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參數(shù)資料
| 型號(hào)： | ADS807E |
| 英文描述： | 12-Bit, 53MHz Sampling ANALOG-TO-DIGITAL CONVERTER |
| 中文描述： | 12位，53MHz采樣模擬數(shù)字轉(zhuǎn)換器 |
| 文件頁數(shù)： | 12/15頁 |
| 文件大?。?/td> | 225K |
| 代理商： | ADS807E |
12
ADS807
V
IN
ADS807E
IN
IN
CM
499
249
24.9
24.9
249
OPA2681
0.1μF
0.1μF
0.1μF
499
499
499
249
249
24.9
1k
22pF
22pF
OPA234
OPA642
V
IN
R
F
402
R
G
402
ADS807E
R
S
16.5
68pF
0.1μF
0.1
μ
F
IN
IN
CM
+5V
–5V
1.82k
Single-Ended, AC-Coupled, Dual Supply Interface
The circuit provided in Figure 4 shows typical connections
for using the ADS807 in a single-ended input configuration.
The bias requirements for AC-coupling are provided by a
single resistor to the CM output lead. The single-ended
mode of operation should be considered for ease of interface
complexity and applications where the dynamic perfor-
mance can be compromised. The series resistor R
S
, along
with the shunt capacitance, provide the means to adjust the
bandwidth and optimize the performance towards good
signal-to-noise ratio. In addition, the amplifier configuration
can be easily modified for an anti-aliasing filter based on a
second-order Sallen-Key or Multiple-Feedback topology.
The interface example shown in Figure 4 operates with the
full-scale range of the ADS807 set to 2Vp-p, leaving suffi-
cient headroom for the output of the OPA642 to drive the
converter and maintain low signal distortion.
DC-Coupled, Differential Driver with Level Shift
Several applications will require that the bandwidth of the
signal path include DC, in which case, the signal has to be
DC-coupled to the A/D converter. An op amp based inter-
face circuit can be configured to scale and level shift the
input signal to be compatible with the selected input range
of the A/D converter. The circuit shown in Figure 5 employs
a dual op amp, OPA2681, to drive the input of the ADS807
differentially. The single-supply, general purpose op amp
OPA234 is added to buffer the common-mode voltage of
+2.5V, available at the CM pin, and apply it to the input of
the driver amplifier. This sets the correct DC voltage to bias
the inputs of the ADS807. It should be noted that any DC
voltage differences between the IN and IN inputs of the
ADS807 will result in an offset error.
Using the OPA2681, this circuit can be operated either with
a single or a dual
±
5V supply.
FIGURE 4. AC-Coupling the Dual Supply Amplifier OPA642 to the ADS807 for a 2Vp-p Full-Scale Input Range.
FIGURE 5. DC-Coupled Input Driver with Level Shifting.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADS807E/1K | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 53 MSPS SE/Diff imputs 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 |
| ADS807E/1KG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 53 MSPS SE/Diff imputs 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 |
| ADS807EG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 53 MSPS SE/Diff imputs 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 |
| ADS808 | 制造商:BB 制造商全稱:BB 功能描述:12-Bit, 70MHz Sampling ANALOG-TO-DIGITAL CONVERTER |
| ADS808Y/250 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 70MHz Sampling 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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