Diversity Receiver Chipset CLC5526, CLC5956, CLC5902 General Desc

The Datasheet Archive - 100 Million Datasheets from 7500 Manufacturers.

Diversity Receiver Chipset CLC5526, CLC5956, CLC5902 General Desc

Datasheet Thumbnail

Top Searches for this datasheet

Diversity Receiver Chipset CLC5526, CLC5956, CLC5902
Diversity Receiver Chipset CLC5526, CLC5956, CLC5902
General Description
Diversity Receiver Chipset (DRCS) five-chip narrowband receiver solution requiring less than square inches board area. five chips include CLC5526 Digitally-Controlled Variable Gain Amplifiers (DVGAs), CLC5956 12-bit 65MSPS Analog-to-Digital Converters (ADCs), CLC5902 Dual Digital Tuner/AGC. inputs 300MHz produce digital quadrature symbols baseband. Either channel diversity independent channel operation supported DRCS. This Diversity Receiver Chipset been designed support software configurable narrowband receivers. Direct IF-sampling removes need second mixer, associated channel filters. subsequent tuning channel filtering performed digitally CLC5902. Tuning accomplished quadrature mixing digital input signal with programmable digital signal. quadrature mixer outputs then channel-filtered sets programmable filters. ADC's 62dB SINAD Nyquist bandwidth, 150MHz input) enhanced DVGA digital processing provide 120dB dynamic range 216kHz bandwidth. DVGA compresses input dynamic range prior under control processor. Gain adjustment from -12dB +30dB allows 42dB compression. compressed signal optionally expanded digital domain provide extended linear output range. System noise sets realizable dynamic range 120dBFS GSM.
Features
52MSPS Operation Independent Channels Wide Dynamic Range: >120dB User Programmable Direct Sampling 300MHz Channel Filters include Fourth Order followed 21-tap 63-tap Symmetric FIRs Flexible output formats include Floating Point Fixed Point Serial Parallel output ports JTAG Boundary Scan Shutdown/Stand-by Capability Meets GSM, EDGE, PCS, DCS, AMPS, DAMPS, requirements Small Footprint Cost
DVGA
Dual Digital Tuner/AGC
DVGA
SerialOutA/B SerialOutB RDY/ACK ParallelOut POutEnable ParallelSelect
CLC5526
©1999 National Semiconductor Corporation
CLC5956
CLC5902
Rev. 1999
Operation
Three modes operation provided including Inhibit, Free Run, Burst. Burst mode allows pre-determined time before going into hold condition. This mode could used TDMA system track power ramp then hold peak value. operation based envelope detection absolute value circuit followed digital lowpass filter. filtered signal applied programmable look-up table allow complete flexibility setting threshold (attack point) deadband (hysteresis). output integrated resulting error signal drives DVGAs. Integrator gain programmable that loop time constant adjusted. integrator output read written allowing DVGAs initialized specific value TDMA systems.
division sample rate (decimation ratio). system esired output symbo rate 270.83kHz. channel filter coefficients should bandwidth approximately times symbol rate 216kHz. this case, noise will reduced factor 52MHz/216kHz 23.7dB. greater ratio sample rate channel filter bandwidth better system noise performance. CLC5902 accepts inputs 14-bits. operation generates 3-bit exponent which scale 14-bit input words into 21-bit internal word width. output final filter bits either bits this data selected output. output words available standard serial formats 16-bit parallel words. DVGAs CLC5902 configured provide compressed dynamic range full linear dynamic range more than 120dBFS. input signal increases, DVGA will attenuate input signal steps. output scaled steps maintain linear input output relationship. representative example expanded dynamic range Diversity Receiver Chipset shown figure below. 42dB gain range DVGA clearly seen difference between output CLC5902 output. zero SINAD point seen where -120dBFS.
Dynamic Range
Diversity Receiver Chipset dynamic range determined following component contributions. Component
CLC5526 DVGA CLC5526 DVGA CLC5956 CLC5902 Processing Gain Total
Input Dynamic Range (GSM)
42dB Gain Range -7.2dB Noise Contribution 62dBFS SINAD 150MHz, 52MHz) 23.7dB (10*log(52MHz/216kHz)) 120dBFS
System operation
