LT1818/LT1819

1

18189fb

TYPICAL APPLICATION

DESCRIPTION

400MHz, 2500V/µs, 9mA

Single/Dual Operational

Amplifiers

slew rate, low noise and distortion operational amplifiers

with excellent DC performance. The LT1818/LT1819 have

been designed for wider bandwidth and slew rate, much

lower input offset voltage and lower noise and distortion

than devices with comparable supply current. The circuit

topology is a voltage feedback amplifier with the excellent

slewing characteristics of a current feedback amplifier.

The output drives a 100Ω load to ±3.8V with ±5V sup-

plies. On a single 5V supply, the output swings from 1V

to 4V with a 100Ω load connected to 2.5V. The amplifier

is unity-gain stable with a 20pF capacitive load without the

need for a series resistor. Harmonic distortion is –85dBc

The LT1818/LT1819 are manufactured on Linear Tech-

nology’s advanced low voltage complementary bipolar

process. The LT1818 (single op amp) is available in

TSOT-23 and SO-8 packages; the LT1819 (dual op amp)

is available in MSOP-8 and SO-8 packages.

Single Supply Unity-Gain ADC Driver for Oversampling Applications

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

FEATURES

APPLICATIONS

FFT of Single Supply ADC Driver

FREQUENCY (Hz)

0

–10

–20

–30

–40

–50

–60

–70

–80

–90

–100

–110

0

18189 TA02

5M

10M

15M

20M

25M

SFDR = 78dB

8192 POINT FFT

NO WINDOWING

OR AVERAGING

2

3

–

+

LT1818

2.5VDC

±1VAC

18189 TA01

18pF

2.5V

51.1Ω

5V

5V

+

LTC1744

14 BITS

50Msps

FULL SCALE)

–