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參數(shù)資料
| 型號： | SPT7720 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 8-BIT, 200 MSPS A/D CONVERTER |
| 中文描述： | 8位，200 MSPS的A / D轉(zhuǎn)換 |
| 文件頁數(shù)： | 7/10頁 |
| 文件大?。?/td> | 96K |
| 代理商： | SPT7720 |
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TYPICAL INTERFACE CIRCUIT
Very few external components are required to achieve the
stated device performance. Figure 3 shows the typical
interface requirements when using the SPT7720 in nor-
mal circuit operation. The following sections provide de-
scriptions of the major functions and outline performance
criteria to consider for achieving the optimal device
performance.
ANALOG INPUT
The input of the SPT7720 can be configured in various
ways depending on whether a single-ended or differential
input is desired.
The AC-coupled input is most conveniently implemented
using a transformer with a center-tapped secondary wind-
ing. The center tap is connected to the V
CM
pin as shown
in figure 3. To obtain low distortion, it is important that the
selected transformer does not exhibit core saturation at
the full-scale voltage. Proper termination of the input is im-
portant for input signal purity. A small capacitor across the
input attenuates kickback noise from the internal track-
and-hold.
Figure 4 illustrates a solution (based on operational ampli-
fiers) that can be used if a DC-coupled single-ended input
is desired. It is very important to select op amps with a
high open-loop gain, a bandwidth high enough so as not to
impair the performance of the ADC, low THD, and high
SNR.
INPUT PROTECTION
All I/O pads are protected with an on-chip protection
circuit. This circuit provides ESD robustness and prevents
latchup under severe discharge conditions without
degrading analog transmission times.
POWER SUPPLIES AND GROUNDING
The SPT7720 is operated from a single power supply in
the range of 4.75 to 5.25 volts. Normal operation is sug-
gested to be 5.0 volts. All power supply pins should be by-
passed as close to the package as possible.
Figure 3 – Typical Interface Circuit
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Figure 4 – DC-Coupled Single-Ended to Differential
Conversion
(power supplies and bypassing
are not shown)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SPT7720SIT | 8-BIT, 200 MSPS A/D CONVERTER |
| SPT774 | FAST, COMPLETE 12-BIT UP COMPATIBLE A/D CONVERTER WITH SAMPLE/HOLD |
| SPT774CCJ | FAST, COMPLETE 12-BIT UP COMPATIBLE A/D CONVERTER WITH SAMPLE/HOLD |
| SPT774CCN | FAST, COMPLETE 12-BIT UP COMPATIBLE A/D CONVERTER WITH SAMPLE/HOLD |
| SPT774CCS | FAST, COMPLETE 12-BIT UP COMPATIBLE A/D CONVERTER WITH SAMPLE/HOLD |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SPT7720SIT | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| SPT7720SITX | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| SPT7721 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:8-BIT, 250 MSPS ADC WITH DEMUXED OUTPUTS |
| SPT7721SIT | 功能描述:視頻模擬/數(shù)字化轉(zhuǎn)換器集成電路 8-BIT 250 MSPS ADC RoHS:否 制造商:Texas Instruments 輸入信號類型:Differential 轉(zhuǎn)換器數(shù)量:1 ADC 輸入端數(shù)量:4 轉(zhuǎn)換速率:3 Gbps 分辨率:8 bit 結(jié)構(gòu): 輸入電壓:3.3 V 接口類型:SPI 信噪比: 電壓參考: 電源電壓-最大:3.45 V 電源電壓-最小:3.15 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:TCSP-48 封裝:Reel |
| SPT7721SIT_Q | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 8-BIT 250 MSPS ADC 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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