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參數資料
| 型號： | ADS800U |
| 英文描述： | 12-Bit, 40MHz Sampling ANALOG-TO-DIGITAL CONVERTER |
| 中文描述： | 12位，40MHz的采樣模擬數字轉換器 |
| 文件頁數： | 12/17頁 |
| 文件大?。?/td> | 368K |
| 代理商： | ADS800U |
ADS800
SBAS035B
12
www.ti.com
using two operational amplifiers, one in the noninverting mode
for the input and the other amplifier in the inverting mode for the
complementary input. The low distortion circuit in Figure 7 will
provide the necessary input shifting required for signals cen-
tered around ground. It also employs a diode for output level
shifting to ensure a low distortion +3.25V output swing. Other
amplifiers can be used in place of the OPA842s if the lowest
distortion is not necessary. If output level shifting circuits are
not used, care must be taken to select operational amplifiers
that give the necessary performance when swinging to +3.25V
with a
±
5V supply operational amplifier.
The ADS800 can also be configured with a single-ended
input full-scale range of +0.25V to +4.25V by tying the
complementary input to the common-mode reference volt-
age, as shown in Figure 8. This configuration will result in
increased even-order harmonics, especially at higher input
frequencies. However, this tradeoff may be quite acceptable
for time-domain applications. The driving amplifier must give
adequate performance with a +0.25V to +4.25V output swing
in this case.
EXTERNAL REFERENCES AND ADJUSTMENT
OF FULL-SCALE RANGE
The internal reference buffers are limited to approximately
1mA of output current. As a result, these internal +1.25V and
+3.25V references may be overridden by external references
that have at least 18mA (at room temperature) of output drive
capability. In this instance, the common-mode voltage will be
FIGURE 8. Single-Ended Input Connection.
22
26
27
CM
IN
IN
ADS800
0.1μF
Single-Ended
Input Signal
Full Scale = +0.25V to +4.25V with internal references.
22pF
FIGURE 7. A Low Distortion DC-Coupled, Single-Ended to Differential Input Driver Circuit.
604
301
301
301
604
49.9
301
604
2.49k
2.49k
+2.25V
OPA842
OPA130
301
0.1
μ
F
OPA842
OPA842
+5V
–
5V
+5V
(2)
+5V
–
5V
+5V
+5V
+5V
–
5V
BAS16
(1)
BAS16
(1)
301
24.9
Input Level
Shift Buffer
Optional
High Impedance
Input Amplifier
DC-Coupled
Input Signal
26 IN
22 CM
27 IN
ADS800
NOTES: (1) A Philips BAS16 diode or equivalent
may be used. (2) Supply bypassing not shown.
22pF
22pF
604
0.1
μ
F
0.1
μ
F
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ADS800U/1K | 功能描述:模數轉換器 - ADC 12-Bit 40 MSPS SE/Diff inputs RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS800U/1KG4 | 功能描述:模數轉換器 - ADC 12-Bit 40 MSPS SE/Diff inputs RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS800UG4 | 功能描述:模數轉換器 - ADC 12-Bit 40 MSPS SE/Diff inputs RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS801 | 制造商:BB 制造商全稱:BB 功能描述:12-Bit, 25MHz Sampling ANALOG-TO-DIGITAL CONVERTER |
| ADS801E | 制造商:BB 制造商全稱:BB 功能描述:12-Bit, 25MHz Sampling ANALOG-TO-DIGITAL CONVERTER |
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