14-Bit, 125Msps Low Power 3V ADCs

The LTC2255/LTC2254 are 14-bit 125Msps/105Msps, low power 3V A/D converters designed for digitizing high frequency, wide dynamic range signals. The LTC2255/LTC2254 are perfect for demanding imaging and communications applications with AC performance that includes 72.3dB SNR and 85dB 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 1.3 LSBRMS.

A single 3V supply allows low power operation. A separate output supply allows the outputs to drive 0.5V to 3.3V 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.

Applications

* Wireless and Wired Broadband Communication

* Imaging Systems

* Ultrasound

* Spectral Analysis

* Portable Instrumentation

* Sample Rate: 125Msps/105Msps

* Single 3V Supply (2.85V to 3.4V)

* Low Power: 395mW/320mW

* 72.4dB SNR

* 88dB SFDR

* No Missing Codes

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

* 640MHz 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