HFA1135 is a high performance, low power video operational amplifier from Intersil, with a bandwidth of 360MHz and a slew rate of 1200V/µs. It features user programmable output limiting to protect downstream devices from damage or input saturation.
The HFA1135 is a high‑speed, low‑power current‑feedback amplifier built with Intersil’s proprietary complementary bipolar UHF‑1 process. It offers user‑programmable output limiting via the Vy and V_ pins, fast over‑drive recovery, and a wide 360 MHz -3 dB bandwidth, making it suitable for video, flash A/D drivers, and other high‑speed applications.
The device is supplied in an 8‑lead SOIC package, operates from a 4.5‑5.5 V supply, and features low supply current (6.8 mA), high input impedance (2 MΩ), and a very fast slew rate (1200 V/ps). Detailed electrical specifications, absolute maximum ratings, and application notes are provided, along with recommended feedback resistor values and PCB layout guidelines for optimal performance.
| Gain Flatness (to 50 MHz) | 40.07 dB |
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A 1.5 kΩ feedback resistor is recommended for a gain of +2.
The overdrive recovery time is sub‑nanosecond, typically around 0.3 ns.