LTC2385-18

1

238518f

For more information www.linear.com/LTC2385-18

TYPICAL APPLICATION

FEATURES

DESCRIPTION

18-Bit, 5Msps SAR ADC

The LTC®2385-18 is a low noise, high speed, 18-bit 5Msps

successive approximation register (SAR) ADC ideally

suited for a wide range of applications. The combination

of excellent linearity and wide dynamic range makes the

LTC2385-18 ideal for high speed imaging and instru-

mentation applications. No-latency operation provides a

unique solution for high speed control loop applications.

The very low distortion at high input frequencies enables

communications applications requiring wide dynamic

range and significant signal bandwidth.

To support high speed operation while minimizing the

number of data lines, the LTC2385-18 features a serial

LVDS digital interface. The LVDS interface has one-lane

and two-lane output modes, allowing the user to optimize

the interface data rate for each application.

APPLICATIONS

n

5Msps Throughput Rate

n

No Pipeline Delay, No Cycle Latency

n

n

n

Nyquist Sampling Up to 2.5MHz Input

n

Guaranteed 18-Bit, No Missing Codes

n

±1.5LSB INL (Max)

n

n

5V and 2.5V Supplies

n

Internal 20ppm/°C (Max) Reference

n

Serial LVDS Interface

n

78mW Power Dissipation

n

32-Pin (5mm × 5mm) QFN Package

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High Speed Data Acquisition

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Imaging

n

Communications

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Control Loops

n

Instrumentation

n

ATE

L

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

Technology Corporation. All other trademarks are the property of their respective owners.

Protected by U.S. Patents, including 7705765, 8232905, 8810443. Other patents are pending.

SNR = 96.2dB

THD = –117dB

SINAD = 96.1dB

SFDR = 119dB

FREQUENCY (MHz)

0

0.5

1

1.5

2

2.5

–160

–140

–120

–100

–80

–60

–40

–20

0

238518 TA02

SAMPLE

CLOCK

10µF

0.1µF

0.1µF

2.5V

5V

0.1µF

0.1µF

CLK

DCO

DA

DB

LVDS

INTERFACE

238518 TA01

680pF

24.9

24.9

GND

REFIN

REFBUF REFGND

LTC2385-18

680pF

TWOLANES

TESTPAT

PD

CNV

2.5V

0.1µF

+

–

4.096V

0V

4.096V

0V