company blog about ADI Original OP297GSZ Low Bias Current Precision, Dual Channel Operational Amplifier

ADI Original OP297GSZ Low Bias Current Precision, Dual Channel Operational Amplifier

Shenzhen Mingjiada Electronics Co., Ltd. — Long-term supplier of ADI (OP297GSZ) dual-channel operational amplifiers. Below are the product details for the OP297GSZ:

OP297GSZ — Basic Information:
Model: OP297GSZ
Package: SOIC-8
Type: Operational Amplifier
Product Description: OP297GSZ — Low-bias-current, precision (dual-channel) operational amplifier.

OP297GSZ Specifications:
Number of Circuits: 2
Slew Rate: 0.15 V/µs
Gain-Bandwidth Product: 500 kHz
Current - Input Bias: 50 pA
Voltage - Input Offset: 80 µV
Current - Supply: 525 µA (x2 channels)
Voltage - Span (Minimum): 4 V
Voltage - Span (Maximum): 40 V
Operating Temperature: -40°C to 85°C
Mounting Type: Surface Mount
Package/Case: 8-SOIC (0.154", 3.90mm wide)
Supplier Device Package: 8-SOIC

OP297GSZ is a dual-channel operational amplifier integrating precision performance into a space-saving, industry-standard 8-pin SO package. It combines precision characteristics with low power consumption and ultra-low input bias current, making it suitable for a wide range of applications.

OP297GSZ's precision characteristics include extremely low offset voltage (below 50 µV) and low drift (less than 0.6 µV/°C). An open-loop gain exceeding 2000 V/mV ensures high linearity in any application.

OP297GSZ delivers a common-mode rejection ratio exceeding 120 dB, thereby eliminating errors caused by common-mode signals. Its power supply rejection ratio exceeds 120 dB, minimising offset voltage variations in battery-powered systems. Furthermore, each amplifier draws less than 625 µA of supply current and operates on voltages as low as ±2 V.

Employing a super-beta input stage with bias current cancellation, the OP297GSZ maintains picoampere-level bias current across all temperatures. This contrasts with FET-input operational amplifiers. FET input operational amplifiers exhibit picoampere-level bias currents at 25°C, but this current doubles for every 10°C increase in temperature; exceeding 85°C results in microampere-level bias currents.

The OP297GSZ maintains an input bias current below 100 pA at 25°C and remains within 450 pA across the entire military temperature range.

OP297GSZ Product Features:
Low offset voltage: 50 µV (maximum)
Low offset voltage drift: 0.6 µV/°C (maximum)
Extremely low bias current: 100 pA (maximum)
Extremely high open-loop gain: 2000 V/mV (minimum)
Low supply current: (per amplifier)
625 µA (maximum)
Supply voltage: ±2 V to ±20 V
High common-mode rejection: 120 dB (minimum)

OP297GSZ 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

The OP297GSZ is a dual-channel operational amplifier integrating high precision, low power consumption, and low input bias current. Its low offset, low drift, high gain, and ability to maintain ultra-low input bias current across a wide temperature range make it ideal for precision analogue circuits demanding high signal integrity.

【Mingjiada Electronics】Offers immediate availability of ADI's OP297GSZ low-bias-current, precision dual-channel operational amplifier. For further product information or pricing enquiries regarding the OP297GSZ amplifier, please visit Mingjiada Electronics' official website (https://www.integrated-ic.com/) to view supply details.