The 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)
Parameter:
-
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.
Sign in 
