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.