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參數(shù)資料
| 型號： | ADS1250 |
| 英文描述： | 20-Bit Data Acquisition System ANALOG-TO-DIGITAL CONVERTER |
| 中文描述： | 20位數(shù)據(jù)采集系統(tǒng)的模擬數(shù)字轉(zhuǎn)換器 |
| 文件頁數(shù)： | 18/20頁 |
| 文件大?。?/td> | 196K |
| 代理商： | ADS1250 |
18
ADS1250
SOFTWARE GAIN
The excellent performance, flexibility, and low cost of the
ADS1250 allows the converter to be considered for designs
which would not normally need a 20-bit ADC. For example,
many designs utilize a 12-bit converter and a high gain INA
or PGA for digitizing low amplitude signals. For some of these
applications, the ADS1250 by itself may be a solution. The
digital result of the converter can simply be shifted up by “n”
bits in the main controller, resulting in a gain of “n” times G,
where G is the gain setting. While this type of manipulation of
the output data is obvious, it is easy to miss how much the gain
can be increased in this manner on a 20-bit converter. For
example, shifting the result by 4 bits when the ADS1250 is set
to a gain of 8 results in an effective gain of 128.
Isolation
The serial interface of the ADS1250 provides for simple
isolation methods. An example of an isolated four-wire
interface is shown in Figure 19. The ISO150 is used to
transmit the digital clocks over the isolation barrier. In
addition, the digital output of the ADS1250 can, in some
cases, drive opto-isolators directly. Note that DOUT is tri-
stated for the majority of the conversion period and the opto-
isolator connection must take this into account.
FIGURE 24. Isolated Four-Wire Interface.
+V
IN
–V
IN
AGND
+V
S
V
REF
DSYNC
+V
D
DGND
DGND
G1
G0
CS
DRDY
CLK
SCLK
DOUT
V
DD1
V
Circuit
AGND
AV
DD
DGND
I
D
1
R
1
V
S
G
B
R
1
D
1
D
2
R
2
G
A
V
S
R
2
D
2
V
DD2
V
DD1
V
DD1
V
DD2
DGND
DGND
DGND
AGND
DOUT
SCLK
V
DD2
V
DD1
V
DD2
DGND
DGND
DGND
AGND
CLK
DRDY
I
D
1
R
1
V
S
G
B
R
1
D
1
D
2
R
2
G
A
V
S
R
2
D
2
ADS1250
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADS1250U | 20-Bit Data Acquisition System ANALOG-TO-DIGITAL CONVERTER |
| ADS1252 | 24-Bit, 40kHz ANALOG-TO-DIGITAL CONVERTER |
| ADS1252U | 24-Bit, 40kHz ANALOG-TO-DIGITAL CONVERTER |
| ADS1252K5 | 24-Bit, 20kHz, Low-Power ANALOG-TO-DIGITAL CONVERTER |
| ADS1254 | 24-Bit, 20kHz, Low Power ANALOG-TO-DIGITAL CONVERTER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADS1250U | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC SpeedPlus 20-Bit Data Acq System 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS1250U/1K | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC SpeedPlus 20-Bit Data Acq System 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS1250U/1KG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC SpeedPlus 20-Bit Data Acq System 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS1250UG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC SpeedPlus 20-Bit Data Acq System 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS1251 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:24-Bit, 20kHz, Low-Power ANALOG-TO-DIGITAL CONVERTER |
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