The MAX12555 is a 3.3V, 14-bit, 95Msps analog-to-digital
converter (ADC) featuring a fully differential wideband
track-and-hold (T/H) input amplifier, driving a low-noise
internal quantizer. The analog input stage accepts single ended
or differential signals. The MAX12555 is optimized
for high dynamic performance, low power, and small
size. Excellent dynamic performance is maintained from
baseband to input frequencies of 175MHz and beyond,
making the MAX12555 ideal for intermediate frequency
(IF) sampling applications.
Powered from a single 3.3V supply, the MAX12555 consumes
only 497mW while delivering a typical 72.1dB
signal-to-noise ratio (SNR) performance at a 175MHz
input frequency. In addition to low operating power, the
MAX12555 features a 300µW power-down mode to
conserve power during idle periods.
A flexible reference structure allows the MAX12555 to use
the internal 2.048V bandgap reference or accept an
externally applied reference. The reference structure
allows the full-scale analog input range to be adjusted
from ±0.35V to ±1.10V. The MAX12555 provides a common-
mode reference to simplify design and reduce external
component count in differential analog input circuits.
The MAX12555 supports either a single-ended or differential
input clock. Wide variations in the clock duty
cycle are compensated with the ADC's internal dutycycle
equalizer (DCE).
ADC conversion results are available through a 14-bit,
parallel, CMOS-compatible output bus. The digital output
format is pin selectable to be either two's complement
or Gray code. A data-valid indicator eliminates
external components that are normally required for reliable
digital interfacing. A separate digital power input
accepts a wide 1.7V to 3.6V supply, allowing the
MAX12555 to interface with various logic levels.
The MAX12555 is available in a 6mm x 6mm x 0.8mm,
40-pin thin QFN package with exposed paddle (EP),
and is specified for the extended industrial (-40°C to
+85°C) temperature range.
See a parametric table of the complete family of pin-compatible, 12-/14-bit high-speed ADCs.
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