MAX1449 Datasheet, PDF (1/18 Pages) Maxim Integrated Products – 10-Bit, 105Msps, Single +3.3V, Low-Power ADC with Internal Reference

19-4802; Rev 0; 10/00
EVALUATION ^{KIT AVAILABLE}
10-Bit, 105Msps, Single +3.3V, Low-Power
ADC with Internal Reference
General Description
The MAX1449 +3.3V, 10-bit analog-to-digital converter
(ADC) features a fully differential input, a pipelined 10-
stage ADC architecture with wideband track-and-hold
(T/H), and digital error correction incorporating a fully
differential signal path. The ADC is optimized for low-
power, high-dynamic performance in imaging and digi-
tal communications applications. The converter
operates from a single +2.7V to +3.6V supply, consum-
ing only 186mW while delivering a 58.5dB (typ) signal-
to-noise ratio (SNR) at a 20MHz input frequency. The
fully differential input stage has a -3dB 400MHz band-
width and may be operated with single-ended inputs. In
addition to low operating power, the MAX1449 features
a 5µA power-down mode for idle periods.
An internal +2.048V precision bandgap reference is
used to set the ADC’s full-scale range. A flexible refer-
ence structure allow’s the user to supply a buffered,
direct, or externally derived reference for applications
requiring increased accuracy or a different input volt-
age range.
Lower speed, pin-compatible versions of the MAX1449
are also available. Refer to the MAX1444 data sheet for
a 40Msps version, the MAX1446 data sheet for a
60Msps version, and the MAX1448 data sheet for 80Msps.
The MAX1449 has parallel, offset binary, CMOS-com-
patible, three-state outputs that can be operated from
+1.7V to +3.6V to allow flexible interfacing. The device
is available in a 5mm x 5mm 32-pin TQFP package and
is specified over the extended industrial (-40°C to
+85°C) temperature range.
________________________Applications
Ultrasound Imaging
CCD Imaging
Baseband and IF Digitization
Digital Set-Top Boxes
Video Digitizing Applications
Pin Configuration appears at end of data sheet.
Features
o Single +3.3V Operation
o Excellent Dynamic Performance
58.5dB SNR at f_IN = 20MHz
72dBc SFDR at f_IN = 20MHz
o Low Power
62mA (Normal Operation)
5µA (Shutdown Mode)
o Fully Differential Analog Input
o Wide 2Vp-p Differential Input Voltage Range
o 400MHz -3dB Input Bandwidth
o On-Chip +2.048V Precision Bandgap Reference
o CMOS-Compatible Three-State Outputs
o 32-Pin TQFP Package
o Evaluation Kit Available
PART
MAX1449EHJ
Ordering Information
TEMP. RANGE
-40°C to +85°C
PIN-PACKAGE
32 TQFP
Pin-Compatible, Lower Speed
Selection Table
PART NUMBER
MAX1444
MAX1446
MAX1448
SAMPLING SPEED
40Msps
60Msps
80Msps
Functional Diagram
CLK
IN+
T/H
IN-
PD
REF
CONTROL
PIPELINE ADC
REF SYSTEM +
BIAS
MAX1449
V_DD
GND
D
E
C
10
OUTPUT
DRIVERS
D9–D0
OV_DD
OGND
REFOUT REFIN REFP COM REFN
OE
________________________________________________________________ Maxim Integrated Products 1
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