MAX2150ETI+T【PDF 1/15 页】IC MODULATOR I/Q WIDE 28TQFN

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19-2389; Rev 4; 6/08

Wideband I/Q Modulator with Sigma-Delta

Fractional-N Synthesizer

General Description

The MAX2150 is a complete wideband direct upconver-

sion quadrature modulator IC incorporating a 28-bit

sigma-delta fractional-N synthesizer. The device is tar-

geted for applications in the 700MHz to 2300MHz fre-

quency range.

The super-high-resolution sigma-delta fractional-N syn-

thesizer is capable of better than 50mHz resolution

when used with a 10MHz reference. Other features:

fully differential I/Q modulation inputs, an internal LO

buffer, and a 50 Ω wideband output driver amplifier.

A standard 3-wire interface is provided for synthesizer

programming and overall device configuration. An on-

chip low-noise crystal oscillator amplifier is also includ-

ed and can be configured as a buffer when an external

reference oscillator is used.

The device typically achieves 34dBc of carrier and side-

band suppression at a -1dBm output level. The wide-

band, internally matched RF output can also

be disabled while the synthesizer and 3-wire bus remain

powered up for continuous programming.

Features

? Single Voltage Supply (2.7V to 3.6V)

? 75MHz 3dB I/Q Input Bandwidth

? Wideband 50Ω RF Output: 700MHz to 2300MHz

? Ultra-Fine Frequency Resolution: 100mHz

? High Reference Frequency for Fast-Switching

Applications

? Ultra-Low Phase Noise

? Low Spurious and Reference Emissions

? -1dBm RMS Output Power

? 60dB RF Muting Control

? 34dBc Typical Carrier Suppression

? 34dBc Typical Sideband Suppression

? Software- and Hardware-Controlled Shutdown

Modes

Ordering Information

The device consumes 72mA from a single +3.0V sup-

ply and is packaged in an ultra-compact 28-pin QFN

package (5mm ? 5mm) with an exposed pad.

PART

MAX2150ETI

TEMP RANGE

-40°C to +85°C

PIN-PACKAGE

28 TQFN-EP*

Applications

MAX2150ETI+ -40°C to +85°C

*EP = Exposed paddle.

28 TQFN-EP*

Wireless Broadband

Satellite Uplink

LMDS

Wireless Base Station

+Denotes lead-free package.

Pin Configuration/

Functional Diagram

VCC_RF

I+

I-

Q+

Q-

BUFEN BUFOUT

TXEN

VCC_PA

21 LO+

20 LO-

RFOUT

N.C.

19 VCC_LO

18 VCC_D

N.C.

MAX2150

1/N

17 VCC_A

LOCK

VCC_SD

∑ Δ – MOD

PROGRAMMING

AND CONTROL

PFD

1/R

CHP

16 CHP

15 VCC_CHP

CLK

DATA

SHDN

SYNEN OSCIN VCC_XTAL

QFN

________________________________________________________________ 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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