OP297GSZ Device Information

Overview

The OP297GSZ is a dual low bias current precision operational amplifier designed for high-precision applications. It combines low input bias current, low offset voltage, and high common-mode rejection ratio (CMRR) in a compact 8-lead SOIC package. The device is optimized for low power consumption and operates from ±2 V to ±20 V supply voltages, making it suitable for a wide range of applications, including battery-powered systems and high-precision instrumentation.

Key Features

• Low Offset Voltage: Maximum 50 μV (OP297E) to 400 μV (OP297G)
• Low Offset Voltage Drift: Maximum 0.6 μV/°C (OP297E) to 2.0 μV/°C (OP297G)
• Very Low Bias Current: Maximum 100 pA at 25°C, 450 pA over the military temperature range
• High Open-Loop Gain: Minimum 2000 V/mV
• High Common-Mode Rejection: Minimum 120 dB
• Low Supply Current: Maximum 625 μA per amplifier
• Wide Supply Voltage Range: Operates from ±2 V to ±20 V
• Rail-to-Rail Output: Suitable for interfacing with CMOS/TTL logic

Applications

• Strain Gage and Bridge Amplifiers
• High Stability Thermocouple Amplifiers
• Instrumentation Amplifiers
• Photocurrent Monitors
• High Gain Linearity Amplifiers
• Long-Term Integrators/Filters
• Sample-and-Hold Amplifiers
• Peak Detectors
• Logarithmic Amplifiers
• Battery-Powered Systems

Pin Configuration

Ordering Information

• Part Number: OP297GSZ
• Package Type: 8-Lead SOIC (R-8)
• Temperature Range: -40°C to +85°C
• RoHS Compliance: Yes (indicated by "Z" suffix)

Electrical Characteristics (Typical @ VS = ±15 V, TA = 25°C)

• Input Offset Voltage (VOS): 50 μV (max)
• Input Offset Current (IOS): ±100 pA (max)
• Input Bias Current (IB): ±100 pA (max)
• Large Signal Voltage Gain (AVO): 2000 V/mV (min)
• Common-Mode Rejection (CMRR): 120 dB (min)
• Power Supply Rejection (PSRR): 120 dB (min)
• Output Voltage Swing (VOUT): ±13 V (min) into 10 kΩ load
• Supply Current per Amplifier (ISY): 625 μA (max)

Absolute Maximum Ratings

• Supply Voltage: ±20 V
• Input Voltage: ±20 V
• Differential Input Voltage: 40 V
• Output Short-Circuit Duration: Indefinite
• Storage Temperature Range: -65°C to +150°C
• Lead Temperature (Soldering, 60 sec): 300°C

Thermal Resistance (θJA)

• 8-Lead SOIC (S-Suffix): 150 °C/W

Notes

• The OP297GSZ is designed for high-precision applications and requires careful PCB layout to minimize leakage currents and maintain high input impedance.
• The device is protected against large differential voltages at the input pins, and common-mode voltages can vary over the full supply range.
• For optimal performance, use guard rings around the input pins to minimize leakage currents, especially in high-impedance applications.