16-bit low noise A/D converter LTC2217

The LTC®2217 is a 16-bit A/D converter with a sampling rate of 105Msps, designed for digitizing high frequency, wide dynamic range signals with input frequencies up to 400MHz. The input range of the ADC is fixed at 2.75VP-P.

The LTC2217 is ideally suited for demanding communications applications, with AC performance including 81.3dBFS noise floor and 100dB spurious-free dynamic range (SFDR). Ultra-low jitter of 85fsRMS enables undersampling of high input frequencies while maintaining excellent noise performance. Maximum DC specifications include ±3.5LSB INL, ±1LSB DNL (no missing codes).

The digital outputs can be either differential LVDS or single-ended CMOS. The CMOS outputs are available in two format options: a single bus running at full data rate or a multiplexed bus running at half data rate. A separate output supply allows the CMOS outputs to swing from 0.5V to 3.6V.

The ENC+ and ENC– inputs can be driven differentially or single-ended with a sine wave, PECL, LVDS, TTL, or CMOS input. An optional clock duty cycle stabilizer enables high performance at full speed and over a wide range of clock duty cycles.

Features

Sampling rate: 105Msps

81.3dBFS Noise Floor

100dB SFDR

SFDR > 90dB (at 70MHz)

85fsRMS Jitter

2.75VP-P Input Range

400MHz Full Power Bandwidth S/H (Sample and Hold)

Optional internal dither

Optional data output randomizer

LVDS or CMOS output

Single 3.3V power supply

Power consumption: 1.19W

Clock Duty Cycle Stabilizer

Pin compatible with LTC2208

64-pin (9mm x 9mm) QFN package

Typical Application

Encapsulation

QFN-64