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Sample Rate: 125Msps/105Msps

Single 3V Supply (2.85V to 3.4V)

Low Power: 395mW/320mW

72.4dB SNR

88dB SFDR

No Missing Codes

Flexible Input: 1V

P-P

to 2V

P-P

Range

640MHz Full Power Bandwidth S/H

Clock Duty Cycle Stabilizer

Shutdown and Nap Modes

Pin Compatible Family

125Msps: LTC2253 (12-Bit), LTC2255 (14-Bit)

105Msps: LTC2252 (12-Bit), LTC2254 (14-Bit)

80Msps: LTC2229 (12-Bit), LTC2249 (14-Bit)

65Msps: LTC2228 (12-Bit), LTC2248 (14-Bit)

40Msps: LTC2227 (12-Bit), LTC2247 (14-Bit)

25Msps: LTC2226 (12-Bit), LTC2246 (14-Bit)

10Msps: LTC2225 (12-Bit), LTC2245 (14-Bit)

32-Pin (5mm

脳

5mm) QFN Package

The LTC

廬

2255/LTC2254 are 14-bit 125Msps/105Msps,

low power 3V A/D converters designed for digitizing high

frequency, wide dynamic range signals. The LTC2255/

LTC2254 are perfect for demanding imaging and commu-

nications applications with AC performance that includes

72.3dB SNR and 85dB SFDR for signals at the Nyquist

frequency.

DC specs include

鹵1LSB

INL (typ),

鹵0.5LSB

DNL (typ) and

no missing codes over temperature. The transition noise

is a low 1.3 LSB

RMS

.

A single 3V supply allows low power operation. A separate

output supply allows the outputs to drive 0.5V to 3.3V

logic.

A single-ended CLK input controls converter operation. An

optional clock duty cycle stabilizer allows high perfor-

mance at full speed for a wide range of clock duty cycles.

, LTC and LT are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

APPLICATIO S

鈻?/div>

Wireless and Wired Broadband Communication

Imaging Systems

Ultrasound

Spectral Analysis

Portable Instrumentation

TYPICAL APPLICATIO

REFH

REFL

FLEXIBLE

REFERENCE

OV

DD

SNR (dBFS)

+

ANALOG

INPUT

S/H

鈥?/div>

14-BIT

PIPELINED

ADC CORE

CORRECTION

LOGIC

OUTPUT

DRIVERS

D13

鈥?/div>

D0

OGND

CLOCK/DUTY

CYCLE

CONTROL

22554 TA01a

CLK

22554f

U

LTC2255: SNR vs Input Frequency,

鈥?dB, 2V Range, 125Msps

75

74

73

72

71

70

69

68

67

66

65

0

50

100 150 200 250 300 350

33554 G09

INPUT FREQUENCY (MHz)

U

1

型號(hào)

版本

描述

廠商

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