INA333-Q1

• AEC-Q100 qualified for automotive applications:
  • Temperature grade 1: –40°C ≤ T_A ≤ +125°C
• Low offset voltage: 25 µV (maximum), G ≥ 100
• Low drift: 0.1 µV/°C, G ≥ 100
• Low noise: 50 nV/√Hz, G ≥ 100
• High CMRR: 96 dB (minimum), G ≥ 10
• Low input bias current: 280 pA (maximum)
• Supply range: 1.8 V to 5.5 V
• Input voltage: (V–) + 0.1 V to (V+) – 0.1 V
• Output range: (V–) + 0.05 V to (V+) – 0.05 V
• Low quiescent current: 50 µA
• Operating temperature: –40°C to +125°C
• RFI filtered inputs
• Package: 8-Pin VSSOP

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The INA333-Q1 is a low-power, precision instrumentation amplifier offering excellent accuracy. The three-op-amp design, small size, and low power make this device an excellent choice for automotive applications that require precise measurements, such as current leakage detection. This device is also a great choice for applications that use resistive bridge sensors.

A single external resistor sets any gain from 1 to 1000. The INA333-Q1 is designed to use an industry-standard gain equation: G = 1 + (100 kΩ / R_G).

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 (96 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. Auto-calibration techniques maintain excellent precision over the automotive temperature range. The INA333-Q1 provides a very low peak-to-peak noise of 1 µV.

The INA333-Q1 device is available in an 8-pin VSSOP package and is specified over the T_A = –40°C to +125°C temperature range.