Mfr Part #:

LM381N

The LM381N is a low noise dual preamplifier from Texas Instruments, designed for amplifying low-level signals. It offers high gain and a wide supply range.

✓ Total Stock: 54 pcs

$ Price Range: $12.91

LM381N Available from 2 distributors

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Partservice ✓ Non-Authorised Inventory information	29 pcs On Request	29 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request
Fe Components ✓ Non-Authorised Inventory information	25 pcs On Request	25 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request

LM381N Specifications Quick View

Most important parameters for selection – full specs in datasheet.

SELECT ALL

Category	New Products
Manufacturer Name	Texas Instruments
Maximum Input Voltage	300 mVrms
Operating Temperature Range	0°C to 70°C
Package / Case	N
Power Dissipation	1.56 W
Supply Current	10 mA
Supply Voltage	9V - 40V

View Similar Products (0)

LM381N Description

Short technical summary and product information.

The LM381N is a dual preamplifier IC from Texas Instruments, engineered for applications demanding optimal noise performance when amplifying low-level signals. Each of the two amplifiers is independent, featuring internal power supply decoupling for superior rejection and channel separation.

Key electrical characteristics include a high open-loop gain of 112 dB and a wide supply voltage range from 9V to 40V. The device boasts a unity gain bandwidth of 15 MHz and a power bandwidth of 75 kHz at 20 Vp-p. It also provides a large output voltage swing of VCC - 2V (p-p) and features short-circuit protection.

With its low noise performance (0.5 mVrms total input noise) and high gain, the LM381N is suitable for various audio and instrumentation applications. The amplifier is internally compensated, with options for external compensation for narrow-band applications. It supports both differential and single-ended input configurations, offering design flexibility.

LM381N Quick Information

Product Type: Dual Preamplifier

Canonical Name: LM381N Low Noise Dual Preamplifier

Subcategory: Dual Preamplifier

LM381N Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

LM381N Estimated Pricing

Qty	Low	High
1+	$12.91	$12.91

Estimated market price range - modelled values for guidance only, not live distributor offers.

LM381N Features

Low noise dual preamplifier IC.
High open-loop gain of 112 dB.
Wide supply range from 9V to 40V.
Unity gain bandwidth of 15 MHz.
Excellent power supply rejection (120 dB).

LM381N Applications

Amplification of low-level signals.
Applications requiring optimum noise performance.
Audio preamplification circuits.
Instrumentation and sensor signal conditioning.

LM381N FAQs

7 frequently asked questions generated from this part’s specifications.

What is the typical open-loop voltage gain of the LM381N?

The typical open-loop voltage gain is 160,000 V/V for differential input and 320,000 V/V for single-ended input at 100 Hz.

What is the operating supply voltage range for the LM381N?

The LM381N operates from a wide supply voltage range of 9V to 40V.

What is the unity gain bandwidth of the LM381N?

The unity gain bandwidth for the LM381N is 15 MHz.

What is the typical total equivalent input noise for the LM381N?

The typical total equivalent input noise is 0.5 mVrms.

What is the operating temperature range of the LM381N?

The operating temperature range for the LM381N is 0°C to 70°C.

What is the RoHS status of the LM381N?

The LM381N is RoHS3 Compliant.

What is the Moisture Sensitivity Level (MSL) for the LM381N?

The Moisture Sensitivity Level (MSL) for the LM381N is 1.