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| 型号： | THS10082IDAG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | ADC |
| 英文描述： | 2-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO32 |
| 封装： | GREEN, PLASTIC, TSSOP-32 |
| 文件页数： | 26/37页 |
| 文件大小： | 350K |
| 代理商： | THS10082IDAG4 |
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THS10082
SLAS254B MAY 2002 REVISED NOVEMBER 2002
www.ti.com
32
10-Bit
ADC
VREFP
VREFM
AINP
Σ
VADC
AINM
+
Figure 41. Differential Input Stage
In comparison to the single-ended configuration it can be seen that the voltage (VADC) which is applied at the input of the
ADC is the difference between the input AINP and AINM. This means that VREFM defines the minimum voltage (AINM)
which can be applied to the ADC. VREFP defines the maximum voltage (AINP) which can be applied to the ADC. The voltage
VADC can be calculated as follows:
V
ADC +
ABS(AINP–AINM)
An advantage to single-ended operation is that the common-mode voltage
V
CM +
AINM
) AINP
2
can be rejected in the differential configuration, if the following condition for the analog input voltages is true:
AGND
v AINM, AINP v AV
DD
1V
v V
CM v
4V
In addition to the common-mode voltage rejection, the differential operation allows a dc-offset rejection which is common
to both analog inputs. See Figure 43.
SINGLE-ENDED MODE OF OPERATION
The THS10082 can be configured for single-ended operation using dc or ac coupling. In either case, the input of the
THS10082 must be driven from an operational amplifier that does not degrade the ADC performance. Because the
THS10082 operates from a 5-V single supply, it is necessary to level-shift ground-based bipolar signals to comply with its
input requirements. This can be achieved with dc and ac coupling. An application example is shown for dc-coupled level
shifting in the following section, dc coupling.
(2)
(3)
(4)
(5)
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相关代理商/技术参数 |
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| THS1009 | 制造商:TI 制造商全称:Texas Instruments 功能描述:10-BIT, 2 ANALOG INPUT, 8 MSPS, SIMULTANEOUS SAMPLING ANALOG-TO-DIGITAL CONVERTER |
| THS1009CDA | 制造商:TI 制造商全称:Texas Instruments 功能描述:10-BIT, 2 ANALOG INPUT, 8 MSPS, SIMULTANEOUS SAMPLING ANALOG-TO-DIGITAL CONVERTER |
| THS1009CDAG4 | 制造商:TI 制造商全称:Texas Instruments 功能描述:10-BIT, 2 ANALOG INPUT, 8 MSPS, SIMULTANEOUS SAMPLING ANALOG-TO-DIGITAL CONVERTER |
| THS1009CDAR | 制造商:TI 制造商全称:Texas Instruments 功能描述:10-BIT, 2 ANALOG INPUT, 8 MSPS, SIMULTANEOUS SAMPLING ANALOG-TO-DIGITAL CONVERTER |
| THS1009CDARG4 | 制造商:TI 制造商全称:Texas Instruments 功能描述:10-BIT, 2 ANALOG INPUT, 8 MSPS, SIMULTANEOUS SAMPLING ANALOG-TO-DIGITAL CONVERTER |
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