描述 Description

The HFA1412/883 is a quad closed loop Buffer featuring

user programmable gain and high speed performance. Manufactured on Intersil’s proprietary complementary bipolar

UHF-1 process, this device offers wide -3dB bandwidth of

340MHz, very fast slew rate, excellent gain flatness and high

output current.

A unique feature of the pinout allows the user to select a voltage gain of +1, -1, or +2, without the use of any external

components. Gain selection is accomplished via connections to the inputs, as described in the “Application Information” section. The result is a more flexible product, fewer part

types in inventory, and more efficient use of board space.

Compatibility with existing op amp pinouts provides flexibility

to upgrade low gain amplifiers, while decreasing component

count. Unlike most buffers, the standard pinout provides an

upgrade path should a higher closed loop gain be needed at

a future date.

特性 Features

? This Circuit is Processed in Accordance to MIL-STD883 and is Fully Conformant Under the Provisions of

Paragraph 1.2.1.

? User Programmable For Closed-Loop Gains of +1, -1

or +2 Without Use of External Resistors

? Standard Operational Amplifier Pinout

? Low Supply Current. . . . . . . . . . . 5.9mA/Op Amp (Typ)

? Excellent Gain Accuracy. . . . . . . . . . . . . . 0.99V/V (Typ)

? Wide -3dB Bandwidth . . . . . . . . . . . . . . . 340MHz (Typ)

? Fast Slew Rate . . . . . . . . . . . . . . . . . . . . 1155V/μs (Typ)

? High Input Impedance . . . . . . . . . . . . . . . . . . 1M? (Typ)

? Excellent Gain Flatness (to 50MHz) . . . . ±0.02dB (Typ)

? Fast Overdrive Recovery. . . . . . . . . . . . . . . <10ns (Typ)

Applications

? Flash A/D Driver

? Video Switching and Routing

? Pulse and Video Amplifiers

? Wideband Amplifiers

? RF/IF Signal Processing

? Medical Imaging Systems