MAX9981ETX+ Maxim Integrated Products, MAX9981ETX+ Datasheet

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MAX9981ETX+

Manufacturer Part Number
MAX9981ETX+
Description
Up-Down Converters IC MIXER DUAL SIGE al SiGe High-Lineari
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX9981ETX+

Maximum Input Frequency
915 MHz
Maximum Power Dissipation
2200 mW
Mounting Style
SMD/SMT
Maximum Operating Frequency
170 MHz
Maximum Power Gain
2.7 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 MAX9981 dual high-linearity mixer integrates a local
oscillator (LO) switch, LO buffer, LO splitter, and two
active mixers. On-chip baluns allow for single-ended RF
and LO inputs. The active mixers eliminate the need for
an additional IF amplifier because the mixer provides a
typical overall conversion gain of 2.1dB.
The MAX9981 active mixers are optimized to meet the
demanding requirements of GSM850, GSM900, and
CDMA850 base-station receivers. These mixers provide
exceptional linearity with an input IP3 of greater than
+27dBm. The integrated LO driver allows for a wide
range of LO drive levels from -5dBm to +5dBm. In addi-
tion, the built-in high-isolation switch enables rapid LO
selection of less than 250ns, as needed for GSM trans-
ceiver designs.
The MAX9981 is available in a 36-pin QFN package
(6mm
over the -40°C to +85°C extended temperature range.
19-2588; Rev 0; 9/02
cdmaOne is a trademark of CDMA Development Group.
cdma2000 is a trademark of Telecommunications Industry
Association.
iDEN is a trademark of Motorola, Inc.
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.
GSM850/GSM900 2G and 2.5G EDGE Base-
Station Receivers
Cellular cdmaOne™ and cdma2000™ Base-
Station Receivers
TDMA and Integrated Digital Enhanced Network
(iDEN)™ Base-Station Receivers
Digital and Spread-Spectrum Communication
Systems
Microwave Point-to-Point Links
825MHz to 915MHz, Dual SiGe High-Linearity
6mm) with an exposed paddle, and is specified
________________________________________________________________ Maxim Integrated Products
General Description
Applications
o +27.3dBm Input IP3
o +13.6dBm Input 1dB Compression Point
o 825MHz to 915MHz RF Frequency Range
o 70MHz to 170MHz IF Frequency Range
o 725MHz to 1085MHz LO Frequency Range
o 2.1dB Conversion Gain
o 10.8dB Noise Figure
o 42dB Channel-to-Channel Isolation
o -5dBm to +5dBm LO Drive
o +5V Single-Supply Operation
o Built-In LO Switch with 52dB LO1 to LO2 Isolation
o ESD Protection
o Integrated RF and LO Baluns for Single-Ended
*EP = Exposed paddle.
MAX9981EGX-T
TOP VIEW
MAINBIAS
Inputs
TAPMAIN
DIVBIAS
RFMAIN
TAPDIV
RFDIV
GND
GND
GND
PART
1
2
3
4
5
6
7
8
9
-40°C to +85°C 36 QFN-EP* (6mm × 6mm)
TEMP RANGE
6mm x 6mm QFN-EP
Ordering Information
Functional Diagram
Active Mixer
Pin Configuration/
PIN-PACKAGE
MAX9981
Features
27 LO2
26
25
24
23
22
21
20
19
GND
GND
GND
LOSEL
GND
V
GND
LO1
CC
1

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MAX9981ETX+ Summary of contents

Page 1

... CDMA Development Group. cdma2000 is a trademark of Telecommunications Industry Association. iDEN is a trademark of Motorola, Inc. ________________________________________________________________ Maxim Integrated Products 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. o +27.3dBm Input IP3 o +13.6dBm Input 1dB Compression Point ...

Page 2

Dual SiGe High-Linearity Active Mixer ABSOLUTE MAXIMUM RATINGS V ........................................................................-0.3V to +5.5V CC IFMAIN+, IFMAIN-, IFDIV+, IFDIV-, MAINBIAS, DIVBIAS, LOSEL..................-0. TAPMAIN, TAPDIV ..............................................................+5.5V MAINBIAS, DIVBIAS Current ................................................5mA RFMAIN, RFDIV, LO1, LO2 Input Power ........................+20dBm Stresses ...

Page 3

Dual SiGe High-Linearity AC ELECTRICAL CHARACTERISTICS (continued) (Typical Application Circuit +4.75V to +5.25V -40°C to +85°C, unless otherwise noted. Typical values are 770MHz +25°C, ...

Page 4

Dual SiGe High-Linearity Active Mixer (Typical Application Circuit 5.0V CONVERSION GAIN vs. RF FREQUENCY LOW-SIDE INJECTION 100MHz IF MAIN MIXER T = -40° +85°C ...

Page 5

Dual SiGe High-Linearity (Typical Application Circuit 5.0V RESPONSE vs. RF FREQUENCY LOW-SIDE INJECTION 100MHz IF DIVERSITY MIXER T = +85° -5dBm RF ...

Page 6

Dual SiGe High-Linearity Active Mixer (Typical Application Circuit 5.0V INPUT IP3 vs. RF FREQUENCY LOW-SIDE INJECTION 100MHz IF MAIN MIXER +85° +25°C ...

Page 7

Dual SiGe High-Linearity (Typical Application Circuit 5.0V INPUT P1dB vs. RF FREQUENCY HIGH-SIDE INJECTION 120MHz IF MAIN MIXER +85° +25° ...

Page 8

Dual SiGe High-Linearity Active Mixer (Typical Application Circuit 5.0V SWITCH ISOLATION vs. RF FREQUENCY LOW-SIDE INJECTION 56 LO OFFSET 1MHz f = 100MHz IF DIVERSITY MIXER +85° ...

Page 9

Dual SiGe High-Linearity (Typical Application Circuit 5.0V RETURN LOSS vs. RF FREQUENCY 0 MAIN MIXER -5dBm, 0dBm, +5dBm 700 800 900 1000 ...

Page 10

Dual SiGe High-Linearity Active Mixer PIN NAME Main Channel RF Input. This input is internally matched to 50Ω and is DC shorted to ground 1 RFMAIN through a balun. 2 TAPMAIN Main RF Balun Center Tap. Connect ...

Page 11

Dual SiGe High-Linearity 5. RFMAIN RF_MAIN 1 TAPMAIN 2 C11 C2 MAINBIAS 3 GND R1 4 GND 5 GND 6 R2 DIVBIAS 7 C12 C3 TAPDIV 8 RFDIV 9 RF_DIV C4 5.0V C6 ______________________________________________________________________________________ Active ...

Page 12

Dual SiGe High-Linearity Active Mixer COMPONENT VALUE C1, C4 33pF C2, C3 3.9pF C5, C6, C9, C10 100pF C7, C8 15pF C11, C12 0.033µF C13, C16, C17, C20 220pF C14, C15, C18, C19 330pF L1–L4 560nH R1, ...

Page 13

Dual SiGe High-Linearity Power Supply Bypassing Proper voltage supply bypassing is essential for high-fre- quency circuit stability. Bypass each V and TAPDIV with the capacitors shown in the typical application circuit. Place the TAPMAIN and TAPDIV bypass ...

Page 14

Dual SiGe High-Linearity Active Mixer (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) 14 ______________________________________________________________________________________ Package Information ...

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 © 2002 Maxim Integrated Products ...

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