MAX1420 Datasheet, PDF (1/17 Pages) Maxim Integrated Products – 12-Bit, 60Msps, +3.3V, Low-Power ADC with Internal Reference

19-1981; Rev 0; 5/01
12-Bit, 60Msps, +3.3V, Low-Power ADC
with Internal Reference
General Description
The MAX1420, +3.3V, 12-bit analog-to-digital converter
(ADC) features a fully-differential input, pipelined, 12-
stage ADC architecture with wideband track-and-hold
(T/H) and digital error correction, incorporating a fully-
differential signal path. The MAX1420 is optimized for
low-power, high dynamic performance applications in
imaging and digital communications. The converter
operates from a single +3.3V supply, and consumes
only 221mW. The fully-differential input stage has a
small signal -3dB bandwidth of 400MHz and may be
operated with single-ended inputs.
An internal +2.048V precision bandgap reference sets
the full-scale range of the ADC. A flexible reference
structure accommodates an internal reference, or
externally applied buffered or unbuffered reference for
applications that require increased accuracy and a dif-
ferent input voltage range.
In addition to low operating power, the MAX1420 fea-
tures two power-down modes: reference power-down
and shutdown mode. In reference power-down, the
internal bandgap reference is deactivated, which
results in a typical 2mA supply current reduction. A full
shutdown mode is available to maximize power savings
during idle periods.
The MAX1420 provides parallel, offset binary, CMOS-
compatible three-state outputs.
The MAX1420 is available in a 7mm ✕ 7mm, 48-pin
TQFP package, and is specified over the commercial
(0°C to +70°C) and the extended industrial (-40°C to
+85°C) temperature range.
Pin-compatible lower speed versions of the MAX1420
are also available. Please refer to the MAX1421 data
sheet for 40Msps and the MAX1422 data sheet for
20Msps.
________________________Applications
Medical Ultrasound Imaging
CCD Pixel Processing
IR Focal Plane Arrays
Radar
IF & Baseband Digitization
Features
o +3.3V Single Power Supply
o 67dB SNR at f_IN = 5MHz
o 66dB SNR at f_IN = 15MHz
o Internal +2.048V Precision Bandgap Reference
o Differential, Wideband Input T/H Amplifier
o Power-Down Modes:
218mW (Reference Shutdown Mode)
10µW (Shutdown Mode)
o Space-Saving 48-Pin TQFP Package
PART
MAX1420CCM
MAX1420ECM
Ordering Information
TEMP. RANGE
0°C to +70°C
-40°C to +85°C
PIN-PACKAGE
48 TQFP
48 TQFP
AGND 1
AV_DD 2
AV_DD 3
AGND 4
AGND 5
INP 6
INN 7
AGND 8
AGND 9
AV_DD 10
AV_DD 11
AGND 12
Pin Configuration
MAX1420
36 D9
35 D8
34 D7
33 D6
32 DV_DD
31 DV_DD
30 DGND
29 DGND
28 D5
27 D4
26 D3
25 D2
Functional diagram appears at end of data sheet.
48-TQFP
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
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