MAX1446_08 Datasheet, PDF (1/20 Pages) Maxim Integrated Products – 10-Bit, 60Msps, 3.0V, Low-Power ADC with Internal Reference

19-1729; Rev 4; 11/08
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10-Bit, 60Msps, 3.0V, Low-Power
ADC with Internal Reference
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, consuming
only 90mW while delivering a 59.5dB signal-to-noise
ratio (SNR) at a 20MHz input frequency. The fully differ-
ential input stage has a 400MHz, -3dB bandwidth and
may be operated with single-ended inputs. In addition
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 reference
structure allows the user to supply a buffered, direct or
externally derived reference for applications requiring
increased accuracy or a different input voltage range.
Lower and higher speed, pin-compatible versions of
the MAX1446 are also available. Refer to the MAX1444
data sheet for a 40Msps version, the MAX1448 data
sheet for an 80Msps version, and the MAX1449 data
sheet for a 105Msps 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 5mm x
5mm, 32-pin TQFP package and is specified over the
extended industrial (-40°C to +85°C) and automotive
(-40°C to +105°C) temperature ranges.
Features
o Single 3.0V Operation
o Excellent Dynamic Performance
59.5dB SNR at f_IN = 20MHz
73dB SFDR at f_IN = 20MHz
o Low Power:
30mA (Normal Operation)
5µA (Shutdown Mode)
o Fully Differential Analog Input
o Wide 2V_P-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 (MAX1448 EV Kit)
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
MAX1446EHJ+
-40°C to +85°C
32 TQFP
MAX1446GHJ+
-40°C to +105°C 32 TQFP
+Denotes a lead(Pb)-free/RoHS-compliant package.
________________________Applications
Ultrasound Imaging
CCD Imaging
Baseband and IF Digitization
Digital Set-Top Boxes
Video Digitizing Applications
Pin-Compatible,
Lower/Higher Speed Versions
PART
MAX1444
MAX1448
MAX1449
SAMPLING SPEED (Msps)
40
80
105
Functional Diagram
CLK
IN+
T/H
IN-
PD REF
CONTROL
PIPELINE ADC
REF SYSTEM +
BIAS
MAX1446
V_DD
GND
D
E
C
10
OUTPUT
DRIVERS
D9–D0
OV_DD
OGND
REFOUT REFIN REFP COM REFN
OE
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.