





INA333 Human Micro Signal Multifunctional Three Op Amp Precision Instrumentation Amplifier Module
Product FeatureThe INA333 is a low power precision instrumentation amplifier with excellent accuracy. The gain can be set from 1 to 1000 with a single external resistor.
The INA333 is designed to use industry-standard gain equations: G=1+ (100kΩ/RG)
Low offset voltage: 25μV (max), G ≥ 100
Low drift: 0.1μV/°C, G ≥ 100
Low noise: 50nV/√Hz, G ≥ 100
High common mode rejection ratio (CMRR): 100dB (minimum), G ≥ 10
Low input bias current: 200pA (max)
Low quiescent current: 50μA
Input voltage: (V–) + 0.1V to (V+) – 0.1V
Output voltage: (V–) + 0.05V to (V+) – 0.05V
Operating temperature range: -40°C to +125°C
Filtered radio frequency interference (RFI) input
Power supply range: 1.8V to 5.5V (single power supply), ±0.9V to ±2.75V (dual power supply)
The on-board 3.3V low-dropout LDO regulator chip directly supplies power to the INA333 amplifier. The amplifier uses a single-ended power supply mode, V- is connected to GND, and V+ is connected to the 3.3V output of the LDO. The amplifier uses a 3.3V single-ended power supply.
VIN+ non-inverting input, VIN-non-inverting input. R3 on the board is not soldered. VCC regulator LDO input 5V.





El microchip está bien, pero el circuito necesita ser modificado. Esto es más bien una muestra de demostración.

Rebajado. De 5 piezas, 3 no funcionan. Se comportan de la misma manera, pero no es INA. No revisé el resto.