The INA333 is a low-power, precision instrumentation amplifier offering excellent accuracy. The versatile 3-op amp design, small size, and low power make it ideal for a wide range of portable applications.
A single external resistor sets any gain from 1 to 1000. The INA333 is designed to use an industry-standard gain equation: G = 1 + (100kΩ/RG).
The INA333 provides very low offset voltage (25 µV at 25°C, G ≥ 100), excellent offset voltage drift (0.2 µV/°C, G ≥ 100), and high common-mode rejection (100 dB at 25°C, G ≥ 10). It operates with power supplies as low as 1.8 V (±0.9V), and quiescent current is only 50 µA—ideal for battery-operated systems. Using autocalibration techniques to ensure excellent precision over the extended industrial temperature range, the INA333 also offers exceptionally low noise density (55 nV/√Hz) that extends down to dc.
The INA333 is is specified over the TA = –55°C to +210°C temperature range.
| Number of channels | 1 |
| Vs (max) (V) | 5.5 |
| Vs (min) (V) | 1.8 |
| Input offset (±) (max) (µV) | 25 |
| Voltage gain (min) (V/V) | 1 |
| Voltage gain (max) (V/V) | 1000 |
| Noise at 1 kHz (typ) (nV√Hz) | 50 |
| Features | Low power, Zero Drift |
| CMRR (min) (dB) | 80 |
| Input offset drift (±) (max) (V/°C) | 0.0000001 |
| Input bias current (±) (max) (nA) | 0.2 |
| Iq (typ) (mA) | 0.198 |
| Bandwidth at min gain (typ) (MHz) | 0.15 |
| Gain error (±) (max) (%) | 0.5 |
| Operating temperature range (°C) | -55 to 210 |
| Rating | High Temp |
| Type | Resistor |
| Gain nonlinearity (±) (max) (%) | 0.001 |
| Output swing headroom (to negative supply) (typ) (V) | 0.05 |
| Output swing headroom (to positive supply) (typ) (V) | -0.05 |
| Input common mode headroom (to negative supply) (typ) (V) | 0.1 |
| Input common mode headroom (to positive supply) (typ) (V) | -0.1 |
| Noise at 0.1 Hz to 10 Hz (typ) (µVPP) | 2 |
| B0QFN (JD) | 8 | 75.8373 mm² 10.29 x 7.37 |
| CFP (HKJ) | 8 | 38.985 mm² 6.9 x 5.65 |
| CFP (HKQ) | 8 | 38.985 mm² 6.9 x 5.65 |
| DIESALE (KGD) | — | See data sheet |
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