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TL084CN

Quad JFET-input op-amp, 3MHz GBW, 13V/us slew rate, 4.5-40V supply, 14-PDIP

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Manufacturer Part：

TL084CN

Package：

14-PDIP

Brand：
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Description

Product Overview

The TL084CN from Texas Instruments is a quad JFET-input operational amplifier in a 14-pin PDIP package. It features high slew rate of 13V/us, low input bias current, and wide supply voltage range of 4.5V to 40V. The CN suffix indicates commercial temperature range (0 to 70 C).

Key Specifications

Channels 4 (Quad)
Supply Voltage Range 4.5V to 40V (+/-2.25V to +/-20V)
Gain-Bandwidth Product 3MHz
Slew Rate 13V/us
Input Offset Voltage 3mV (typ), 15mV (max)
Input Bias Current 30pA (typ)
CMRR 86dB (typ)
Package 14-PDIP
Operating Temperature 0 to +70 C

Features

  • JFET-input stage for low input bias current
  • High slew rate: 13V/us
  • Low total harmonic distortion: 0.003% (typ)
  • Output short-circuit protection
  • Wide common-mode and differential voltage ranges
  • Internal frequency compensation
  • Pin-compatible with LM324 (with FET input)

Applications

  • Audio preamplifiers and mixers
  • Active filters and integrators
  • Instrumentation amplifiers
  • Sensor signal conditioning
  • Oscillator circuits

The TL084CN is a quad JFET-input operational amplifier from Texas Instruments, offering four independent high-performance op-amps in a single 14-pin PDIP package. The JFET-input stage provides extremely low input bias current (typically 30pA) and high input impedance, making it ideal for applications requiring minimal loading of signal sources. With a gain-bandwidth product of 3MHz and a slew rate of 13V/us, the TL084CN is suitable for a wide range of audio and general-purpose signal processing applications. The wide supply voltage range of 4.5V to 40V allows flexible design configurations.

The TL084CN uses JFET-input differential pairs at the input stage, providing high input impedance and low bias current. Each of the four op-amp channels consists of a differential input stage with JFETs, followed by a gain stage and a class AB output stage with short-circuit protection. Internal frequency compensation ensures stability without external capacitors. The JFET input structure allows the common-mode input voltage to include the positive supply rail, extending the usable input range. The device operates in voltage feedback mode with a typical gain-bandwidth product of 3MHz.

Pin Name Function
1 1OUT Channel 1 output
2 1IN- Channel 1 inverting input
3 1IN+ Channel 1 non-inverting input
4 VCC+ Positive supply voltage
5 2IN+ Channel 2 non-inverting input
6 2IN- Channel 2 inverting input
7 2OUT Channel 2 output
8 3OUT Channel 3 output
9 3IN- Channel 3 inverting input
10 3IN+ Channel 3 non-inverting input
11 VCC- Negative supply voltage
12 4IN+ Channel 4 non-inverting input
13 4IN- Channel 4 inverting input
14 4OUT Channel 4 output
  • Multi-channel audio preamplifiers with low-noise JFET input stage
  • Active filter designs requiring four independent op-amps in one package
  • High-impedance sensor interfaces where low bias current is critical
  • Industrial signal conditioning with wide supply voltage flexibility
Model Manufacturer Key Difference
TL084ACN TI Lower offset voltage, tighter specs
TL084IN TI Industrial temperature range (-40 to 85 C)
LM324N TI Bipolar input, lower cost, higher bias current
OPA4134 TI Higher performance, FET-input audio op-amp
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