GC6016 Datasheet, PDF (2/46 Pages) Texas Instruments – Wideband Transmit-Receive Digital Signal Processors

GC6016
SLWS227A – NOVEMBER 2010 – REVISED MARCH 2011
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These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
DESCRIPTION (Continued)
The CFR block reduces the peak-to-average ratio (PAR) of the digital transmit signals, such as those used in
third-generation (3G) code division multiple access (CDMA) and orthogonal frequency-division multiple-access
(OFDMA) applications.
By reducing the PAR of the digital signal and the PA nonlinearity, the operational efficiency of follow-on power
amplifiers can be substantially improved.
In Table 1, feedback is normally associated with a DPD system. The GC6016 can use the feedback input as a
calibration antenna input to the capture buffer. Several architectures that provide performance and cost
optimization are listed in Table 1
Figure
Figure 1
Figure 2
Figure 3
Figure 4
Table 1. Sample Configurations for GC6016
TX Antenna
2-62 MHz
2-62 MHz
2-62 MHz
4-31 MHz
RX Antenna
2 typical at 250 Msps, up to 4 at
250 Msps
2 at 250Msps, 4 with lower-rate
RX ADC
2 at 250Msps, 4 with lower-rate
RX ADC
4 at 250Msps, 8 with lower-rate
RX ADC
Other
Lower-cost 2-antenna solution
2-antenna solution with full-rate real feedback
2-antenna solution with complex feedback, lower
subsampling ratio
Lower-cost 4 antenna solution
ANTENNA MODE EXAMPLE DIAGRAMS
C6748
DSP
DAC3283/3482
I/Q
DAC
TRF3703/3720
I/Q Mod
Complex
TX
PA
I/Q
DAC
I/Q Mod
PA
Baseband
Data
GC6016
DUC-CFR
DDC
ADS41B49
FB
ADC
ADS62P49
RX
ADC
RX
ADC
Mixer/BPF
SW
Subsampled
Feedback
Mixer/BPF
Mixer/BPF
LNA
Real
RX
LNA
Figure 1. Two-Antenna-Mode Subsampled-Feedback Diagram
B0442-02
2
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