Automotive low-power, zero-drift, precision instrumentation amplifier
The INA333-Q1 from Texas Instruments is a low-power, precision instrumentation amplifier offering excellent accuracy. The versatile three-operational-amplifier design, small size, and low power make this device an excellent choice for a wide range of automotive applications that use resistive bridge sensors.
A single external resistor sets any gain from one to 1000. The INA333-Q1 is designed to use an industry-standard gain equation: G = 1 + (100 kΩ / RG).
The INA333-Q1 provides very low offset voltage (25 µV, G ≥ 100), excellent offset voltage drift (0.1 µV/°C, G ≥ 100), and high common-mode rejection (100 dB at G ≥ 10). The device operates with power supplies as low as 1.8 V (±0.9 V) and quiescent current is only 50 µA, making this device an excellent choice for battery-operated systems.
Autocalibration techniques maintain excellent precision over the industrial temperature range. The INA333-Q1 also offers exceptionally low noise density (50 nV/√Hz) that extends down to dc.
The INA333-Q1 device is available in an 8-pin VSSOP package and is specified over the TA = -40 to +125°C temperature range.
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