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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

STMicroelectronics LF353N

Name: LF353N
Brand: STMicroelectronics
SKU: LF353N
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LF353N

Manufacturer:: STMicroelectronics

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 8-DIP (0.300", 7.62mm)

Datasheet:: LF353N.pdf

Description:: IC OPAMP JFET 2 CIRC 8MINI DIP

Quantity:: RFQ Add To RFQ list

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Inventory:3,444

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Product details

Overview

LF353N from STMicroelectronics is a dual JFET-input operational amplifier optimized for wide-bandwidth, low-input-current signal conditioning in precision analog circuits. It delivers 16 V/µs typical slew rate, ±15 V input common-mode range (up to V_CC+), and 10¹² Ω input resistance - enabling high-impedance sensor interfacing, active filtering, and audio pre-amplification at supply voltages up to ±18 V.

For engineers reviewing the LF353N datasheet, LF353N pinout, LF353N application, or LF353N equivalent, key selection considerations include its JFET-input bias current (20–200 pA), output short-circuit protection, internal frequency compensation, and DIP8 package compatibility with legacy through-hole designs requiring stable DC precision and AC performance up to 4 MHz GBP.

Technical Context

The LF353N integrates two matched high-voltage JFET input stages with bipolar output transistors on a single monolithic die, enabling rail-to-rail input voltage swing (±15 V) and differential input tolerance of ±30 V. Its internal compensation ensures unity-gain stability without external components while maintaining 45° phase margin.

Designed for operation from ±6 V to ±18 V supplies, it supports industrial temperature range (0°C to +70°C) and features latch-up-free behavior, high CMRR (70–86 dB), and 120 dB channel separation - critical for dual-channel instrumentation where crosstalk and thermal drift must be minimized.

Key Specifications

Parameter	Value and Actual Design Meaning
Slew Rate	16 V/µs typical - enables faithful reproduction of fast-rising signals (e.g., pulse amplifiers, active filters) without slew-induced distortion.
Input Bias Current	20–200 pA - preserves signal integrity in high-impedance source applications like photodiode amps or piezoelectric sensors.
Input Resistance	10¹² Ω - minimizes loading error when interfacing with passive RC networks or electrometer-grade sources.
Gain Bandwidth Product	4 MHz - supports stable closed-loop gain ≥10 at 400 kHz, suitable for audio-band active filters and transducer signal chains.
Common-Mode Range	±11 V to +15 V / –12 V - allows direct sensing of signals referenced above negative rail or near positive rail (e.g., single-supply biasing with level shift).
Output Short-Circuit Duration	Infinite - permits robust operation in test fixtures or transient-overload conditions without shutdown or damage.
Supply Voltage Range	±6 V to ±18 V - accommodates standard ±12 V and ±15 V analog rails while supporting lower-power ±9 V systems.

Pinout & Package

LF353N is supplied in an 8-pin plastic DIP (Dual In-line Package) with 0.3-inch body width and through-hole mounting. Pin 1 is output of amplifier A; pin 4 is V_CC–; pin 8 is V_CC+.

Pin/Terminal	Circuit Role	Design Meaning
1	Output 1	Amplifier A output node - drives loads up to 60 mA short-circuit current; requires no external compensation.
2	Inverting Input 1	High-impedance JFET gate of amplifier A - used for feedback configuration (e.g., inverting amplifier, integrator).
3	Non-inverting Input 1	High-impedance JFET gate of amplifier A - accepts high-Z sources without significant bias current error.
4	V_CC–	Negative supply rail connection - referenced to system ground midpoint in split-supply operation.
5	Non-inverting Input 2	High-impedance JFET gate of amplifier B - electrically isolated from amp A; supports independent dual-channel design.
6	Inverting Input 2	High-impedance JFET gate of amplifier B - enables separate feedback paths for differential or multi-stage topologies.
7	Output 2	Amplifier B output node - identical AC/DC specs to pin 1; channel separation >120 dB prevents inter-channel interference.
8	V_CC+	Positive supply rail connection - completes power path; thermal resistance junction-to-ambient is 85 °C/W (DIP8).

Key Features

Feature	Design Value
High Input Impedance JFET Stage	10¹² Ω input resistance and ≤200 pA bias current - eliminates loading errors in high-Z sensor front-ends (e.g., pH electrodes, capacitive touch).
Wide Common-Mode Input Range	Operates with inputs up to V_CC+ - enables direct interface to signals riding on positive rails (e.g., battery-monitoring shunt amplifiers).
Internal Frequency Compensation	Unity-gain stable without external components - simplifies PCB layout and reduces bill-of-materials for basic gain stages and buffers.
Output Short-Circuit Protection	Continuous safe operation into ground or either supply rail - improves reliability in lab equipment and automated test systems.
Latch-Up Free Operation	No destructive parasitic thyristor conduction under overvoltage or ESD stress - enhances field robustness in unshielded industrial environments.

Applications

Audio Pre-amplifier

Photodiode Transimpedance Amplifier

Use Scenario: Low-noise amplification of microphone or line-level signals before ADC sampling in consumer audio interfaces.

IC Role / Device Role / Timing Role: Dual-channel voltage amplifier providing gain ≥20 dB with <0.01% THD at 1 kHz and 2 V_PP output.

Use Value: JFET input avoids bias current-induced offset drift across temperature, preserving DC-coupled signal fidelity in headphone drivers and mixer circuits.

