HFA1112IB

Instrumentation, Op Amps, Buffer Amps Overview

The HFA1112IB is a closed-loop buffer amplifier manufactured by Renesas Electronics Corporation using the proprietary complementary bipolar UHF-1 process. It features an ultra-wide -3dB bandwidth of 850MHz and a very fast slew rate of 2400V/µs. The device provides high output current capability of 60mA and excellent gain accuracy with a typical value of 0.99V/V. It supports user-programmable closed-loop gains of +1, -1, or +2 without external resistors. The part operates within a supply voltage range of 9V to 11V and consumes 21mA of supply current. Input bias current is specified at 25µA with an input offset voltage of 8mV.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• User-programmable closed-loop gain selection for +1, -1, or +2 configurations without requiring external resistors
• Ultra-high speed performance characterized by an 850MHz bandwidth and 2400V/µs slew rate
• High output drive capability delivering up to 60mA of output current
• Low distortion and excellent gain flatness suitable for precision signal buffering

Instrumentation, Op Amps, Buffer Amps Applications

• RF and IF processors
• Driving flash A/D converters
• High-speed communications systems
• Video switching and routing
• Radar systems

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify component authenticity through authorized Renesas distributors due to potential legacy status. Confirm RoHS compliance requirements as standard versions may differ from Pb-Free plus anneal variants. Check for specific ordering suffixes that indicate package type or environmental compliance. Ensure supply chain stability as this component may be subject to end-of-life notifications. Validate datasheet revisions to confirm electrical parameters match design specifications.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this buffer when high-speed signal integrity is critical for video or RF applications. The programmable gain feature simplifies board layout by eliminating external feedback resistors. Consider the 850MHz bandwidth for wideband signal processing needs. Evaluate the 60mA output current against load requirements for line driving tasks. Compare settling time specifications if precise transient response is necessary for data acquisition systems.

Instrumentation, Op Amps, Buffer Amps Part Context

The HFA1112 series belongs to Intersil's family of ultra-high-speed programmable gain buffer amplifiers. Manufactured on the UHF-1 complementary bipolar process, these devices are designed for demanding analog signal processing applications. The HFA1112IB specifically denotes the industrial temperature grade variant in an 8-pin DIP package. This series offers flexibility for upgrading low-gain amplifiers while reducing component count in video and communication circuits.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Check for HFA1112IP as a pin-compatible alternative in different packaging. Verify functional equivalence with HFA1110/883 for standard buffer applications. Consult Renesas documentation for any updated replacement parts following corporate acquisitions.