LTC2143-12_15 datasheet(1/38 Pages) LINER

Part #	LTC2143-12

Description	12-Bit, 125Msps/105Msps/ 80Msps Low Power Dual ADCs

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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1

21454312fa

LTC2145-12/

LTC2144-12/LTC2143-12

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

12-Bit, 125Msps/105Msps/

80Msps Low Power Dual ADCs

n Communications

n Cellular Base Stations

n Software Defined Radios

n Portable Medical Imaging

n Multi-Channel Data Acquisition

n Nondestructive Testing

n 2-Channel Simultaneously Sampling ADC

n 70.6dB SNR

n 89dB SFDR

n Low Power: 183mW/144mW/109mW Total

92mW/72mW/55mW per Channel

n Single 1.8V Supply

n CMOS, DDR CMOS, or DDR LVDS Outputs

n Selectable Input Ranges: 1VP-P to 2VP-P

n 750MHz Full Power Bandwidth S/H

n Optional Data Output Randomizer

n Optional Clock Duty Cycle Stabilizer

n Shutdown and Nap Modes

n Serial SPI Port for Configuration

n 64-Pin (9mm × 9mm) QFN Package

The LTC

®2145-12/LTC2144-12/LTC2143-12 are 2-channel

simultaneous sampling 12-bit A/D converters designed

for digitizing high frequency, wide dynamic range signals.

They are perfect for demanding communications applica-

tions with AC performance that includes 70.6dB SNR and

89dB spurious free dynamic range (SFDR). Ultralow jitter

of 0.08psRMS allows undersampling of IF frequencies with

excellent noise performance.

DC specs include ±0.3LSB INL (typ), ±0.1LSB DNL (typ)

and no missing codes over temperature. The transition

noise is 0.3LSBRMS.

The digital outputs can be either full rate CMOS, double

data rate CMOS, or double data rate LVDS. A separate

output power supply allows the CMOS output swing to

range from 1.2V to 1.8V.

The ENC+ and ENC– inputs may be driven differentially

or single-ended with a sine wave, PECL, LVDS, TTL, or

CMOS inputs. An optional clock duty cycle stabilizer al-

lows high performance at full speed for a wide range of

clock duty cycles.

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.

2-Tone FFT, fIN = 70MHz and 69MHz

CMOS,

DDR CMOS

OR

DDR LVDS

OUTPUTS

1.8V

VDD

1.8V

OVDD

CLOCK

CONTROL

D1_11

D1_0

21454312 TA01a

CH 1

ANALOG

INPUT

OUTPUT

DRIVERS

GND

OGND

S/H

12-BIT

ADC CORE

CH 2

ANALOG

INPUT

S/H

12-BIT

ADC CORE

D2_11

D2_0

125MHz

CLOCK

FREQUENCY (MHz)

0

–100

–110

–120

–70

–60

–80

–90

–50

–30

–40

–20

–10

0

10

20

30

40

50

60

21854312 TA01b

FREQUENCY (MHz)

0

10

20

30

40

50

60

21854312 TA01b

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LTC2143-12 Datasheet(PDF) 1 Page - Linear Technology

LTC2143-12 Datasheet(HTML) 1 Page - Linear Technology

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