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參數(shù)資料
| 型號： | ADS5521IPAPR |
| 英文描述： | 12-Bit, 105MSPS Analog-toDigital Converter |
| 中文描述： | 12位，105Msps模數(shù)轉(zhuǎn)換器toDigital轉(zhuǎn)換器 |
| 文件頁數(shù)： | 16/20頁 |
| 文件大小： | 261K |
| 代理商： | ADS5521IPAPR |
SBAS309 MAY 2004
www.ti.com
16
0.01
μ
F
CLKP
ADS5521
CLKM
0.01
μ
F
Differential Square Wave
or Sine Wave
(3V
PP
)
Figure 11. AC-Coupled, Differential Clock Input
For high input frequency sampling, it is recommended
to use a clock source with very low jitter. Additionally,
the internal ADC core uses both edges of the clock for
the conversion process. This means that, ideally, a 50%
duty cycle should be provided. Figure 12 shows the
performance variation of the ADC versus clock duty
cycle.
TBD
Figure 12. AC Performance vs Clock Duty Cycle
Bandpass filtering of the source can help produce a
50% duty cycle clock and reduce the effect of jitter.
When using a sinusoidal clock, the clock jitter will further
improve as the amplitude is increased. In that sense,
using a differential clock allows for the use of larger
amplitudes without exceeding the supply rails and
absolute maximum ratings of the ADC clock input.
Figure 13 shows the performance variation of the
device versus input clock amplitude. For detailed
clocking schemes based on transformer or PECL-level
clocks, refer to the ADS5521EVM User’s Guide,
available for download from www.ti.com.
TBD
Figure 13. AC Performance vs Clock Amplitude
INTERNAL DLL
In order to obtain the fastest sampling rates achievable
with the ADS5521, the device uses an internal digital
phase lock loop (DLL). Nevertheless, the limited
frequency range of operation of DLL degrades the
performance at clock frequencies below 60MSPS. In
order to operate the device below 60MSPS, the internal
DLL must be shut off using the DLL OFF mode
described in the
Serial Interface Programming
section.
The
Typical
Performance
performance obtained in both modes of operation: DLL
ON (default), and DLL OFF. In either of the two modes,
the device will enter power down mode if no clock or
slow clock is provided. The limit of the clock frequency
where the device will function properly is ensured to be
over 10MHz.
Curves
show
the
P
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADS5521IPAPRG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 105MSPS RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS5522 | 制造商:BB 制造商全稱:BB 功能描述:14-Bit, 80MSPS Analog-to-Digital Converter |
| ADS5522EVM | 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 ADS5522 Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V |
| ADS5522IPAP | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 80MSPS RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS5522IPAPG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 80MSPS RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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