参数资料
型号: AD9910BSVZ
厂商: Analog Devices Inc
文件页数: 11/64页
文件大小: 0K
描述: IC DDS 1GSPS 14BIT PAR 100TQFP
产品培训模块: Direct Digital Synthesis Tutorial Series (1 of 7): Introduction
Direct Digital Synthesizer Tutorial Series (7 of 7): DDS in Action
Direct Digital Synthesis Tutorial Series (3 of 7): Angle to Amplitude Converter
Direct Digital Synthesis Tutorial Series (6 of 7): SINC Envelope Correction
Direct Digital Synthesis Tutorial Series (4 of 7): Digital-to-Analog Converter
Direct Digital Synthesis Tutorial Series (2 of 7): The Accumulator
设计资源: Synchronizing Multiple AD9910 1 GSPS Direct Digital Synthesizers (CN0121)
标准包装: 1
分辨率(位): 14 b
主 fclk: 1GHz
调节字宽(位): 32 b
电源电压: 1.8V, 3.3V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 100-TQFP 裸露焊盘
供应商设备封装: 100-TQFP-EP(14x14)
包装: 托盘
产品目录页面: 552 (CN2011-ZH PDF)
Data Sheet
AD9910
Rev. D | Page 19 of 64
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.
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.
06479-
007
16
PARALLEL
INPUT
PDCLK
SCLK
SDIO
I/O_RESET
PROFILE[2:0]
I/O_UPDATE
RAM
E
X
T
_P
W
R_DW
N
DAC_RSET
IOUT
CS
TxENABLE
DAC FSC
OSK
A
θ
INVERSE
SINC
FILTER
CLOCK
AMPLITUDE (A)
FREQUENCY
(ω)
PHASE (θ)
DIGITAL
RAMP
GENERATOR
8
DAC FSC
8
2
MULTICHIP
SYNCHRONIZATION
SYSCLK
PLL
÷2
CL
O
CK
M
O
DE
REF_CLK
REFCLK_OUT
XTAL_SEL
PARALLEL DATA
TIMING AND
CONTROL
SER
IA
L
I/O
P
OR
T
2
AD9910
PROGRAMMING
REGISTERS
OUTPUT
SHIFT
KEYING
DATA
ROUTE
AND
PARTITION
CONTROL
3
INTERNAL CLOCK TIMING
AND CONTROL
ω
Acos (ωt + θ)
Asin (ωt + θ)
SYN
C
_
SMP_
ER
R
S
Y
NC_O
UT
S
Y
NC_I
N
P
LL_
LOC
K
P
LL_
LOOP
_
FI
L
T
ER
MA
ST
ER
_
R
ESET
2
DDS
AUX
DAC
8-BIT
DAC
14-BIT
RAM_SWP_OVR
DRCTL
DRHOLD
DROVER
S
Y
NC_CL
K
POWER-
DOWN
CONTROL
Figure 24. Digital Ramp Modulation Mode
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