AD9910/PCBZ Analog Devices Inc, AD9910/PCBZ Datasheet - Page 19

• Manufacturer Part Number: AD9910/PCBZ
• Description: Direct Digital Synthesis Evaluation Board
• Manufacturer: Analog Devices Inc
• Series: AgileRF™r

Specifications of AD9910/PCBZ

• Silicon Manufacturer: Analog Devices
• Application Sub Type: Direct Digital Synthesizer
• Kit Application Type: Clock & Timing
• Silicon Core Number: AD9910
• Kit Contents: Board
• Design Resources: Synchronizing Multiple AD9910 1 GSPS Direct Digital Synthesizers (CN0121)
• Main Purpose: Timing, Direct Digital Synthesis (DDS)
• Embedded: No
• Utilized Ic / Part: AD9910
• Primary Attributes: 14-Bit DAC, 32-Bit Tuning Word Width
• Secondary Attributes: 1GHz, Graphical User Interface
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: Q3335404

DIGITAL RAMP MODULATION MODE
In digital ramp modulation mode (see Figure 24), the modulated
DDS signal control parameter is supplied directly from the
digital ramp generator (DRG). The ramp generation parameters
are controlled through the serial I/O port.
The ramp generation parameters allow the user to control both
the rising and falling slopes of the ramp. The upper and lower
boundaries of the ramp, the step size and step rate of the rising
portion of the ramp, and the step size and step rate of the falling
portion of the ramp are all programmable.
PROFILE[2:0]
I/O_UPDATE
TxENABLE
I/O_RESET
PARALLEL
DRHOLD
DROVER
PDCLK
DRCTL
INPUT
SCLK
SDIO
OSK
CS
16
2
2
2
3
PARALLEL DATA
TIMING AND
CONTROL
PROGRAMMING
REGISTERS
8
RAM_SWP_OVR
GENERATOR
DAC FSC
OUTPUT
KEYING
DIGITAL
SHIFT
RAMP
RAM
PARTITION
CONTROL
ROUTE
DATA
AND
Figure 24. Digital Ramp Modulation Mode
AMPLITUDE (A)
PHASE (θ)
FREQUENCY (ω)
Rev. C | Page 19 of 64
INTERNAL CLOCK TIMING
AND CONTROL
AD9910
CONTROL
POWER-
DOWN
CLOCK
A
ω
θ
DDS
The ramp is digitally generated with 32-bit output resolution.
The 32-bit output of the DRG can be programmed to represent
frequency, phase, or amplitude. When programmed to represent
frequency, all 32 bits are used. However, when programmed to
represent phase or amplitude, only the 16 MSBs or 14 MSBs,
respectively, are used.
The ramp direction (rising or falling) is externally controlled by
the DRCTL pin. An additional pin (DRHOLD) allows the user
to suspend the ramp generator in its present state.
Asin (ωt + θ)
Acos (ωt + θ)
SYNCHRONIZATION
MULTICHIP
SYSCLK
DAC FSC
2
2
INVERSE
FILTER
SINC
8
PLL
÷2
8-BIT
AUX
DAC
14-BIT
DAC
DAC_RSET
IOUT
IOUT
REFCLK_OUT
REF_CLK
REF_CLK
XTAL_SEL
AD9910