Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsLinear ICsMAX2051ETP+

General Description

The MAX2051 high-linearity, up/downconversion mixer

provides +35dBm input IP3, 7.8dB noise figure (NF), and

7.4dB conversion loss for 850MHz to 1550MHz wireless

infrastructure and multicarrier cable head-end down-

stream video, video-on-demand (VOD), and cable

modem termination systems (CMTS) applications. The

MAX2051 also provides excellent suppression of spuri-

ous intermodulation products (> 77dBc at an RF level of

-14dBm), making it an ideal downconverter for DOCSIS

3.0 and Euro DOCSIS cable head-end systems. With an

LO circuit tuned to support frequencies ranging from

1200MHz to 2250MHz, the MAX2051 is ideal for high-

side LO injection applications over an IF frequency

range of 50MHz to 1000MHz.

In addition to offering excellent linearity and noise per-

formance, the MAX2051 also yields a high level of com-

ponent integration. The device integrates baluns in the

RF and LO ports, which allow for a single-ended RF

input and a single-ended LO input. The MAX2051

requires a typical LO drive of 0dBm and a supply cur-

rent guaranteed to below 130mA.

The MAX2051 is available in a compact 5mm x 5mm,

20-pin thin QFN package with an exposed pad.

Electrical performance is guaranteed over the extended

temperature range, from T

= -40°C to +85°C.

Applications

Video-on-Demand and DOCSIS-Compatible

Edge QAM Modulation

Cable Modem Termination Systems

Microwave and Fixed Broadband Wireless

Access

Microwave Links

Military Systems

Predistortion Receivers

Private Mobile Radios

Integrated Digital Enhanced Network (iDEN

)

Base Stations

WiMAX™ Base Stations and Customer Premise

Equipment

Wireless Local Loop

Features

♦ 850MHz to 1550MHz RF Frequency Range

♦ 1200MHz to 2250MHz LO Frequency Range

♦ 50MHz to 1000MHz IF Frequency Range

♦ DOCSIS 3.0 and Euro DOCSIS Compatible

♦ 7.4dB Typical Conversion Loss

♦ 7.8dB Typical Noise Figure

♦ +24dBm Typical Input 1dB Compression Point

♦ +35dBm Typical Input IP3

♦ 88dBc Typical 2RF-LO Rejection at P

= -14dBm

♦ Integrated LO Buffer

♦ Integrated RF and LO Baluns for Single-Ended Inputs

♦ Low LO Drive (0dBm Nominal)

♦ External Current-Setting Resistor Provides Option

for Operating Device in Reduced-Power/

Reduced-Performance Mode

MAX2051

SiGe, High-Linearity, 850MHz to 1550MHz

Up/Downconversion Mixer with LO Buffer

________________________________________________________________

Maxim Integrated Products

TQFN

TOP VIEW

*EXPOSED PAD. CONNECT EP TO GND.

LOBIAS

GND

IF-

IF+

GND

910

20 19 17 16

GND

EP*

MAX2051

Pin Configuration/

Functional Block Diagram

Ordering Information

19-4582; Rev 0; 4/09

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

MAX2051ETP+ -40°C to +85°C 20 Thin QFN-EP*

MAX2051ETP+T -40°C to +85°C 20 Thin QFN-EP*

DOCSIS and CableLabs are registered trademarks of Cable

Television Laboratories, Inc. (CableLabs

iDEN is a registered trademark of Motorola, Inc.

WiMAX is a trademark of WiMAX Forum.

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

EP = Exposed pad.

T = Tape and reel.

