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參數(shù)資料
| 型號： | AD9774ASZRL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 11/24頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DAC 14BIT 32MSPS 44MQFP |
| 產(chǎn)品變化通告： | Product Discontinuance 27/Oct/2011 |
| 標準包裝： | 800 |
| 系列： | TxDAC+® |
| 設(shè)置時間： | 35ns |
| 位數(shù)： | 14 |
| 數(shù)據(jù)接口： | 并聯(lián) |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 電壓電源： | 模擬和數(shù)字 |
| 功率耗散（最大）： | 1.13W |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 44-QFP |
| 供應(yīng)商設(shè)備封裝： | 44-MQFP（10x10） |
| 包裝： | 帶卷 (TR) |
| 輸出數(shù)目和類型： | 2 電流，單極；2 電流，雙極 |
| 采樣率（每秒）： | 32M |
AD9774
–19–
REV. B
A multitone test vector may consist of several equal amplitude,
spaced carriers each representative of a channel within a defined
bandwidth as shown in Figure 42a. In many cases, one or more
tones are removed so the intermodulation distortion performance
of the DAC can be evaluated. Nonlinearities associated with the
DAC will create spurious tones of which some may fall back into
the “empty” channel thus limiting a channel’s carrier-to-noise
ratio. Other spurious components falling outside the band of
interest may also be important, depending on the system’s spectral
mask and filtering requirements.
This particular test vector was centered around one-half the
Nyquist bandwidth (i.e., fCLOCK/4) with a passband of fCLOCK/16.
Centering the tones at a much lower region (i.e., fCLOCK/10)
would lead to an improvement in performance while centering
the tones at a higher region (i.e., fCLOCK/2.5) would result in a
degradation in performance. Figure 43a shows the SFDR vs.
amplitude at 32 MSPS up to the Nyquist frequency while Fig-
ure 43b shows the SFDR vs. amplitude within the passband of
the test vector. In assessing a DAC’s multitone performance, it
is also recommended that several units be tested under exactly
the same conditions to determine any performance variability.
AD9774 EVALUATION BOARD
General Description
The AD9774-EB is an evaluation board for the AD9774 14-bit
DAC converter. Careful attention to layout and circuit design,
combined with a prototyping area, allows the user to easily and
effectively evaluate the AD9774 in signal reconstruction applica-
tions, where high resolution, high speed conversion is required.
This board allows the user the flexibility to operate the AD9774
in various configurations. The digital inputs are designed to be
driven directly from various word generators with the onboard
option to add a resistor network for proper load termination.
Provisions are also made to operate the AD9774 with either the
internal or external reference or to exercise the SLEEP or
SNOOZE power-savings feature.
AOUT – dBFS
80
40
–18
0
–16
–14
–12
–10
–8
–6
–4
–2
75
70
65
60
55
SFDR
–
dBc
50
45
Figure 43a. Multitone SFDR vs. AOUT @ 32 MSPS
(Up to Nyquist)
AOUT – dBFS
80
50
–18
0
–16
–14
–12
–10
–8
–6
–4
–2
75
70
65
60
SFDR
–
dBc
55
8MSPS
16MSPS
32MSPS
Figure 43b. Multitone SFDR vs. AOUT @ 32 MSPS
(Within Multitone Passband)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD9774EB | 制造商:AD 制造商全稱:Analog Devices 功能描述:14-Bit, 32 MSPS TxDAC⑩ with 4x Interpolation Filters |
| AD9774-EB | 制造商:Analog Devices 功能描述: |
| AD9774-EBZ | 制造商:Analog Devices 功能描述:14-BIT 32 MSPS TXDAC W/4X INTERPOLATION - Bulk |
| AD9775 | 制造商:AD 制造商全稱:Analog Devices 功能描述:14-Bit, 160 MSPS 2X/4X/8X Interpolating Dual TxDAC+ D/A Converter |
| AD9775BSV | 制造商:Analog Devices 功能描述:DAC 2-CH R-2R 14-bit 80-Pin TQFP EP 制造商:Rochester Electronics LLC 功能描述:14BIT 160 MSPS DUAL TXDAC+ D/A CONVERTER - Bulk 制造商:Analog Devices 功能描述:IC 14-BIT DAC |
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