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參數(shù)資料
| 型號(hào)： | AD9752-EB |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 12-Bit, 125 MSPS High Performance TxDAC D/A Converter |
| 中文描述： | 12位，125 MSPS的TxDAC系列高性能D / A轉(zhuǎn)換 |
| 文件頁數(shù)： | 13/23頁 |
| 文件大小： | 364K |
| 代理商： | AD9752-EB |
REV. 0
AD9752
–13–
SLEEP MODE OPERATION
The AD9752 has a power-down function which turns off the
output current and reduces the supply current to less than
8.5 mA over the specified supply range of 2.7 V to 5.5 V and
temperature range. This mode can be activated by applying a
logic level “1” to the SLEEP pin. This digital input also con-
tains an active pull-down circuit that ensures the AD9752 re-
mains enabled if this input is left disconnected. The AD9752
takes less than 50 ns to power down and approximately 5
μ
s to
power back up.
POWER DISSIPATION
The power dissipation, P
D
, of the AD9752 is dependent on
several factors which include: (1) AVDD and DVDD, the
power supply voltages; (2) I
OUTFS
, the full-scale current output;
(3) f
CLOCK
, the update rate; (4) and the reconstructed digital
input waveform. The power dissipation is directly proportional
to the analog supply current, I
AVDD
, and the digital supply cur-
rent, I
DVDD
. I
AVDD
is directly proportional to I
OUTFS
as shown in
Figure 25 and is insensitive to f
CLOCK
.
Conversely, I
DVDD
is dependent on both the digital input wave-
form, f
CLOCK
, and digital supply DVDD. Figures 26 and 27
show I
DVDD
as a function of full-scale sine wave output ratios
(f
OUT
/f
CLOCK
) for various update rates with DVDD = 5 V and
DVDD = 3 V, respectively. Note, how I
DVDD
is reduced by more
than a factor of 2 when DVDD is reduced from 5 V to 3V.
I
OUTFS
– mA
35
52
20
4
6
8
10
12
14
16
18
30
25
20
15
10
I
A
Figure 25. I
AVDD
vs. I
OUTFS
RATIO (f
CLOCK
/f
OUT
)
18
16
0
0.01
1
0.1
I
D
8
6
4
2
12
10
14
125MSPS
100MSPS
50MSPS
25MSPS
5MSPS
Figure 26. I
DVDD
vs. Ratio @ DVDD = 5 V
RATIO (f
CLOCK
/f
OUT
)
8
0
0.01
1
0.1
I
D
6
4
2
125MSPS
100MSPS
50MSPS
25MSPS
5MSPS
Figure 27. I
DVDD
vs. Ratio @ DVDD = 3 V
APPLYING THE AD9752
OUTPUT CONFIGURATIONS
The following sections illustrate some typical output configura-
tions for the AD9752. 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.
A single-ended output is suitable for applications requiring a
unipolar voltage output. A positive unipolar output voltage will
result if IOUTA and/or IOUTB is connected to an appropri-
ately sized load resistor, R
LOAD
, referred to ACOM. This con-
figuration may be more suitable for a single-supply system
requiring a dc coupled, ground referred output voltage. Alterna-
tively, an amplifier could be configured as an I-V converter thus
converting IOUTA or IOUTB into a negative unipolar voltage.
This configuration provides the best dc linearity since IOUTA
or IOUTB is maintained at a virtual ground. Note, IOUTA
provides slightly better performance than IOUTB.
DIFFERENTIAL COUPLING USING A TRANSFORMER
An RF transformer can be used to perform a differential-to-
single-ended signal conversion as shown in Figure 28. 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. It also provides electrical isolation
and the ability to deliver twice the power to the load. Trans-
formers with different impedance ratios may also be used for
impedance matching purposes. Note that the transformer
provides ac coupling only.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD9752-EBZ | 功能描述:BOARD EVAL FOR AD9752 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估板 - 數(shù)模轉(zhuǎn)換器 (DAC) 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:1 系列:- DAC 的數(shù)量:4 位數(shù):12 采樣率（每秒）:- 數(shù)據(jù)接口:串行，SPI? 設(shè)置時(shí)間:3µs DAC 型:電流/電壓 工作溫度:-40°C ~ 85°C 已供物品:板 已用 IC / 零件:MAX5581 |
| AD9753 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Analog Devices: Data Converters: DAC 12-Bit, 10 ns to 100 ns Converters Selection Table |
| AD9753AST | 制造商:Analog Devices 功能描述:DAC 1-CH Segment 12-bit 48-Pin LQFP 制造商:Rochester Electronics LLC 功能描述:12-BIT, 300 MSPS TXDAC+ D/A CONVERTER - Tape and Reel 制造商:Analog Devices 功能描述:IC 12-BIT DAC |
| AD9753ASTRL | 制造商:Analog Devices 功能描述:DAC 1-CH Segment 12-bit 48-Pin LQFP T/R 制造商:Rochester Electronics LLC 功能描述:12-BIT, 300 MSPS TXDAC+ D/A CONVERTER - Tape and Reel |
| AD9753ASTZ | 功能描述:IC DAC 12BIT 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+® 標(biāo)準(zhǔn)包裝:1 系列:- 設(shè)置時(shí)間:4.5µs 位數(shù):12 數(shù)據(jù)接口:串行，SPI? 轉(zhuǎn)換器數(shù)目:1 電壓電源:單電源 功率耗散（最大）:- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:8-SOICN 包裝:剪切帶 (CT) 輸出數(shù)目和類型:1 電壓，單極；1 電壓，雙極 采樣率（每秒）:* 其它名稱:MCP4921T-E/SNCTMCP4921T-E/SNRCTMCP4921T-E/SNRCT-ND |
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