參數(shù)資料
型號(hào)： AD9751AST
廠商： ANALOG DEVICES INC
元件分類： DAC
英文描述： 10-Bit, 300 MSPS High-Speed TxDAC+ D/A Converter
中文描述： PARALLEL, WORD INPUT LOADING, 0.011 us SETTLING TIME, 10-BIT DAC, PQFP48
封裝： MS-026BBC, LQFP-48
文件頁(yè)數(shù)： 15/26頁(yè)
文件大?。?/td> 714K
代理商： AD9751AST
REV. 0
AD9751
–15–
I
OUTFS
–
mA
40
20
0
20
10
0
I
A
–
35
10
30
25
15
5
2.5
5
7.5
12.5
15
17.5
Figure 17. I
AVDD
vs. I
OUTFS
RATIO
–
f
OUT
/f
DAC
20
16
0
0.001
1
0.01
I
D
–
18
14
12
10
8
6
4
2
0.1
300MSPS
200MSPS
100MSPS
50MSPS
25MSPS
Figure 18. I
DVDD
vs. f
OUT
/f
DAC
Ratio
f
DAC
–
MHz
10
0
300
150
0
P
D
–
9
8
7
6
5
4
3
2
50
100
200
250
1
175
25
75
125
225
275
DIV SETTING 00
DIV SETTING 11
DIV SETTING 10
DIV SETTING 01
Figure 19. PLLVDD vs. f
DAC
APPLYING THE AD9751
OUTPUT CONFIGURATIONS
The following sections illustrate some typical output configura-
tions for the AD9751. Unless otherwise noted, it is assumed
that I
OUTFS
is set to a nominal 20 mA. For applications requir-
ing the optimum dynamic performance, a differential output
configuration is suggested. A differential output configuration
may consist of either an RF transformer or a differential op amp
configuration. The transformer configuration provides the opti-
mum high-frequency performance and is recommended for any
application allowing for ac-coupling. The differential op amp
configuration is suitable for applications requiring dc-coupling,
a bipolar output, signal gain, and/or level shifting, within the
bandwidth of the chosen op amp.
A single-ended output is suitable for applications requiring a
unipolar voltage output. A positive unipolar output voltage will
result if I
OUTA
and/or I
OUTB
is connected to an appropriately
sized load resistor, R
LOAD
, referred to ACOM. This configura-
tion may be more suitable for a single-supply system requiring a
dc-coupled, ground referred output voltage. Alternatively, an
amplifier could be configured as an I-V converter, thus converting
I
OUTA
or I
OUTB
into a negative unipolar voltage. This configuration
provides the best dc linearity since I
OUTA
or I
OUTB
is maintained
at a virtual ground. Note that I
OUTA
provides slightly better per-
formance than I
OUTB
.
DIFFERENTIAL COUPLING USING A TRANSFORMER
An RF transformer can be used to perform a differential-to-
single-ended signal conversion as shown in Figure 20. A
differentially-coupled transformer output provides the optimum
distortion performance for output signals whose spectral content
lies within the transformer’s passband. An RF transformer such
as the Mini-Circuits T1–1T provides excellent rejection of
common-mode distortion (i.e., even-order harmonics) and
noise over a wide frequency range. When I
OUTA
and I
OUTB
are
terminated to ground with 50
, this configuration provides
0 dBm power to a 50
load on the secondary with a DAC full-
scale current of 20 mA. A 2:1 transformer such as the Coilcraft
WB2040-PC can also be used in a configuration in which I
OUTA
and I
OUTB
are terminated to ground with 75
. This configura-
tion improves load matching and increases power to 2 dBm into
a 50
load on the secondary. Transformers with different
impedance ratios may also be used for impedance matching
purposes. Note that the transformer provides ac-coupling only.
R
LOAD
AD9751
MINI-CIRCUITS
T1-1T
I
OUTA
I
OUTB
Figure 20. Differential Output Using a Transformer
相關(guān)PDF資料
PDF描述
AD9751 10-Bit,300 MSPS High Speed T×DAC+TM D/A Converter(300MSPS,超高速,單通道10位D/A轉(zhuǎn)換器)
AD9752 12-Bit D/A Converter(100MSPS,12位D/A轉(zhuǎn)換器)
AD9753-EB 12-Bit, 300 MSPS High-Speed TxDAC+?? D/A Converter
AD9755AST 12-Bit, 300 MSPS High-Speed TxDAC+?? D/A Converter
AD9753 12-Bit,300 MSPS High Speed T×DAC+TM D/A Converter(300MSPS,超高速,單通道12位D/A轉(zhuǎn)換器)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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AD9751ASTZ 功能描述:IC DAC 10BIT 300MSPS 48-LQFP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:TxDAC+® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 設(shè)置時(shí)間:4µs 位數(shù):12 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 電壓電源:單電源 功率耗散（最大）:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:8-uMAX 包裝:管件 輸出數(shù)目和類型:2 電壓，單極 采樣率（每秒）:* 產(chǎn)品目錄頁(yè)面:1398 (CN2011-ZH PDF)
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AD9751ASTZRL 功能描述:IC DAC 10BIT 300MSPS 48LQFP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:TxDAC+® 產(chǎn)品培訓(xùn)模塊:Data Converter Fundamentals DAC Architectures 標(biāo)準(zhǔn)包裝:750 系列:- 設(shè)置時(shí)間:7µs 位數(shù):16 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 電壓電源:雙 ± 功率耗散（最大）:100mW 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-LCC（J 形引線） 供應(yīng)商設(shè)備封裝:28-PLCC（11.51x11.51） 包裝:帶卷 (TR) 輸出數(shù)目和類型:1 電壓，單極；1 電壓，雙極 采樣率（每秒）:143k
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