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| 型号： | DS1244Y |
| 英文描述： | Low-Power, 24-Bit ANALOG-TO-DIGITAL CONVERTER |
| 中文描述： | 低功耗，24位模拟数字转换器 |
| 文件页数： | 15/19页 |
| 文件大小： | 292K |
| 代理商： | DS1244Y |
ADS1244
SBAS273
15
www.ti.com
WEIGH SCALE SYSTEM
Figure 19 shows an example of a weigh scale system. OPA1,
OPA2, R
G
, and R
F
form a differential gain stage to amplify the
load cell output. The gain is equal to (1 + 2 R
F
/R
G
). Depend-
ing on the load cell, the typical gain setting is from 100 to 250.
R
I
and C
I
form a single-pole low-pass filter to band-limit the
FIGURE 19. Weigh Scale System.
ADS1244
VREFP
AVDD
SCLK
DRDY/ DOUT
P1.2/TA1
P1.0/TA0
XIN
XOUT/TCLK
CLK
DVDD
VREFN
GND
AINP
AVCC
1.8V ~ 3.6V
DVCC
AVSS
MSP430Fx41x
P1.1/TA0/MCLK
AINN
EMI Filter
EMI Filter
EMI Filter
DVSS
EMI Filter
OPA1
(1)
OPA2
(1)
NOTE: (1) OPA2335 or OPA2277 recommended.
5V
R
F
R
F
R
G
C
I
R
I
R
VR2
R
VR1
0.1
μ
F
1
μ
F
0.1
μ
F
1
μ
F
0.1
μ
F
32.768kHz
0.1
μ
F
Load Cell
R
I
differential gain stage noise and reduce mechanical vibration
noise from the load cell. The cutoff frequency of the low-pass
filter should be as low as possible to minimize the overall
system noise. The reference voltage is typically generated by
dividing down the supply voltage (R
VR1
, R
VR2
). Use a bypass
capacitor located as close to VREFP as possible.
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相关代理商/技术参数 |
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| DS1244Y120 | 制造商:Maxim Integrated Products 功能描述: |
| DS1244Y-120 | 制造商:Maxim Integrated Products 功能描述: |
| DS1244Y-150 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| DS1244Y-200 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:256K NV SRAM with Phantom Clock |
| DS1244Y-70 | 功能描述:实时时钟 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
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