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General Description

The MAX19996 single, high-linearity downconversion

mixer provides 8.7dB conversion gain, +24.5dBm IIP3,

and 9.6dB noise figure for 2000MHz to 3000MHz WCS,

LTE, WiMAX™, and MMDS wireless infrastructure appli-

cations. With an 1800MHz to 2550MHz LO frequency

range, this particular mixer is ideal for low-side LO

injection receiver architectures. High-side LO injection

is supported by the MAX19996A, which is pin-for-pin

and functionally compatible with the MAX19996.

In addition to offering excellent linearity and noise perfor-

mance, the MAX19996 also yields a high level of compo-

nent integration. This device includes a double-balanced

passive mixer core, an IF amplifier, and an LO buffer.

On-chip baluns are also integrated to allow for single-

ended RF and LO inputs. The MAX19996 requires a

nominal LO drive of 0dBm, and supply current is typical-

ly 230mA at V

= +5.0V or 149.5mA at V

= +3.3V.

The MAX19996 is pin compatible with the MAX19996A

2300MHz to 3900MHz mixer. The device is also pin sim-

ilar with the MAX9984/MAX9986 400MHz to 1000MHz

mixers and the MAX9993/MAX9994/MAX9996 1700MHz

to 2200MHz mixers, making this entire family of down-

converters ideal for applications where a common PCB

layout is used for multiple frequency bands.

The MAX19996 is available in a compact 5mm x 5mm,

20-pin thin QFN lead-free package with an exposed

pad. Electrical performance is guaranteed over the

extended -40°C to +85°C temperature range.

Applications

2.3GHz WCS Base Stations

2.5GHz WiMAX and LTE Base Stations

2.7GHz MMDS Base Stations

Fixed Broadband Wireless Access

Wireless Local Loop

Private Mobile Radios

Military Systems

Features

♦ 2000MHz to 3000MHz RF Frequency Range

♦ 1800MHz to 2550MHz LO Frequency Range

♦ 50MHz to 500MHz IF Frequency Range

♦ 8.7dB Typical Conversion Gain

♦ 9.6dB Typical Noise Figure

♦ +24.5dBm Typical Input IP3

♦ +11dBm Typical Input 1dB Compression Point

♦ 69dBc Typical 2RF-2LO Spurious Rejection at

= -10dBm

♦ Integrated LO Buffer

♦ Integrated RF and LO Baluns for Single-Ended

Inputs

♦ Low -3dBm to +3dBm LO Drive

♦ Pin Compatible with the MAX19996A 2300MHz to

3900MHz Mixer

♦ Pin Similar with the MAX9993/MAX9994/

MAX9996 1700MHz to 2200MHz Mixers and

MAX9984/MAX9986 400MHz to 1000MHz Mixers

♦ Single +5.0V or +3.3V Supply

♦ External Current-Setting Resistors Provide Option

for Operating Device in Reduced-Power/Reduced-

Performance Mode

MAX19996

SiGe High-Linearity, 2000MHz to 3000MHz

Downconversion Mixer with LO Buffer

________________________________________________________________

Maxim Integrated Products

Ordering Information

19-4177; Rev 0; 7/08

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.

PART TEMP RANGE PIN-PACKAGE

MAX19996ETP+ -40°C to +85°C 20 Thin QFN-EP*

MAX19996ETP+T -40°C to +85°C 20 Thin QFN-EP*

Denotes a lead-free/RoHS-compliant package.

EP = Exposed pad.

T = Tape and reel.

Pin Configuration appears at end of data sheet.

WiMAX is a trademark of WiMAX Forum.

Summary of content (19 pages)

