1 Features

• Low broadband noise: 3.5 nV/√Hz

• Low offset voltage: 500 μV (maximum)

• Low THD+N: 0.00015%

• Gain bandwidth: 10 MHz

• Rail-to-rail output

• Unity-gain stable

• Low IQ:

– OPA375: 890 μA/ch

– OPA2375/OPA4375: 990 μA/ch

• Wide supply range:

– OPA375: 2.25 V to 5.5 V

– OPA2375/OPA4375: 1.7 V to 5.5 V

• Low offset voltage drift: ±0.16 μV/°C

2 Applications

• Photodiode amplifiers

• Precision sensor front-ends

• ADC input-driver amplifiers

• Test and measurement equipment

• Sensor field transmitters

• Wearable consumer applications

• Audio equipment

• Medical instrumentation

• Active filters

3 Description

The OPAx375 family includes single (OPA375), dual

(OPA2375) and quad-channel (OPA2375) generalpurpose

CMOS operation amplifiers (op amp) that

provide an extremely low noise figure of 3.5 nV/√Hz, a

low offset of 500 μV (maximum) and a wide bandwidth

of 10 MHz. The low noise and wide bandwidth make

the OPAx375 family attractive for a variety of precision

applications that require a good balance between

cost and performance. Additionally, the input bias

current of the OPAx375 supports applications with

high source impedance.

The robust design of the OPAx375 family provides

ease-of-use to the circuit designer due to the unitygain

stability, integrated RFI/EMI rejection filter, no

phase reversal in overdrive conditions, and high

electrostatic discharge (ESD) protection (2-kV HBM).

Additionally, the resistive open-loop output impedance

allows for easy stabilization with much higher

capacitive loads.

This op amp is optimized for low-voltage operation

as low as 2.25 V (±1.125 V) for the OPA375 and

1.7 V (±0.85 V) for the OPA2375 and OPA4375. All

of the devices operate up to 5.5 V (±2.75 V), and

are specified over the temperature range of –40°C to

125°C.

The single-channel OPA375 is available in a smallsize

SC70-5 package. The dual-channel OPA2375 is

available in multiple package options including a tiny

1.5 mm × 2.0 mm X2QFN package.