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參數(shù)資料
| 型號： | 5962-9957701NXD |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | ADC |
| 英文描述： | 4-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO32 |
| 封裝： | GREEN, PLASTIC, TSSOP-32 |
| 文件頁數(shù)： | 29/43頁 |
| 文件大小： | 426K |
| 代理商： | 5962-9957701NXD |
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THS1206
SLAS217H – MAY 1999 – REVISED JULY 2003#
www.ti.com
35
A differential operation is desired for many applications. Figure 41 shows a simplified model for the analog inputs AINM
and AINP, which are configured for differential operation. This configuration has a few advantages, which are discussed
in the following paragraphs.
12-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 (VADC)
which can be applied to the ADC. VREFP defines the maximum voltage (VADC), 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 also Figure 45.
SINGLE-ENDED MODE OF OPERATION
The THS1206 can be configured for single-ended operation using dc- or ac-coupling. In either case, the input of the
THS1206 must be driven from an operational amplifier that does not degrade the ADC performance. Because the THS1206
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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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 5962-9958101QXC | 功能描述:LVDS 接口集成電路 RoHS:否 制造商:Texas Instruments 激勵器數(shù)量:4 接收機數(shù)量:4 數(shù)據(jù)速率:155.5 Mbps 工作電源電壓:5 V 最大功率耗散:1025 mW 最大工作溫度:+ 85 C 封裝 / 箱體:SOIC-16 Narrow 封裝:Reel |
| 5962-9958301Q2A | 制造商:Texas Instruments 功能描述:DC DC Cntrlr Single-OUT PWM DC to DC Controller 3.6V to 40V Input 20-Pin LCCC Tube |
| 5962-9958301QPA | 制造商:Texas Instruments 功能描述:DC DC Cntrlr Single-OUT PWM DC to DC Controller 3.6V to 40V Input 8-Pin CDIP Tube |
| 5962-9958302Q2A | 制造商:Texas Instruments 功能描述:DC DC Cntrlr Single-OUT PWM DC to DC Controller 3.6V to 40V Input 20-Pin LCCC Tube |
| 5962-9958302QPA | 制造商:Texas Instruments 功能描述:DC DC Cntrlr Single-OUT PWM DC to DC Controller 3.6V to 40V Input 8-Pin CDIP Tube |
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