Use Scenario: Converting nanoampere photocurrent from silicon photodiodes into measurable voltage in optical smoke detectors.

IC Role / Device Role / Timing Role: Transimpedance amplifier with 1 MΩ–10 MΩ feedback resistor, leveraging 20 pA input bias current to minimize dark-current error.

Use Value: High input impedance prevents photodiode junction loading, maintaining linear responsivity and enabling sub-100 nA detection thresholds.

Active Bandpass Filter

Industrial Sensor Signal Conditioning

Use Scenario: Second-order bandpass filtering of vibration sensor outputs (e.g., accelerometers) in predictive maintenance systems.

IC Role / Device Role / Timing Role: Dual op-amp implementing twin-T or multiple-feedback topology with center frequency 1–10 kHz and Q ≥5.

Use Value: 4 MHz GBP and 16 V/µs slew rate ensure minimal phase distortion and step response fidelity within passband.

Use Scenario: Amplifying and level-shifting millivolt-level thermocouple or strain gauge bridge outputs for PLC analog input modules.

IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end stage with adjustable gain and offset null pins (pins 1 & 5).

Use Value: Offset null capability (via external 10 kΩ potentiometer) enables <3 mV initial V_IO trimming, meeting 0.1% full-scale accuracy requirements.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual JFET op-amp applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLC27L2CP	Lower supply current (1.4 µA vs. 3.2 mA), but only 1.7 V/µs slew rate and 850 kHz GBP.	Battery-powered portable instruments where ultra-low power outweighs bandwidth needs.	Select when standby current <2 µA is mandatory and signal bandwidth <100 kHz suffices.
TL072CP	Higher slew rate (13 V/µs), lower input offset voltage (3 mV max), but no offset null pins and narrower common-mode range (±12 V).	General-purpose audio and video signal processing where offset trimming is not required.	Prefer for cost-sensitive audio designs needing better DC specs and higher speed than LF353N, but lacking V_CC+ input capability.

Compared with TLC27L2CP and TL072CP, the LF353N uniquely combines V_CC+ input capability, infinite short-circuit tolerance, and dedicated offset null terminals - making it optimal for industrial sensor interfaces demanding rail-to-rail input flexibility and field-serviceable calibration.

Availability

LF353N is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, audio pre-amplification, and active filter design requiring stable component supply across extended temperature ranges and long-lifecycle production programs.

Supply support for LF353N includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in analog, microcontroller, power, and automotive ICs with vertical manufacturing and broad industrial certification coverage.

The LF353N belongs to ST's legacy precision analog op-amp family, designed specifically for general-purpose dual-channel applications requiring JFET input performance, ruggedness, and through-hole manufacturability in industrial and test equipment.

FAQ

What is the maximum supply voltage for LF353N?

The absolute maximum supply voltage is ±18 V, with recommended operating range of ±6 V to ±18 V. Exceeding ±18 V risks permanent damage. The device draws 3.2 mA total supply current at ±15 V, and thermal resistance is 85 °C/W (DIP8), so power dissipation must remain below 500 mW at +70°C ambient to avoid exceeding junction temperature limits.

Does LF353N require external compensation?

No - LF353N is internally compensated for unity-gain stability. No external capacitors or resistors are needed for stable operation at gains ≥1. This simplifies layout and eliminates tuning for basic configurations like voltage followers, inverting amplifiers, and active filters using standard RC feedback networks.

How is offset voltage adjusted on LF353N?

Offset voltage is trimmed using pins 1 and 5 (Offset Null 1 and Offset Null 2), connected to opposite ends of a 10 kΩ potentiometer with wiper grounded. Adjusting the potentiometer balances internal input stage mismatches, reducing initial V_IO from 13 mV max to <1 mV in calibrated systems - essential for precision DC-coupled measurement front-ends.

Can LF353N drive capacitive loads directly?

LF353N can drive ≤100 pF capacitive loads stably in unity-gain configuration, as verified by 45° phase margin and 0.1 µs rise time measurements. For larger loads (e.g., coaxial cables or ADC input capacitance >100 pF), a series isolation resistor (100–470 Ω) between output and load is recommended to maintain stability and prevent overshoot.

LF353N Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Obsolete

Amplifier Type:: J-FET

Number of Circuits:: 2

Output Type:: -

Slew Rate:: 16V/µs

Gain Bandwidth Product:: 4 MHz

-3db Bandwidth:: -

Current - Input Bias:: 20 pA

Voltage - Input Offset:: 3 mV

Current - Supply:: 1.4mA (x2 Channels)

Current - Output / Channel:: 40 mA

Voltage - Supply Span (Min):: 6 V

Voltage - Supply Span (Max):: 36 V

Operating Temperature:: 0°C ~ 70°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 8-Mini DIP

LF353N FAQ

1.How can I place an order for LF353N through Aetrix?

Please submit a Request for Quotation (RFQ) for LF353N on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for LF353N reliable?

The price and inventory of LF353N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LF353N is usually 5 days.

3.What payment methods are accepted for LF353N?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LF353N transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LF353N?

LF353N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LF353N order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for LF353N?

For technical support, including LF353N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LF353N requirements.

6.How does Aetrix verify that LF353N is sourced from the original manufacturer or authorized distributors?

All LF353N products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LF353N meets industry standards.

7.What is the process for return or replacement of LF353N?

All LF353N units undergo pre-shipment inspection (PSI). If there is an issue with LF353N, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The LF353N part is unused and in its original packaging.

Return procedure for LF353N:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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