Frequency (Hz)

1

10

100

1000

10

100

1k

10k

100k

OPA1

Electret

Microphone

Microphone

Cable

+

±

5 V

OPA1671

Output

10 µF

10 µF

10

NŸ

4.9

NŸ

10 µF

499

NŸ

15 pF

100

NŸ

100

NŸ

10 µF

1.58

NŸ

5 V

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Folder

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Now

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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.

OPA1671

SBOS931B – JANUARY 2019 – REVISED AUGUST 2019

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

1

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, 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

SOT-23 (5)

2.90 mm × 1.60 mm

(1) For all available packages, see the package option addendum

at the end of the data sheet.

Electret Microphone Preamplifier

OPA1671 Voltage Noise Density