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

SOT-23 (5)

2.90 mm × 1.60 mm

DFN (6)(3)

1.50 mm × 1.50 mm

OPA2387

SOIC (8)(3)

4.90 mm × 3.90 mm

VSSOP (8)

3.00 mm × 3.00 mm

DFN (8)(3)

2.00 mm × 2.00 mm

OPA4387 (2)

TSSOP (14)(3)

5.00 mm × 4.40 mm

(1)

For all available packages, see the package option

addendum at the end of the data sheet.

(2)

Device is preview.

(3)

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

SBOS984D – NOVEMBER 2020 – REVISED OCTOBER 2021

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. UNLESS OTHERWISE NOTED, this document contains PRODUCTION

DATA.