FEATURES
• Low Offset Voltage: 25 μV (max at 25°C),
G ≥ 100
• Low Drift: 0.2 μV/°C, G ≥ 1000
• Low Noise: 55 nV/√Hz, G ≥ 100
• High CMRR: 100 dB (min at 25°C), G ≥ 10
• 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+) –0.05V
• Low Quiescent Current: 198 μA
• RFI Filtered Inputs

APPLICATIONS
• Down-Hole Drilling
• High Temperature Environments

SUPPORTS EXTREME TEMPERATURE
APPLICATIONS
• Controlled Baseline
• One Assembly/Test Site
• One Fabrication Site
• Available in Extreme (–55°C/210°C)
Temperature Range (1)
• Extended Product Life Cycle
• Extended Product-Change Notification
• Product Traceability
• Texas Instruments' high temperature products
utilize highly optimized silicon (die) solutions
with design and process enhancements to
maximize performance over extended temperatures.

DESCRIPTION
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.