HFA1145IB

Overview

The HFA1145IB is a high-speed, low-power current feedback video operational amplifier manufactured using Intersil’s proprietary complementary bipolar UHF-1 process. It features a TTL/CMOS compatible disable control on pin 8 that reduces supply current and forces the output into a high impedance state when pulled low. The device operates within a temperature range of -40°C to 85°C and is housed in an 8-lead SOIC package. Key electrical specifications include a typical supply current of 5.8mA, a wide -3dB bandwidth of 330MHz at a gain of +2, and a very fast slew rate of 1000V/µs.

Feature Summary

• Features a TTL/CMOS compatible disable control that reduces power consumption and isolates the output for switching applications
• Built on a proprietary complementary bipolar UHF-1 process for high speed and low power performance
• Provides excellent gain flatness and differential gain/phase specifications suitable for component and composite video systems

Applications

• Flash A/D Drivers
• Video Switching and Routing
• Professional Video Processing
• Video Digitizing Boards/Systems
• Multiplexed A/D Applications

Procurement Notes

Verify the datasheet revision (FN3955 Rev 5.00) and manufacturer documentation before implementation. Confirm the specific ordering suffix matches the required package type and RoHS compliance status. Ensure the design accounts for the device's asymmetrical slew rates and pulse undershoot characteristics when driving capacitive loads or operating with negative voltage components.

Selection Notes

Select this component for designs requiring a low-power current feedback amplifier with integrated output disabling capabilities. It serves as a direct pin-compatible upgrade for the CLC410. Designers must account for the requirement of a feedback resistor even in unity gain configurations and ensure proper PCB layout to minimize parasitic capacitance at the inverting input.

Part Context

The HFA1145 is part of a family of high-speed video amplifiers from Intersil, now under Renesas Electronics. It is specifically engineered for video signal processing where low distortion and high bandwidth are critical. The device is not recommended for new designs, with official documentation indicating no recommended replacement and advising contact with the Technical Support Center for further assistance.

Replacement Considerations

Official documentation states there is no recommended replacement for the HFA1145. Users are advised to contact the Technical Support Center for guidance on alternative solutions.