TLE2071 JFET-Input Operational Amplifier

Overview

The TLE2071 is part of the TLE207x series of high-performance JFET-input operational amplifiers from Texas Instruments. Designed to significantly outperform the legacy TL07x and TL08x BiFET operational amplifiers, the TLE2071 offers enhanced bandwidth, slew rate, and noise performance. Built using Texas Instruments' Excalibur process, this amplifier is ideal for applications requiring precision, low noise, and high input impedance.

The TLE2071 is pin-compatible with lower-performance BiFET operational amplifiers, making it an easy drop-in replacement for upgrading existing designs. Its JFET-input architecture provides inherently high input impedance, making it suitable for interfacing with high-impedance sensors and low-level AC signals.

Features

• High Bandwidth: More than double the bandwidth of TL07x/TL08x families.
• Improved Slew Rate: Triple the slew rate of legacy BiFET amplifiers.
• Low Noise: Typical noise floor of 11.6 nV/√Hz, with a maximum ensured noise of 17 nV/√Hz.
• Wide Supply Voltage Range: Operates with supply rails up to ±19 V, increasing dynamic signal range.
• Precision Offset Voltage: On-chip zener trimming ensures low offset voltage for DC-coupled applications.
• High Input Impedance: JFET-input architecture provides superior input impedance compared to bipolar or CMOS amplifiers.
• Pin-Compatible: Direct replacement for TL07x/TL08x amplifiers.

Applications

The TLE2071 is designed for high-performance applications where noise, bandwidth, and input impedance are critical. Key application areas include:

• Sensor Interfaces: High input impedance makes it ideal for interfacing with piezoelectric, capacitive, and other high-impedance sensors.
• Audio Equipment: Low noise and high slew rate ensure high-fidelity signal processing in preamplifiers and mixers.
• Medical Instrumentation: Precision and low noise are critical for ECG amplifiers, ultrasound systems, and other medical devices.
• Test and Measurement: Suitable for high-accuracy signal conditioning in oscilloscopes, data acquisition systems, and spectrum analyzers.
• Active Filters: High bandwidth and slew rate enable efficient implementation of active filter designs.

Electrical Characteristics

The following table summarizes the key electrical specifications of the TLE2071 under typical operating conditions (V_CC = ±15 V, T_A = 25°C unless otherwise noted).

DC Characteristics

• Input Offset Voltage: 0.5 mV (typical), 1.5 mV (maximum)
• Input Bias Current: 30 pA (typical), 200 pA (maximum)
• Input Offset Current: 5 pA (typical), 50 pA (maximum)
• Common-Mode Rejection Ratio (CMRR): 100 dB (typical)
• Supply Voltage Rejection Ratio (PSRR): 100 dB (typical)

AC Characteristics

• Gain Bandwidth Product (GBW): 10 MHz (typical)
• Slew Rate: 20 V/µs (typical)
• Input Voltage Noise: 11.6 nV/√Hz (typical at 1 kHz)
• Total Harmonic Distortion (THD): 0.0005% (typical at 1 kHz)

Power Supply Characteristics

• Supply Voltage Range: ±4.5 V to ±19 V
• Quiescent Current: 2.5 mA (typical per amplifier)
• Operating Temperature Range: -40°C to +125°C

Package Information

The TLE2071 is available in multiple package options to suit various design requirements. Below are the available packages and their key dimensions.

Standard Package Options

• PDIP (8-pin): Plastic Dual In-Line Package, 9.81 mm x 6.35 mm body size.
• SOIC (8-pin): Small Outline Integrated Circuit, 4.90 mm x 3.91 mm body size.
• TO-99 (8-pin): Metal Can Package, 9.08 mm diameter.

Thermal and Mechanical Specifications

• Junction-to-Ambient Thermal Resistance (θ_JA): 160°C/W (PDIP), 150°C/W (SOIC), 100°C/W (TO-99).
• Maximum Junction Temperature (T_J): 150°C.
• Lead-Free and RoHS Compliant: All packages meet environmental standards.

Conclusion

The TLE2071 JFET-input operational amplifier represents a significant advancement in BiFET amplifier technology, offering superior bandwidth, slew rate, and noise performance compared to legacy devices. Its precision offset voltage trimming, wide supply range, and high input impedance make it an excellent choice for demanding applications in audio, medical, and instrumentation fields. With its pin-compatible design, the TLE2071 provides an easy upgrade path for existing systems requiring higher performance.