OPA620 250MHz, Precision, Rail-to-Rail I/O, CMOS Operational Amplifier

1 Features

• Unity-gain bandwidth: 250MHz

• Wide bandwidth: 100MHz GBW

• High precision:

– Input offset voltage at 25

℃ : ±300μV

(maximum)

– Input offset voltage (-40

℃ to 125℃) : ±1mV

(maximum)

– Offset drift: 1.2µV/°C (typical)

• High slew rate: 190V/µs

• Low noise: 5.5nV/√Hz

• Rail-to-rail I/O

• High output current: > 100mA

• Low input bias current: 3pA

• Quiescent current: 5.1mA

• Thermal shutdown

• Supply range: 2.5V to 5.5V

2 Applications

• Voltage sensing

• Current sensing

• Active filter

• Photodiode transimpedance amplifier

• Ultrasound

• Optical networking, tunable laser

• High-speed integrator

• Analog-to-digital converter (ADC) input buffer

• Digital-to-analog converter (DAC) output amplifier

• Communications

3 Description

The single OPA620 is a high-speed, voltage-feedback

operational amplifier designed for current sensing

and precision applications. Offering unity-gain stability

and high output current drive, the OPA620 delivers

enhanced signal-chain precision across temperature,

exceeding the performance of conventional wide-

bandwidth CMOS amplifiers. Operating with a low

quiescent current of 5.1mA per channel, the OPA620

is suitable for power-sensitive applications.

The OPA620 operates from a single or dual supply

voltage ranging from 2.5V (±1.25V) to 5.5V (±2.75V).

It features a wide common-mode input range

extending beyond the supply rails, and delivers a rail-

to-rail output swing within 30mV of the positive and

negative supplies, enabling a wide dynamic range.

The OPA620 is available in a small 5-pin SOT-23

package and is specified for operation over an

extended temperature range of –40°C to +125°C.

Package Information

PART

NUMBER

CHANNEL

COUNT

PACKAGE(1)

PACKAGE SIZE(2)

OPA620

Single

DBV (SOT-23, 5)

2.9mm × 1.6mm

(1)

For all available packages, see Section 12.

(2)

The package size (length × width) is a nominal value and

includes pins, where applicable.

R

1

R

Sense

R

1

R

2

R

2

GND

V

CC

I

Sense

PGND

Out

GND

+

–

V

CC

OPA620

Low-Side Current Sensing

OPA620

SLOSEG2 – APRIL 2026

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.