LF356N Series Monolithic JFET Input Operational Amplifiers

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LF356N

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Description

Series Monolithic JFET Input Operational Amplifiers

Technology: BiFET
Brand: National Semiconductor
DateCode: 02+
Package / Case: DIP8
Input Offset Voltage: 10 mV
Power Dissipation: 0.67 W
Mounting: Through Hole
Operating Temp Range: 0C to 70C
Package Type: PDIP
Packaging: Rail
Pin Count: 8
Number of Elements: 1
Common Mode Rejection Ratio: 80 dB
Operating Temperature Classification: Commercial
Input Bias Current: 0.2 nA
Slew Rate: 12 V/us
Power Supply Requirement: Dual
Rail/Rail I/O Type: No
Shut Down Feature: No
Rad Hardened: No
Single Supply Voltage (Min): Not Required V
Single Supply Voltage (Max): Not Required V
Single Supply Voltage (Typ): Not Required V
Dual Supply Voltage (Max): ?18 V
Power Supply Rejection Ratio: 80 dB
Voltage Gain in dB: 106.02 dB
Unity Gain Bandwidth Product: 5MHz

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The parameters and performance indicators of this product are sourced from the internet. In case of discrepancies, please refer to the manufacturer's technical specifications!！

Product Attributes

Parameter	Symbol	Min	Typical	Max	Unit
Supply Voltage	V_CC	-22	-	22	V
Input Offset Voltage	V_IO	-	2	-	mV
Input Bias Current	I_B	-	20	-	nA
Input Offset Current	I_OS	-	5	-	nA
Open-Loop Gain	A_VOL	-	100	-	dB
Slew Rate	SR	-	0.4	-	V/μs
Bandwidth (Unity Gain)	f_T	-	1.1	-	MHz
Power Supply Rejection Ratio	PSRR	-	80	-	dB
Common-Mode Rejection Ratio	CMRR	-	90	-	dB
Output Voltage Swing	V_OUT	-15	-	15	V
Quiescent Current	I_Q	-	1.5	-	mA
Operating Temperature Range	T_A	-40	-	125	°C

Instructions for Using LF356N:

Power Supply:
- The LF356N can operate with a supply voltage range from ±2.25V to ±22V.
- Ensure that the power supply is stable and within the specified range to avoid damage to the device.
Input Signals:
- The input signals should be within the common-mode input voltage range, which is typically from -V_CC + 1.5V to +V_CC - 1.5V.
- Avoid applying voltages outside this range to prevent damage or incorrect operation.
Output Load:
- The output can drive loads with impedances down to 2kΩ.
- For lower impedance loads, consider using a buffer or additional amplification stages.
Biasing:
- The LF356N has very low input bias and offset currents, making it suitable for high-impedance applications.
- Use appropriate biasing techniques to ensure the inputs are properly biased for the desired operation.
Stability:
- The LF356N is internally compensated for unity gain stability.
- For higher gain applications, ensure that the feedback network is designed to maintain stability.
Temperature Considerations:
- The operating temperature range is from -40°C to 125°C.
- Ensure that the device is not exposed to temperatures outside this range to avoid performance degradation or failure.
Handling:
- Handle the LF356N with care to avoid static discharge, which can damage the device.
- Use proper ESD protection when handling and soldering the device.
Mounting:
- Mount the LF356N on a PCB with adequate heat dissipation if operating at high power levels.
- Ensure that the PCB layout minimizes parasitic capacitance and inductance for optimal performance.

By following these guidelines, you can ensure reliable and efficient operation of the LF356N in your circuit designs.

(For reference only)

FEATURES

Advantages

● Replace Expensive Hybrid and Module FET Op Amps

● Rugged JFETS Allow Blow-out Free Handling Compared with MOSFET Input Devices

● Excellent for Low Noise Applications Using Either High or Low Source Impedance-very Low 1/f Corner

● Offset Adjust Does Not Degrade Drift or Common-mode Rejection as in Most Monolithic Amplifers

● New Output Stage Allows Use of Large Capacitive Loads(5,000 PF)without Stability Problems

● Intemal Compensation and Large Differentia lnput Voltage Capability

APPLICATIONS

● Precision High Speed Integrators

● Fast D/A and A/D Converters

● High Impedance Buffers

● Wideband, Low Noise, Low Drift Amplifiers

● Logarithmic Amplifiers

● Photocell Amplifiers

● Sample and Hold Circuits

DESCRIPTION

These are the first monolithic JFET input operational amplifiers to incorporate well matched, high voltage JFETS on the same chip with standard bipolar transistors ( BI-FETTM Technology ). These amplifiers feature low input bias and offset currents / low offset voltage and offset voltage drift , coupled with offset adjust which does not degrade drift or common-mode rejection , The devices are also designed for high slew rate, wide bandwidth, extremely fast settling time, low voltage and current noise and a low 1/f noise corner.

