ISL28158FBZ

Instrumentation, Op Amps, Buffer Amps Overview

The ISL28158FBZ is a single-channel, micro-power precision operational amplifier manufactured by Intersil. It features rail-to-rail input and output capabilities with an ultra-low input bias current of 1 pA, making it suitable for high-impedance sensor applications. Key electrical specifications include a gain-bandwidth product of 0.2 MHz, a slew rate of 0.3 V/µs, and an input offset voltage of 40 µV. The device operates on a supply voltage range of 2.4 V to 5.5 V or ±1.2 V to ±2.75 V, consuming only 34 µA per channel. It offers a common-mode rejection ratio of 98 dB and is housed in an SOIC-8 package.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Ultra-low input bias current of 1 pA for high-impedance sensing
• Rail-to-rail input and output operation
• Micro-power consumption at 34 µA per channel
• Precision performance with low input offset voltage

Instrumentation, Op Amps, Buffer Amps Applications

• Photodiode amplification circuits
• pH probe signal conditioning
• High-impedance sensor interfaces
• Battery-powered instrumentation systems

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the manufacturer source carefully as Intersil was acquired by Renesas Electronics. Confirm that the component matches the original Intersil specifications rather than a generic equivalent. Check for RoHS compliance status and ensure the package type corresponds to the required PCB footprint. Validate the date code against any potential obsolescence notices from the manufacturer.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when ultra-low bias current is critical for maintaining accuracy in high-impedance circuits. It is appropriate for battery-operated devices due to its micro-power profile. Ensure the application does not require high-speed signal processing, as the bandwidth is limited to 0.2 MHz. Verify that the supply voltage range aligns with the system's power constraints.

Instrumentation, Op Amps, Buffer Amps Part Context

The ISL28158FBZ belongs to the ISL28x58 family of precision amplifiers from Intersil, now part of Renesas Electronics. This series is designed for applications requiring high precision and low power consumption. The single-channel configuration distinguishes it from dual-channel variants like the ISL28258. It serves as a specialized solution for analog front-end stages in sensitive measurement equipment.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Check for direct pin-compatible replacements within the Renesas portfolio if availability is an issue. Consider the ISL28158FBZ-T7 for tape-and-reel packaging requirements. Evaluate other ultra-low bias op-amps if specific performance parameters differ significantly from the original design intent.

Instrumentation, Op Amps, Buffer Amps FAQ

What is the typical input bias current for the ISL28158FBZ?

The typical input bias current is 1 pA, which is exceptionally low for a general-purpose precision amplifier.

Does the ISL28158FBZ support rail-to-rail operation?

Yes, the ISL28158FBZ features both rail-to-rail input and rail-to-rail output capabilities.

What is the maximum supply voltage for this device?

The maximum supply voltage is 5.5 V for single-supply operation or ±2.75 V for dual-supply operation.