10-Bit, 125Msps Low Noise 3V ADCs

The LTC2251/LTC2250 are 10-bit 125Msps/105Msps, low noise 3V A/D converters designed for digitizing high frequency, wide dynamic range signals. The LTC2251/LTC2250 are perfect for demanding imaging and communications applications with AC performance that includes 61.6dB SNR and 85dB SFDR for signals at the Nyquist frequency.

DC specs include ±0.1LSB INL (typ), ±0.05LSB DNL (typ) and ±0.6LSB INL, ±0.6LSB DNL over temperature. The transition noise is a low 0.08LSBRMS.

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

* 61.6dB SNR

* 85dB 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: 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