LTC2249

1

2249f

FEATURES

DESCRIPTIO

TYPICAL APPLICATIO

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

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)

14-Bit, 80Msps

Low Power 3V ADC

The LTC

converter designed for digitizing high frequency, wide

dynamic range signals. The LTC2249 is perfect for de-

manding imaging and communications applications with

AC performance that includes 73dB SNR and 90dB SFDR

for signals well beyond the Nyquist frequency.

DC specs include ±1LSB INL (typ), ±0.5LSB DNL (typ) and

no missing codes over temperature. The transition noise

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.

SNR vs Input Frequency,

–1dB, 2V Range

APPLICATIO S

–

+

INPUT

S/H

CORRECTION

LOGIC

OUTPUT

DRIVERS

14-BIT

PIPELINED

ADC CORE

CLOCK/DUTY

CYCLE

CONTROL

FLEXIBLE

REFERENCE

D13

•

•

•

D0

CLK

REFH

REFL

ANALOG

INPUT

2229 TA01

OGND

INPUT FREQUENCY (MHz)

0

65

66

68

69

70

75

72

50

100

2249 G09

67

73

74

71

150

200