PAGE 1
9-4177; Rev 0; 7/08 SiGe High-Linearity, 2000MHz to 3000MHz Downconversion Mixer with LO Buffer The MAX19996 single, high-linearity downconversion mixer provides 8.7dB conversion gain, +24.5dBm IIP3, and 9.6dB noise figure for 2000MHz to 3000MHz WCS, LTE, WiMAX™, and MMDS wireless infrastructure applications. With an 1800MHz to 2550MHz LO frequency range, this particular mixer is ideal for low-side LO injection receiver architectures.
PAGE 2
MAX19996 SiGe High-Linearity, 2000MHz to 3000MHz Downconversion Mixer with LO Buffer ABSOLUTE MAXIMUM RATINGS VCC to GND ...........................................................-0.3V to +5.5V IF+, IF-, LOBIAS, LO, IFBIAS, LEXT to GND ..........................................-0.3V to (VCC + 0.3V) RF, LO Input Power ........................................................+12dBm RF, LO Current (RF and LO is DC shorted to GND through a balun) ......50mA Continuous Power Dissipation (Note 1) ...............
PAGE 3
SiGe High-Linearity, 2000MHz to 3000MHz Downconversion Mixer with LO Buffer (Typical Application Circuit, VCC = +4.75V to +5.25V, RF and LO ports are driven from 50Ω sources, PLO = -3dBm to +3dBm, PRF = -5dBm, fRF = 2300MHz to 2800MHz, fLO = 2000MHz to 2500MHz, fIF = 300MHz, fRF > fLO, TC = -40°C to +85°C. Typical values are at VCC = +5.0V, PRF = -5dBm, PLO = 0dBm, fRF = 2500MHz, fLO = 2200MHz, fIF = 300MHz, TC = +25°C, all parameters are guaranteed by design and characterization, unless otherwise noted.
PAGE 4
MAX19996 SiGe High-Linearity, 2000MHz to 3000MHz Downconversion Mixer with LO Buffer +5.0V SUPPLY AC ELECTRICAL CHARACTERISTICS (continued) (Typical Application Circuit, VCC = +4.75V to +5.25V, RF and LO ports are driven from 50Ω sources, PLO = -3dBm to +3dBm, PRF = -5dBm, fRF = 2300MHz to 2800MHz, fLO = 2000MHz to 2500MHz, fIF = 300MHz, fRF > fLO, TC = -40°C to +85°C. Typical values are at VCC = +5.
PAGE 5
SiGe High-Linearity, 2000MHz to 3000MHz Downconversion Mixer with LO Buffer (Typical Application Circuit, RF and LO ports are driven from 50Ω sources, Typical values are at VCC = +3.3V, PRF = -5dBm, PLO = 0dBm, fRF = 2500MHz, fLO = 2200MHz, fIF = 300MHz, TC = +25°C, unless otherwise noted.) (Note 6) PARAMETER 3RF-3LO Spur Rejection SYMBOL 3x3 CONDITIONS PRF = -5dBm 57.9 LO on and IF terminated into a matched impedance LO Input Return Loss ZIF TYP 67.
PAGE 6
Typical Operating Characteristics (Typical Application Circuit, VCC = +5.0V, PLO = 0dBm, PRF = -5dBm, LO is low-side injected for a 300MHz IF, TC = +25°C, unless otherwise noted.) 9 8 TC = +85°C 7 9 PLO = -3dBm, 0dBm, +3dBm 8 3000 2000 INPUT IP3 vs. RF FREQUENCY TC = +25°C PRF = -5dBm/TONE 27 INPUT IP3 (dBm) 25 24 TC = -40°C 23 26 PRF = -5dBm/TONE 27 PLO = -3dBm, 0dBm, +3dBm 25 24 3000 10 9 TC = +25°C 8 VCC = 4.75V, 5.0V, 5.
PAGE 7
