Datasheet
Table Of Contents
- FEATURES
- APPLICATIONS
- FUNCTIONAL BLOCK DIAGRAM
- REVISION HISTORY
- GENERAL DESCRIPTION
- SPECIFICATIONS
- ABSOLUTE MAXIMUM RATINGS
- PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
- TYPICAL PERFORMANCE CHARACTERISTICS
- TYPICAL APPLICATIONS
- MODES OF OPERATION
- USING THE AD9852
- PROGRAMMING THE AD9852
- GENERAL OPERATION OF THE SERIAL INTERFACE
- POWER DISSIPATION AND THERMAL CONSIDERATIONS
- EVALUATION OF OPERATING CONDITIONS
- EVALUATION BOARD
- EVALUATION BOARD INSTRUCTIONS
- GENERAL OPERATING INSTRUCTIONS
- Hardware Preparation
- Clock Input, J25
- Three-State Control
- Programming
- Low-Pass Filter Testing
- Observing the Unfiltered IOUT1 and the Unfiltered IOUT2 DAC Signals
- Observing the Filtered IOUT1 and the Filtered IOUT2
- Observing the Filtered IOUT1 and the Filtered IOUT1
- Connecting the High Speed Comparator
- Single-Ended Configuration
- USING THE PROVIDED SOFTWARE
- SUPPORT
- OUTLINE DIMENSIONS
AD9852
Rev. E | Page 16 of 52
TYPICAL APPLICATIONS
RF/IF
INPUT
BASEBAND
REFCLK
COS
AD9852
LOW-PASS
FILTER
00634-025
Figure 25. Synthesized LO Application for the AD9852
I
Q
Rx
RF IN
DUAL
8-/10-BIT
ADC
DIGITAL
DEMODULATOR
Rx BASEBAND
DIGITAL
DATA OUT
8
8
I/Q MIXER
AND
LOW-PASS
FILTER
VCA
ADC ENCODE
ADC CLOCK FREQUENCY
LOCKED TO Tx CHIP/
SYMBOL/PN RATE
REFERENCE
CLOCK
48
CHIP/SYMBOL/PN
RATE DATA
AD9852
CLOCK
GENERATOR
AGC
00634-026
Figure 26. Chip Rate Generator in Spread Spectrum Application
50Ω
BAND-PASS
FILTER
50Ω
I
OUT
AD9852
FUNDAMENTAL
F
C
– F
O
IMAGE
F
CLK
F
C
+ F
O
IMAGE
BAND-PASS
FILTER
F
C
+ F
O
IMAGE
AD9852
SPECTRUM
FINAL OUTPUT
SPECTRUM
AMPLIFIER
00634-027
Figure 27. Using an Aliased Image to Generate a High Frequency
LOOP
FILTER
PHASE
COMPARATOR
REFERENCE
CLOCK
FILTER
AD9852
DDS
TUNING
WORD
REFCLK IN
RF FREQUENCY
OUT
DAC OUT
PROGRAMMABLE
DIVIDE-BY-N FUNCTION
(WHERE N = 2
48
/TUNING WORD)
VCO
00634-028
Figure 28. Programmable Fractional Divide-by-N Synthesizer