MAX1444 Datasheet, PDF (1/20 Pages) Maxim Integrated Products – 10-Bit, 40Msps, 3.0V, Low-Power ADC with Internal Reference

19-1745; Rev 1; 11/03
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10-Bit, 40Msps, 3.0V, Low-Power
ADC with Internal Reference
General Description
The MAX1444 10-bit, 3V analog-to-digital converter
(ADC) features a pipelined 10-stage ADC architecture
with fully differential wideband track-and-hold (T/H)
input and digital error correction incorporating a fully
differential signal path. This ADC is optimized for low-
power, high dynamic performance applications in
imaging and digital communications. The MAX1444
operates from a single 2.7V to 3.6V supply, consuming
only 57mW 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 MAX1444 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.
Higher speed, pin-compatible versions of the MAX1444
are also available. Please refer to the MAX1446 data
sheet (60Msps) and the MAX1448 data sheet
(80Msps).
The MAX1444 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 5x5mm 32-pin TQFP package and is
specified over the extended industrial (-40°C to +85°C)
temperature range.
Features
o Single 3.0V Operation
o Excellent Dynamic Performance
59.5dB SNR at f_IN = 20MHz
74dBc SFDR at f_IN = 20MHz
o Low Power
19mA (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
MAX1444EHJ
Ordering Information
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
32 TQFP
Pin Configuration
TOP VIEW
________________________Applications
Ultrasound Imaging
CCD Imaging
Baseband and IF Digitization
Digital Set-Top Boxes
Video Digitizing Applications
REFN 1
COM 2
V_DD 3
GND 4
GND 5
IN+ 6
IN- 7
GND 8
32 31 30 29 28 27 26 25
MAX1444
24 D4
23 OGND
22 T.P.
21 OV_DD
20 D5
19 D6
18 D7
17 D8
9 10 11 12 13 14 15 16
Functional Diagram appears at end of data sheet.
TQFP
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.