LTC2285

1

2285fb

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

Dual 14-Bit, 125Msps

Low Power 3V ADC

A/D converter designed for digitizing high frequency,

wide dynamic range signals. The LTC2285 is perfect for

demanding imaging and communications applications

with AC performance that includes 72.2dB SNR and 82dB

SFDR for signals at the Nyquist frequency.

Typical DC specs include ±1.5LSB INL, ±0.6LSB DNL. The

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

output supply allows the outputs to drive 0.5V to 3.6V

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.

A data ready output clock (CLKOUT) can be used to latch

the output data.

SNR vs Input Frequency,

–1dB, 2V Range

125Msps: LTC2283 (12-Bit), LTC2285 (14-Bit)

105Msps: LTC2282 (12-Bit), LTC2284 (14-Bit)

80Msps: LTC2294 (12-Bit), LTC2299 (14-Bit)

65Msps: LTC2293 (12-Bit), LTC2298 (14-Bit)

40Msps: LTC2292 (12-Bit), LTC2297 (14-Bit)

L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other

trademarks are the property of their respective owners.

–

+

INPUT

S/H

ANALOG

INPUT A

ANALOG

INPUT B

CLK A

CLK B

14-BIT

PIPELINED

ADC CORE

CLOCK/DUTY CYCLE

CONTROL

OUTPUT

DRIVERS

•

•

•

OGND

MUX

CLKOUT

D13A

D0A

•

•

•

OGND

2285 TA01

D13B

D0B

–

+

OUTPUT

DRIVERS

INPUT

S/H

14-BIT

PIPELINED

ADC CORE

CLOCK/DUTY CYCLE

CONTROL

OF

INPUT FREQUENCY (MHz)

0

65

66

68

69

70

75

72

100

200

250

2285 TA01b

67

73

74

71

50

150

300

350