TL072CD

Manufacturer TEXAS INSTRUMENTS
Part Number TL072CD
Supply voltage -0.3 ~ 36V
Operating virtual junction temperature 150°C

TL07xx Low-Noise JFET-Input Operational Amplifiers

Features

  • Low Power Consumption
  • Wide Common-Mode and Differential Voltage Ranges
  • Low Input Bias and Offset Currents
  • Output Short-Circuit Protection
  • Low Total Harmonic Distortion: 0.003% (Typical)
  • Low Noise Vn = 18 nV/√Hz (Typical) at f = 1 kHz
  • High-Input Impedance: JFET Input Stage
  • Internal Frequency Compensation
  • Latch-Up-Free Operation
  • High Slew Rate: 13 V/μs (Typical)
  • Common-Mode Input Voltage Range Includes VCC+

Applications

  • Motor Integrated Systems: UPS
  • Drives and Control Solutions: AC Inverter and VF Drives
  • Renewables: Solar Inverters
  • Pro Audio Mixers
  • DLP Front Projection System
  • Oscilloscopes

Description

The TL07xx JFET-input operational amplifiers incorporate well-matched, high-voltage JFET and bipolar transistors in a monolithic integrated circuit. The devices feature high slew rates, low-input bias and offset currents, and low offset-voltage temperature coefficient. The low harmonic distortion and low noise make the TL07x series ideally suited for high-fidelity and audio pre-amplifier applications. The TL071 device has offset pins to support external input offset correction.

Detailed Description

Overview

The JFET-input operational amplifiers in the TL07xx series are similar to the TL08x series, with low input bias and offset currents, and a fast slew rate. The low harmonic distortion and low noise make the TL07xx series ideally suited for high-fidelity and audio preamplifier applications. Each amplifier features JFET inputs (for high input impedance) coupled with bipolar output stages integrated on a single monolithic chip.

The C-suffix devices are characterized for operation from 0°C to 70°C. The I-suffix devices are characterized for operation from −40°C to +85°C. The M-suffix devices are characterized for operation over the full military temperature range of −55°C to +125°C.

Total Harmonic Distortion

Harmonic distortions to an audio signal are created by electronic components in a circuit. Total harmonic distortion (THD) is a measure of harmonic distortions accumulated by a signal in an audio system. These devices have a very low THD of 0.003% meaning that the TL07x device adds little harmonic distortion when used in audio signal applications.

Slew Rate

The slew rate is the rate at which an operational amplifier can change the output when there is a change on the input. These devices have a 13-V/μs slew rate.

Device Functional Modes

These devices are powered on when the supply is connected. These devices can be operated as a single-supply operational amplifier or dual-supply amplifier depending on the application.

Application Information

A typical application for an operational amplifier is an inverting amplifier. This amplifier takes a positive voltage on the input, and makes the voltage a negative voltage. In the same manner, the amplifier makes negative voltages positive.

Design Requirements

The supply voltage must be selected so the supply voltage is larger than the input voltage range and output range. For instance, this application scales a signal of ±0.5 V to ±1.8 V. Setting the supply at ±12 V is sufficient to accommodate this application.

  • VCC must be within valid range per Recommended Operating Conditions. This example uses a value of 12 V for VCC.
  • Input voltage must be within the recommended common-mode range, as shown in Recommended Operating Conditions. The valid common-mode range is 4 V to 12 V ( VCC– + 4 V to VCC+.
  • Output is limited by output range, which is typically 1.5 V to 10.5 V, or VCC– + 1.5 V to VCC+ – 1.5 V.

Detailed Design Procedure

  • Avoid input voltage values below 1 V to prevent phase reversal where output goes high.
  • Avoid input values below 4 V to prevent degraded VIO that results in an apparent gain greater than 1. This may cause instability in some second-order filter designs.

Layout Guidelines

For best operational performance of the device, use good PCB layout practices, including:

  • Noise can propagate into analog circuitry through the power pins of the circuit as a whole, as well as the operational amplifier. Bypass capacitors are used to reduce the coupled noise by providing low impedance power sources local to the analog circuitry.
    • – Connect low-ESR, 0.1-μF ceramic bypass capacitors between each supply pin and ground, placed as close to the device as possible. A single bypass capacitor from V+ to ground is applicable for singlesupply applications.
  • Separate grounding for analog and digital portions of circuitry is one of the simplest and most-effective methods of noise suppression. One or more layers on multilayer PCBs are usually devoted to ground planes. A ground plane helps distribute heat and reduces EMI noise pickup. Take care to physically separate digital and analog grounds, paying attention to the flow of the ground current. For more detailed information

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