SPT SPT103 Datasheet

4755 Forge Road, Colorado Springs, Colorado 80907, USA

Phone: [phone] FAX: [phone] Website: http://www.spt.com E-Mail: [e-mail]

FAST SETTLING, HIGH CURRENT WIDEBAND OP AMP

Features

■

80MHz full-power bandwidth
(20Vpp, 100Ω)

■

200mA output current

■

0.4% settling in 10ns

■

6000V/µs slew rate

■

4ns rise and fall times (20V)

■

Direct replacement for CLC103

Applications

■

Coaxial line driving

■

DAC current to voltage amplifier

■

Flash A to D driving

■

Baseband and video communications

■

Radar and IF processors

General Description

The SPT103 is a high-power, wideband op amp designed for the
most demanding high-speed applications. The wide bandwidth,
fast settling, linear phase, and very low harmonic distortion
provide the designer with the signal fidelity needed in applications
such as driving flash A to Ds. The 80MHz full-power bandwidth
and 200mA output current of the SPT103 eliminate the need for
power buffers in most applications; the SPT103 is an excellent
choice for driving large high-speed signals into coaxial lines.

In the design of the SPT103 special care was taken in order to
guarantee that the output settles quickly to within 0.4% of the final
value for use with ultra fast flash A to D converters. This is
one of the most demanding of all op amp requirements since
settling time is affected by the op amps bandwidth, passband
gain flatness, and harmonic distortion. This high degree of
performance ensures excellent performance in many other de­manding applications as well.

The dynamic performance of the SPT103 is based on a current
feedback topology that provides performance far beyond that
available from conventional op amp designs. Unlike conventional
op amps where optimum gain-bandwidth product occurs at a high
gain, minimum settling time at a gain of -1, and maximum slew
rate at a gain of +1, the SPT103 provides consistent predictable
performance across its entire gain range. For example, the table
below shows how the -3dB bandwidth remain nearly constant
over a wide range of gains. And since the amplifier is inherently
stable, no external compensation is required. The result is
shorter design time and the ability to accommodate design
changes (in gain, for example) without loss of performance or
redesign of compensation circuits.

The SPT103 is constructed using thin film resistor/bipolar transis­tor technology, and is available in the following version:

SPT103AIJ -25°C to +85°C 24-pin Ceramic DIP

Typical Performance

Small Signal Pulse Response

2 10/9/98

SPT103

SPT103 Electrical Characteristics

(Av = +20V, VCC = ±15V, RL = 100Ω; unless specified)

Absolute Maximum Ratings

V

CC

(reversed supplies will destroy part) ±20V
junction temperature (see thermal model) +175°C
thermal resistance see thermal model
storage temperature -65°C to +150°C
lead temperature (soldering 10s) +300°C
output current ±200mA
operating temperature: AI -25°C to +85°C

Notes

1) * AI 100% tested at +25°C

✝ AI sample tested at +25°C

2) This rating protects against damage to the input stage caused by saturation of either the input or output stages. Under

transient conditions not exceeding 1µs (duty cycle not exceeding 10% maximum input voltage may be as large as twice the maximum V

cm

should never exceed ±5V. (Vcm is the voltage at the non-inverting input, pin 7).

3) This rating protects against exceeding transistor collector-emitter breakdown ratings. Recommended VCC is ±15V.