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)： 20/49頁
文件大小： 1322K
代理商： ADS7945SRTET
2001
1FFF
0000
Positive
FSR
1LSB
-
0V
Negative
FSR+1LSB
DifferentialAnalogInput(AINxP
AINxN)
-
ADCCode(Hex)
3FFF
-1LSB
V
IN
SBAS539B
– JUNE 2011 – REVISED SEPTEMBER 2011
ADC TRANSFER FUNCTION
The ADS7945 is a differential input device and the ADS7946 is a single-ended input device. This section
describes the transfer characteristics for both devices.
The ADS7945 output is in twos compliment format. Figure 79 shows the ideal transfer characteristics for these
devices. Here, full-scale range for the ADC input (AINxP
– AINxN) is equal to twice the reference input voltage to
the ADC 2
× (VREF). 1 LSB is equal to 2 × (VREF/2
N), where N is the resolution of the ADC (N = 14 for the
ADS7945). The differential input of the ADC is bipolar around the common-mode voltage (AINxP + AINxN)/2 and
has a range of positive FSR (+VREF) to negative FSR (–VREF).
Figure 79. ADS7945 Transfer Characteristics
Copyright
2011, Texas Instruments Incorporated
27
Product Folder Link(s): ADS7945 ADS7946
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相關(guān)代理商/技術(shù)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(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
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(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
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
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