LF347N
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Texas Instruments LF347N

Manufacturer No:
LF347N
Manufacturer:
Texas Instruments
Package:
Tube
Description:
IC OPAMP JFET 4 CIRCUIT 14DIP
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Payment:
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Product Introduction

Overview

The LF347N, produced by Texas Instruments, is a high-speed, quad JFET-input operational amplifier. This device is characterized by its low input bias and offset currents, high input impedance, wide gain-bandwidth product, and fast slew rate. The LF347N is designed to operate with low supply current while maintaining high performance, making it suitable for a variety of applications requiring high-speed and low noise operation.

Key Specifications

Parameter Min Typ Max Unit
Supply Voltage ±18 V
Differential Input Voltage ±15 V
Input Offset Voltage 3 10 13 mV
Input Offset Current 50 pA
Input Bias Current 50 pA
Large Signal Voltage Gain 25 100 V/mV
Output Voltage Swing ±12 ±13 V
Common-Mode Rejection Ratio 120 dB
Power Supply Rejection Ratio 120 dB
Input Resistance 10^12 Ω
Supply Current 7.2 mA
Slew Rate 8 13 V/μs
Gain Bandwidth Product 4 MHz
Equivalent Input Noise Voltage 18 nV/√Hz
Equivalent Input Noise Current 0.01 pA/√Hz
Operating Temperature Range 0 70 °C
Storage Temperature Range -65 150 °C

Key Features

  • High Input Impedance: The LF347N features high input impedance due to its JFET inputs, making it suitable for applications requiring minimal input loading.
  • Low Input Bias and Offset Currents: The device has very low input bias and offset currents, typically 50 pA, which is beneficial for high-precision applications.
  • Wide Gain Bandwidth: The LF347N has a gain bandwidth product of 4 MHz, enabling it to handle high-frequency signals effectively.
  • Fast Slew Rate: With a slew rate of 13 V/μs, this operational amplifier can quickly respond to changes in the input signal.
  • Low Supply Current: The device operates with a low supply current of 7.2 mA, making it energy-efficient.
  • High Common-Mode Rejection Ratio (CMRR) and Power Supply Rejection Ratio (PSRR): These ratios are high, typically 120 dB, ensuring good noise rejection and stability.
  • Output Short-Circuit Protection: The output is protected against shorts due to the resistive 200-Ω output impedance.

Applications

  • High-Speed Integrators: The LF347N is suitable for high-speed integrator circuits due to its fast slew rate and wide bandwidth.
  • Digital-to-Analog Converters (DACs): Its high speed and low noise characteristics make it ideal for fast DAC applications.
  • Sample-and-Hold Circuits: The device's fast response and low input bias currents are beneficial for sample-and-hold circuits.
  • Audio and Signal Processing: The LF347N can be used in various audio and signal processing applications requiring high fidelity and low noise.
  • General-Purpose Amplification: It can be used in a wide range of general-purpose amplification tasks where high input impedance and low noise are required.

Q & A

  1. What is the typical slew rate of the LF347N?

    The typical slew rate of the LF347N is 13 V/μs.

  2. What is the gain bandwidth product of the LF347N?

    The gain bandwidth product of the LF347N is 4 MHz.

  3. What are the typical input bias and offset currents of the LF347N?

    The typical input bias and offset currents are 50 pA.

  4. What is the operating temperature range of the LF347N?

    The operating temperature range is from 0°C to 70°C.

  5. What are the common package types for the LF347N?

    The LF347N is available in PDIP-14 and SOIC-14 packages.

  6. What is the typical supply current of the LF347N?

    The typical supply current is 7.2 mA.

  7. Does the LF347N have output short-circuit protection?

    Yes, the output is protected against shorts due to the resistive 200-Ω output impedance.

  8. What are some common applications of the LF347N?

    Common applications include high-speed integrators, digital-to-analog converters, sample-and-hold circuits, and general-purpose amplification.

  9. What is the input resistance of the LF347N?

    The input resistance is typically 10^12 Ω.

  10. What is the equivalent input noise voltage of the LF347N?

    The equivalent input noise voltage is typically 18 nV/√Hz.

Product Attributes

Amplifier Type:J-FET
Number of Circuits:4
Output Type:- 
Slew Rate:13V/µs
Gain Bandwidth Product:4 MHz
-3db Bandwidth:- 
Current - Input Bias:50 pA
Voltage - Input Offset:5 mV
Current - Supply:7.2mA (x4 Channels)
Current - Output / Channel:- 
Voltage - Supply Span (Min):36 V
Voltage - Supply Span (Max):36 V
Operating Temperature:0°C ~ 70°C
Mounting Type:Through Hole
Package / Case:14-DIP (0.300", 7.62mm)
Supplier Device Package:14-PDIP
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Same Series
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Similar Products

Part Number LF347N LF347BN LF347D LF347M
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Product Status Active Active Active Not For New Designs
Amplifier Type J-FET J-FET J-FET J-FET
Number of Circuits 4 4 4 4
Output Type - - - -
Slew Rate 13V/µs 13V/µs 13V/µs 13V/µs
Gain Bandwidth Product 4 MHz 4 MHz 3 MHz 4 MHz
-3db Bandwidth - - - -
Current - Input Bias 50 pA 50 pA 50 pA 50 pA
Voltage - Input Offset 5 mV 3 mV 5 mV 5 mV
Current - Supply 7.2mA (x4 Channels) 7.2mA (x4 Channels) 8mA (x4 Channels) 7.2mA (x4 Channels)
Current - Output / Channel - - 40 mA -
Voltage - Supply Span (Min) 36 V 36 V 7 V 10 V
Voltage - Supply Span (Max) 36 V 36 V 36 V 36 V
Operating Temperature 0°C ~ 70°C 0°C ~ 70°C 0°C ~ 70°C (TA) 0°C ~ 70°C
Mounting Type Through Hole Through Hole Surface Mount Surface Mount
Package / Case 14-DIP (0.300", 7.62mm) 14-DIP (0.300", 7.62mm) 14-SOIC (0.154", 3.90mm Width) 14-SOIC (0.154", 3.90mm Width)
Supplier Device Package 14-PDIP 14-PDIP 14-SOIC 14-SOIC

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