- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄165354 > ADS7945SRTET (TEXAS INSTRUMENTS INC) 2-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PQCC16 PDF資料下載
參數(shù)資料
| 型號： | ADS7945SRTET |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | ADC |
| 英文描述： | 2-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PQCC16 |
| 封裝： | GREEN, PLASTIC, QFN-16 |
| 文件頁數(shù)： | 17/49頁 |
| 文件大?。?/td> | 1322K |
| 代理商： | ADS7945SRTET |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁當前第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁
SAR
ADC
AVDD
AIN0P
AVDD
AIN0N
AVDD
AIN1N
AVDD
AIN1P
GND
ADS7945
SAR
ADC
AVDD
AIN0
AVDD
AIN0GND
AVDD
AIN1GND
AVDD
AIN1
GND
ADS7946
SBAS539B
– JUNE 2011 – REVISED SEPTEMBER 2011
OVERVIEW
The ADS7945 and ADS7946 are 14-bit, miniature, dual-channel, low-power SAR ADCs. The ADS7945 is a
differential input device and the ADS7946 is a single-ended device with ground sensing input. These devices
feature very low power consumption at rated speed. The PDEN pin enables an auto power-down mode that
further reduces power consumption at lower speeds.
MULTIPLEXER AND ADC INPUT
The ADS7945/46 devices feature differential/single-ended inputs respectively with a double-pole, double-throw
multiplexer. The analog input circuit shown in Figure 75 is similar for for ADS7945 and ADS7946.
The ADS7945 features a differential input. Each of the positive (AINxP) and negative (AINxN) inputs can swing
from
–VREF/2 to +VREF/2 around the common-mode voltage (AINxP + AINxN)/2 so that AINxP and AINxN swing
in opposite directions equally from common-mode voltage (differential input swing VAINxP – VAINxN ranges
from
–VREF to +VREF). The ADC converts the difference in voltage: VAINxP – VAINxN. This feature allows the
devices to reject the common-mode noise in the input signal.
For the ADS7946, the ground sense inputs (AINxGND) can accept swings of
±0.2 V whereas the inputs (AINx)
allow signals in the range of 0 V to VREF over the ground sense input. The ADC converts the difference in
voltage: VAINx – VAINxGND. This feature can be used in multiple ways. For example, two signals can be connected
from different sensors with unequal ground potentials (within
±0.2 V) to a single ADC. The ADC rejects the
common-mode offset and noise. This feature also allows the use of a single-supply op amp. The signal and the
AINxGND input can be offset by +0.2 V, which provides the ground clearance required for a single-supply op
amp.
Figure 75 shows the electrostatic discharge (ESD) diodes to supply and ground at every analog input. Make sure
that these diodes do not turn on by keeping the supply voltage within the specified input range.
Figure 75. Analog Inputs
24
Copyright
2011, Texas Instruments Incorporated
相關PDF資料 |
PDF描述 |
|---|---|
| ADS7953SBRHBT | 16-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PQCC32 |
| ADS7953SRHBT | 16-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PQCC32 |
| ADS803E | 1-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28 |
| ADS8342IBPFBTG4 | 4-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PQFP48 |
| ADS8412IPFBTG4 | 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PQFP48 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ADS7946 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:14-Bit, 2 MSPS, Dual-Channel, Differential/Single-Ended, Ultralow-Power Analog-to-Digital Converters |
| ADS7946EVM-PDK | 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 ADS7946 PERF DEM KIT RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V |
| ADS7946SRTER | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 14B,2MSPS,DUAL-CH, UNIP,PSE-DIF,SAR ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS7946SRTET | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 14B,2MSPS,DUAL-CH, UNIP,PSE-DIF,SAR ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS7947 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:12/10/8-Bit 2MSPS, Dual-Channel Unipolar Pseudo-Differential Ultralow-Power SAR Analog-to-Digital Converters |
發(fā)布緊急采購，3分鐘左右您將得到回復。