QUANTITY	UNIT PRICE	PLUS UNIT PRICE	TOTAL PRICE
≥1:	US $1.34100	US $1.20690	US $1.20690
≥5:	US $0.89400	US $0.80460	US $4.02300
≥10:	US $0.80460	US $0.72414	US $7.24140
≥20:	US $0.78225	US $0.70403	US $14.08060
≥50:	US $0.75990	US $0.68391	US $34.19550
≥100:	US $0.73755	US $0.66380	US $66.38000
≥200:	US $0.71520	US $0.64368	US $128.73600
≥500:	US $0.70626	US $0.63563	US $317.81500
≥1000:	US $0.69285	US $0.62357	US $623.57000

Substitute (equivalent) Product

Product Name	Description
LM358N	Dual, Low Power, Precision Operational Amplifier
TL081CN	Low Noise JFET Input Operational Amplifier
OPA234	Low Noise, High Speed, FET-Input Operational Amplifier
MCP6002T-E/P	Low Power, Rail-to-Rail Input/Output, Dual Operational Amplifier
AD820AN	Single-Supply, Low Noise, JFET Input Operational Amplifier

Product Usage

The LF356N is a high-performance, low-noise JFET-input operational amplifier that is widely used in various analog circuits due to its excellent characteristics such as high input impedance, low input bias current, and low noise. Here are some common applications and circuits where the LF356N is often used:

Instrumentation Amplifiers:
- Used in precision measurement systems where high input impedance and low noise are critical.
- Common in medical equipment, scientific instruments, and industrial control systems.
Active Filters:
- Used in audio processing, communication systems, and signal conditioning circuits.
- Can be configured as low-pass, high-pass, band-pass, or notch filters.
Signal Conditioning Circuits:
- Used to amplify and process weak signals from sensors such as thermocouples, strain gauges, and photodiodes.
- Often found in data acquisition systems and sensor interfaces.
Audio Circuits:
- Used in preamplifiers for microphones and other audio sources.
- Suitable for high-fidelity audio applications due to its low noise and high performance.
Transimpedance Amplifiers:
- Used to convert current from photodiodes or other current sources into voltage.
- Common in optical communication systems and photodetection circuits.
Precision Rectifiers:
- Used to convert AC signals to DC signals with minimal distortion.
- Often found in power supply circuits and signal processing applications.
Voltage Followers (Buffer Amplifiers):
- Used to isolate stages in a circuit, providing high input impedance and low output impedance.
- Useful in driving loads that require low impedance without loading the previous stage.
Oscillators:
- Used in sine wave oscillators, relaxation oscillators, and other types of oscillators.
- The high input impedance and low noise make it suitable for generating stable and clean signals.
Analog-to-Digital Converters (ADC) Interfaces:
- Used to condition signals before they are digitized by ADCs.
- Helps in reducing noise and improving the accuracy of the digital conversion.
Digital-to-Analog Converters (DAC) Interfaces:
- Used to buffer and amplify the output of DACs.
- Ensures that the analog signal is clean and stable.
Current Sources:
- Used to provide a constant current to a load.
- Common in LED drivers, laser diode drivers, and other applications requiring precise current control.
Integrators and Differentiators:
- Used in control systems and signal processing to perform integration or differentiation of signals.
- Useful in feedback loops and control algorithms.

The LF356N's versatility and performance make it a popular choice for a wide range of analog circuits where precision and reliability are essential.

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LF356N Series Monolithic JFET Input Operational Amplifiers

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Alternate Names

LF356N

LF356N has several brands around the world that may have alternate names for LF356N due to regional differences or acquisition. LF356N may also be known as the following names:

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