SiGe High-Linearity, 2000MHz to 3000MHz Downconversion Mixer with LO Buffer 65 TC = +25°C TC = -40°C 45 65 PLO = -3dBm 55 3000 3RF-3LO RESPONSE vs. RF FREQUENCY TC = -40°C 75 70 65 TC = +25°C 2400 2600 2800 RF FREQUENCY (MHz) TC = +85°C 80 2000 75 70 65 PLO = -3dBm, 0dBm, +3dBm 3000 2400 2600 2800 RF FREQUENCY (MHz) 14 13 INPUT P1dB (dBm) TC = +25°C 9 8 2400 2600 2800 RF FREQUENCY (MHz) 2200 2400 2600 2800 RF FREQUENCY (MHz) MAX19996 toc12 3000 INPUT P1dB vs.
PAGE 8
Typical Operating Characteristics (continued) (Typical Application Circuit, VCC = +5.0V, PLO = 0dBm, PRF = -5dBm, LO is low-side injected for a 300MHz IF, TC = +25°C, unless otherwise noted.) LO LEAKAGE AT IF PORT vs. LO FREQUENCY -20 TC = +85°C -30 -20 -30 -40 -40 2100 2300 2500 LO FREQUENCY (MHz) RF-TO-IF ISOLATION vs. RF FREQUENCY 50 TC = +85°C 40 30 TC = +25°C TC = -40°C 50 PLO = -3dBm, 0dBm, +3dBm 40 30 3000 70 2400 2600 2800 RF FREQUENCY (MHz) -25 -30 -35 40 30 VCC = 4.
PAGE 9
SiGe High-Linearity, 2000MHz to 3000MHz Downconversion Mixer with LO Buffer RF PORT RETURN LOSS vs. RF FREQUENCY PLO = -3dBm, 0dBm, +3dBm 30 15 20 L1, L2 = 270nH 25 MAX9996 toc30 MAX19996 toc29 L1, L2 = 120nH 10 0 LO SELECTED RETURN LOSS (dB) 20 VCC = 4.75V, 5.0V, 5.25V fLO = 2400MHz 5 IF PORT RETURN LOSS (dB) 10 LO SELECTED RETURN LOSS vs. LO FREQUENCY 0 MAX19996 toc28 RF PORT RETURN LOSS (dB) 0 IF PORT RETURN LOSS vs.
PAGE 10
Typical Operating Characteristics (continued) (Typical Application Circuit, VCC = +3.3V, PLO = 0dBm, PRF = -5dBm, LO is low-side injected for a 300MHz IF, TC = +25°C, unless otherwise noted.) 9 8 7 9 8 10 PLO = -3dBm, 0dBm, +3dBm 2400 2600 2800 RF FREQUENCY (MHz) 3000 2000 PRF = -5dBm/TONE 21 2000 3000 19 18 2200 2400 2600 2800 RF FREQUENCY (MHz) 3000 INPUT IP3 vs. RF FREQUENCY VCC = 3.
PAGE 11
SiGe High-Linearity, 2000MHz to 3000MHz Downconversion Mixer with LO Buffer 2RF-2LO RESPONSE vs. RF FREQUENCY 55 PLO = +3dBm 65 55 55 TC = -40°C PRF = -5dBm VCC = 3.3V 65 45 65 55 PLO = -3dBm, 0dBm, +3dBm 3000 2400 2600 2800 RF FREQUENCY (MHz) 7 9 7 PLO = -3dBm, 0dBm, +3dBm 6 TC = -40°C 2200 2400 2600 2800 RF FREQUENCY (MHz) 3000 2400 2600 2800 RF FREQUENCY (MHz) 10 9 VCC = 3.6V 3000 8 7 VCC = 3.3V VCC = 3.0V 6 5 5 2200 INPUT P1dB vs.
PAGE 12
Typical Operating Characteristics (continued) (Typical Application Circuit, VCC = +3.3V, PLO = 0dBm, PRF = -5dBm, LO is low-side injected for a 300MHz IF, TC = +25°C, unless otherwise noted.) LO LEAKAGE AT IF PORT vs. LO FREQUENCY LO LEAKAGE AT IF PORT vs. LO FREQUENCY TC = -40°C TC = +25°C -20 -30 VCC = 3.3V -10 PLO = -3dBm, 0dBm, +3dBm -20 -30 0 MAX19996 toc54 0 LO LEAKAGE AT IF PORT (dBm) -10 LO LEAKAGE AT IF PORT vs. LO FREQUENCY MAX19996 toc53 LO LEAKAGE AT IF PORT (dBm) VCC = 3.
PAGE 13
SiGe High-Linearity, 2000MHz to 3000MHz Downconversion Mixer with LO Buffer 5 20 PLO = -3dBm, 0dBm, +3dBm 0 L1, L2 = 120nH VCC = 3.3V PLO = +3dBm LO RETURN LOSS (dB) 15 VCC = 3.0V, 3.3V, 3.6V fLO = 2400MHz MAX19996 toc62 RF PORT RETURN LOSS (dB) 10 25 0 IF PORT RETURN LOSS (dB) VCC = 3.3V MAX19996 toc61 0 5 LO RETURN LOSS vs. LO FREQUENCY IF PORT RETURN LOSS vs. IF FREQUENCY 10 15 20 10 PLO = 0dBm 20 30 PLO = -3dBm L1, L2 = 270nH 25 MAX19996 toc63 RF PORT RETURN LOSS vs.
