LTC2369-18

1

236918fa

18-Bit, 1.6Msps, Pseudo-

Differential Unipolar SAR

ADC with 96.5dB SNR

TYPICAL APPLICATION

FEATURES

DESCRIPTION

18-bit successive approximation register (SAR) ADC.

Operating from a 2.5V supply, the LTC2369-18 has a 0V

ranging from 2.5V to 5.1V. The LTC2369-18 consumes only

18mW and achieves ±2.5LSB INL maximum, no missing

codes at 18 bits with 96.5dB SNR.

The LTC2369-18 has a high speed SPI-compatible serial

interface that supports 1.8V, 2.5V, 3.3V and 5V logic while

also featuring a daisy-chain mode. The fast 1.6Msps

throughput with no cycle latency makes the LTC2369-18

ideally suited for a wide variety of high speed applications.

An internal oscillator sets the conversion time, easing exter-

nal timing considerations. The LTC2369-18 automatically

powers down between conversions, leading to reduced

power dissipation that scales with the sampling rate.

APPLICATIONS

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

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

property of their respective owners. Protected by U.S. Patents including 7705765.

5.1Ω

0V

10nF

–

+

SAMPLE CLOCK

236918 TA01a

10μF

0.1μF

2.5V

REF

1.8V TO 5V

2.5V TO 5.1V

47μF

(X5R, 0805 SIZE)

REF

GND

CHAIN

RDL/SDI

SDO

SCK

BUSY

CNV

LTC2369-18

FREQUENCY (kHz)

0

100 200 300 400

800

700

600

500

–180

–60

–40

–20

–80

–100

–120

–140

–160

0

236918 TA01b

SNR = 96.5dB

THD = –127dB

SINAD = 96.5dB

SFDR = 134dB