General Description
The MAX12554 is a 3.3V, 14-bit, 80Msps 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 MAX12554 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 MAX12554 ideal for intermediatefrequency (IF) sampling applications.
Powered from a single 3.3V supply, the MAX12554 consumes only 429mW while delivering a typical 70.9dB
signal-to-noise ratio (SNR) performance at a 175MHz
input frequency. In addition to low operating power, the
MAX12554 features a 300µW power-down mode to
conserve power during idle periods.
A flexible reference structure allows the MAX12554 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 MAX12554 provides a common-mode reference to simplify design and reduce external component count in differential analog input circuits.
The MAX12554 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
MAX12554 to interface with various logic levels.
The MAX12554 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 the Pin-Compatible Versions table for a complete
family of 14-bit and 12-bit high-speed ADCs.
Applications
IF and Baseband Communication Receivers
Cellular, Point-to-Point Microwave, HFC, WLAN
Medical Imaging Including Positron Emission
Tomography (PET)
Video Imaging
Portable Instrumentation
Low-Power Data Acquisition
Features
♦ Direct IF Sampling Up to 400MHz
♦ Excellent Dynamic Performance
72.4dB/70.9dB SNR at fIN= 3MHz/175MHz
86.2dBc/82.5dBc SFDR at fIN= 3MHz/175MHz
♦ Low Noise Floor: -74.8dBFS
♦ 3.3V Low-Power Operation
396mW (Single-Ended Clock Mode)
429mW (Differential Clock Mode)
300µW (Power-Down Mode)
♦ Fully Differential or Single-Ended Analog Input
♦ Adjustable Full-Scale Analog Input Range
±0.35V to ±1.10V
♦ Common-Mode Reference
♦ CMOS-Compatible Outputs in Two’s Complement
or Gray Code
♦ Data-Valid Indicator Simplifies Digital Interface
♦ Data Out-of-Range Indicator
♦ Miniature, 6mm x 6mm x 0.8mm 40-Pin Thin QFN
Package with Exposed Paddle
♦ Evaluation Kit Available (Order MAX12555EVKIT)
MAX12554
14-Bit, 80Msps, 3.3V ADC
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
19-3440; Rev 0; 10/04
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
EVALUATION KIT
AVAILABLE