AD9854ASTZ Analog Devices Inc, AD9854ASTZ Datasheet - Page 17

• Manufacturer Part Number: AD9854ASTZ
• Description: IC DDS QUADRATURE CMOS 80-LQFP
• Manufacturer: Analog Devices Inc

Specifications of AD9854ASTZ

• Package / Case: 80-LQFP
• Resolution (bits): 12 b
• Master Fclk: 300MHz
• Tuning Word Width (bits): 48 b
• Voltage - Supply: 3.14 V ~ 3.47 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Supply Voltage Range: 3.135V To 3.465V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: LQFP
• No. Of Pins: 80
• Svhc: No SVHC (18-Jun-2010)
• Base Number: 9854
• Ic Function: Direct Digital Synthesizer
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AD9854/PCBZ - BOARD EVAL FOR AD9854
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

DDS – LO
NOTES
1. FLIP DDS QUADRATURE SIGNALS TO SELECT ALTERNATE SIDEBAND. ADJUST DDS
CLOCK
Figure 32. Differential Output Connection for Reduction of Common-Mode Signals
SINE OR COSINE SIGNAL AMPLITUDE FOR GREATEST SIDEBAND SUPPRESSION.
DDS DAC OUTPUTS MUST BE LOW-PASS FILTERED PRIOR TO USE WITH THE AD8346.
REF
REFERENCE
CLOCK
REFERENCE
LO
CLOCK
REJECTION
Figure 29. Programmable Fractional Divide-by-N Synthesizer
AD9854
TUNING
DAC OUT
WORD
TYPICAL
DDS
FILTER
36dB
+ LO
DDS
SSB
Figure 30. Agile High Frequency Synthesizer
AD9854
Figure 31. Single Sideband Upconversion
DDS
V
50Ω
AD8346 QUADRATURE
FILTER
OUT
COMPARATOR
AD9854
TUNING
PHASE
WORD
MODULATOR
TRANSFORMER-COUPLED
DDS
Σ
Rev. E | Page 17 of 52
(Mini-Circuits
I
I
OUT
OUT
1:1 TRANSFORMER
SPLITTER
DIFFERENTIAL
COMPARATOR
PHASE
DIVIDE-BY-N
OUTPUT
PHASE
50Ω
LO
LO
PROGRAMMABLE
DIVIDE-BY-N FUNCTION
(WHERE N = 2
REF CLK IN
90
0
®
FILTER
LOOP
T1-1T)
COSINE (DC TO 70MHz)
SINE (DC TO 70MHz)
2.5GHz
0.8 TO
FILTER
FILTER
LOOP
48
/TUNING WORD)
VCO
FREQUENCY
QUADRATURE
AD9854
OUT
RF
VCO
50Ω
DDS
FREQUENCY
OUT
RF
AD9854