The OP07C is a landmark precision operational amplifier known for its ultra-low offset voltage and high stability over time and temperature. Built using a bipolar process, it eliminates the need for external components for offset nulling and frequency compensation in most applications. It is the industry-standard choice for low-level signal conditioning and precision instrumentation where accuracy is the top priority.

Specifications

• Supply Voltage: ± 3V to ± 18V (Dual rail)
• Ultra-Low Input Offset Voltage: 60uV (Typical) / 150uV (Max)
• Low Offset Voltage Drift: 1.3uV / °C (Max)
• High Open-Loop Gain: 400V / mV (Typical)
• Wide Input Voltage Range: ± 14V (Typical)
• Low Input Bias Current: 1.8nA (Typical)
• Package: SOIC-8 (Surface Mount)

Features

• Exceptional Stability: Designed to maintain precision over long periods, making it ideal for equipment that cannot be recalibrated frequently.
• Low Noise: Features low-frequency noise (0.1Hz to 10Hz) of only 0.6uV peak-to-peak, which is vital for high-resolution measurement.
• Internal Frequency Compensation: Simplifies design by remaining stable at unity gain without external capacitors.
• High Common-Mode Rejection (CMRR): Boasts a CMRR of 110dB, allowing it to accurately extract small signals from noisy environments or large common-mode voltages.
• Precision without Trimming: While it includes pins for external offset nulling (if absolutely necessary), the factory laser-trimming usually makes external adjustments redundant.

Common Applications

• Precision Instrumentation: Ideal for multimeters, weigh scales, and laboratory grade measurement tools.
• Thermocouple Amplifiers: Amplifying the millivolt-level signals from temperature sensors with high accuracy.
• Strain Gauge Bridges: Used in load cells for industrial weighing systems.
• Low-Frequency Active Filters: Creating filters where the DC precision of the signal must be preserved.
• Voltage Reference Buffers: Providing a stable, high-impedance buffer for precision voltage references.

Usage Tips

• Power Supplies: Unlike modern CMOS op-amps, the OP07 is designed for dual-rail operation. If using a single supply, ensure your input signal is biased correctly within the common-mode range.
• Low Speed: The OP07 is a "precision" amp, not a "high-speed" amp. With a slew rate of roughly 0.3V / us, it is best suited for DC and low-frequency signals.
• Thermal Gradients: To maintain the ultra-low offset voltage, keep the IC away from high-heat components on your PCB. Large temperature shifts across the board can induce small thermocouple effects in the traces.
• Decoupling: Standard practice applies; place 0.1uF ceramic capacitors near the V+ and V– pins to ensure the highest possible precision.

Datasheet