AD9832BRU Analog Devices Inc, AD9832BRU Datasheet - Page 12

• Manufacturer Part Number: AD9832BRU
• Description: D/A Converter (D-A) IC
• Manufacturer: Analog Devices Inc

Specifications of AD9832BRU

• No. Of Pins: 16
• Peak Reflow Compatible (260 C): No
• No. Of Bits: 10 Bit
• Leaded Process Compatible: No
• Mounting Type: Surface Mount
• Interface Type: Serial
• Package / Case: 16-TSSOP
• Rohs Status: RoHS non-compliant
• Resolution (bits): 10 b
• Master Fclk: 25MHz
• Tuning Word Width (bits): 32 b
• Voltage - Supply: 2.97 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With: EVAL-AD9832EBZ - BOARD EVAL FOR AD9832
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

AD9832
THEORY OF OPERATION
Sine waves are typically thought of in terms of their magnitude
form a(t) = sin (ωt). However, these are nonlinear and not easy
to generate except through piecewise construction. On the
other hand, the angular information is linear in nature. That is,
the phase angle rotates through a fixed angle for each unit of
time. The angular rate depends on the frequency of the signal
by the traditional rate of ω = 2 πf.
+1
–1
2
0
0
Figure 23. Sine Wave
MAGNITUDE
PHASE
Rev. B | Page 12 of 24
Knowing that the phase of a sine wave is linear and given a
reference interval (clock period), the phase rotation for that
period can be determined by
Solving for ω,
Solving for f and substituting the reference clock frequency for
the reference period (1/f
The AD9832 builds the output based on this simple equation. A
simple DDS chip can implement this equation with three major
subcircuits.
ΔPhase = ωδt
ω = ΔPhase/δt = 2 πf
f = ΔPhase × f
MCLK
/2 π
MCLK
= δt),