OPA1671 13-MHz, Low-Noise, Rail-to-Rail, Audio Operational Amplifier

1 Features

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, low-distortion, 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).

Device Information⁽¹⁾

PART NUMBER	PACKAGE	BODY SIZE (NOM)
OPA1671	SC-70 (5)	2.00 mm × 1.25 mm
OPA1671	SOT-23 (5)	2.90 mm × 1.60 mm

For all available packages, see the package option addendum at the end of the data sheet.