TL082CN

TL082CN - High Speed JFET Input Dual Operational Amplifier

Overview

The TL082CN is a high-speed JFET-input dual operational amplifier that combines low power consumption with wide bandwidth and high slew rate. Part of the TL08x series, this component is designed for applications requiring high input impedance, low noise, and fast signal processing. The TL082CN features internal frequency compensation, latch-up-free operation, and protection against output short circuits.

This operational amplifier is particularly suitable for applications where multiple amplifiers are needed in a single package, as it contains two independent op-amps with matched specifications. The JFET input stage provides very high input impedance and low input bias currents, making it ideal for interfacing with high-impedance sources.

Key Features

• High input impedance JFET input stage (10¹²Ω typical)
• Low input bias current: 30 pA typical
• Wide common-mode and differential voltage ranges
• Low noise: 18 nV/√Hz typical at 1 kHz
• High slew rate: 13 V/μs typical
• Wide gain bandwidth: 3 MHz typical
• Low power consumption: 1.4 mA per amplifier typical
• Output short-circuit protection
• Latch-up free operation
• Internal frequency compensation
• Wide supply voltage range: ±5V to ±15V

Applications

The TL082CN is versatile and finds use in numerous analog circuit applications including:

• High-impedance sensor amplifiers
• Active filters
• Sample-and-hold circuits
• Logarithmic amplifiers
• Analog-to-digital converters
• Signal conditioning circuits
• Audio preamplifiers
• Medical instrumentation
• Test and measurement equipment
• Industrial control systems

Electrical Characteristics

All specifications are given for ±15V supply voltage at 25°C unless otherwise noted.

Input Characteristics

• Input Offset Voltage: 3 mV (max), 1 mV (typical)
• Input Bias Current: 30 pA (typical), 200 pA (max)
• Input Offset Current: 5 pA (typical), 100 pA (max)
• Input Resistance: 10¹²Ω (typical)
• Input Capacitance: 4 pF (typical)
• Common Mode Rejection Ratio: 80 dB (typical)

Output Characteristics

• Output Voltage Swing: ±12V (min) with 10kΩ load
• Output Current: 10 mA (typical)
• Short Circuit Current: 60 mA (typical)

Dynamic Characteristics

• Slew Rate: 13 V/μs (typical)
• Gain Bandwidth Product: 3 MHz (typical)
• Settling Time (0.1%): 1 μs (typical)

Power Supply Characteristics

• Supply Voltage Range: ±5V to ±18V
• Supply Current (per amplifier): 1.4 mA (typical), 2.8 mA (max)
• Power Supply Rejection Ratio: 100 dB (typical)

Package Information

The TL082CN is available in an 8-pin PDIP (Plastic Dual In-line Package) with the following dimensions:

• Package Type: PDIP-8
• Length: 9.81 mm (max)
• Width: 6.35 mm (max)
• Height: 3.3 mm (max)
• Lead Pitch: 2.54 mm
• Operating Temperature Range: 0°C to 70°C
• Storage Temperature Range: -65°C to 150°C

Pin Configuration

The TL082CN pinout is as follows:

• Pin 1: Output A
• Pin 2: Inverting Input A
• Pin 3: Non-inverting Input A
• Pin 4: V- (Negative Power Supply)
• Pin 5: Non-inverting Input B
• Pin 6: Inverting Input B
• Pin 7: Output B
• Pin 8: V+ (Positive Power Supply)

Design Considerations

When designing with the TL082CN, consider the following:

• For optimal performance, use low-impedance power supply bypassing (0.1 μF ceramic capacitor close to the IC)
• The JFET input stage is sensitive to electrostatic discharge - proper ESD precautions should be taken during handling
• For applications requiring precision DC performance, consider adding offset nulling circuitry
• When driving capacitive loads, add a small series resistor (100-470Ω) at the output to prevent oscillation
• The device is not recommended for new designs requiring operation below 0°C

Reliability and Quality

The TL082CN is manufactured using a high-reliability silicon-gate process and undergoes rigorous quality testing. Typical reliability characteristics include:

• ESD Protection: 1000V (Human Body Model)
• Mean Time Between Failures (MTBF): >1 million hours at 25°C
• Moisture Sensitivity Level (MSL): MSL 1 (Unlimited floor life at <30°C/85% RH)

Alternative Parts

For different requirements, consider these alternatives:

• TL072: Lower noise version
• TL084: Quad version in 14-pin package
• LF412: Precision JFET-input op-amp with lower offset voltage
• OPA2134: High-performance audio op-amp with improved specifications