AD9834BRU Analog Devices Inc, AD9834BRU Datasheet - Page 24

• Manufacturer Part Number: AD9834BRU
• Description: 10 Bit, 20 Pin DDS I.C.
• Manufacturer: Analog Devices Inc

Specifications of AD9834BRU

• Rohs Status: RoHS non-compliant
• Design Resources: Amplitude Control Circuit for AD9834 Waveform Generator (CN0156)
• Resolution (bits): 10 b
• Master Fclk: 50MHz
• Tuning Word Width (bits): 28 b
• Voltage - Supply: 2.3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With: EVAL-AD9834EBZ - BOARD EVAL FOR AD9834
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

AD9834
YES
FSEL = SELECTED FREQUENCY REGISTER
(SEE TABLE 11 FOR EXAMPLE)
TO A FREQUENCY REGISTER?
(CONTROL REGISTER WRITE)
WRITE A FULL 28-BIT WORD
PSEL = SELECTED PHASE REGISTER
WRITE TWO CONSECUTIVE
FREQUENCY REGISTER?
WRITE ANOTHER FULL
(CONTROL REGISTER WRITE)
USING CONTROL
16-BIT WORDS
DATA WRITE
B28 (D13) = 1
28-BIT TO A
USING CONTROL
(CONTROL REGISTER WRITE)
RESET BIT = 0
BIT
PIN/SW = 0
BIT
YES
NO
PIN/SW = 0
RESET = 1
PHASE0 AND PHASE1 REG = (PHASESHIFT × 2
WRITE TO FREQUENCY AND PHASE REGISTERS
SELECT FREQUENCY REGISTERS
FREQ0 REG = f
FREQ1 REG = f
SELECT PHASE REGISTERS
NO
(SEE FIGURE 33)
INITIALIZATION
SET RESET = 0
APPLY RESET
TO A FREQUENCY REGISTER?
(CONTROL REGISTER WRITE)
Figure 32. Initialization
WRITE 14 MSBs OR LSBs
WRITE 14 MSBs OR LSBs
FREQUENCY REGISTER?
Figure 33. Data Write
(SEE TABLES 12 AND 13
Rev. C | Page 24 of 36
WRITE A 16-BIT WORD
OUT0
OUT1
FOR EXAMPLES)
HLB (D12) = 0/1
B28 (D13) = 0
/f
/f
FSELECT = SELECTED FREQUENCY REGISTER
MCLK
MCLK
TO A
PSELECT = SELECTED PHASE REGISTER
(CONTROL REGISTER WRITE)
× 2
× 2
NO
YES
28
28
(APPLY SIGNALS AT PINS)
PIN/SW = 1
12
USING PIN
RESET PIN = 0
)/2π
USING PIN
YES
NO
D15, D14 = 11
D11 ... D0 = PHASE DATA
D13 = 0/1 (CHOOSE THE
D12 = X
WRITE TO ANOTHER
PHASE REGISTER?
WRITE TO PHASE
SET RESET PIN = 1
(16-BIT WRITE)
REGISTER?
PHASE REGISTER)
NO
YES
YES