Rainbow Electronics MAX2684 - Manual

General Description
The MAX2683/MAX2684 are super-high-performance,
low-cost downconverter mixers intended for wireless
local loop (WLL) and digital microwave radio (DMR)
applications in the 3.4GHz to 3.8GHz frequency band.
The MAX2683 is optimized for downconversion to IF
frequencies between 100MHz and 400MHz, and allows
both high-side and low-side local oscillator (LO) injec-
tion. The MAX2684 is optimized for IF frequencies
between 800MHz and 1000MHz, and allows low-side
LO injection. A logic-level control enables an internal
frequency doubler on both devices, allowing the exter-
nal LO source to run at full or half frequency. An internal
LO filter reduces LO harmonics and spurious mixing.
The MAX2683/MAX2684 feature an externally adjustable
bias control, set with a single resistor, that lets the user
trade supply current for linearity to optimize system per-
formance. These devices use a double-balanced
Gilbert-cell architecture with single-ended RF and LO
inputs and differential open-collector IF output ports.
Differential IF ports provide a wideband, flexible inter-
face for either single-ended or differential applications.
The MAX2683/MAX2684 operate from a single +2.7V to
+5.5V supply. The devices are packaged in an ultra-
small 16-pin TSSOP-EP package with an exposed pad-
dle for optimum performance at 3.5GHz.
________________________Applications
Wireless Local Loop (WLL)
Digital Microwave Radio (DMR)
Wireless Broadband Access
Features
♦ 3.4GHz to 3.8GHz RF Frequency Range
♦ 100MHz to 400MHz IF Frequency Range
(MAX2683)
800MHz to 1000MHz IF Frequency Range
(MAX2684)
♦ Logic-Enabled LO Frequency Doubler
♦ Conversion Gain
+6.7dB (MAX2683)
+1dB (MAX2684)
♦ Programmable IIP3
+7dBm to +11dBm (MAX2683)
+8dBm to +12dBm (MAX2684)
♦ +2.7V to +5.5V Single-Supply Operation
♦ Ultra-Small 16-Pin TSSOP-EP Package
MAX2683/MAX2684
3.5GHz Downconverter Mixers
with Selectable LO Doubler
________________________________________________________________ Maxim Integrated Products 1
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
V CC BIAS
GND
IFOUT+
GND
GND
IFOUT-
GND
GND
TOP VIEW
MAX2683
MAX2684
GND
GND
ENX2
RFIN
GND
LOX2
LOX1
TSSOP-EP
Pin Configuration
19-1620; Rev 1; 5/01
EVALUATION KIT
AVAILABLE
Ordering Information
Typical Operating Circuit appears at end of data sheet.
16 TSSOP-EP*
PIN-PACKAGE TEMP. RANGE
-40°C to +85°C MAX2683EUE
PART
16 TSSOP-EP* -40°C to +85°C MAX2684EUE
*Exposed pad
RFIN
IFOUT+
IFOUT-
V CC
BIAS
GND
LO
BUFFER
LO
DOUBLER
LOX1 LOX2 ENX2
MAX2683
MAX2684
BIAS
x1
x2
Functional Diagram
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.