CLC5956 requires low-jitter PECL clock which must converted clock CLC5902. This clock divided CLC5902 generate desired output sample rate channel filter bandwidth. System power requirements include 1.85W 0.75W +3.3V. Shutdown/stand-by modes available DVGAs ADCs. CLC5902 power requirements reduced when input clock stopped.
Processing gain comes from reduction output bandwidth provided channel filters. channel filter bandwidth output symbol rate controlled
DRCS Measured SINAD Output
SINAD (dB) 26MHz
Output
Output (dBFS)
SINAD
-120 -100 -120 -100 (dBFS)
Rev. 1999
©1999 National Semiconductor Corporation
Diversity Receiver Chipset Measured Data:
DRCS Eval. Board Large Signal Response
52MHz, Decimation 155.85MHz +5dBm, DVGA Gain -12dB Output -16.5dBFS, SINAD 59.5dB
Input (dBm)
-100 -120 -140 -160
0.0E+00
1.0E+04
2.0E+04
3.0E+04
4.0E+04
5.0E+04
6.0E+04
7.0E+04
8.0E+04
9.0E+04
1.0E+05
1.1E+05
1.2E+05
1.3E+05 1.3E+05 1.3E+05
Frequency
DRCS Eval. Board Small Signal Response
Fs=52MHz, Decimation=192 Fin=155.85MHz -95dBm, DVGA Gain 30dB Output -116.2dBFS, SINAD=6.9dB
Input (dBm)
-100
-120
-140
-160
0.0E+00
1.0E+04
2.0E+04
3.0E+04
4.0E+04
5.0E+04
6.0E+04
7.0E+04
8.0E+04
9.0E+04
1.0E+05
1.1E+05
1.2E+05
Frequency
DRCS Eval. Board Blocker Response
52MHz, Decimation 155.85MHz -77dBm, DVGA Gain 24dB Blocker 153.0MHz -29dBm, DVGA Gain 24dB Output -98.9dBFS, SINAD 17.1dB
Input (dBm)
-100 -120 -140 -160
0.0E+00
1.0E+04
2.0E+04
3.0E+04
4.0E+04
5.0E+04
6.0E+04
7.0E+04
8.0E+04
9.0E+04
1.0E+05
1.1E+05
1.2E+05
Frequency
©1999 National Semiconductor Corporation
Rev. 1999
1.4E+05
1.4E+05
1.4E+05
Dynamic Performance (GSM Burst):
30µsec 70dB power ramp output, 52MSPS, 150MHz operation during burst does impair equalizer/demodulator operation.
Rising Ramp
Falling Ramp
0.75
0.375
0.25
Mixer Output
0.25
Mixer Output
1.0E+00 5.0E+02 1.0E+03 1.5E+03 2.0E+03 2.5E+03 3.0E+03 3.5E+03 4.0E+03 4.5E+03 5.0E+03 5.5E+03 6.0E+03
0.125
-0.25
-0.125
-0.5
-0.25
-0.75
-0.375
-0.5
1.0E+00 5.0E+02 1.0E+03 1.5E+03 2.0E+03 2.5E+03 3.0E+03 3.5E+03 4.0E+03 4.5E+03 5.0E+03 5.5E+03 6.0E+03
Sample
Sample
Diversity Receiver Chipset Constellation:
Code constellation; Vin(dBFS)= -20.1, BER= 30-Oct-1998 Code constellation; Vin(dBFS)= -100, BER= 1.4057e-007 30-Oct-1998
-0.8 -0.6 -0.4 -0.2
-0.2
-0.2
-0.4
-0.4
-0.6
-0.6
-0.8
-0.8
-0.8
-0.6
-0.4
-0.2
Rev. 1999
©1999 National Semiconductor Corporation
Diversity Receiver Chipset CLC5526, CLC5956, CLC5902
Customer Design Applications Support National Semiconductor committed design excellence. sales, literature technical support, call National Semiconductor Customer Response Group 1-800-272-9959 1-800-737-7018.
Life Support Policy National's products authorized critical components life support devices systems without express written approval president National Semiconductor Corporation. used herein: Life support devices systems devices systems which, intended surgical implant into body, support sustain life, whose failure perform, when properly used accordance with instructions provided labeling, reasonably expected result significant injury user. critical component component life support device system whose failure perform reasonably expected cause failure life support device system, affect safety effectiveness. National Semiconductor Corporation
National Semiconductor Europe
Fax: (+49) 0-180-530 E-mail: europe.support.nsc.com Deutsch Tel: (+49) 0-180-530 English Tel: (+49) 0-180-532 Francais Tel: (+49) 0-180-532 Italiano Tel: (+49) 0-180-534
National Semiconductor Hong Kong Ltd.
13th Floor, Straight Block Ocean Centre, Canton Road Tsimshatsui, Kowloon Hong Kong Tel: (852) 2737-1600 Fax: (852) 2736-9960
National Semiconductor Japan Ltd.
Tel: 81-043-299-2309 Fax: 81-043-299-2408
1111 West Bardin Road Arlington, 76017 Tel: 1(800) 272-9959 Fax: 1(800) 737-7018
National does assume responsibility circuitry described, circuit patent licenses implied National reserves right time without notice change said circuitry specifications. National Semiconductor® trademarks National Semiconductor Corporation. other trademarks property their respective companies.
http://www.national.com
Rev. 1999

Diversity Receiver Chipset CLC5526, CLC5956, CLC5902 General Desc

Top Searches for this datasheet

Other recent searches