MAX19985AETX+ Maxim Integrated Products, MAX19985AETX+ Datasheet

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MAX19985AETX+

Manufacturer Part Number
MAX19985AETX+
Description
RF Mixer IC MIXER DOWNCONV earity, 700MHz to 10
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX19985AETX+

Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX19985A high-linearity, dual-channel, downcon-
version mixer is designed to provide approximately
8.7dB gain, +25.5dBm of IIP3, and 9.0dB of noise fig-
ure for 700MHz to 1000MHz diversity receiver applica-
tions. With an optimized LO frequency range of
900MHz to 1300MHz, this mixer is ideal for high-side
LO injection architectures in the cellular and new
700MHz bands. Low-side LO injection is supported by
the MAX19985, which is pin-pin and functionally com-
patible with the MAX19985A.
In addition to offering excellent linearity and noise per-
formance, the MAX19985A also yields a high level
of component integration. This device includes two
double-balanced passive mixer cores, two LO buffers,
a dual-input LO selectable switch, and a pair of differ-
ential IF output amplifiers. On-chip baluns are also inte-
grated to allow for single-ended RF and LO inputs.
The MAX19985A requires a nominal LO drive of 0dBm
and a typical supply current of 330mA at V
or 280mA at V
The MAX19985/MAX19985A are pin compatible with
the MAX19995/MAX19995A series of 1700MHz to
2200MHz mixers and pin similar with the MAX19997A/
MAX19999 series of 1850MHz to 3800MHz mixers,
making this entire family of downconverters ideal for
applications where a common PCB layout is used
across multiple frequency bands.
The MAX19985A is available in a 6mm x 6mm, 36-pin
thin QFN package with an exposed pad. Electrical per-
formance is guaranteed over the extended temperature
range of T
19-4185; Rev 0; 8/08
cdma2000 is a registered trademark of Telecommunications
Industry Association.
WiMAX is a trademark of WiMAX Forum.
iDEN is a registered trademark of Motorola, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Dual, SiGe, High-Linearity, 700MHz to 1000MHz
Downconversion Mixer with LO Buffer/Switch
850MHz WCDMA and cdma2000
700MHz LTE/WiMAX™ Base Stations
GSM850/900 2G and 2.5G EDGE Base Stations
iDEN
Fixed Broadband Wireless Access
Wireless Local Loop
Private Mobile Radios
Military Systems
C
®
= -40°C to +85°C.
Base Stations
CC
= +3.3V.
________________________________________________________________ Maxim Integrated Products
General Description
Applications
®
Base Stations
CC
= +5.0V
o 700MHz to 1000MHz RF Frequency Range
o 900MHz to 1300MHz LO Frequency Range
o 50MHz to 500MHz IF Frequency Range
o 8.7dB Typical Conversion Gain
o 9.0dB Typical Noise Figure
o +25.5dBm Typical Input IP3
o +12.6dBm Typical Input 1dB Compression Point
o 76dBc Typical 2LO-2RF Spurious Rejection at
o Dual Channels Ideal for Diversity Receiver
o 48dB Typical Channel-to-Channel Isolation
o Low -3dBm to +3dBm LO Drive
o Integrated LO Buffer
o Internal RF and LO Baluns for Single-Ended
o Built-In SPDT LO Switch with 46dB LO1-to-LO2
o Pin Compatible with the MAX19995/MAX19995A
o Pin Similar to the MAX19997A/MAX19999 Series
o Single +5.0V or +3.3V Supply
o External Current-Setting Resistors Provide Option
+ Denotes a lead-free/RoHS-compliant package.
* EP = Exposed pad.
T = Tape and reel.
Typical Application Circuit and Pin Configuration appear at
end of data sheet.
MAX19985AETX+
MAX19985AETX+T
P
Applications
Inputs
Isolation and 50ns Switching Time
Series of 1700MHz to 2200MHz Mixers
of 1850MHz to 3800MHz Mixers
for Operating Device in Reduced-Power/Reduced-
Performance Mode
RF
PART
= -10dBm
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Ordering Information
PIN-PACKAGE
36 Thin QFN-EP*
36 Thin QFN-EP*
Features
1

Related parts for MAX19985AETX+

MAX19985AETX+ Summary of contents

Page 1

... External Current-Setting Resistors Provide Option Applications for Operating Device in Reduced-Power/Reduced- Performance Mode ® Base Stations PART MAX19985AETX+ MAX19985AETX+T + Denotes a lead-free/RoHS-compliant package Exposed pad Tape and reel. Typical Application Circuit and Pin Configuration appear at end of data sheet. Features Ordering Information TEMP RANGE PIN-PACKAGE -40° ...

