TL061IP - Low-Power JFET-Input Operational Amplifier

Overview

The TL061IP is a member of the TL06x series of JFET-input operational amplifiers (op-amps) designed by Texas Instruments. This series is optimized for low-power consumption while maintaining high input impedance and low noise characteristics. The TL061IP is a single-channel op-amp, making it suitable for applications where power efficiency and precision are critical. Its JFET input stage provides high input impedance, which is ideal for interfacing with high-impedance sensors and signal sources.

The device operates over a wide supply voltage range and is characterized by low input bias and offset currents. It is well-suited for battery-powered applications, portable instrumentation, and other scenarios where minimizing power consumption is essential.

Features

• Low Power Consumption: Typically draws only 200 µA of supply current, making it ideal for battery-operated devices.
• High Input Impedance: JFET input stage provides input impedance in the order of 10¹² Ω, minimizing loading effects on signal sources.
• Wide Supply Voltage Range: Operates from ±5V to ±15V split supplies or a single supply from 10V to 30V.
• Low Input Bias Current: Typically 30 pA, reducing errors in high-impedance circuits.
• Low Noise: Input noise voltage of 18 nV/√Hz at 1 kHz ensures clean signal amplification.
• High Slew Rate: 3.5 V/µs enables reasonable performance in dynamic signal applications.
• Stable Operation: Internally compensated for unity-gain stability.
• Extended Temperature Range: Operates over -40°C to +105°C, suitable for industrial environments.

Applications

The TL061IP is versatile and finds use in a variety of analog signal processing applications, including:

• Sensor Signal Conditioning: Amplification of signals from high-impedance sensors such as piezoelectric, photodiode, and pH sensors.
• Active Filters: Used in low-power active filter designs, including low-pass, high-pass, and band-pass configurations.
• Portable and Battery-Powered Devices: Ideal for medical devices, handheld meters, and remote monitoring systems due to its low power consumption.
• Audio Preamplifiers: Suitable for high-impedance microphone and instrument preamps where low noise is critical.
• Integrators and Differentiators: Used in analog computing circuits due to its high input impedance and low bias current.
• Voltage Followers: Provides buffering in high-impedance circuits without significant signal degradation.

Electrical Characteristics

The following table summarizes key electrical specifications for the TL061IP under typical operating conditions (V_CC = ±15V, T_A = 25°C unless otherwise noted):

• Supply Voltage Range: ±5V to ±15V (dual supply), 10V to 30V (single supply)
• Input Offset Voltage: 3 mV (max)
• Input Bias Current: 30 pA (typ)
• Input Offset Current: 5 pA (typ)
• Common-Mode Rejection Ratio (CMRR): 80 dB (typ)
• Supply Current (per amplifier): 200 µA (typ)
• Large-Signal Voltage Gain: 50 V/mV (typ) at R_L = 10 kΩ
• Slew Rate: 3.5 V/µs (typ)
• Gain Bandwidth Product: 1 MHz (typ)
• Output Voltage Swing: ±12 V (min) at R_L = 10 kΩ

Package Information

The TL061IP is available in an 8-pin PDIP (Plastic Dual In-Line Package), which is a through-hole mounting option suitable for prototyping and general-purpose use. Key package details include:

• Package Type: PDIP-8
• Dimensions: 9.81 mm x 6.35 mm (body size)
• Pin Pitch: 2.54 mm (standard DIP spacing)
• Operating Temperature Range: -40°C to +105°C
• Moisture Sensitivity Level (MSL): MSL 1 (unlimited floor life at ≤30°C/85% RH)

Pin Configuration

The pinout for the TL061IP in the PDIP-8 package is as follows:

• Pin 1: Offset Null (optional for precision applications)
• Pin 2: Inverting Input (-IN)
• Pin 3: Non-Inverting Input (+IN)
• Pin 4: V_EE (Negative Supply Voltage)
• Pin 5: Offset Null (optional for precision applications)
• Pin 6: Output (OUT)
• Pin 7: V_CC (Positive Supply Voltage)
• Pin 8: NC (No Connection)

Conclusion

The TL061IP is a highly efficient, low-power operational amplifier with JFET inputs, making it an excellent choice for applications requiring high input impedance and minimal power consumption. Its robust electrical characteristics, including low noise and stable operation, ensure reliable performance in a wide range of analog circuits. The PDIP-8 package offers ease of use for prototyping and through-hole PCB designs, while its extended temperature range makes it suitable for industrial applications.