Hello All,
I am using INA826AIDRGR in SON package with thermal pad. The part is connected as Wheatstone bridge load cell amplifier. Circuit diagram is exactly like recommended in INA826EVM,
Gain is set to 1000 with 49.9 Ohm across pins 2 and 3. INA is powered by 5V across pins 8 and 5 and Wheatstone bridge in load sell is powered by 10V. -10V, Pin 5 and ref Pin 6 are connected together, to the board's GND plane and to thermal pad. However, the amplifier does not respond to load change.
The only deviation from EVM is that I am using an SON package with thermal pad (pin 9) connected to ground plane. Is that correct, if so, can anyone suggest what may be wrong?
Please help!
Thanks!
Vladimir