
General Description
The MAX1428 is a 5V, high-speed, high-performance
analog-to-digital converter (ADC) featuring a fully differ-
ential wideband track-and-hold (T/H) and a 15-bit con-
verter core. The MAX1428 is optimized for multichannel,
multimode receivers, which require the ADC to meet very
stringent dynamic performance requirements. With a
noise floor of -78.4dBFS, the MAX1428 allows for the
design of receivers with superior sensitivity.
The MAX1428 achieves two-tone, spurious-free dynamic
range (SFDR) of -82dBc for input tones of 69MHz and
71MHz. Its excellent signal-to-noise ratio (SNR) of 73.9dB
and single-tone SFDR performance (SFDR1/SFDR2) of
83dBc/91dBc at f
IN
= 70MHz and a sampling rate of
80Msps make this part ideal for high-performance digital
receivers.
The MAX1428 operates from an analog 5V and a digital
3V supply, features a 2.56V
P-P
full-scale input range,
and allows for a sampling speed of up to 80Msps. The
input T/H operates with a -1dB full-power bandwidth of
260MHz.
The MAX1428 features parallel, CMOS-compatible out-
puts in two’s-complement format. To enable the interface
with a wide range of logic devices, this ADC provides a
separate output driver power-supply range of 2.3V to
3.5V. The MAX1428 is manufactured in an 8mm x 8mm,
56-pin thin QFN package with exposed paddle (EP) for
low thermal resistance, and is specified for the extended
industrial (-40°C to +85°C) temperature range.
Note that IF parts MAX1418, MAX1428, and MAX1430
(see
Pin-Compatible Higher/Lower Speed Versions
Selection
table) are recommended for applications that
require high dynamic performance for input frequen-
cies greater than f
CLK
/3. Unlike its baseband counter-
part MAX1427, the MAX1428 is optimized for input
frequencies greater than f
CLK
/3.
Applications
Cellular Base-Station Transceiver Systems (BTS)
Wireless Local Loop (WLL)
Single- and Multicarrier Receivers
Multistandard Receivers
E911 Location Receivers
Power Amplifier Linearity Correction
Antenna Array Processing
Features
80Msps Minimum Sampling Rate
-78.4dBFS Noise Floor
Excellent Dynamic Performance
73.9dB SNR at f
IN
= 70MHz and A
IN
= -2dBFS
83dBc/91dBc Single-Tone SFDR1/SFDR2 at
f
IN
= 70MHz and A
IN
= -2dBFS
-82dB Multitone SFDR at f
IN1
= 69MHz
and f
IN2
= 71MHz
Less than 0.25ps Sampling Jitter
Fully Differential Analog Input Voltage Range of
2.56V
P-P
CMOS-Compatible Two’s-Complement Data Output
Separate Data Valid Clock and Overrange Outputs
Flexible-Input Clock Buffer
EV Kit Available for MAX1428
(Order MAX1427EVKIT)
M
15-Bit, 80Msps ADC with -78.4dBFS
Noise Floor for IF Applications
________________________________________________________________
Maxim Integrated Products
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.
1
Ordering Information
19-3433; Rev 0; 10/04
EVALUATION KIT
AVAILABLE
Pin Configuration appears at end of data sheet.
PART
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
56 Thin QFN-EP*
MAX1428ETN
*
EP = Exposed paddle.
Pin-Compatible Higher/Lower
Speed Versions Selection
PART
SPEED GRADE
(Msps)
TARGET
APPLICATION
MAX1418
MAX1419
MAX1427
MAX1428
MAX1429
MAX1430
65
65
80
80
100
100
IF
Baseband
Baseband
IF
Baseband
IF