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參數(shù)資料
| 型號： | ADS902E |
| 英文描述： | 10-Bit, 30MHz Sampling ANALOG-TO-DIGITAL CONVERTER |
| 中文描述： | 10位，30MHz的采樣模擬數(shù)字轉(zhuǎn)換器 |
| 文件頁數(shù)： | 11/11頁 |
| 文件大?。?/td> | 194K |
| 代理商： | ADS902E |
11
ADS902
POWER-DOWN MODE
The ADS902’s low power consumption can be reduced even
further by initiating a power-down mode. To do so, the
Pwrdn-Pin (Pin 17) must be tied to a logic “High” reducing
the current drawn from the supply by about 88%. In normal
operation the power-down mode is disabled by an internal
pull-down resistor (50k
).
During power-down, the digital outputs are set into the high-
impedance condition (3-state). With the clock applied, the
converter does not accurately process the sampled signal.
After removing the power-down condition the output data
from the following 5 clock cycles is invalid (data latency).
DECOUPLING AND GROUNDING
CONSIDERATIONS
The ADS902 converter has several supply pins, one of
which is dedicated to supply only the output driver. The
remaining supply pins are not, as is often the case, divided
into analog and digital supply pins since they are internally
connected on the chip. For this reason it is recommended to
treat the converter as an analog component and to power it
from the analog supply only. Digital supply lines often carry
high levels of noise which can couple back into the converter
and limit the achievable performance.
Because of the pipeline architecture, the converter also
generates high frequency transients and noise that are fed
back into the supply and reference lines. This requires that
the supply and reference pins be sufficiently bypassed.
Figure 9 shows the recommended decoupling scheme for the
analog supplies. In most cases 0.1
μ
F ceramic chip capacitors
are adequate to keep the impedance low over a wide fre-
quency range. Their effectiveness largely depends on the
proximity to the individual supply pin. Therefore, they
should be located as close to the supply pins as possible.
FIGURE 9. Recommended Bypassing for Analog Supply
Pins.
+V
S
1
13
14
GND
ADS902
0.1μF
+V
S
18
19
20
GND
0.1μF
+V
S
28
0.1μF
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADS902E/1K | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述: |
| ADS9110EVM-PDK | 功能描述:ADS9110 - 18 Bit 2M Samples per Second Analog to Digital Converter (ADC) Evaluation Board 制造商:texas instruments 系列:- 零件狀態(tài):有效 A/D 轉(zhuǎn)換器數(shù):1 位數(shù):18 采樣率（每秒）:2M 數(shù)據(jù)接口:串行 輸入范圍:±VREF 不同條件下的功率（典型值）:15mW @ 2MSPS 使用的 IC/零件:ADS9110 所含物品:2 板，線纜 標(biāo)準(zhǔn)包裝:1 |
| ADS9110IRGER | 功能描述:18 Bit Analog to Digital Converter 1 Input 1 SAR 24-VQFN (4x4) 制造商:texas instruments 系列:- 包裝:剪切帶（CT） 零件狀態(tài):有效 位數(shù):18 采樣率（每秒）:2M 輸入數(shù):1 輸入類型:差分 數(shù)據(jù)接口:SPI 配置:S/H-ADC 無線電 - S/H:ADC:1:1 A/D 轉(zhuǎn)換器數(shù):1 架構(gòu):SAR 參考類型:外部 電壓 - 電源，模擬:1.65 V ~ 1.95 V 電壓 - 電源，數(shù)字:1.65 V ~ 1.95 V 特性:- 工作溫度:-40°C ~ 85°C 封裝/外殼:24-VFQFN 裸露焊盤 供應(yīng)商器件封裝:24-VQFN（4x4） 標(biāo)準(zhǔn)包裝:1 |
| ADS9110IRGET | 功能描述:ANALOG TO DIGITAL CONVERTERS - A 制造商:texas instruments 系列:* 包裝:帶卷（TR） 零件狀態(tài):在售 封裝/外殼:24-VFQFN 裸露焊盤 供應(yīng)商器件封裝:24-VQFN（4x4） 標(biāo)準(zhǔn)包裝:250 |
| ADS9120EVM-PDK | 功能描述:EVAL BOARD FOR ADS9120 制造商:texas instruments 系列:- 零件狀態(tài):在售 A/D 轉(zhuǎn)換器數(shù):1 位數(shù):16 采樣率（每秒）:2.5M 數(shù)據(jù)接口:SPI 輸入范圍:±VREF 不同條件下的功率（典型值）:9mW @ 2.5MSPS 使用的 IC/零件:ADS9120 所含物品:板，電纜 標(biāo)準(zhǔn)包裝:1 |
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