mpx5700dp output can use 5Voltage in datasheet but
i diagnose pin1(OUT) to only max 1Voltage when i use pin3(5V),pin2(GND) without pin4,5,6
attact the circuit i used.
is it wrong method?
Your connection is correct.
V1, V2 and Vex pins are used for factory trimming and we recommend to leave these pins unconnected/floating.
Only pin #1 (Vout), pin #2 (Ground) and pin #3 (Vs) are required as shown in Figure 1 of the data sheet.
The MPX5700DP measures the difference between pressures applied simultaneously to opposite sides of the diaphragm:
The transfer function and characteristic: