Rainbow Electronics MAX1444 - Manual

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, consum-
ing only 57mW 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 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.
________________________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
74dBc SFDR at f
IN
= 20MHz
♦ Low Power
19mA (Normal Operation)
5µA (Shutdown Mode)
♦ Fully Differential Analog Input
♦ Wide 2V
p-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
MAX1444
10-Bit, 40Msps, +3.0V, Low-Power
ADC with Internal Reference
________________________________________________________________ Maxim Integrated Products 1
MAX1444
TQFP
TOP VIEW
32 28 29 30 31 25 26 27
REFIN GND REFOUT D0 REFP D1 D2 D3
10 13 15 14 16 11 12 9
V
DD
GND V
DD PD
CLK
OE
GND
D9
17
18
19
20
21
22
23 OGND
24 D4
T.P.
OV DD
D5
D6
D7
D8
2
3
4
5
6
7
8 GND
IN-
IN+
GND
GND
V DD
COM
1 REFN
Pin Configuration
19-1745; 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
Functional Diagram appears at end of data sheet.
PART TEMP. RANGE PIN-PACKAGE
MAX1444EHJ -40 °C to +85°C 32 TQFP