MAX19995ETX+T【PDF 1/29 页】IC DOWNCONVERTER 2CH 36TQFN

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Sheet目录471

[1页]2页 3页 4页 5页

19-4253; Rev 0; 12/08

Dual, SiGe, High-Linearity, 1700MHz to 2200MHz

Downconversion Mixer with LO Buffer/Switch

General Description

The MAX19995 dual-channel downconverter provides

9dB of conversion gain, +24.8dBm input IP3,

+13.3dBm 1dB input compression point, and a noise

figure as low as 9dB for 1700MHz to 2200MHz diversity

receiver applications. With an optimized LO frequency

range of 1400MHz to 2000MHz, this mixer is ideal for

low-side LO injection architectures. High-side LO injec-

tion is supported by the MAX19995A, which is pin-pin

and functionally compatible with the MAX19995.

In addition to offering excellent linearity and noise per-

formance, the MAX19995 also yields a high level of

component integration. This device includes two dou-

ble-balanced passive mixer cores, two LO buffers, a

dual-input LO selectable switch, and a pair of differen-

tial IF output amplifiers. Integrated on-chip baluns allow

for single-ended RF and LO inputs.

The MAX19995 requires a nominal LO drive of 0dBm

and a typical supply current of 297mA at V CC = 5.0V or

212mA at V CC = 3.3V.

The MAX19995/MAX19995A are pin compatible with

the MAX19985/MAX19985A series of 700MHz to

1000MHz mixers and pin similar with the MAX19997A/

MAX19999 series of 1800MHz to 4000MHz mixers,

making this entire family of downconverters ideal for

applications where a common PCB layout is used

across multiple frequency bands.

The MAX19995 is available in a 6mm x 6mm, 36-pin

thin QFN package with an exposed pad. Electrical per-

formance is guaranteed over the extended temperature

range, from T C = -40°C to +85°C.

Applications

UMTS/WCDMA/LTE Base Stations

cdma2000 ? Base Stations

DCS1800 and EDGE Base Stations

PCS1900 and EDGE Base Stations

Features

? 1700MHz to 2200MHz RF Frequency Range

? 1400MHz to 2000MHz LO Frequency Range

? 1750MHz to 2700MHz LO Frequency Range

(MAX19995A)

? 50MHz to 500MHz IF Frequency Range

? 9dB Typical Conversion Gain

? 9dB Typical Noise Figure

? +24.8dBm Typical Input IP3

? +13.3dBm Typical Input 1dB Compression Point

? 79dBc Typical 2RF-2LO Spurious Rejection at

P RF = -10dBm

? Dual Channels Ideal for Diversity Receiver

Applications

? 49dB Typical Channel-to-Channel Isolation

? Low -3dBm to +3dBm LO Drive

? Integrated LO Buffer

? Internal RF and LO Baluns for Single-Ended

Inputs

? Built-In SPDT LO Switch with 56dB LO-to-LO

Isolation and 50ns Switching Time

? Pin Compatible with the MAX19985/MAX19985A/

MAX19995A Series of 700MHz to 2200MHz Mixers

? Pin Similar to the MAX19997A/MAX19999 Series

of 1800MHz to 4000MHz Mixers

? Single +5.0V or +3.3V Supply

? External Current-Setting Resistors Provide Option

for Operating Device in Reduced-Power/Reduced-

Performance Mode

Ordering Information

PHS/PAS Base Stations

Fixed Broadband Wireless Access

Wireless Local Loop

PART

MAX19995ETX+

MAX19995ETX+T

TEMP RANGE

-40°C to +85°C

PIN-PACKAGE

36 Thin QFN-EP*

Private Mobile Radios

Military Systems

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

*EP = Exposed pad.

T = Tape and reel.

Pin Configuration and Typical Application Circuit appear at

end of data sheet.

cdma2000 is a registered trademark of Telecommunications Industry Association.

________________________________________________________________ Maxim Integrated Products

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.

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