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| 型号： | THS1206CDA |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | ADC |
| 英文描述： | 4-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO32 |
| 封装： | GREEN, PLASTIC, TSSOP-32 |
| 文件页数： | 29/43页 |
| 文件大小： | 722K |
| 代理商： | THS1206CDA |
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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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相关代理商/技术参数 |
参数描述 |
|---|---|
| THS1206CDA | 制造商:Texas Instruments 功能描述:12BIT ADC 6MSPS CMOS SMD 1206 制造商:Texas Instruments 功能描述:12BIT ADC, 6MSPS CMOS, SMD, 1206 制造商:Texas Instruments 功能描述:12BIT ADC, 6MSPS CMOS, SMD, 1206; Resolution (Bits):12bit; Sampling Rate:6MSPS; Supply Voltage Type:Single; Supply Voltage Min:4.75V; Supply Voltage Max:5.25V; Supply Current:36mA; Digital IC Case Style:TSSOP; No. of Pins:32; Input ;RoHS Compliant: Yes |
| THS1206CDA | 制造商:Texas Instruments 功能描述:12 bit simultaneous sampling analog/digi |
| THS1206CDAG4 | 功能描述:模数转换器 - ADC 12-Bit 6 MSPS Quad Channel RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| THS1206CDAR | 功能描述:模数转换器 - ADC 12-Bit 6 MSPS Quad Channel RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| THS1206CDARG4 | 功能描述:模数转换器 - ADC 12-Bit 6 MSPS Quad Channel RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
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