參數(shù)資料
型號(hào)： THS1206DA
廠商： Texas Instruments, Inc.
英文描述： 12-BIT 6 MSPS, SIMULTANEOUS SAMPLING ANALOG-TO-DIGITAL CONVERTERS
中文描述： 12 - MSPS的第6位，同步采樣模擬數(shù)字轉(zhuǎn)換器
文件頁數(shù)： 30/41頁
文件大小： 564K
代理商： THS1206DA
THS1206
12-BIT 6 MSPS, SIMULTANEOUS SAMPLING
ANALOG-TO-DIGITAL CONVERTERS
SLAS217D – MAY 1999 – REVISED APRIL 2000
30
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
analog input configuration and reference voltage (continued)
A differential operation is desired for many applications. Figure 18 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 18. Differential Input Stage
In comparison to the single-ended configuration it can be seen that the voltage, V
ADC
, which is applied at the
input of the ADC is the difference between the input AINP and AINM. This means that V
REFM
defines the
minimum voltage (V
ADC
) which can be applied to the ADC. V
REFP
defines the maximum voltage (VADC) which
can be applied to the ADC. The voltage V
ADC
can be calculated as follows:
VADC
ABS(AINP–AINM)
An advantage to single-ended operation is that the common-mode voltage
VCM
AINM
AINP
2
can be rejected in the differential configuration, if the following condition for the analog input voltages is true:
AGND
AINM, AINP
AVDD
1 V
VCM
4 V
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 20.
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
THS1206-EP 制造商:TI 制造商全稱:Texas Instruments 功能描述:12-BIT 6 MSPS, SIMULTANEOUS SAMPLING ANALOG-TO-DIGITAL CONVERTERS
THS1206EVM 制造商:Texas Instruments 功能描述:12-BIT 6MSPS QUAD CH. LOW POWER ADC EVM - Bulk 制造商:Texas Instruments 功能描述:THS1206 EVAL MODULE
THS1206IDA 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 6 MSPS Quad Channel 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
THS1206IDA 制造商:Texas Instruments 功能描述:A/D CONVERTER ((NW))
THS1206IDAG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 6 MSPS Quad Channel 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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