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.