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DAC38RF80 Datasheet(PDF) 33 Page - Texas Instruments |
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DAC38RF80 Datasheet(HTML) 33 Page - Texas Instruments |
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33 / 155 page  14-b DAC Control Interface Temp Sensor Clock Distribution RBIAS DACCLK+ DACCLK- RX[4..7]+ RX[4..7]- RX[0..3]+ RX[0..3]- SYSREF+ SYSREF- VDDA18 DACB Gain Low Jitter PLL SYNC1\+ SYNC1\- 0.9 V Ref VDDS18 VDDT1 VDDR18 JTAG ATEST AMUX0/1 IFORCE VSENSE TESTMODE VEE18N VOUT2 CLKTX+ Divider /2, /3, /4 Multi-band DUC Channel 1 (multi-DUC1) x sin(x) 14-b DAC DACA Gain VOUT1 x sin(x) I Q I Q I Q I Q NCO 1 NCO 2 NCO 4 NCO 3 Multi-band DUC Channel 2 (multi-DUC2) CLKTX- SYNC2\+ SYNC2\- DACCLKSE VDDTX1 VDDTX18 VDDOUT18 Copyright © 2016, Texas Instruments Incorporated EXTIO 33 DAC38RF80, DAC38RF83, DAC38RF84 DAC38RF85, DAC38RF90, DAC38RF93 www.ti.com SLASEA3C – DECEMBER 2016 – REVISED JULY 2017 DAC38RF83 DAC38RF93 Submit Documentation Feedback Copyright © 2016–2017, Texas Instruments Incorporated 8 Detailed Description 8.1 Overview The DAC38RFxx is a family of high-performance, dual/single-channel, 14-bit, 9-GSPS, RF-sampling digital-to- analog converters (DACs) that are capable of synthesizing wideband signals from 0 to 4.5 GHz. A high dynamic range allows the DAC38RFxx family to generate signals for a wide range of applications including 3G/4G signals for wireless base-stations. The devices feature a low-power JESD204B Interface with up to 8 lanes, and provides a maximum bit rate and input data rate of 12.5 Gbps and 1.25 GSPS complex per channel respectively. The DAC38RFxx provides two digital up-converters per channel, with multiple options for interpolation rates. A digital quadrature modulator with independent, frequency flexible NCOs are available to support multi-band operation. An optional low-jitter PLL/VCO simplifies the DAC sampling clock generation by allowing use of a lower frequency reference clock. 8.2 Functional Block Diagrams Figure 45. DAC38RF80 Block Diagram |
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