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MATLAB is a registered trademark of The MathWorks, Inc. Description
The GC1115 is a flexible, programmable, wideband crest factor reduction (CFR) processor with a maximum composite bandwidth of 32 MHz (4 clocks/complex sample, one channel) or 16 MHz (8 clocks/complex sample, two channels). The GC1115 selectively reduces the peak-to-average ratio (PAR) of wideband digital signals provided in quadrature (I and Q) format. By reducing the PAR of digital signals, the efficiency of follow-on power amplifiers (PAs) is improved, the D/A converter requirements are eased, and the out-of-band spectral regrowth caused by simple hard limiting is eliminated. Manufacturers of 3G BTS equipment can realize significant savings on power amplifier costs by including the GC1115. The GC1115 meets multicarrier 3G performance standards (PCDE, composite EVM, and ACLR) at PAR levels down to 6 dB. The GC1115 integrates easily into the transmit signal chain, between a digital upconverter such as the Texas Instruments GC5016 or GC5316 and a high-quality D/A converter, such as the Texas Instruments DAC5687. the GC1115 can be interleaved or parallel complex. The GC1115 uses four cascaded stages of peak detection and cancellation (PDC) to remove over-threshold peaks from the input signal. Each PDC stage can be independently programmed with detection target peak levels and cancellation pulse coefficients. A pool of 32 cancellation pulse generators can be flexibly assigned in groups of 4 to any PDC stage. Real or complex FIR cancellation coefficients are preprocessed into coefficients and derivative values. Cancellation pulses are designed to match the user's carrier frequency allocation. Cancellation pulse energy is bandlimited and thus is only added within allocated carrier bands. The GC1115 peak cancellation algorithm has minimal effect on the ACLR of the signal. The CFR data can be interpolated and output in complex or real formats. Input sampling rates to 130 Msps are supported, in either parallel or multiplexed I/Q modes, and in either 2s complement or unsigned format. The GC1115 includes an interpolator that increases the output sampling rate by 2× or 4× and optionally modulates the output signal to the fs/4 center frequency. Output sampling rates to 130 Msps are supported in either parallel or multiplexed I/Q modes, and in either 2s complement or unsigned format. A special one-channel, 2× output mode uses both GC1115 output ports to carry odd/even real output samples. Dual on-chip RAM provides either time-domain snapshots or long-term histogramming of the internal peak cancellation signal chain at five user-selected points, enabling real-time monitoring of the CCDF function. A power-level meter monitors either the GC1115 input or output power level. |
| Price | Packaging | CAD Design Tools | Samples | |||||
| Device | Status | Temp (oC) | Price | Quantity | Package | Pins | Package QTY | Package Carrier | Symbols | Footprints | Samples |
| GC1115IZDJ | ACTIVE | -40 to 85 | 43.75 | 1ku | BGA (ZDJ) | 256 | 90 | JEDEC TRAY (10+1) | |||
* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.
| Reported Distributor Inventory as of 11:48 AM GMT, 06 Nov 2009 | |||
| Region | Company | In Stock | Purchase |
| TI Lead Time*: 4 WeeksGC1115IZDJ | |||
| Americas | Rochester Electronics | 34 | |
| Worldwide | DigiKey | 239 | |
** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.
| Product Content | DPPM / MTBF / FIT Rate | ||||
| Device | Eco Plan* | Lead / Ball Finish | MSL Rating / Peak Reflow | Details | Details |
| GC1115IZDJ | Green (RoHS & no Sb/Br) | SNAGCU | Level-3-260C-168 HR | View | View |
* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.
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Most useful technical documents for GC1115 
| Name | Part # | Company | Tool / Software Type |
| GC1115 Evaluation Daughterboard | GC1115EVM | Texas Instruments | Daughter Cards |
| GC1115 System Evaluation Kit | GC1115SEK | Texas Instruments | Designer's Kits |
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| Part # | Name | Product Family | Comments |
| DAC5687 | 16-bit, 500 MSPS 2x-8x Interpolating Dual-Channel Digital-to-Analog Converter (DAC) | DATA CONVERTERS - DIGITAL TO ANALOG CONVERTER | |
| DAC5688 | 16-bit, 800 MSPS 2x-8x Interpolating Dual-Channel Digital-to-Analog Converter with integrated PLL | DATA CONVERTERS - DIGITAL TO ANALOG CONVERTER | |
| GC5316 | Integrated 24 ch DDC and 24 ch DUC | WIRELESS INFRASTRUCTURE DIGITAL RADIO PRODUCTS - DIGITAL UP AND DOWN CONVERTERS | |
| GC5318 | High Density Digital Up Converter | WIRELESS INFRASTRUCTURE DIGITAL RADIO PRODUCTS - DIGITAL UP AND DOWN CONVERTERS | |
| GC5016 | 4 channel wideband DDC and/or DUC | WIRELESS INFRASTRUCTURE DIGITAL RADIO PRODUCTS - DIGITAL UP AND DOWN CONVERTERS | |
| Customers Who Evaluated This Product Also Evaluated... | |||
| GC5322 | Wideband Transmit IC Solution with integrated Digital Predistortion, Digital Upconversion, | WIRELESS INFRASTRUCTURE DIGITAL RADIO PRODUCTS-WIDEBAND INTEGRATED TRANSMIT SOLUTIONS | TI customers also evaluated this product. |
| GC5325 | Wideband Digital Predistortion Transmit Processor | WIRELESS INFRASTRUCTURE DIGITAL RADIO PRODUCTS-WIDEBAND INTEGRATED TRANSMIT SOLUTIONS | TI customers also evaluated this product. |
| GC5016 | 4 channel wideband DDC and/or DUC | WIRELESS INFRASTRUCTURE DIGITAL RADIO PRODUCTS-DIGITAL UP AND DOWN CONVERTERS | TI customers also evaluated this product. |
| TRF3702 | 1.5 GHz - 2.5 GHz Quadrature Modulator | RF/IF AND ZIGBEE® SOLUTIONS-IQ MODULATOR | TI customers also evaluated this product. |

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