OPAx387 Ultra-High Precision, Zero-Drift, Low-Input-Bias-Current Op Amps

1 Features

• Ultra-low offset voltage: ±2 µV (maximum, tested)

• Zero drift: ±0.003 µV/°C

• Low-input bias current: 150 pA (maximum, tested)

• Low noise: 8.5 nV√Hz at 1 kHz

• Common-mode input range ±100 mV beyond

supply rails

• Gain bandwidth: 5.7 MHz

• Quiescent current: 570 μA per amplifier

• Single supply: 1.7 V to 5.5 V

• Dual supply: ±0.85 V to ±2.75 V

• 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 OPA387, OPA2387, and OPA4387 (OPAx387)

family of precision amplifiers offers state-of-the-art

performance. With zero-drift technology, the OPAx387

offset voltage and offset drift provide unparalleled

long-term stability. With a mere 570 µA of quiescent

current, the OPAx387 are able to achieve 5.7 MHz

of bandwidth, a broadband noise of 8.5 nV/√Hz,

are crucial to achieve extremely-high precision and

no degradation of linearity in 16-bit to 24-bit analog

to digital converters (ADCs). The OPAx387 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.

Device Information

PART NUMBER

PACKAGE(1)

BODY SIZE (NOM)

OPA387

DFN (6)(2)

1.50 mm × 1.50 mm

SOT-23 (5)

2.90 mm × 1.60 mm

OPA2387

SOIC (8)(2)

4.90 mm × 3.90 mm

VSSOP (8)

3.00 mm × 3.00 mm

WSON (8)

2.00 mm × 2.00 mm

OPA4387

TSSOP (14)

5.00 mm × 4.40 mm

(1)

For all available packages, see the package option

addendum at the end of the data sheet.

(2)

Package is preview.

OPA387

ADC

Radiation

Detector

Object

The OPA387 as an Ultra-Low Offset, Low-Noise

ADC Driver

Input Offset Voltage (PV)

-2

-1.5

-1

-0.5

0

0.5

1

1.5

2

0

5

10

15

20

25

30

35

40

45

50

c110

Ultra-Low Input Offset Voltage

OPA387, OPA2387, OPA4387

SBOS984F – NOVEMBER 2020 – REVISED FEBRUARY 2022

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.