Rainbow Electronics MAX1446 - Manual

General Description
The MAX1446 10-bit, +3V analog-to-digital converter
(ADC) features a fully differential input, a pipelined 10-
stage ADC architecture with digital error correction and
wideband track and hold (T/H) incorporating a fully dif-
ferential signal path. This ADC is optimized for low-
power, high dynamic performance applications in
imaging and digital communications. The MAX1446
operates from a single +2.7V to +3.6V supply, consum-
ing only 90mW while delivering a 59.5dB signal-to-
noise ratio (SNR) at a 20MHz input frequency. The fully
differential input stage has a 400MHz, -3dB bandwidth
and may be operated with single-ended inputs. In addi-
tion to low operating power, the MAX1446 features a
5µA power-down mode for idle periods.
An internal +2.048V precision bandgap reference is
used to set the ADC full-scale range. A flexible refer-
ence structure allows the user to supply a buffered,
direct or externally derived reference for applications
requiring increased accuracy or a different input volt-
age range.
Lower and higher speed, pin-compatible versions of
the MAX1446 are also available. Refer to the MAX1444
data sheet for a 40Msps version and the MAX1448 data
sheet for a 80Msps version.
The MAX1446 has parallel, offset binary, three-state
outputs that can be operated from +1.7V to +3.3V to
allow flexible interfacing. The device is available in a
5x5mm, 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 +3.0V Operation
♦ Excellent Dynamic Performance
59.5dB SNR at f IN = 20MHz
73dB SFDR at f IN = 20MHz
♦ Low Power:
30mA (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
MAX1446
10-Bit, 60Msps, +3.0V, 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
MAX1446
Functional Diagram
19-1729; Rev 0; 7/00
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
EVALUATION KIT
AVAILABLE
Ordering Information
PART TEMP. RANGE PIN-PACKAGE
MAX1446EHJ -40 °C to +85°C 32 TQFP