参数资料
型号: ADS7945SRTER
厂商: TEXAS INSTRUMENTS INC
元件分类: ADC
英文描述: 2-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PQCC16
封装: GREEN, PLASTIC, QFN-16
文件页数: 20/49页
文件大小: 1322K
代理商: ADS7945SRTER
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
相关PDF资料
PDF描述
ADS7945SRTET 2-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PQCC16
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
相关代理商/技术参数
参数描述
ADS7945SRTET 功能描述:模数转换器 - ADC 14B,2MSPS,DUAL-CH, UNIPOLAR,DIF,SAR ADC 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
ADS7946 制造商:TI 制造商全称: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:数据转换 IC 开发工具 ADS7946 PERF DEM KIT RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V
ADS7946SRTER 功能描述:模数转换器 - ADC 14B,2MSPS,DUAL-CH, UNIP,PSE-DIF,SAR ADC 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
ADS7946SRTET 功能描述:模数转换器 - ADC 14B,2MSPS,DUAL-CH, UNIP,PSE-DIF,SAR ADC 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