direct rf-sampling adcs 1 media presentation news embargo until july 11, 2011
TRANSCRIPT
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Direct RF-Sampling ADCs
Media Presentation News Embargo Until July 11, 2011
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Today’s News
• Pin-compatible family
– ADC12D1800RF 3.6 GSPS
– ADC12D1600RF 3.2 GSPS
– ADC12D1000RF 2.0 GSPS
– ADC12D800RF 1.6 GSPS
– ADC12D500RF 1.0 GSPS
• Industry’s best performance up to 2.7 GHz
• Enables Direct RF-sampling 3G/4G basestations
• Enables sampling into and beyond the 7th Nyquist zone
Breakthrough Direct RF-Sampling ADCs from National Semiconductor Revolutionize Radio Architectures
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ADC12D1800/1600/1000/800/500RFRF-Sampling ADCs Sample Beyond 2.7-GHz Inputs
Features• Sample beyond 2.7-GHz inputs
• Interleaved or dual-channel mode
• New high-bandwidth interleaved mode
• Pin-compatible with ADC12D1x00 and ADC10D1x00 families
• Autosync for multi-ADC systems
ScheduleADC12D1800/1600/1000RF• Samples & Boards NOW• Release to Production Late July
2011ADC12D800/500RF• Samples & Board NOW• Release to Production NOW
ADC12D1800/1600/1000RFIMD3 @ 2.7GHz -64/-70/-69 dBc
Noise floor -155/-154.6/-154 dBm/HzPower 4.4/4.0/3.5 W
ADC12D800/500RFIMD3 @ 2.7GHz -71/-69 dBc
Noise floor -152.2/-150.5 dBm/HzPower 2.5/2.0 W
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ADC12Dxx00RF Samples Beyond 2.7-GHz
470 475 480 485 490 495 500 505-160
-140
-120
-100
-80
-60
-40
-20
0
ADC output
dB
ADC12D800RFRF-Sampling Metrics
•Noise Floor -152.2 dBm/Hz• Wideband IMD3 @ -13 dBFS inputs
• -60 dBc• 2-tone IMD3 @ -16 dBFS inputs
• -71 dBc
3.84-MHz channel @ 2.7 GHz -13 dBFS
-13 dBFS CW blocker @ 2.71 GHz
Wideband IMD3 -73 dBFS
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Customers Want Integrated Radio Solutions
5
Don’t Care
Customer View
DSP
Customer Needs
• Reduced system cost• Reduced system size and weight• Simplified design• More flexible system• Lower power• Scalable solution
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RF-Sampling Eliminates Many ComponentsReplaces Entire IF-Sampling Subsystem
•Fewer components•Smaller board•Lower power•Flexible digital mixing & filtering•Less interference•1.8-GHz Nyquist BW
Benefits
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RF-Sampling Eliminates 20+ ComponentsReplaces Entire ZIF-Sampling Subsystem
•Fewer components•Smaller board•Lower power•Flexible digital mixing & filtering•Less interference•1.8-GHz Nyquist BW
Benefits
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ADC12Dxx00RF Apply to Many Applications
uWave BackhaulRadar
Comms & SIGINT
Media Servers /STB
FTTH
Data Acq.Auto Radar
Game Systems
3G/4G Basestation
Test equipment
Military Consumer Comms SDR, T&M
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Wireless BasestationsReplaces IF-Sampling in Rx and DPD
RF ADC
DSP
Old: IF-SamplingNew: RF-Sampling
Co
st
Are
a
Tim
e
DSP
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Wireless BasestationsReplaces ZIF-Sampling in Rx and DPD
DSP
RF ADC
DSP
Co
st
Are
a
Tim
eOld: ZIF-SamplingNew: RF-Sampling
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RF ADC
Old Solution
Military Designs Dramatically Reduces Size, Weight & Power
Analog Ctrlx100 to 1000
Analog Ctrl
11
DSP
DSP
RF-Sampling enables
x10 to 100
RF-Sampling Solution
•Combine multiple channels
1.8-GHz Nyquist zone enables•Eliminate freq conv stage•Digital control of freq
Ctrl in DSP
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Outdoor Unit
Indoor UnitOutdoor Unit
Microwave BackhaulReduce Size
RF ADC
Old Solution
DSPRF-Sampling
Solution
DSP
RF-Sampling enables
•Eliminate freq conv stage• Integrate ODU and IDU into single unit
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Microwave BackhaulIncrease Data Capacity
28MHz 56MHz 112MHz 250MHz 500MHz 1250MHz750MHz
Traditional band channels E-band channels
DPQPSK
16-QAM
64-QAM
256-QAM
1024-QAM
4096-QAM
Incr
ea
sed
Mo
du
lati
on
in
cre
as
es D
ata
Ca
pa
city
Increased Channel BW Increases Data Capacity
Simultaneously Increase
Modulation & BW
Excellent performance beyond 2.7 GHz • Increase modulation order
Nyquist zone up to 1.8 GHz • Increase channel bandwidth
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Excellent Linearity beyond 2.7 GHzIMD3
0 500 1000 1500 2000 2500 3000-80
-75
-70
-65
-60
-55
-50
Input Frequency
dB
c
-10 dBFS input
-13 dBFS input
-16 dBFS input
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New, Higher-fIN DES ModeDESCLKIQ for Supporting Higher Input Frequencies
IQ
Clk
IQ
Clk
IQ
Clk
IQ
Clk
Non-DES
DESI / DESQ
DESIQ
NEWDESCLKIQ
Improves interleaved fIN
range > 100%
ADC1xD1x00 modes
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Pin-Compatible GSPS ADC Portfolio
10-bitADC
Sampling Rate (MSPS)500 1000 1500 2000 2500 3000 3600
10D1000 10D1500
12D1000
12-bitADC
12D1000 12D1600
12D1800
12D1000RF
12D1600RF
12D1000RF
12D1600RF
12D1800RFNew RF
ADCs12D500
RF
12D800RF
12D800RF
12D1800RF
12D500RF
10D1000 10D1500
12D1600
12D1800
Non-DES
DES
Pin-compatible 10-bit, 12-bit, and RF-ADC family allows design reuse for different speeds & resolutions
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• National introduces industry’s first ADC for Direct RF-Sampling beyond 2.7 GHz
• Pin-compatible family covers 500-MSPS to 3.6-GSPS and is pin-compatible with existing 10- & 12-bit GSPS ADCs
• Single RF-sampling ADC replaces entire analog subsystem
• Shifts more processing to digital for lower power, better programmability
• New interleaving mode more than doubles usable frequency range
Summary
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