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DAC5688 Folha de dados(PDF) 6 Page - Texas Instruments |
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DAC5688 Folha de dados(HTML) 6 Page - Texas Instruments |
6 / 47 page www.ti.com ELECTRICAL CHARACTERISTICS (AC SPECIFICATIONS) DAC5688 SLLS880A – DECEMBER 2007 – REVISED MARCH 2008 Over recommended operating free-air temperature range, AVDD, IOVDD = 3.3 V, DVDD, CLKVDD = 1.8 V, IOUTFS = 20 mA PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ANALOG OUTPUT(1) fDAC Maximum output update rate 800 MSPS ts(DAC) Output settling time to 0.1% Transition: Code 0x0000 to 0xFFFF 10.4 ns DAC outputs are updated on falling edge of DAC clock. tpd Output propagation delay 2 ns Does not include Digital Latency (see below). tr(IOUT) Output rise time 10% to 90% 220 ps tf(IOUT) Output fall time 90% to 10% 220 ps No Interp, NCO off, QMC off, ISINC = off, PLL = off 109 x2 Interpolation, NCO off, QMC off, ISINC = off, PLL = off 172 x4 Interpolation, NCO off, QMC off, ISINC = off, PLL = off 276 DAC Digital Latency x8 Interpolation, NCO off, QMC off, ISINC = off, PLL = off 488 clock cycles x8 Interpolation, NCO on, QMC off, ISINC = off, PLL = off 512 x8 Interpolation, NCO off, QMC on, ISINC = off, PLL = off 528 x8 Interpolation, NCO off, QMC off, ISINC = on, PLL = off 548 AC PERFORMANCE (2) ×4 Interp, PLL off, CLK2 = 800 MHz, FOUT= 10.1 MHz 83 Spurious free dynamic DAC A+B on, SFDR dBc FOUT= 20.1 MHz 79 range 0 dBFS Single tone, FOUT = FIN First Nyquist Zone < fDATA/2 ×4 Interp, PLL off, CLK2 = 800 MHz, NCO= 10 MHz, FOUT= 20.1 MHz 72 DAC A+B on, NCO= 60 MHz, FOUT= 70.1 MHz 68 0 dBFS Single tone, FIN = 10.1 MHz, SNR Signal-to-Noise Ratio dBc FOUT = FIN + NCO NCO= 140 MHz, FOUT= 150.1 MHz 64 NCO= 290 MHz, FOUT= 300.1 MHz 57 ×4 Interp, PLL off, CLK2 = 800 MHz, NCO= 40 MHz, FOUT= 51±0.5 MHz 85 Third-order DAC A+B on, IMD3 Two-Tone intermodulation NCO= 60 MHz, FOUT= 71±0.5 MHz 83 dBc FIN = 10.5 and 11. 5 MHz, (Each tone at –6 dBFS) FOUT = FIN + NCO NCO= 130 MHz, FOUT= 141±0.5 MHz 74 Four-tone Intermodulation ×4 Interp, PLL off, CLK2 = 800 MHz, DAC A+B on, IMD to Nyquist FIN = 9.8, 10.4, 11.6 and 12.2 MHz (600kHz spacing), NCO = 129 MHz, 73 dBc (Each tone at –12 dBFS) FOUT = FIN + NCO = 140±1.2 MHz ×8 Interp, PLL off, CLK2 = 737.28 MHz, Single Carrier, FOUT = 23.04 MHz 81 DAC A+B on, FIN = 23 .04 MHz, NCO = off ACLR Adjacent Channel ×8 Interp, PLL off, CLK2 = 737.28 MHz, Single Carrier, FOUT = 70MHz 81 dBc (3) Leakage Ratio DAC A+B on, FIN = Baseband I/Q, Single Carrier, FOUT = 140MHz 78 FOUT = NCO Four Carrier, FOUT = 140MHz 70 ×8 Interp, PLL off, CLK2 = 737.28 MHz, Single Carrier Noise Floor 101 dBm Noise Floor, DAC A+B on, Single Carrier NSD in 1 MHz BW 161 dBm/Hz Noise Spectral Density FIN = FOUT = Baseband I/Q, (NSD) 50 MHz offset, 1 MHz BW Four Carrier Noise Floor 101 dBm (3) Four Carrier NSD in 1 MHz BW 161 dBm/Hz (1) Measured differential across IOUTA1 and IOUTA2 or IOUTB1 and IOUTB2 with 25 Ω each to AVDD. (2) 4:1 transformer output termination, 50 Ω doubly terminated load (3) W-CDMA with 3.84 MHz BW, 5-MHz spacing, centered at IF. TESTMODEL 1, 10 ms 6 Submit Documentation Feedback Copyright © 2007–2008, Texas Instruments Incorporated Product Folder Link(s): DAC5688 |
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