ADC digital converter chip is suitable for industrial equipment, medical equipment and instruments MAX31865ATP+T

概述
MAX31865 是一种易于使用的电阻到数字
转换器,专为优化铂电阻温度
探测器(RTDs)而设计.外部电阻设置所使用的RTD的灵敏度
,精密Δ-ΣADC将RTD电阻与参考
电阻的比率转换成数字形式.MAX31865的输入
受到过压故障的保护,最大可承受Q45V.
包括可编程检测RTD和电缆开路及
短路条件.
应用
● 工业设备
● 医疗设备
● 仪器

优点和特性
● 集成降低了系统成本,简化了设计
工作,减少了设计周期
• 简单地将铂热电阻转换为
数字值
• 处理100Ω至1kΩ(0°C时)的铂热电阻(PT100至PT1000) • 兼容2线,3线和4线传感器连接 • SPI兼容接口 • 20引脚TQFN和SSOP封装 ● 高精度有助于满足误差预算 • 15位ADC分辨率；标称温度 分辨率0.03125NC(由于热电阻非线性而有所不同) • 在所有工作条件下:总精度 0.5NC(满量程的0.05%)最大 • 全差分VREF输入
• 21毫秒(最大)转换时间
● 内置故障检测提高系统
可靠性
• ±45V输入保护
• 故障检测(开路RTD元件,RTD元件短接到
超出范围电压,或RTD元件短路)

绝对最大额定值
VDD 相对于 GND1 的电压范围 ............-0.3V 到 +4.0V
BIAS,REFIN+ 的电压范围,
REFIN-,ISENSOR .................................-0.3V 到 (VDD + 0.3V)
FORCE+,FORCE2,
FORCE-,RTDIN+,RTDIN- 相对于 GND1 的电压范围 ....-50V 到 +50V
DVDD 相对于 DGND 的电压范围 ........-0.3V 到 +4.0V
所有数字引脚的电压范围
相对于 DGND .............................-0.3V 到 (VDVDD + 0.3V)
连续功耗 (TA = +70NC)
TQFN (在 +70NC 以上每引脚 derate 34.5mW/NC)...............2758.6mW
SSOP (在 +70° C 以上每°C derate 11.9mW/°C)...............952.4mW
静电放电保护 (所有引脚,人体模型) ...................±2kV
工作温度范围 ........................-40°C至+125°C
结温 .....................................................+150°C
储存温度范围 ............................-65°C至+150°C
焊接温度(回流焊) ......................................+260°C
引脚温度(焊接,10秒) .................................+300°C
超过“绝对最大额定值”中列出的应力可能会导致器件永久损坏.这些是应力额定值,不保证在规格的运行部分之外的任何其他条件下器件的功能运行.
暴露于绝对最大额定值
长时间的额定条件可能会影响设备的可靠性.

Packaging and transportation instructions

- According to the standard export packaging.

Customers can choose from cartons, wooden cases and wooden pallets according to their own requirements.

Q&A

1. How to obtain the price?

We usually quote within 24 hours after receiving your inquiry (except weekends and holidays). If you are in urgent need of a price, please send us an email or contact us in any other way so that we can provide you with a quotation.

2. What is your delivery time?

This depends on the quantity of the order and the season in which you place the order. Usually, we can ship the goods within 7 to 15 days (for small batches), and for large batches, it takes about 30 days.

3. What are your payment terms?

Factory price, 30% deposit, 70%T/T payment before shipment.

4. What is the mode of transportation?

It can be transported by sea, air or express delivery (EMS, UPS, DHL, TNT, FEDEX, etc.). Please confirm with us before placing an order.

5. How do you help our business establish a long-term and good relationship?

We maintain good quality and competitive prices to ensure that our customers benefit.

2. We respect every customer as our friend. We do business with them sincerely and make friends with them, no matter where they come from.