Rainbow Electronics MAX1449 - Manual

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
Features
♦ Single +3.3V Operation
♦ Excellent Dynamic Performance
58.5dB SNR at f IN = 20MHz
72dBc SFDR at f IN = 20MHz
♦ Low Power
62mA (Normal Operation)
5µA (Shutdown Mode)
♦ Fully Differential Analog Input
♦ Wide 2Vp-p Differential Input Voltage Range
♦ 400MHz -3dB Input Bandwidth
♦ On-Chip +2.048V Precision Bandgap Reference
♦ CMOS-Compatible Three-State Outputs
♦ 32-Pin TQFP Package
♦ Evaluation Kit Available
MAX1449
10-Bit, 105Msps, Single +3.3V, Low-Power
ADC with Internal Reference
________________________________________________________________ Maxim Integrated Products 1
CLK
IN+
CONTROL
10
PIPELINE ADC
REF SYSTEM +
BIAS
OUTPUT
DRIVERS
D
E
C
REF
REFIN REFOUT REFP COM REFN OE
V
DD
GND
OV DD
OGND
D9–D0
IN-
PD
T/H
MAX1449
Functional Diagram
19-4802; Rev 0; 10/00
EVALUATION KIT AVAILABLE
Ordering Information
Pin Configuration appears at end of data sheet.
PART TEMP. RANGE PIN-PACKAGE
MAX1449EHJ -40 °C to +85°C 32 TQFP
PART NUMBER SAMPLING SPEED
MAX1444 40Msps
MAX1446 60Msps
MAX1448 80Msps
Pin-Compatible, Lower Speed
Selection Table
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.