1

LT1229/LT1230

TYPICAL APPLICATIO

APPLICATIO S

DESCRIPTIO

FEATURES

Dual and Quad 100MHz

Current Feedback Amplifiers

The LT

feedback amplifiers are designed for maximum perfor-

mance in small packages. Using industry standard pinouts,

the dual is available in the 8-pin miniDIP and the 8-pin SO

package while the quad is in the 14-pin DIP and 14-pin SO.

The amplifiers are designed to operate on almost any

available supply voltage from 4V (

±2V) to 30V (±15V).

These current feedback amplifiers have very high input

impedance and make excellent buffer amplifiers. They

maintain their wide bandwidth for almost all closed-loop

voltage gains. The amplifiers drive over 30mA of output

current and are optimized to drive low impedance loads,

such as cables, with excellent linearity at high frequencies.

The LT1229/LT1230 are manufactured on Linear

Technology’s proprietary complementary bipolar process.

For a single amplifier like these see the LT1227 and for

better DC accuracy see the LT1223.

s

100MHz Bandwidth

s

1000V/

µs Slew Rate

s

Low Cost

s

30mA Output Drive Current

s

0.04% Differential Gain

s

0.1

° Differential Phase

s

High Input Impedance: 25M

Ω, 3pF

s

Wide Supply Range:

±2V to ±15V

s

Low Supply Current: 6mA Per Amplifier

s

Inputs Common Mode to Within 1.5V of Supplies

s

Outputs Swing Within 0.8V of Supplies

s

Video Instrumentation Amplifiers

s

Cable Drivers

s

RGB Amplifiers

s

Test Equipment Amplifiers

–

+

LT1229 • TA01

12.1k

750

Ω

1% RESISTORS

WORST CASE CMRR = 22dB

TYPICALLY = 38dB

HIGH INPUT RESISTANCE DOES NOT LOAD CABLE EVEN

WHEN POWER IS OFF

1/2

LT1229

G – 1

187

Ω

750

Ω

3.01k

–

+

1/2

LT1229

3.01k

3.01k

12.1k

BNC INPUTS

Video Loop Through Amplifier

Loop Through Amplifier Frequency

Response

FREQUENCY (Hz)

10

–60

–50

–40

–30

–20

–10

10

100

1k

10k

100M

LT1229 • TA02

100k

1M

10M

0

COMMON MODE SIGNAL

NORMAL SIGNAL

, LTC and LT are registered trademarks of Linear Technology Corporation.