AD9850/FSPCB Analog Devices Inc, AD9850/FSPCB Datasheet - Page 12

• Manufacturer Part Number: AD9850/FSPCB
• Description: D/A Converter (D-A) IC
• Manufacturer: Analog Devices Inc

Specifications of AD9850/FSPCB

• No. Of Bits: 32 Bit
• Mounting Type: Surface Mount
• Interface Type: Serial, Parallel
• Package / Case: 28-SSOP
• Rohs Status: RoHS non-compliant
• Main Purpose: Timing, Direct Digital Synthesis (DDS)
• Utilized Ic / Part: AD9850/FS
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -
• Lead Free Status / Rohs Status: Not Compliant

AD9850
W0
W1
W2
W3
W4
W5
W6
W7
W8
W9
W10
W11
W12
W13
REQUIRED TO RESET CONTROL REGISTERS
(PARALLEL)
DATA (W0)
NOTE: FOR DEVICE START-UP IN SERIAL MODE, HARDWIRE PIN 2 AT 0, PIN 3 AT 1, AND PIN 4 AT 1
(SEE FIGURE 11).
W CLK
FQ UD
Freq-b0 (LSB)
Freq-b1
Freq-b2
Freq-b3
Freq-b4
Freq-b5
Freq-b6
Freq-b7
Freq-b8
Freq-b9
Freq-b10
Freq-b11
Freq-b12
Freq-b13
Figure 11. Pins 2 to 4 Connection for Default Serial Mode Operation
FQ UD
DATA –
W CLK
Figure 12. Serial Load Frequency/Phase Update Sequence
Table IV. 40-Bit Serial Load Word Function Assignment
DATA (SERIAL)
Figure 10. Serial Load Enable Sequence
SUPPLY
W0
W14
W15
W16
W17
W18
W19
W20
W21
W22
W23
W24
W25
W26
W27
XXXXX011
+V
W1
ENABLE SERIAL MODE
Freq-b14
Freq-b15
Freq-b16
Freq-b17
Freq-b18
Freq-b19
Freq-b20
Freq-b21
Freq-b22
Freq-b23
Freq-b24
Freq-b25
Freq-b26
Freq-b27
NOTE: W32 AND W33 SHOULD ALWAYS BE SET TO 0.
–12–
40 W CLK CYCLES
W2
2
3
4
AD9850BRS
W3
W32 = 0
W28
W29
W30
W31
W32
W33
W34
W35
W36
W37
W38
W39
W33 = 0
W39
LOAD 40-BIT SERIAL WORD
Freq-b28
Freq-b29
Freq-b30
Freq-b31 (MSB)
Control
Control
Power-Down
Phase-b0 (LSB)
Phase-b1
Phase-b2
Phase-b3
Phase-b4 (MSB)
REV. H