SPT220 データシートの表示（PDF） - Signal Processing Technologies

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SPT220

FAST SETTLING, WIDEBAND OPERATIONAL AMPLIFIER

Signal Processing Technologies 

FAST SETTLING, WIDEBAND OPERATIONAL AMPLIFIER

General Description

The SPT220 is a wide bandwidth DC-coupled operational ampli-

fier that defines the state-of-the-art in high speed op amps. A -

3dB bandwidth of DC to 190MHz is achieved using a current

feedback architecture design. Ultra-fast settling time (8nsec to

0.1%) and slew rate (7000V/µsec) make the SPT220 a superior

amplifier for pulsed and digital applications.

Since thermal tail has been eliminated, the SPT220 settles fast

and remains solidly at the desired level. Flat gain and linear

phase (1.2° deviation from linear) from DC to beyond 100MHz

help the SPT220 to achieve distortion levels uncommonly low

relative to conventional op amps.

Using the SPT220 is as easy as adding power supplies and a

gain-setting resistor. The result is reliable, consistent perfor-

mance because such characteristics as bandwidth and settling

time are virtually independent of gain setting. Unlike conventional

op amp designs where the optimum gain-bandwidth product

occurs at a high gain, minimum settling time at a gain of -1,

maximum slew rate at a gain of +1, et cetera, the SPT220 offers

predictable response at gain settings from ±1 to ±50. This,

coupled with consistent performance from unit to unit with no

external compensation, makes the SPT220 a real time and cost-

saver in design and production situations alike.

This combination of features makes the SPT220 appropriate for a

broad range of applications. The wide bandwidth, DC coupling,

and fast settling lend themselves well to high speed D to A and

“flash” A to D applications. Both receivers and transmitters in

optical fiber systems have similar requirements. High gain and

phase linearity and corresponding low distortion make the

SPT220 ideal for many digital communication system applica-

tions, such as in the demodulator, where the need for both DC

coupling and high frequency amplification creates requirements

that are difficult to meet.

The SPT220 is constructed using thin film resistor/bipolar transis-

tor technology, and is available in the following versions:

SPT220AIH -25°C to +85°C 12-pin TO-8 can.

Features

s -3dB bandwidth of 190MHz

s 0.1% settling in 8ns

s 7000V/µs slew rate

s 1.9ns rise and fall times

s Low distortion, linear phase

s Direct replacement for CLC220

Applications

s Very high-speed A to D, D to A conversion

s High-speed fiber optic systems

s Baseband and video communications

s Radar and IF processors

s Very fast risetime pulse amplifiers

Pulse Response

Bottom View

Package Dimensions

Typical Performance

4755 Forge Road, Colorado Springs, Colorado 80907, USA

Phone: (719) 528-2300 FAX: (719) 528-2370 Website: http://www.spt.com E-Mail: sales@spt.com

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