AD9834BRUZ Analog Devices Inc, AD9834BRUZ Datasheet - Page 15
AD9834BRUZ
Manufacturer Part Number
AD9834BRUZ
Description
IC DDS 10BIT 50MHZ LP 20-TSSOP
Manufacturer
Analog Devices Inc
Specifications of AD9834BRUZ
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
Transmitting Current
3.8mA
Rf Ic Case Style
TSSOP
No. Of Pins
20
Supply Voltage Range
2.3V To 5.5V
Operating Temperature Range
-40°C To +105°C
Msl
MSL 3 - 168 Hours
Frequency Max
75MHz
Filter Terminals
SMD
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
EVAL-AD9834EBZ - BOARD EVAL FOR AD9834
Lead Free Status / Rohs Status
Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AD9834BRUZ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Company:
Part Number:
AD9834BRUZ-REEL
Manufacturer:
AD
Quantity:
1 045
Part Number:
AD9834BRUZ-REEL
Manufacturer:
ADI/亚德诺
Quantity:
20 000
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 = 2π f .
+1
–1
2p
0
0
Figure 27. Sine Wave
2π
2π
MAGNITUDE
PHASE
4π
4π
6π
6π
Rev. C | Page 15 of 36
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.
Solving for ω,
Solving for f and substituting the reference clock frequency for
the reference period (1/ f
The AD9834 builds the output based on this simple equation. A
simple DDS chip can implement this equation with three major
subcircuits: numerically controlled oscillator + phase modulator,
SIN ROM, and digital-to-analog converter (DAC). Each of these
subcircuits is discussed in the Circuit Description section.
Δ Phase = ω Δ t
ω = Δ Phase /Δ t = 2π f
f = Δ Phase × f
MCLK
/ 2π
MCLK
= Δ t ),
AD9834