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参数资料
| 型号： | ADS1217IPFBR |
| 英文描述： | 8-Channel, 24-Bit ANALOG-TO-DIGITAL CONVERTER |
| 中文描述： | 8通道，24位模拟数字转换器 |
| 文件页数： | 25/28页 |
| 文件大小： | 458K |
| 代理商： | ADS1217IPFBR |
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ADS1217
SBAS260B
25
www.ti.com
±
V
PGA
REF
5V SUPPLY ANALOG INPUT
(1)
GENERAL EQUATIONS
DIFFERENTIAL
INPUT VOLTAGES
(2)
PGA OFFSET
RANGE
FULL-SCALE
RANGE
DIFFERENTIAL
INPUT VOLTAGES
(2)
PGA SHIFT
RANGE
GAIN SETTING
FULL-SCALE RANGE
1
2
4
8
10V
5V
2.5V
1.25V
0.625V
312.5mV
156.25mV
78.125mV
±
5V
±
2.5V
±
1.25V
±
0.625V
±
312.5mV
±
156.25mV
±
78.125mV
±
39.0625mV
±
2.5
±
1.25V
±
0.625V
±
312.5mV
±
156.25mV
±
78.125mV
±
39.0625mV
±
19.531mV
16
32
64
128
NOTES: (1) With a 2.5V reference. (2) The ADS1217 allows common-mode voltage as long as the absolute input voltage on A
IN+
or A
IN
–
does not go below
AGND or above AV
DD
.
TABLE V. Full-Scale Range versus PGA Setting.
Full-Scale Range (FSR)
—
as with most A/D converters, the
full-scale range of the ADS1217 is defined as the
“
input
”
,
which produces the positive full-scale digital output minus the
“
input
”
, which produces the negative full-scale digital output.
The full-scale range changes with gain setting, see Table V.
For example, when the converter is configured with a 2.5V
reference and is placed in a gain setting of 2, the full-scale
range is: 2
[1.25V (positive full-scale) minus
–
1.25V (nega-
tive full-scale)] = 5V.
Least Significant Bit (LSB) Weight
—
this is the theoretical
amount of voltage that the differential voltage at the analog
input would have to change in order to observe a change in
the output data of one least significant bit. It is computed as
follows:
Full
=
LSB Weight
ScaleRange
N
2
where N is the number of bits in the digital output.
t
DATA
—
the inverse of f
DATA
, or the period between each data
output.
4V
PGA
REF
±
2V
PGA
REF
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| ADS1217IPFBT | 8-Channel, 24-Bit ANALOG-TO-DIGITAL CONVERTER |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADS1217IPFBRG4 | 功能描述:模数转换器 - ADC 8-Ch 24B 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 |
| ADS1217IPFBT | 功能描述:模数转换器 - ADC 8-Ch 24-Bit 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 |
| ADS1217IPFBT | 制造商:Texas Instruments 功能描述:A/D Converter (A-D) IC 制造商:Texas Instruments 功能描述:IC, ADC, 24BIT, 780SPS, TQFP-48 |
| ADS1217IPFBTG4 | 功能描述:模数转换器 - ADC 8-Ch 24-Bit 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 |
| ADS1218 | 制造商:BB 制造商全称:BB 功能描述:8-Channel, 24-Bit ANALOG-TO-DIGITAL CONVERTER with FLASH Memory |
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