HFA1113IB

Instrumentation, Op Amps, Buffer Amps Overview

The HFA1113IB is a high-speed buffer amplifier manufactured by Renesas Electronics Corporation in an 8-lead SOIC package. It features user-programmable closed-loop gains of +1, -1, or +2 without external resistors and includes programmable output voltage limiting via VH and VL pins. The device operates on dual supplies ranging from ±4.5V to ±5.5V with a typical supply current of 21mA. Key electrical specifications include an 850MHz bandwidth at AV=+1, a slew rate of 2400V/µs, and a sub-nanosecond overdrive recovery time.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• User-programmable output voltage limiting allows setting maximum positive and negative output levels to protect downstream stages.
• Sub-nanosecond overdrive recovery time enables rapid return to linear operation following overload conditions.
• Standard operational amplifier pinout compatibility facilitates upgrades while decreasing component count.

Instrumentation, Op Amps, Buffer Amps Applications

• RF/IF Processors
• Driving Flash A/D Converters
• High-Speed Communications
• Video Switching and Routing

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific ordering suffix (IB vs IBZ) to confirm lead-free compliance status. Confirm that the intended application does not require new designs, as this part is marked as not recommended for new designs. Ensure the selected variant matches the required temperature range and packaging format for the production environment.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select based on the required gain configuration (+1, -1, or +2) and the need for output clamping capabilities. Evaluate the trade-off between bandwidth and load capacitance when driving capacitive loads like A/D converters. Consider the board layout requirements for high-frequency stability, including the use of solid ground planes and low-inductance components.

Instrumentation, Op Amps, Buffer Amps Part Context

This component belongs to the HFA11xx series of ultra-high-speed buffer amplifiers. It is designed for applications requiring wide bandwidth and low distortion. The device utilizes a proprietary complementary bipolar UHF-1 process to achieve high slew rates and fast settling times suitable for demanding signal processing tasks.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. The datasheet explicitly states that no recommended replacement exists for this product.

Instrumentation, Op Amps, Buffer Amps FAQ

How is the closed-loop gain selected?

Gain selection is accomplished via connections to the inputs: applying the signal to +IN with -IN floating selects +1; grounding -IN selects +2; and applying the signal to -IN with +IN grounded selects -1.

What is the function of the VH and VL pins?

The VH and VL pins allow user-programmable output voltage limiting. VH sets the upper output limit and VL sets the lower clamp level to prevent damage or saturation in later stages.