1 Features
1• Low noise:
4 nV/√Hz at 10 kHz
4.7 fA/√Hz at 1 kHz
• Low distortion: –109 dB (0.00035%)
• Wide gain bandwidth: 13 MHz
• Rail-to-rail input and output
• Low supply-voltage operation: 1.7 V to 5.5 V
• Low input capacitance
– Differential: 6 pF
– Common-mode: 2.5 pF
• Low input-bias current: 10 pA
• Low power supply current: 940 μA
• Industry-standard packages: SC-70 and SOT-23

2 Applications
• Microphone preamplifier
• Auxiliary line input and output
• Active filter circuit
• Transimpedance amplifier
• Voltage buffer

3 Description
The OPA1671 is a wide-bandwidth, low-noise, lowdistortion,
audio operational amplifier that provides
rail-to-rail input and output operation. This device
offers an excellent combination of low voltage noise,
current noise, and input capacitance, allowing the
device to deliver high performance in a wide array of
audio and industrial applications. The unique internal
topology of the OPA1671 delivers very low distortion
(–109 dB), while only consuming 940 μA of power
supply current. The wide bandwidth (13 MHz) and
high slew rate (5 V/μs) of OPA1671 makes this
device an excellent choice for high gain audio and
industrial signal conditioning.
The OPA1671 is available in the SC-70 and SOT-23
packages and is specified over the industrial
temperature range (–40°C to +125°C).