_______________General Description
The MAX2100 family of quadrature digitizers offers
complete solutions to digital demodulation problems.
The flagship of the MAX2100 family is the MAX2101 6-
bit Quadrature Digitizer. The subcircuits derived from
the MAX2101 provide excellent starting points for the
RF IC designer to develop components that bridge the
gap between existing RF downconverters and CMOS
digital signal processors.
Each MAX2100 subcircuit comes with a detailed sche-
matic, TEKSPICE or PSPICE netlist, models, and GDSII
layout for incorporation in your own custom ASIC
design. These subcircuits can be used separately or in
combination to produce complete demodulation and
digitization components for intermediate frequencies
(IF) ranging from 70MHz to 700MHz, and for base
bandwidths to 80MHz*. All are powered by a +5V sup-
ply, and are implemented in Maxim’s proprietary GST-1
wafer fabrication process with NPN fT= 13GHz.
Maxim does not guarantee specifications or fitness for
use of these subcircuits in your custom ASIC. The sub-
circuits are intended to demonstrate Maxim’s process
and design capability, and to provide circuit designers
with a “head start” in developing their own ASIC.
Operation of these subcircuits in a customer-designed
ASIC is the responsibility of the customer.
________________________Applications
Recovery of PSK and QAM Modulated RF Carriers
Direct-Broadcast Satellite (DBS) Systems
Television Receive-Only (TVRO) Systems
Cable Television (CATV) Systems
____________________________Features
♦Operation at IFs from 70MHz to 700MHz*
♦Precision Quadrature Demodulation
(1°, 0.2dB typ Mismatch, f = 650MHz)
♦Matched Active Filters with Electronically Variable
Cutoff from 10MHz to 30MHz
♦40dB of AGC Range
♦High-Speed 6-Bit ADCs with 5.8 (typ)
Effective Bits (fIN = 30MHz, fC= 120Msps) and
200MHz Input Bandwidth
______________Ordering Information
MAX2100 Subcircuits
Quadrature Digitizer Circuits
________________________________________________________________
Maxim Integrated Products
1
IF IN
fc = 10MHz to 30MHz
0° -90°
*AVAILABLE AS A STANDARD PRODUCT.
SEE MAX2101 DATA SHEET FOR SPECIFICATIONS AND ORDERING INFORMATION.
6
6
Q OUT
I OUT
X2113
X2118
X2111 X2114
X2112
MAX2101*
X2114
A/D CLOCK
60MHz
400MHz to
700MHz
LO
X2116
_______________________________________________________________Block Diagram
Call toll free 1-800-998-8800 for free samples or literature.
19-0370; Rev 0; 2/95
PART
X21nnPFD
X21nnPFT PSPICE
PSPICE
SIMULATOR MEDIUM
3.5"Floppy
3.5"Floppy
FORMAT
DOS
TAR
X21nnPTT
X21nnPHT PSPICE
PSPICE TAR
TAR
Tape
9-track 6250 bpi
X21nnPLT
X21nnPET PSPICE
PSPICE TAR
TAR
9-track 1600 bpi
Electronic mail
X21nnTFT
X21nnTTT TEKSPICE
TEKSPICE TAR
TAR
3.5"Floppy
Tape
X21nnTHT TEKSPICE TAR9-track 6250 bpi
X21nnTLT
X21nnTET TEKSPICE
TEKSPICE TAR
TAR
9-track 1600 bpi
Electronic mail
The MAX2100 cells are available in the above formats to
customers who have purchased a GST-1 ASIC Start-Up
Package and signed Maxim’s Non-Disclosure Agreement.
*VCO and Quadrature Generator limited to 400MHz to 700MHz