_______________________________________________________________ Maxim Integrated Products 1

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.

SiGe, High-Linearity, 2300MHz to 4000MHz

Downconversion Mixer with LO Buffer

19-4827; Rev 0; 10/09

+Denotes a lead(Pb)-free/RoHS-compliant package.

*EP = Exposed pad.

T = Tape and reel.

General Description

The MAX19998 single, high-linearity downconversion

mixer provides 8.7dB of conversion gain, +24.3dBm

input IP3, +11.3dBm 1dB input compression point,

and a noise figure of 9.7dB for 2300MHz to 4000MHz

WiMAXK, LTE, and MMDS receiver applications. With

an ultra-wide LO 2600MHz to 4300MHz frequency

range, the MAX19998 can be used in either low-side

or high-side LO injection architectures for virtually all

2.5GHz and 3.5GHz applications. For a 2.5GHz vari-

ant tuned specifically for high-side injection, refer to the

MAX19996A.

In addition to offering excellent linearity and noise per-

formance, the MAX19998 also yields a high level of

component 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 MAX19998 requires

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

The MAX19998 is pin compatible with the MAX19996/

MAX19996A 2000MHz to 3900MHz mixer family. The

device is also pin similar with the MAX9984/MAX9986/

MAX9986A 400MHz to 1000MHz mixers and the

MAX9993/MAX9994/MAX9996 1700MHz to 2200MHz

mixers, making this entire family of downconverters ideal

for applications where a common PCB layout is used for

multiple frequency bands.

The MAX19998 is available in a compact, 5mm x 5mm,

20-pin thin QFN with an exposed pad. Electrical perfor-

mance is guaranteed over the extended -40NC to +85NC

temperature range.

Applications

2.5GHz WiMAX and LTE Base Stations

2.7GHz MMDS Base Stations

3.5GHz WiMAX and LTE Base Stations

Fixed Broadband Wireless Access

Wireless Local Loop

Private Mobile Radios

Military Systems

Features

S

2300MHz to 4000MHz RF Frequency Range

S

2600MHz to 4300MHz LO Frequency Range

S

50MHz to 500MHz IF Frequency Range

S

8.7dB Conversion Gain

S

9.7dB Noise Figure

S

+24.3dBm Typical Input IP3

S

+11.3dBm Typical Input 1dB Compression Point

S

67dBc Typical 2RF - 2LO Spurious Rejection at

S

Integrated LO Buffer

S

Integrated RF and LO Baluns for Single-Ended

Inputs

S

Low -3dBm to +3dBm LO Drive

S

Pin Compatible with the MAX19996/MAX19996A

2000MHz to 3900MHz Mixers

S

Pin Similar with the MAX9984/MAX9986/

MAX9986A Series of 400MHz to 1000MHz Mixers

and the MAX9993/MAX9994/MAX9996 Series of

1700MHz to 2200MHz Mixers

S

Single 5.0V or 3.3V Supply

S

External Current-Setting Resistors Provide Option

for Operating Device in Reduced-Power/Reduced-

Performance Mode

WiMAX is a trademark of WiMAX Forum.

Ordering Information

EVALUATION

KIT

AVAILABLE

PART

TEMP RANGE

PIN-PACKAGE

MAX19998ETP+

-40NC to +85NC

20 Thin QFN-EP*

MAX19998ETP+T

-40NC to +85NC

20 Thin QFN-EP*