Summary of content (16 pages)

PAGE 1
9-4582; Rev 0; 4/09 SiGe, High-Linearity, 850MHz to 1550MHz Up/Downconversion Mixer with LO Buffer ♦ 7.4dB Typical Conversion Loss ♦ 7.
PAGE 2
MAX2051 SiGe, High-Linearity, 850MHz to 1550MHz Up/Downconversion Mixer with LO Buffer ABSOLUTE MAXIMUM RATINGS VCC to GND ...........................................................-0.3V to +5.5V RF, LO to GND.........................................................-0.3V to 0.3V IF+, IF-, LOBIAS to GND ............................-0.3V to (VCC + 0.3V) RF, LO Input Power ........................................................+20dBm RF, LO Current (RF and LO is DC shorted to GND through balun).............
PAGE 3
SiGe, High-Linearity, 850MHz to 1550MHz Up/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 = 0dBm, fRF = 1000MHz to 1250MHz, fLO = 1200MHz to 2250MHz, fIF = 50MHz to 1000MHz, fRF < fLO, TC = -40°C to +85°C. Typical values are at VCC = +5.0V, PRF = 0dBm, PLO = 0dBm, fRF =1200MHz, fLO = 1700MHz, fIF = 500MHz, TC = +25°C, unless otherwise noted.
PAGE 4
MAX2051 SiGe, High-Linearity, 850MHz to 1550MHz Up/Downconversion Mixer with LO Buffer AC ELECTRICAL CHARACTERISTICS (DOWNCONVERTER OPERATION) (continued) (Typical Application Circuit, VCC = +4.75V to +5.25V, RF and LO ports are driven from 50Ω sources, PLO = -3dBm to +3dBm, PRF = 0dBm, fRF = 1000MHz to 1250MHz, fLO = 1200MHz to 2250MHz, fIF = 50MHz to 1000MHz, fRF < fLO, TC = -40°C to +85°C. Typical values are at VCC = +5.
PAGE 5
SiGe, High-Linearity, 850MHz to 1550MHz Up/Downconversion Mixer with LO Buffer (Typical Application Circuit, RF and LO ports are driven from 50Ω sources, fRF < fLO. Typical values are at VCC = +5.0V, PIF = 0dBm, PLO = 0dBm, fRF = 1250MHz, fLO = 1600MHz, fIF = 350MHz, TC = +25°C, unless otherwise noted.) (Note 7) PARAMETER SYMBOL Conversion Power Loss LC Third-Order Input Intercept Point IIP3 CONDITIONS MIN TYP MAX UNITS 7.5 dB 33.
PAGE 6
Typical Operating Characteristics (Typical Application Circuit, Downconversion mode, VCC = +5.0V, PLO = 0dBm, PRF = 0dBm, fRF = 1200MHz, LO is high-side injected, TC = +25°C, unless otherwise noted.) CONVERSION LOSS vs. IF FREQUENCY (DOWNCONVERSION MODE) 8 7 TC = -40°C 8 7 PLO = -3dBm, 0dBm, +3dBm 240 430 620 810 MAX2051 toc03 VCC = 4.75V, 5.0V, 5.25V 240 430 620 810 1000 50 240 430 620 810 IF FREQUENCY (MHz) IF FREQUENCY (MHz) IF FREQUENCY (MHz) IIP3 vs.
PAGE 7
SiGe, High-Linearity, 850MHz to 1550MHz Up/Downconversion Mixer with LO Buffer TC = -40°C, +25°C, +85°C 65 55 75 PLO = +3dBm 65 55 PLO = -3dBm 45 240 430 620 55 240 430 620 810 1000 50 240 430 620 810 1000 IF FREQUENCY (MHz) IF FREQUENCY (MHz) 3LO-3RF RESPONSE vs. IF FREQUENCY (DOWNCONVERSION MODE) 3LO-3RF RESPONSE vs. IF FREQUENCY (DOWNCONVERSION MODE) 3LO-3RF RESPONSE vs.
PAGE 8
