LTC2250 데이터 시트보기 (PDF) - Linear Technology

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LTC2250

10-Bit, 125/105Msps Low Noise 3V ADCs

Linear Technology 

FEATURES

■ Sample Rate: 125Msps/105Msps

■ Single 3V Supply (2.85V to 3.4V)

■ Low Power: 395mW/320mW

■ 61.6dB SNR

■ 85dB SFDR

■ No Missing Codes

■ Flexible Input: 1VP-P to 2VP-P Range

■ 640MHz Full Power Bandwidth S/H

■ Clock Duty Cycle Stabilizer

■ Shutdown and Nap Modes

■ Pin Compatible Family:

125Msps: LTC2251 (10-Bit), LTC2253 (12-Bit)

105Msps: LTC2250 (10-Bit), LTC2252 (12-Bit)

80Msps: LTC2239 (10-Bit), LTC2229 (12-Bit)

65Msps: LTC2238 (10-Bit), LTC2228 (12-Bit)

40Msps: LTC2237 (10-Bit), LTC2227 (12-Bit)

25Msps: LTC2236 (10-Bit), LTC2226 (12-Bit)

■ 32-Pin (5mm × 5mm) QFN Package

U

APPLICATIO S

■ Wireless and Wired Broadband Communication

■ Imaging Systems

■ Ultrasound

■ Spectral Analysis

■ Portable Instrumentation

LTC2251/LTC2250

10-Bit, 125/105Msps

Low Noise 3V ADCs

DESCRIPTIO

The LTC®2251/LTC2250 are 10-bit 125Msps/105Msps,

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

frequency, wide dynamic range signals. The LTC2251/

LTC2250 are perfect for demanding imaging and commu-

nications applications with AC performance that includes

61.6dB SNR and 85dB SFDR for signals at the Nyquist

frequency.

DC specs include ±0.1LSB INL (typ), ±0.05LSB DNL (typ)

and ±0.6LSB INL, ±0.6LSB DNL over temperature. The

transition noise is a low 0.08LSBRMS.

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.

TYPICAL APPLICATIO

REFH

REFL

ANALOG

INPUT

FLEXIBLE

REFERENCE

+

INPUT

S/H

–

CLOCK/DUTY

CYCLE

CONTROL

CLK

10-BIT

PIPELINED

ADC CORE

CORRECTION

LOGIC

OUTPUT

DRIVERS

OVDD

D9

•

•

•

D0

OGND

22510 TA01

LTC2251: SNR vs Input Frequency,

–1dB, 2V Range, 125Msps

65

64

63

62

61

60

59

58

57

56

55

0

50 100 150 200 250 300 350

INPUT FREQUENCY (MHz) 22510 G09

22510fa

1

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