參數(shù)資料
型號(hào)： AD9913BCPZ1
廠(chǎng)商： Analog Devices, Inc.
元件分類(lèi)： XO, clock
英文描述： Low Power 250 MSPS 10-Bit DAC 1.8 V CMOS Direct Digital Synthesizer
中文描述： 低功耗250 MSPS的10位DAC 1.8伏CMOS直接數(shù)字頻率合成器
文件頁(yè)數(shù)： 13/32頁(yè)
文件大小： 473K
代理商： AD9913BCPZ1
AD9913
AUXILIARY ACCUMULATOR
In addition to the phase accumulator of the DDS, the AD9913
has an auxiliary accumulator. This accumulator can be con-
figured to support either an automatic sweep of one of the
programmable characteristics of the DDS output (frequency or
phase), or it can be configured to implement a change in the
denominator of the frequency equation given in the DDS Core
section. For further details, refer to the Programmable Modulus
Mode section.
10-BIT DAC
The AD9913 incorporates an integrated 10-bit, current output
DAC. The output current is delivered as a balanced signal using
two outputs. The use of balanced outputs reduces the potential
amount of common-mode noise present at the DAC output,
offering the advantage of an increased signal-to-noise ratio. An
external resistor (R
SET
) connected between the RSET pin and
AGND establishes the reference current. The full-scale output
current of the DAC (I
OUT
) is produced as a scaled version of the
reference current. The recommended value of R
SET
is 4.62 kΩ.
The following equation computes the typical full-scale current
with respect to the R
set
resistor value and the gain control
setting:
0206
.
)
,
(
Rev. 0 | Page 13 of 32
(
)
x
R
R
x
I
SET
SET
OUT
+
×
=
1
The DAC is designed to operate with full-scale current values
up to 4.58 mA. Based on the equation and assuming a 4.62 kΩ
resistor value for R
SET
, and x = 0x1FF, the nominal output
current for the DAC is 2.28 mA.
Figure 17 shows the range of DAC output current vs. the DAC
FS value assuming an R
SET
value of 4.62 kΩ.
5
0
0
1200
DAC CODE
D
4
3
2
1
200
400
600
800
1000
0
Figure 21. DAC Output Current vs. DAC FS Bits
Pay careful attention to the load termination to ensure that the
output voltage remains within the specified compliance range;
voltages developed beyond this range cause excessive distortion
and can damage the DAC output circuitry.
I/O PORT
The AD9913 I/O port can be configured as a synchronous serial
communications port that allows easy interface to many industry-
standard microcontrollers and microprocessors. The serial I/O port
is compatible with most synchronous transfer formats, including
both the Motorola 6905/11 SPI and Intel 8051 SSR protocols. For
faster programming requirements, a parallel mode is also provided.
PROFILE SELECTIONS
The AD9913 supports the use of profiles, which consist of a group
of eight registers containing pertinent operating parameters for
a particular operating mode. Profiles enable rapid switching
between parameter sets. Profile parameters are programmed via
the I/O port. Once programmed, a specific profile is activated
by means of Register CFR1 Bits [22:20], or three external profile
select pins. The external profile pins option is only available in
serial mode.
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參數(shù)描述
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AD9913BCPZ-REEL71 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:Low Power 250 MSPS 10-Bit DAC 1.8 V CMOS Direct Digital Synthesizer
AD9914 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:3.5 GSPS Direct Digital Synthesizer with 12-Bit DAC
AD9914/PCBZ 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開(kāi)發(fā)工具 3.5 GSPS DDS w/Upconverter eval bd. RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類(lèi)型:ADC 工具用于評(píng)估:ADS130E08 接口類(lèi)型:SPI 工作電源電壓:- 6 V to + 6 V
AD9914BCPZ 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC - 多種 3.5 GSPS DDS w/Upconverter RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 分辨率:8 bit 工作電源電壓:2.7 V to 5.5 V 功耗: 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:MSOP-10 封裝:Reel
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