FHP3131IL6X

Instrumentation, Op Amps, Buffer Amps Overview

The FHP3131IL6X is a high-performance voltage-feedback operational amplifier manufactured by onsemi, originally developed by Fairchild Semiconductor. It operates within a supply voltage range of 2.5V to 12V and consumes only 0.4mA of quiescent current. The device provides a unity-gain bandwidth of 70MHz and a slew rate of 50V/μs at +5V. It features rail-to-rail output capability and an input common-mode voltage range that extends below the negative rail. A dedicated disable pin allows for power-down operation with current consumption dropping below 30μA. The component is housed in a MicroPak-6 package and supports an operating temperature range from -40°C to +85°C.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Rail-to-rail output performance with input common-mode voltage extending below the negative supply rail
• Low power consumption of 0.4mA with a dedicated disable function reducing current draw below 30μA
• High-speed signal processing capabilities including 70MHz bandwidth and 50V/μs slew rate
• Compact MicroPak-6 surface-mount packaging designed for space-constrained applications

Instrumentation, Op Amps, Buffer Amps Applications

• Portable and battery-powered electronic devices
• Analog-to-digital converter (A/D) buffer circuits
• Active filter implementations
• Video driver stages and coaxial cable drivers
• Portable test instruments

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific IL6X suffix to confirm the MicroPak-6 package variant rather than the standard SOT23-6 configuration. Ensure compatibility with the -40°C to +85°C industrial temperature range requirements. Confirm that the disabling logic aligns with system control signals, as the pin must be pulled low to enter the low-power state. Validate layout guidelines regarding supply bypassing and ground plane removal near pins to maintain high-frequency stability.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when designing systems requiring high bandwidth and fast transient response under strict power constraints. The rail-to-rail characteristics make it suitable for single-supply operations where maximizing dynamic range is critical. Consider the MicroPak-6 package for applications demanding minimal board area. Evaluate the disable feature if system-level power management requires active shutdown states without removing main power rails.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the FHP3131 series of high-speed amplifiers. The IL6X designation specifically identifies the MicroPak-6 package option, distinct from the IS6X SOT23-6 variant. Originally produced by Fairchild Semiconductor, the product line was integrated into onsemi's portfolio following corporate acquisition. The device utilizes a complementary bipolar fabrication process optimized for low noise and high speed.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

FHP3131IS6X: Identical electrical specifications and functionality; differs only in the SOT23-6 package form factor compared to the MicroPak-6.

Instrumentation, Op Amps, Buffer Amps FAQ

How does the disable pin affect the amplifier's output state?

Pulling the disable pin low places the output in a high-impedance state while reducing the supply current to below 30μA. Leaving the pin floating or pulling it high enables normal operation.

What is the input common-mode voltage range relative to the supply rails?

The input common-mode voltage range extends below the negative supply rail, allowing for signals slightly lower than the negative terminal depending on the specific supply configuration.

Is the FHP3131 capable of driving capacitive loads directly?

Directly driving large capacitive loads may cause instability. The datasheet recommends adding a small series resistance at the output to improve stability and settling performance when driving capacitive loads.