Rainbow Electronics MAX1420 - Manual

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.
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
♦ +3.3V Single Power Supply
♦ 67dB SNR at f
IN = 5MHz
♦ 66dB SNR at f
IN = 15MHz
♦ Internal +2.048V Precision Bandgap Reference
♦ Differential, Wideband Input T/H Amplifier
♦ Power-Down Modes:
218mW (Reference Shutdown Mode)
10µW (Shutdown Mode)
♦ Space-Saving 48-Pin TQFP Package
MAX1420
12-Bit, 60Msps, +3.3V, Low-Power ADC
with Internal Reference
________________________________________________________________ Maxim Integrated Products 1
D9
D8
D7
D6
DV DD
DV
DD
DGND
DGND
D5
D4
D3
D2
AGND
AV DD
AV DD
AGND
AGND
INP
INN
AGND
AGND
AV DD
AV DD
AGND
1
2
3
4
5
6
7
8
9
10
11
12
36
35
34
33
32
31
30
29
28
27
26
25
48-TQFP
MAX1420
AGND AV
DD
AV
DD
AGND
CLK CLK
AGND AV
DD
DV
DD
DGND
D0 D1
13 14 15 16 17 18 19 20 21 22 23 24
48 47 46 45 44 43 42 41 40 39 38 37
AGND AV
DD
CML REFN REFP REFIN AV
DD
AGND PD OE D11 D10
Pin Configuration
19-1981; Rev 0; 5/01
Ordering Information
PART TEMP. RANGE PIN-PACKAGE
MAX1420CCM 0°C to +70°C 48 TQFP
MAX1420ECM -40 °C to +85°C 48 TQFP
Functional diagram appears at end of data sheet.