1 Features
• AEC-Q100 qualified for automotive applications:
– Temperature grade 1: –40°C ≤ TA ≤ +125°C
• Functional Safety-Capable
– Documentation available to aid functional safety
system design
• 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

2 Applications
• Powertrain torque sensor
• Powertrain pressure sensor
• Powertrain temperature sensor
• Powertrain knock sensor
• Vehicle occupant detection sensor
• Driver vital sign monitoring
• Control-panel, force-sensor-based switches

3 Description
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 INA333-Q1 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 industrystandard
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 (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 TA = –40°C
to +125°C temperature range.