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RTDs, Thermocouples, and Pressure Measurements

 We are decided to develop a thermometer for that one we needed of microcontroller, parametric is given below. we need to measure presure, rtd, thermocouples, thermistors, and 0-20 mA. Our end application is measuring the temperature -100  to 1800 degrees. So can you suggest a suitable microcontroller for our product? 

Name                                                         Value
 
1) Program Memory Type                       =   Flash
2) Program Memory Size (KB)                =   32
3) CPU Speed (MIPS/DMIPS)                =   20
4) SRAM (KB)                                         =   2,048
5) Data EEPROM/HEF (bytes)               =   1024
6) Digital Communication Peripherals    =  1-UART, 2-SPI, 1-I2C
7) ADC                                                    =  16/24 bit ,2 channel 
8) Temperature Range (°C)                    = -40 to 85
9) Operating Voltage Range (V)             =  1.8 to 5.5
10) Pin Count                                          =  32
11) Low Power