PAGE 14
Typical Operating Characteristics (continued) (Typical Application Circuit, VCC = +3.3V, PLO = 0dBm, PRF = -5dBm, LO is low-side injected for a 300MHz IF, TC = +25°C, unless otherwise noted.) 60 L3 = 4.7nH PRF = -5dBm VCC = 3.3V 70 L3 = 0Ω 65 60 55 L3 = 4.7nH 50 50 45 45 2000 2200 2400 2600 2800 RF FREQUENCY (MHz) 2000 3000 LO LEAKAGE AT IF PORT vs. LO FREQUENCY 2400 2600 2800 RF FREQUENCY (MHz) 3000 RF-TO-IF ISOLATION vs. RF FREQUENCY VCC = 3.3V 60 MAX19996 toc69 0 VCC = 3.
PAGE 15
SiGe High-Linearity, 2000MHz to 3000MHz Downconversion Mixer with LO Buffer PIN NAME 1, 6, 8, 14 VCC FUNCTION 2 RF 3, 4, 5, 10, 12, 13, 17 GND 7 LOBIAS 9, 15 N.C. 11 LO 16 LEXT 18, 19 IF-, IF+ Mixer Differential IF Output. Connect pullup inductors from each of these pins to VCC (see the Typical Application Circuit). 20 IFBIAS IF Amplifier Bias Control. IF bias resistor connection for the IF amplifier. Connect a 698Ω 1% resistor (230mA bias condition) from IFBIAS to GND.
PAGE 16
MAX19996 SiGe High-Linearity, 2000MHz to 3000MHz Downconversion Mixer with LO Buffer Detailed Description The MAX19996 high-linearity downconversion mixer provides 8.7dB of conversion gain and +24.5dBm of IIP3, with a typical 9.6dB noise figure. The integrated baluns and matching circuitry allow for 50Ω singleended interfaces to the RF and the LO port. The integrated LO buffer provides a high drive level to the mixer core, reducing the LO drive required at the MAX19996’s input to a -3dBm to +3dBm range.
PAGE 17
SiGe High-Linearity, 2000MHz to 3000MHz Downconversion Mixer with LO Buffer MAX19996 Table 1. Component Values DESIGNATION QTY DESCRIPTION COMPONENT SUPPLIER C1 1 8.2pF microwave capacitor (0402) Murata Electronics North America, Inc. C2, C6, C8, C11 4 0.01µF microwave capacitors (0402) Murata Electronics North America, Inc. C3, C9 0 Not installed, capacitors — C10 1 2pF microwave capacitor (0402) Murata Electronics North America, Inc.
PAGE 18
SiGe High-Linearity, 2000MHz to 3000MHz Downconversion Mixer with LO Buffer MAX19996 Typical Application Circuit C13 C15 L1 3 6 IF OUTPUT T1 2 L2 R3 1 4 C14 4:1 R1 20 C3 C2 VCC C1 RF INPUT RF 19 LEXT GND IF- +5.0V IF+ IFBIAS L3 18 17 16 15 1 MAX19996 2 14 N.C. VCC +5.0V C11 GND GND 3 13 4 12 GND GND EP C10 11 5 +5.0V C6 9 LO INPUT 10 R2 NOTE: PINS 3, 4, 5, 10, 12, 13, AND 17 ARE ALL INTERNAL LY CONNECTED TO THE EXPOSED GROUND PAD.
PAGE 19
SiGe High-Linearity, 2000MHz to 3000MHz Downconversion Mixer with LO Buffer Chip Information VCC 1 RF 2 GND 3 GND 4 IFBIAS IF+ IF- GND LEXT PROCESS: SiGe BiCMOS TOP VIEW 20 19 18 17 16 MAX19996 Package Information 15 N.C. 14 VCC 13 GND 12 GND 11 LO For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. PACKAGE TYPE PACKAGE CODE DOCUMENT NO. 20 Thin QFN-EP T2055-3 21-0140 EP 6 7 8 9 10 LOBIAS VCC N.C.