Typical Operating Characteristics (continued) (Typical Application Circuit, Downconversion mode, VCC = +5.0V, PLO = 0dBm, PRF = 0dBm, fRF = 1200MHz, LO is high-side injected, TC = +25°C, unless otherwise noted.) 50 TC = -40°C 40 TC = +25°C 30 1440 1630 1820 2010 70 60 50 PLO = -3dBm, 0dBm, +3dBm 50 40 VCC = 4.75V, 5.0V, 5.
PAGE 9
SiGe, High-Linearity, 850MHz to 1550MHz Up/Downconversion Mixer with LO Buffer SUPPLY CURRENT vs. EXPOSED PAD TEMPERATURE (TC) (DOWNCONVERSION MODE) PLO = -3dBm 10 PLO = +3dBm VCC = 5.25V 1.0pF LSB, USB 110 100 90 10 35 60 50 85 250 650 850 IF FREQUENCY (MHz) 2RF-LO vs. IF FREQUENCY (ALTERNATIVE VALUES OF C2) 2LO-2RF vs. IF FREQUENCY (ALTERNATIVE VALUES OF C2) 3LO-3RF vs. IF FREQUENCY (ALTERNATIVE VALUES OF C2) -50 -55 2LO-2RF (dBc) 1.5pF 2.0pF -75 fRF = 1200MHz 1.0pF, 1.5pF, 2.
PAGE 10
Typical Operating Characteristics (continued) (Typical Application Circuit, Upconversion mode, VCC = +5.0V, PLO = 0dBm, PIF = 0dBm, fIF = 350MHz, LO is high-side injected, TC = +25°C, unless otherwise noted.) CONVERSION LOSS vs. RF FREQUENCY (UPCONVERSION MODE) 8 7 TC = -40°C 6 8 7 PLO = -3dBm, 0dBm, +3dBm 6 990 1130 1270 1410 7 VCC = 4.75V, 5.0V, 5.
PAGE 11
SiGe, High-Linearity, 850MHz to 1550MHz Up/Downconversion Mixer with LO Buffer TC = -40°C 50 850 990 1130 1270 1410 PLO = -3dBm 50 70 VCC = 5.25V 60 VCC = 4.75V, 5.0V 50 40 850 1550 990 1130 1270 1410 850 1550 990 1130 1270 1410 1550 RF FREQUENCY (MHz) RF FREQUENCY (MHz) RF FREQUENCY (MHz) LO-3IF RESPONSE vs. RF FREQUENCY (UPCONVERSION MODE) LO-3IF RESPONSE vs. RF FREQUENCY (UPCONVERSION MODE) LO-3IF RESPONSE vs.
PAGE 12
Typical Operating Characteristics (continued) (Typical Application Circuit, Upconversion mode, VCC = +5.0V, PLO = 0dBm, PIF = 0dBm, fIF = 350MHz, LO is high-side injected, TC = +25°C, unless otherwise noted.
PAGE 13
SiGe, High-Linearity, 850MHz to 1550MHz Up/Downconversion Mixer with LO Buffer LO RETURN LOSS vs. LO FREQUENCY (UPCONVERSION MODE) IF PORT RETURN LOSS vs.
PAGE 14
MAX2051 SiGe, High-Linearity, 850MHz to 1550MHz Up/Downconversion Mixer with LO Buffer Detailed Description The MAX2051 high-linearity up/downconversion mixer provides +35dBm of IIP3, with a typical 7.8dB noise figure (NF) and 7.4dB conversion loss. The integrated baluns and matching circuitry allow for 50Ω singleended interfaces to the RF and the LO ports.
PAGE 15
SiGe, High-Linearity, 850MHz to 1550MHz Up/Downconversion Mixer with LO Buffer IIP3 linearity and spurious performance can be further optimized by modifying the capacitive loading on the IF ports. The default component value of 1.3pF for C2 (listed in Table 1) was chosen to provide the best overall IIP3 linearity response over the entire 50MHz to 1000MHz band.
PAGE 16
MAX2051 SiGe, High-Linearity, 850MHz to 1550MHz Up/Downconversion Mixer with LO Buffer Typical Application Circuit T1 IF C3 C4 + 20 19 18 C1 RF IF+ IF- GND GND GND C2 17 16 VCC EP* RF GND GND GND GND 1 15 2 14 3 13 4 12 5 11 VCC C10 GND C11 GND LO C9 LO GND C5 VCC R1 C6 10 GND 9 GND 8 VCC 7 LOBIAS VCC 6 VCC MAX2051 C7 C8 *EXPOSED PAD. CONNECT EP TO GND.