1 Features
• Ultra-low offset voltage: ±5μV (maximum)
• Zero drift: ±0.025μV/°C
• Low-input bias current: 50pA (maximum)
• Low noise: 32nV√Hz at 1kHz
• No 1/f noise: 650nVPP (0.1Hz to 10Hz)
• Common-mode input range ±100mV beyond
supply rails
• Gain bandwidth: 2.5MHz
• Quiescent current: 65μA per amplifier
• Single supply: 1.7V to 5.5V
• Dual supply: ±0.85V to ±2.75V
• EMI and RFI filtered inputs

2 Applications
• Electronic thermometer
• Weigh scale
• Temperature transmitter
• Ventilators
• Data acquisition (DAQ)
• Semiconductor test
• Lab and field instrumentation
• Merchant network and server PSU
• Analog input module
• Pressure transmitter

3 Description
The OPA383, OPA2383, and OPA4383 (OPAx383)
family of precision amplifiers offers state-of-the-art
performance. With zero-drift technology, the OPAx383
offset voltage and offset drift provide unparalleled
long-term stability. With a ultra-low 65μA of quiescent
current, the OPAx383 are able to achieve 2.5MHz
of bandwidth, a broadband noise of 32nV/√Hz, and
a 1/f noise at 650nVPP. These specifications are
crucial to achieve extremely-high precision and no
degradation of linearity in 16-bit to 24-bit analog
to digital converters (ADCs). The OPAx383 feature
flat bias current over temperature; therefore, little to
no calibration is needed in high input impedance
applications over temperature.
All versions are specified over the industrial
temperature range of –40°C to +125°C.