max9985etxt Maxim Integrated Products, Inc., max9985etxt Datasheet

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max9985etxt

Manufacturer Part Number
max9985etxt
Description
Max9985 Dual, Sige, High-linearity, 700mhz To 1000mhz Downconversion Mixer With Lo Buffer/switch
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
The MAX9985 high-linearity, dual-channel downconver-
sion mixer is designed to provide approximately 6dB
gain, +28.5dBm of IIP3, and 10.5dB of noise figure (NF)
ideal for diversity receiver applications. With a 700MHz
to 1000MHz RF frequency range and a 570MHz to
865MHz LO frequency range, this mixer is ideal for low-
side LO injection architectures. In addition, the broad
frequency range makes the MAX9985 ideal for GSM
850/950, 2G/2.5G EDGE, WCDMA, cdma2000
iDEN
The MAX9985 dual-channel downconverter achieves a
high level of component integration. The MAX9985 inte-
grates two double-balanced active mixer cores, two LO
buffers, a dual-input LO selectable switch, and a pair of
differential IF output amplifiers. In addition, integrated
on-chip baluns at the RF and LO ports allow for single-
ended RF and single-ended LO inputs. The MAX9985
requires a typical 0dBm LO drive. Supply current is
adjustable up to 400mA.
The MAX9985 is available in a 36-pin thin QFN pack-
age (6mm x 6mm) with an exposed paddle. Electrical
performance is guaranteed over the extended tempera-
ture range, from T
19-0705 Rev 0; 1/07
cdma2000 is a registered trademark of Telecommunications
Industry Association.
iDEN is a registered trademark of Motorola, Inc.
cdmaOne is a trademark of CDMA Development Group.
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.
Dual, SiGe, High-Linearity, 700MHz to 1000MHz
®
Downconversion Mixer with LO Buffer/Switch
850MHz WCDMA Base Stations
GSM 850/GSM 950, 2G/2.5G EDGE Base
Stations
cdmaOne™ and cdma2000 Base Stations
iDEN Base Stations
Fixed Broadband Wireless Access
Wireless Local Loop
Private Mobile Radios
Military Systems
Digital and Spread-Spectrum Communication
Systems
Microwave Links
base-station applications.
C
________________________________________________________________ Maxim Integrated Products
= -40°C to +85°C.
General Description
Applications
®
, and
o 700MHz to 1000MHz RF Frequency Range
o 570MHz to 865MHz LO Frequency Range
o 50MHz to 250MHz IF Frequency Range
o 6dB Typical Conversion Gain
o 10.5dB Typical Noise Figure
o +28.5dBm Typical Input IP3
o +16.2dBm Typical Input 1dB Compression Point
o 77dBc Typical 2RF-2LO Spurious Rejection at
o Dual Channels Ideal for Diversity Receiver
o 47dB Typical Channel-to-Channel Isolation
o -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 43dB LO1-to-LO2
o Pin-Compatible with MAX9995/MAX9995A
o Lead-Free Package Available
* EP = Exposed paddle.
T = Tape-and-reel package.
+ Denotes lead-free and RoHS compliant.
MAX9985ETX
MAX9985ETX-T
MAX9985ETX+
MAX9985ETX+T
P
Applications
Inputs
Isolation and 50ns Switching Time
1700MHz to 2200MHz Mixers
RF
PART
= -10dBm
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Ordering Information
PIN-PACKAGE
36 Thi n QFN- E P *
36 Thi n QFN- E P *
36 Thi n QFN- E P *
36 Thi n QFN- E P *
(6mm x 6mm),
(6mm x 6mm),
(6mm x 6mm),
lead free, bulk
(6mm x 6mm)
lead free, T/R
T/R
Features
T3666-2
T3666-2
T3666-2
T3666-2
CODE
PKG
1

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max9985etxt Summary of contents

Page 1

Rev 0; 1/07 Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch General Description The MAX9985 high-linearity, dual-channel downconver- sion mixer is designed to provide approximately 6dB gain, +28.5dBm of IIP3, and 10.5dB of noise figure (NF) ...

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 ..........................+20dBm ...

Page 3

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch AC ELECTRICAL CHARACTERISTICS (continued) (Using the Typical Application Circuit , -5dBm 820MHz to 920MHz 5.0V -5dBm, P ...

Page 4

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch AC ELECTRICAL CHARACTERISTICS (continued) (Using the Typical Application Circuit , -5dBm 820MHz to 920MHz 5.0V -5dBm, P ...

Page 5

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch (Using the Typical Application Circuit , V wise noted.) CONVERSION GAIN vs. RF FREQUENCY -30° +85° +25°C C ...

Page 6

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch (Using the Typical Application Circuit , V wise noted.) 2RF-2LO RESPONSE vs. RF FREQUENCY +85° -5dBm -30°C C ...

Page 7

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch (Using the Typical Application Circuit , V wise noted.) CHANNEL ISOLATION vs. RF FREQUENCY -30°C, +25°C, +85° 700 800 ...

Page 8

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch (Using the Typical Application Circuit , V wise noted.) LO LEAKAGE AT RF PORT vs. LO FREQUENCY -20 - +25° -30° -40 T ...

Page 9

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

Page 10

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

Page 11

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch PIN NAME 1 RFMAIN Main Channel RF input. Internally matched to 50Ω. Requires an input DC-blocking capacitor. 2 TAPMAIN Main Channel Balun Center Tap. Bypass to GND with capacitors ...

Page 12

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch Detailed Description The MAX9985 is a dual-channel downconverter designed to provide 6dB of conversion gain, +28.5dBm input IP3, and +16.2dBm 1dB input compression point, with a 10.5dB NF. In ...

Page 13

Dual, SiGe, High-Linearity, 700MHz to 1000MHz Downconversion Mixer with LO Buffer/Switch LO Buffer Bias Resistors Bias currents for the two on-chip LO buffers is opti- mized by fine-tuning the off-chip resistors on LODBIAS (pin 17) and LOMBIAS (pin 29). The ...

Page 14

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 15

... CARDENAS Pin Configuration/Functional Diagram MAX9985 EXPOSED 8 PADDLE THIN QFN 6mm x 6mm is a registered trademark of Maxim Integrated Products, Inc LO2 26 GND 25 GND GND 24 23 LOSEL 22 GND GND 19 LO1 17 18 ...

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