MAX12555 Datasheet, PDF (1/28 Pages) Maxim Integrated Products – 14-Bit, 95Msps, 3.3V ADC

19-3447; Rev 0; 10/04
EVAALVUAAILTAIOBNLEKIT
14-Bit, 95Msps, 3.3V ADC
General Description
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 con-
sumes 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 com-
mon-mode reference to simplify design and reduce exter-
nal component count in differential analog input circuits.
The MAX12555 supports either a single-ended or differ-
ential input clock. Wide variations in the clock duty
cycle are compensated with the ADC’s internal duty-
cycle equalizer (DCE).
ADC conversion results are available through a 14-bit,
parallel, CMOS-compatible output bus. The digital out-
put format is pin selectable to be either two’s comple-
ment or Gray code. A data-valid indicator eliminates
external components that are normally required for reli-
able 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 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
74.2dB/72.1dB SNR at f_IN = 3MHz/175MHz
88.4dBc/74.7dBc SFDR at f_IN = 3MHz/175MHz
♦ Low Noise Floor: 74.7dBFS
♦ 3.3V Low-Power Operation
465mW (Single-Ended Clock Mode)
497mW (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)
Ordering Information
PART*
PIN-PACKAGE
PKG CODE
MAX12555ETL
40 Thin QFN
T4066-3
MAX12555ETL+
40 Thin QFN
T4066-3
+Denotes lead-free package.
*All devices specified over the -40°C to +85°C operating range.
Pin-Compatible Versions
PART
SAMPLING
RATE
(Msps)
RESOLUTION
(BITS)
TARGET
APPLICATION
MAX12555
95
14
IF/Baseband
MAX12554
80
14
IF/Baseband
MAX12553
65
14
IF/Baseband
MAX19538
95
12
IF/Baseband
MAX1209
80
12
IF
MAX1211
65
12
IF
MAX1208
80
12
Baseband
MAX1207
65
12
Baseband
MAX1206
40
12
Baseband
Pin Configuration appears at end of data sheet.
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