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LTC2249| Datasheet

By datasheet - November 4th, 2008

LTC2249| Datasheet

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LTC2249 14-Bit, 80Msps Low Power 3V ADC

FEATURES

DESCRIPTIO

Sample Rate: 80Msps Single 3V Supply (2.7V to 3.4V) Low Power: 222mW 73dB SNR at 70MHz Input 90dB SFDR at 70MHz Input 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

The LTC 2249 is a 14-bit 80Msps, low power 3V A/D converter designed for digitizing high frequency, wide dynamic range signals. The LTC2249 is perfect for demanding 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 is a low 1.2LSBRMS. 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 performance 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.

APPLICATIO S

Wireless and Wired Broadband Communication Imaging Systems Ultrasound Spectral Analysis Portable Instrumentation

TYPICAL APPLICATIO
REFH REFL FLEXIBLE REFERENCE

OVDD 14-BIT PIPELINED ADC CORE SNR (dBFS)

+
ANALOG INPUT INPUT S/H

CORRECTION LOGIC

OUTPUT DRIVERS

D13 D0 OGND

CLOCK/DUTY CYCLE CONTROL
2229 TA01

CLK

U
SNR vs Input Frequency, 1dB, 2V Range
75 74 73 72 71 70 69 68 67 66 65 0 100 50 150 INPUT FREQUENCY (MHz) 200
2249 G09

U

U

2249fa

1


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