OP200 Precision Dual Operational Amplifier

Overview

The OP200 is a monolithic dual operational amplifier that delivers precision performance comparable to the OP77, while offering significant space and cost savings due to its dual-amplifier design. Designed for high-accuracy applications, the OP200 is available in the industry-standard 8-pin configuration, making it a versatile choice for engineers requiring precision analog signal conditioning.

This component is ideal for applications demanding low noise, high gain, and minimal power consumption. Its on-chip zener-zap trimming ensures exceptionally low input offset voltage, eliminating the need for external offset adjustments. The OP200 is pin-compatible with several industry-standard dual op-amps, allowing for easy upgrades in existing designs.

Features

• Ultra-Low Input Offset Voltage: Less than 75 µV, ensuring high accuracy in precision applications.
• Low Offset Voltage Drift: Below 0.5 µV/°C, guaranteed over the full military temperature range (-55°C to +125°C).
• High Open-Loop Gain: Exceeds 5,000,000 when driving a 10 kΩ load, providing excellent signal integrity.
• Low Input Bias Current: Under 2 nA, minimizing errors in high-impedance circuits.
• Exceptional Common-Mode Rejection (CMR): Over 120 dB, reducing noise and interference in differential signal paths.
• Low Power Supply Rejection Ratio (PSRR): Below 1.8 mV/V, ensuring stable performance despite supply variations.
• Low Power Consumption: Each amplifier draws less than 725 µA, with total current for the dual OP200 being less than half that of a single OP07.
• Low Noise Performance: Voltage noise density of 11 nV/√Hz at 1 kHz, half that of many competing devices.
• Pin Compatibility: Matches the pinout of OP221, LM158, MC1458/1558, and LT1013 for easy replacement.

Applications

The OP200 is designed for precision applications where low noise, high gain, and minimal power consumption are critical. Key application areas include:

• Instrumentation Amplifiers: High CMR and low offset voltage make it ideal for sensitive measurement systems.
• Medical Electronics: Used in ECG amplifiers, blood pressure monitors, and other low-noise biomedical devices.
• Industrial Control Systems: Suitable for process control, strain gauge amplifiers, and temperature sensing circuits.
• Data Acquisition Systems: Ensures accurate signal conditioning in ADCs and DACs.
• Military and Aerospace: Guaranteed performance over the full military temperature range makes it suitable for harsh environments.
• Battery-Powered Devices: Low power consumption extends battery life in portable equipment.

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (±V_S): ±22 V
• Input Voltage Range: ±V_S
• Operating Temperature Range: -55°C to +125°C
• Storage Temperature Range: -65°C to +150°C

Key Performance Specifications (Typical @ 25°C, ±15V Supply)

• Input Offset Voltage (V_OS): 25 µV (max 75 µV)
• Input Offset Voltage Drift: 0.3 µV/°C (max 0.5 µV/°C)
• Input Bias Current (I_B): 1.2 nA (max 2 nA)
• Open-Loop Gain (A_VOL): 5,000,000 (min) into 10 kΩ
• Common-Mode Rejection Ratio (CMRR): 126 dB (min 120 dB)
• Power Supply Rejection Ratio (PSRR): 1.5 mV/V (max 1.8 mV/V)
• Supply Current per Amplifier (I_S): 700 µA (max 725 µA)
• Voltage Noise Density: 11 nV/√Hz @ 1 kHz

Package Information

The OP200 is available in multiple package options to suit different assembly and thermal requirements:

• 8-Pin PDIP (Plastic Dual In-Line Package): Industry-standard through-hole mounting.
• 8-Pin SOIC (Small Outline Integrated Circuit): Surface-mount package for space-constrained designs.
• 8-Pin CERDIP (Ceramic Dual In-Line Package): Hermetically sealed for high-reliability applications.

Pin Configuration (8-Pin Package)

• Pin 1: Output A
• Pin 2: Inverting Input A
• Pin 3: Non-Inverting Input A
• Pin 4: V_EE (Negative Supply)
• Pin 5: Non-Inverting Input B
• Pin 6: Inverting Input B
• Pin 7: Output B
• Pin 8: V_CC (Positive Supply)

Conclusion

The OP200 represents a significant advancement in dual operational amplifier technology, combining the precision of the OP77 with the efficiency of a dual-amplifier design. Its ultra-low offset voltage, high gain, and minimal power consumption make it an excellent choice for precision analog applications across industries. Whether used in medical devices, industrial controls, or military systems, the OP200 delivers reliable, high-performance operation in a compact and cost-effective package.