LTC2297 datasheet(1/28 Pages) LINER

Part #	LTC2297

Description	Dual 14-Bit, 65/40/25Msps Low Power 3V ADCs

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LTC2298/LTC2297/LTC2296

1

229876f

FEATURES

DESCRIPTIO

APPLICATIO S

TYPICAL APPLICATIO

■ Integrated Dual 14-Bit ADCs

■ Sample Rate: 65Msps/40Msps/25Msps

■ Single 3V Supply (2.7V to 3.4V)

■ Low Power: 400mW/235mW/150mW

■ 74dB SNR up to 70MHz Input

■ 85dB SFDR up to 70MHz Input

■ 110dB Channel Isolation at 100MHz

■ Multiplexed or Separate Data Bus

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

■ 575MHz Full Power Bandwidth S/H

■ Clock Duty Cycle Stabilizer

■ Shutdown and Nap Modes

■ Pin Compatible Family

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

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

25Msps: LTC2291 (12-Bit), LTC2296 (14-Bit)

■ 64-Pin (9mm × 9mm) QFN Package

Dual 14-Bit, 65/40/25Msps

Low Power 3V ADCs

The LTC

®2298/LTC2297/LTC2296 are 14-bit 65Msps/

40Msps/25Msps, low power dual 3V A/D converters de-

signed for digitizing high frequency, wide dynamic range

signals. The LTC2298/LTC2297/LTC2296 are perfect for

demanding imaging and communications applications

with AC performance that includes 74dB SNR and 85dB

SFDR for signals well beyond the Nyquist frequency.

DC specs include ±1.2LSB INL (typ), ±0.5LSB DNL (typ)

and no missing codes over temperature. The transition

noise is a low 1LSBRMS.

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

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

logic. An optional multiplexer allows both channels to

share a digital output bus.

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.

LTC2298: SNR vs Input Frequency,

–1dB, 2V Range, 65Msps

–

+

INPUT

S/H

ANALOG

INPUT A

ANALOG

INPUT B

CLK A

CLK B

14-BIT

PIPELINED

ADC CORE

CLOCK/DUTY CYCLE

CONTROL

OUTPUT

DRIVERS

•

OVDD

OGND

MUX

D13A

D0A

•

OVDD

OGND

229876 TA01

D13B

D0B

–

+

OUTPUT

DRIVERS

INPUT

S/H

14-BIT

PIPELINED

ADC CORE

CLOCK/DUTY CYCLE

CONTROL

INPUT FREQUENCY (MHz)

0

200

229876 TA01b

50

100

150

75

74

73

72

71

70

■ Wireless and Wired Broadband Communication

■ Imaging Systems

■ Spectral Analysis

■ Portable Instrumentation

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

All other trademarks are the property of their respective owners.

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