Page 2

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch ABSOLUTE MAXIMUM RATINGS V to GND ...........................................................-0.3V to +5.5V CC LO1, LO2 to GND ...............................................................±0.3V Any Other Pins to GND...............................-0. RFMAIN, RFDIV, and LO_ Input Power ..........................+15dBm ...

Page 3

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch RECOMMENDED AC OPERATING CONDITIONS PARAMETER SYMBOL RF Frequency LO Frequency IF Frequency LO Drive Level +5.0V SUPPLY AC ELECTRICAL CHARACTERISTICS ( Typical Application Circuit , V = +4.75V to ...

Page 4

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch +5.0V SUPPLY AC ELECTRICAL CHARACTERISTICS (continued) ( Typical Application Circuit , V = +4.75V to +5.25V, RF and LO ports are driven from 50Ω sources ...

Page 5

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch +3.3V SUPPLY AC ELECTRICAL CHARACTERISTICS ( Typical Application Circuit , RF and LO ports are driven from 50Ω sources. Typical values are 0dBm ...

Page 6

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch +3.3V SUPPLY AC ELECTRICAL CHARACTERISTICS (continued) ( Typical Application Circuit , RF and LO ports are driven from 50Ω sources. Typical values are 0dBm, f ...

Page 7

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch ( Typical Application Circuit , V = +5.0V otherwise noted.) CONVERSION GAIN vs. RF FREQUENCY -30° +85°C C ...

Page 8

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch ( Typical Application Circuit , V = +5.0V otherwise noted.) 2LO-2RF RESPONSE vs. RF FREQUENCY -5dBm +85° ...

Page 9

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch ( Typical Application Circuit , V = +5.0V otherwise noted.) CHANNEL ISOLATION vs. RF FREQUENCY -30°C, +25°C, +85° ...

Page 10

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch ( Typical Application Circuit , V = +5.0V otherwise noted.) LO LEAKAGE AT RF PORT vs. LO FREQUENCY - -30° +25°C ...

Page 11

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch ( Typical Application Circuit , V = +5.0V otherwise noted.) RF PORT RETURN LOSS vs. RF FREQUENCY 200MHz -3dBm, 0dBm, ...

Page 12

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch ( Typical Application Circuit , V = +5.0V otherwise noted.) INPUT P vs. RF FREQUENCY 1dB (VARIOUS LO AND IF BIAS ...

Page 13

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch ( Typical Application Circuit , V = +3.3V otherwise noted.) CONVERSION GAIN vs. RF FREQUENCY 3. -30° ...

Page 14

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch ( Typical Application Circuit , V = +3.3V otherwise noted.) 2LO-2RF RESPONSE vs. RF FREQUENCY 3. -5dBm ...

Page 15

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch ( Typical Application Circuit , V = +3.3V otherwise noted.) CHANNEL ISOLATION vs. RF FREQUENCY 3. -30°C, +25°C, ...

Page 16

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch ( Typical Application Circuit , V = +3.3V otherwise noted.) LO LEAKAGE AT RF PORT vs. LO FREQUENCY - 3. -30°C ...

Page 17

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch ( Typical Application Circuit , V = +3.3V otherwise noted.) RF PORT RETURN LOSS vs. RF FREQUENCY 3. 200MHz ...

Page 18

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch PIN NAME 1 RFMAIN 2 TAPMAIN 12, 20, 22, GND 24, 25, 26 10, 16 TAPDIV 9 ...

Page 19

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch Detailed Description The MAX19985A is a dual-channel downconverter designed to provide 8.7dB of conversion gain, +25.5dBm of IIP3, +12.6dBm typical input 1dB com- pression point, and a 9.0dB noise ...

Page 20

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch Applications Information Input and Output Matching The RF and LO inputs are internally matched to 50Ω. No matching components are required. The RF port input return loss is typically ...

Page 21

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch device package to the PCB. The MAX19985A evaluation kit can be used as a reference for board layout. Gerber files are available upon request at www.maxim-ic.com. Power-Supply Bypassing Proper ...

Page 22

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch C18 RFMAIN RF MAIN INPUT C1 TAPMAIN C3 C2 GND GND GND C6 C7 TAPDIV RFDIV RF DIV INPUT ...

Page 23

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 23 © 2008 Maxim Integrated Products ...

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