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LTC2236| Datasheet

By datasheet - November 4th, 2008

LTC2236| Datasheet

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LTC2238/LTC2237/LTC2236 10-Bit, 65/40/25Msps Low Noise 3V ADCs DESCRIPTIO
The LTC 2238/LTC2237/LTC2236 are 10-bit 65Msps/ 40Msps/25Msps, low power 3V A/D converters designed for digitizing high frequency, wide dynamic range signals. The LTC2238/LTC2237/LTC2236 are perfect for demanding imaging and communications applications with AC performance that includes 61.8dB SNR and 85dB SFDR for signals at the Nyquist frequency. DC specs include 0.1LSB INL (typ), 0.05LSB DNL (typ) and 0.5LSB INL, 0.5LSB DNL over temperature. The transition noise is a low 0.07LSBRMS. 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.

FEATURES

Sample Rate: 65Msps/40Msps/25Msps Single 3V Supply (2.7V to 3.4V) Low Power: 205mW/120mW/75mW 61.8dB SNR 85dB 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: LTC2251 (10-Bit), LTC2253 (12-Bit) 105Msps: LTC2250 (10-Bit), LTC2252 (12-Bit) 80Msps: LTC2239 (10-Bit), LTC2229 (12-Bit) 65Msps: LTC2238 (10-Bit), LTC2228 (12-Bit) 40Msps: LTC2237 (10-Bit), LTC2227 (12-Bit) 25Msps: LTC2236 (10-Bit), LTC2226 (12-Bit) 32-Pin (5mm 5mm) QFN Package

APPLICATIO S

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

TYPICAL APPLICATIO
REFH REFL FLEXIBLE REFERENCE

OVDD

+
ANALOG INPUT INPUT S/H

CORRECTION LOGIC

SNR (dBFS)

10-BIT PIPELINED ADC CORE

OUTPUT DRIVERS

D9 D0 OGND

CLOCK/DUTY CYCLE CONTROL
223876 TA01

CLK

U

U

U

LTC2238: SNR vs Input Frequency, 1dB, 2V Range, 65Msps
62.5

61.5

60.5

59.5

58.5

57.5

0

100 50 150 INPUT FREQUENCY (MHz)

200
223876 G09

223876fa

1


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