LTC2246 datasheet(1/24 Pages) LINER

Part #	LTC2246

Description	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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LTC2248/LTC2247/LTC2246

1

224876fa

FEATURES

DESCRIPTIO

APPLICATIO S

TYPICAL APPLICATIO

■

Sample Rate: 65Msps/40Msps/25Msps

■ Single 3V Supply (2.7V to 3.4V)

■ Low Power: 205mW/120mW/75mW

■

74.3dB SNR

■ 90dB SFDR

■ No Missing Codes

■

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

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

× 5mm) QFN Package

14-Bit, 65/40/25Msps

Low Power 3V ADCs

The LTC

®2248/LTC2247/LTC2246 are 14-bit 65Msps/

40Msps/25Msps, low power 3V A/D converters designed

for digitizing high frequency, wide dynamic range signals.

The LTC2248/LTC2247/LTC2246 are perfect for demand-

ing imaging and communications applications with AC

performance that includes 74.3dB SNR and 90dB SFDR

for signals at the Nyquist frequency.

DC specs include

±1LSB 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 3.6V

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.

–

+

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

2249 TA01a

OVDD

OGND

INPUT FREQUENCY (MHZ)

0

200

2249 TAO1b

50

100

150

75

74

73

72

71

70

LTC2248: SNR vs Input Frequency,

–1dB, 2V Range, 65Msps

■ Wireless and Wired Broadband Communication

■ Imaging Systems

■

Ultrasound

■ 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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