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AD9851 1-30Mhz 3Vpp 信号发生器

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  • 日期: 2015-04-25
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标签: AD9851DDS

AD9851 1-30Mhz 3Vpp 信号发生器,详细电路图和说明。

DATA P1-3 LOAD P1-1 CLOCK P1-2 C21 0.1 +5V R13 10 K +5V +5V R15 10 K +5V R14 10 K +5V 14 (4) U4 Reference Oscillator 7 (2) 25 26 27 28 1 2 3 4 8 7 8 (3) 9 17 n.c. 22 D7 D6 D5 D4 D3 D2 D1 D0 FQ_UD VDD VDD VDD VDD VINP VINN QOUT QOUTB RSET IOUT W_CLK IOUTB U2 AD9851 CLKIN DACBL RESET GND GND GND GND Oscillator Module: Pins in (parens) correspond to use of SMT oscillator module (U4B) instead of DIP module (U4A). Oscillator supplied is 30 MHz SMT package. +5 (out) +V (in) GND P1-4 P1-8 P1-5 U3 +5V +5V UA78M05 +V 3 OUT IN 1 23 6 "+5V" + GND GND "Vin" "GND" 18 42 C8 C9 C10 11 C17 C18 C19 C20 1.0 0.1 0.1 0.1 0.1 0.1 0.1 16 15 13 n.c. 14 R10 12 n.c. 5.6 K 21 20 R12 R11 51 24 Low Pass Filter LPF components selected for R1 60 MHz usable signal (max) 51 L1 L2 0.1 0.1 C1 0.1 C13 C15 C16 15 15 82 C12 C14 +V C3 R6 0.1 1K R9 1K R17 200 3+ 8 2 U1a - R2 560 RF OUT "Out" P1-6 C6 0.22 C7 0.1 RF Amplifier R5 AD8008 51 1 5+ R18 200 U1b 7 6- 4 5 47 100 (CW) (Increasing gain) a b 10 19 R8 24 Components: Except as indicated, decimal 500 ab values of capacitance are in microfarads (uF); others are in picofarads (pF); resistances are in ohms; K = 1,000; R19 inductance is in microhenries (uH); 24 n.c. = No connection. C5 DDS-60 Daughtercard 0.1 NOTE: Don’t forget to install these red jumpers during kit construction! It’s easy to place a “solder blob” across the adjacent ‘a’ pads. NOTE: With R19 = 24 ohms, the output level of the DDS-60 card can be adjusted to a maximum of about 4Vpp before distortion occurs. (With 50-ohm load, the output will be about 2Vpp.) R3 R4 620 200 C2 0.1 rev A5 May 15, 2014 N2APB, N2CX
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