MAX9985ETX+ Maxim Integrated Products, MAX9985ETX+ Datasheet

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MAX9985ETX+

Manufacturer Part Number
MAX9985ETX+
Description
Up-Down Converters IC MIXER DOWN CONV DUAL
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX9985ETX+

Maximum Input Frequency
1000 MHz
Maximum Power Dissipation
10800 mW
Mounting Style
SMD/SMT
Maximum Operating Frequency
250 MHz
Maximum Power Gain
7.5 dB
Operating Supply Voltage
5 V
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Package / Case
TQFN-36 EP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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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MAX9985ETX+ Summary of contents

Page 1

... Built-In SPDT LO Switch with 43dB LO1-to-LO2 Isolation and 50ns Switching Time o Pin-Compatible with MAX9995/MAX9995A Applications 1700MHz to 2200MHz Mixers o Lead-Free Package Available PART MAX9985ETX MAX9985ETX-T MAX9985ETX+ MAX9985ETX Exposed paddle Tape-and-reel package. + Denotes lead-free and RoHS compliant. Features Ordering Information PKG TEMP RANGE PIN-PACKAGE CODE 36 Thi n QFN -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 ..........................+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

... 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 ____________________ 15 © 2007 Maxim Integrated Products ...

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