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参数资料
| 型号： | ADS1225 |
| 厂商： | Analog Devices, Inc. |
| 英文描述： | 24-Bit Analog-to-Digital Converter with One- and Two-Channel Differential Inputs and Internal Oscillator |
| 中文描述： | 24位模拟数字转换器与单和双通道差分输入和内部振荡器 |
| 文件页数： | 3/24页 |
| 文件大小： | 398K |
| 代理商： | ADS1225 |
www.ti.com
ELECTRICAL CHARACTERISTICS
All specifications at T
A
= –40
°
C to +105
°
C, AVDD = +5V, DVDD = +3V, and V
REF
= +5V, unless otherwise noted.
ADS1225
ADS1226
SBAS346–MAY 2006
ADS1225, ADS1226
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Analog Input
Full-scale input voltage
AINP – AINN
±
V
REF
V
Buffer off; AINP, AINN with respect to GND
GND – 0.1
AVDD + 0.1
V
Absolute input voltage
Buffer on; AINP, AINN with respect to GND
GND + 0.05
AVDD – 1.5
V
Buffer off
2
M
G
M
Differential input impedance
Buffer on
1
Common-mode input impedance
Buffer off
4
System Performance
Resolution
24
Bits
High-Speed mode
75
100
125
SPS
(1)
Data rate
High-Resolution mode
12
16
22
SPS
(1)
Integral nonlinearity (INL)
End-point fit
0.0005
0.0020
% of FSR
(2)
Offset error
60
200
μ
V
Offset error drift
0.3
μ
V/
°
C
%
Gain error
0.004
0.025
Gain error drift
0.3
ppm/
°
C
dB
Common-mode rejection
At DC
85
95
Analog power-supply rejection
At DC, ± 10%
in AVDD
At DC, DVDD = 2.7V to 5.5V
95
dB
Digital power-supply rejection
80
dB
ppm of FSR,
rms
High-Speed mode
1.5
Noise
ppm of FSR,
rms
High-Resolution mode
0.4
Temperature Sensor
Temperature sensor voltage
T
A
= +25
°
C
106
mV
Temperature sensor coefficient
360
μ
V/
°
C
Voltage Reference Input
Reference input voltage
V
REF
= VREFP – VREFN
0.5
5
AVDD
V
Negative reference input
GND - 0.1
VREFP – 0.5
V
Positive reference input
VREFN + 0.5
AVDD + 0.1
V
Voltage reference impedance
1.5
M
(1)
(2)
SPS = samples per second.
FSR = full-scale range = 2
×
V
REF
.
3
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| ADS1225IRGVT | 功能描述:模数转换器 - ADC 24-Bit 100SPS 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 |
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| ADS1225IRGVTG4 | 功能描述:模数转换器 - ADC 24-Bit 100SPS 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 |
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