OP413

OP413 Dual Operational Amplifier Technical Summary

Overview

The OP413 is a high-performance dual operational amplifier designed for precision applications requiring low noise, low drift, and single-supply operation. As part of the OP113 family, it delivers exceptional analog performance in systems utilizing digital calibration, making it ideal for processor-based applications where temperature stability and noise are critical factors. The device operates seamlessly across a wide single-supply voltage range (+4V to +36V) or dual supplies (±2V to ±18V), offering flexibility in diverse circuit configurations.

Key Features

• Single- or Dual-Supply Operation: Supports +4V to +36V single-supply or ±2V to ±18V dual-supply configurations.
• Ultra-Low Noise: 4.7 nV/√Hz noise density at 1 kHz for high-precision signal conditioning.
• Wide Bandwidth: 3.4 MHz gain-bandwidth product enables use in moderate-speed applications.
• Precision Offset Voltage: Typical 100 μV offset minimizes calibration requirements.
• Exceptional Temperature Stability: 0.2 μV/°C drift maintains accuracy across operating temperatures.
• Unity Gain Stable: No external compensation required for stable operation at any gain.
• No Phase Reversal: Maintains signal integrity when inputs exceed common-mode range.

Applications

The OP413's combination of precision and versatility makes it suitable for demanding applications across multiple industries:

• Digital Measurement Systems: High-accuracy digital scales and precision instrumentation.
• Industrial Sensors: Strain gauge amplifiers and bridge transducer conditioning circuits.
• Portable Electronics: Battery-powered medical devices and handheld test equipment.
• Temperature Monitoring: Thermocouple and RTD signal conditioning with low drift.
• Audio Processing: High-fidelity multimedia systems requiring low-noise amplification.
• Automotive Electronics: Sensor interfaces in harsh temperature environments.

Electrical Characteristics

All specifications are typical at +25°C with ±15V supplies unless otherwise noted.

DC Characteristics

• Input Offset Voltage: 100 μV (max 250 μV)
• Input Offset Current: 0.5 nA (max 2 nA)
• Input Bias Current: 10 nA (max 20 nA)
• Common Mode Rejection Ratio: 120 dB (min 100 dB)
• Power Supply Rejection Ratio: 110 dB (min 90 dB)
• Open Loop Gain: 1,000,000 (min 500,000)

AC Characteristics

• Gain Bandwidth Product: 3.4 MHz
• Slew Rate: 2.1 V/μs
• Settling Time (0.1%): 5 μs for 10V step
• Total Harmonic Distortion: 0.0003% at 1 kHz
• Input Voltage Noise: 4.7 nV/√Hz at 1 kHz

Power Characteristics

• Supply Voltage Range: ±2V to ±18V or +4V to +36V
• Quiescent Current: 1.2 mA per amplifier
• Operating Temperature Range: -40°C to +125°C

Package Information

The OP413 is available in multiple industry-standard packages:

8-Lead SOIC (Narrow Body)

• Dimensions: 4.90mm x 3.90mm body
• Lead Pitch: 1.27mm
• Package Code: SO-8
• Thermal Resistance: 160°C/W (Junction-to-Air)

8-Lead PDIP (Plastic Dip)

• Dimensions: 9.81mm x 6.35mm body
• Lead Pitch: 2.54mm
• Package Code: PDIP-8
• Thermal Resistance: 100°C/W (Junction-to-Air)

8-Lead MSOP (Mini Small Outline)

• Dimensions: 3.00mm x 3.00mm body
• Lead Pitch: 0.65mm
• Package Code: MSOP-8
• Thermal Resistance: 200°C/W (Junction-to-Air)

Design Considerations

When implementing the OP413 in precision applications, consider these design guidelines:

• Use low-impedance feedback networks to minimize noise contributions.
• Maintain proper PCB layout practices - keep analog and digital grounds separate.
• For lowest noise operation, bypass power supplies with 0.1μF ceramic capacitors placed close to device pins.
• In high-gain applications, consider the effects of resistor thermal noise on overall system performance.
• For temperature-critical applications, minimize thermal gradients across the package.

Reliability and Qualification

The OP413 family undergoes rigorous quality testing including:

• 100% production testing of key parameters
• Extended temperature cycling (-55°C to +150°C)
• 85/85 temperature/humidity bias testing
• ESD protection to 2000V (Human Body Model)
• Latch-up testing per JEDEC Standard JESD78