AD9774 PDF Datasheet
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Description
This is 14-Bit/ 32 MSPS TxDAC with 4x Interpolation Filters. a
FEATURES Single 3 V or 5 V Supply 14-Bit DAC Resolution and Input Data Width 32 MSPS Input Data Rate at 5 V 13.5 MH- Reconstruction Bandwidth 12 ENOBS @ 1 MH- 77 dBc SFDR @ 5 MH- 4 Interpolation Filter 69 dB Image Rejection 84% Passband to Nyquist Ratio 0.002 dB Passband Ripple 23 3, 4 Cycle Latency Internal 4 Clock Multiplier On-Chip 1.20 V Reference 44-Lead MQFP Package APPLICATIONS Communication Transmit Channel: Wireless Basestations ADSL, HFC Modems Direct Digital Synthesis (DDS)
14-Bit, 32 MSPS TxDAC+™ with 4 Interpolation Filters AD9774
FUNCTIONAL BLOCK DIAGRAM
CLK4 IN PLLLOCK PLL ENABLE VCO IN, EXT PLL DIVIDE PLLCOM PLL CLOCK MULTIPLIER 4 DATA INPUTS (DB13-DB0) SNOOZE SLEEP DCOM DVDD 14
EDGE TRIGGERED LATCHES
AD9774
CLK IN, OUT 1 14 2 2 14 2 4
LPF PLLVDD IOUTA IOUTB
14 14-BIT DAC
+1.2V REFERENCE AND CONTROL AMP
REFIO FSADJ
ICOMP ACOM AVDD REFLO REFCOMP
Edge-triggered input latches, a 4× clock multiplier, and a temperature compensated bandgap reference have a.