

Page 20: ...3 3 6 6 7 5 3 5 5 5 6 5 6 75 6 75 6 7 7 43 43 6 6 4 4 5 4 5 4 5 5 3 3 57 57 6 6 55 4 55 4 6 6 6 6 5 6 5 6 7 6 7 6 6 6 4 4 77 6 77 6 4 4 5 5 3 3 6 6 7 4 7 4 0 5 0 5 6 6 6 6 6 9 6 6 6 6 3 6 6 6 6 9 8 8...

Page 21: ...1 893 2 2 3 93 0 1 2 3 2 4 5 6 17 A 1 B 1 893 2 2 3 93 0 1 2 3 2 4 5 6 17 A 1 B 1 893 2 2 3 93 2 2 D 3 03 D 3 03 2 E 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 D C D C 2 2 D 3 03 D 3 03 2 E 2 2 D D 2 2 2 2 12 2...

Page 22: ...83 93 7 888888888888888888888888888888888888888888888888888888888888888 4 9 4 A 9 B A454 6 9 C D A454 1 1 7 3 3 8 0 1 3 E 1 3 3 0 F 0 0 0 3 2 2 F F 2 2 D F F F F 316 316 2 2 2 2 2 2 2 2 D D 2 2 2 2 2...

Page 23: ...SP16160CH1RB Reference Design Board User s Guide 23 www national com 11 0 Layout Figure 27 Layer 1 Signal...

Page 24: ...SP16160CH1RB Reference Design Board User s Guide 24 www national com Figure 28 Layer 2 Ground...

Page 25: ...SP16160CH1RB Reference Design Board User s Guide 25 www national com Figure 29 Layer 3 Ground...

Page 26: ...SP16160CH1RB Reference Design Board User s Guide 26 www national com Figure 30 Layer 4 Power...

Page 27: ...SP16160CH1RB Reference Design Board User s Guide 27 www national com Figure 31 Layer 5 Ground...

Page 28: ...SP16160CH1RB Reference Design Board User s Guide 28 www national com Figure 32 Layer 6 Signal...

Page 29: ...Digi Key P10JCT ND 0 0810 10 0 81 30 2 R45 R50 24 9 RES 24 9 OHM 1 16W 1 0402 SMD smd_size0402 Panasonic ECG Digi Key P24 9LCT ND 0 0980 10 0 20 31 1 R171 49 9 RES 49 9 OHM 1 16W 1 0402 SMD smd_size0...

Page 30: ...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...

Page 31: ...or 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...

Page 32: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments SP16160CH1RBKIT NOPB...

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