MAX2683 Datasheet, PDF (1/18 Pages) Maxim Integrated Products – 3.5GHz Downconverter Mixers with Selectable LO Doubler

19-1620; Rev 0; 1/00
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3.5GHz Downconverter Mixers
with Selectable LO Doubler
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
o 3.4GHz to 3.8GHz RF Frequency Range
o 100MHz to 400MHz IF Frequency Range
(MAX2683)
800MHz to 1000MHz IF Frequency Range
(MAX2684)
o Logic-Enabled LO Frequency Doubler
o Conversion Gain
+6.7dB (MAX2683)
+1dB (MAX2684)
o Programmable IIP3
+7dBm to +11dBm (MAX2683)
+8dBm to +12dBm (MAX2684)
o +2.7V to +5.5V Single-Supply Operation
o Ultra-Small 16-Pin TSSOP-EP Package
PART
MAX2683EUE
MAX2684EUE
*Exposed pad
Ordering Information
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
16 TSSOP-EP*
16 TSSOP-EP*
Typical Operating Circuit appears at end of data sheet.
Functional Diagram
IFOUT+
RFIN
IFOUT-
V_CC
BIAS
BIAS
GND
LO
BUFFER _x1
MAX2683
MAX2684
LO
DOUBLER x2
LOX1
LOX2 _ENX2
TOP VIEW
Pin Configuration
V_CC 1
GND 2
GND 3
RFIN 4
GND 5
ENX2 6
LOX2 7
LOX1 8
MAX2683
MAX2684
16 BIAS
15 GND
14 IFOUT+
13 GND
12 GND
11 IFOUT-
10 GND
9 GND
TSSOP-EP
________________________________________________________________ Maxim Integrated Products 1
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