LT6236/LT6237

1

623637f

TYPICAL APPLICATION

FEATURES

DESCRIPTION

Rail-to-Rail Output

215MHz, 1.1nV/√Hz

Op Amp/SAR ADC Driver

output op amps that feature 1.1nV/√Hz input referred noise

voltage density and draw only 3.5mA of supply current per

amplifier. These amplifiers combine very low noise and

supply current with a 215MHz gain bandwidth product

and a 70V/μs slew rate. Low noise, fast settling time and

low offset voltage make this amplifier optimal to drive

low noise, high speed SAR ADCs. The LT6236 includes a

shutdown feature that can be used to reduce the supply

current to less than 10μA.

This amplifier family has an output that swings within

50mV of either supply rail to maximize the signal dynamic

range in low supply applications and is specified on 3.3V,

5V and ±5V supplies.

The LT6236/LT6237 are upgrades to the LT6230/LT6231,

offering similar performance with reduced wideband noise

beyond 100kHz.

Differentially Driving a SAR ADC

–1dBFS, 32768-Point FFT

APPLICATIONS

MSOP Packages

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

ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property

of their respective owners.

623637 TA01a

270pF

38.3Ω

38.3Ω

LOWPASS FILTERS

LTC2389-18

270pF

49.9Ω

49.9Ω

18-BIT

2.5Msps

–

+

+

–

1/2 LT6237

1/2 LT6237

FREQUENCY (MHz)

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1

62367 TA01b

0

–150

–140

–130

–120

–110

–100

–90

–80

–70

–60

–50

–40

–30

–20

–10

1.2

HD2 = –129.5dBc

HD3 = –118.7dBc

SFDR = 117.7dB

THD = –116.8dB

SNR = 99.7dB

SINAD = 98.9dB