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參數(shù)資料
| 型號： | THS12082DA |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 12-BIT, 8 MSPS, SIMULTANEOUS SAMPLING ANALOG-TO-DIGITAL CONVERTERS |
| 中文描述： | 12位，8 MSPS的同步采樣模擬數(shù)字轉(zhuǎn)換器 |
| 文件頁數(shù)： | 28/38頁 |
| 文件大?。?/td> | 517K |
| 代理商： | THS12082DA |
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THS12082
12-BIT, 8 MSPS, SIMULTANEOUS SAMPLING ANALOG-TO-DIGITAL CONVERTERS
SLAS271 – MAY 2000
28
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
analog input configuration and reference voltage (continued)
A differential operation is desired for many applications. Figure 16 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 16. 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 18.
single-ended mode of operation
The THS12082 can be configured for single-ended operation using dc or ac coupling. In either case, the input
of the THS12082 must be driven from an operational amplifier that does not degrade the ADC performance.
Because the THS12082 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.
P
(2)
(3)
(4)
(5)
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| THS12082EVM | 功能描述:EVALUATION MODULE FOR THS12082 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 模數(shù)轉(zhuǎn)換器 (ADC) 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- ADC 的數(shù)量:1 位數(shù):12 采樣率（每秒）:94.4k 數(shù)據(jù)接口:USB 輸入范圍:±VREF/2 在以下條件下的電源（標(biāo)準(zhǔn)）:- 工作溫度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，軟件 |
| THS12082IDA | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12 Bit 8 MSPS Dual Ch 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 |
| THS12082IDAG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12 Bit 8 MSPS Dual Ch 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 |
| THS12082IDAR | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12 Bit 8 MSPS Dual Ch 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 |
| THS12082IDARG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12 Bit 8 MSPS Dual Ch 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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