Rainbow Electronics MAX2051 User Manual

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 down­stream video, video-on-demand (VOD), and cable
modem termination systems (CMTS) applications. The
MAX2051 also provides excellent suppression of spuri­ous 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 high­side LO injection applications over an IF frequency
range of 50MHz to 1000MHz.

In addition to offering excellent linearity and noise per­formance, the MAX2051 also yields a high level of com­ponent 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 cur­rent 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 TC= -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

RF

= -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

1

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.

TOP VIEW

+

RF

1

GND

2

3

GND

GND

4

5

GND

*EXPOSED PAD. CONNECT EP TO GND.

GND

GND

20 19 17 16

MAX2051

67

CC

V

LOBIAS

IF-

GND

18

EP*

910

8

CC

V

GND

TQFN

IF+

GND

V

15

CC

14

GND

GND

13

LO

12

GND

11

MAX2051

SiGe, High-Linearity, 850MHz to 1550MHz
Up/Downconversion Mixer with LO Buffer

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(

Typical Application Circuit

, VCC= +4.75V to +5.25V, no input AC signals. TC= -40°C to +85°C, unless otherwise noted. Typical val-

ues are at V

CC

= +5.0V, TC= +25°C, unless otherwise noted.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

Note 1: Based on junction temperature TJ= TC+ (θJCx VCCx ICC). This formula can be used when the temperature of the exposed

pad is known while the device is soldered down to a PCB. See the

Applications Information

section for details. The junction

temperature must not exceed +150°C.

Note 2: Junction temperature T

J

= TA+ (θJAx VCCx ICC). This formula can be used when the ambient temperature of the PCB is

known. The junction temperature must not exceed +150°C.

Note 3: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-

layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial

.

Note 4: T

C

is the temperature on the exposed pad of the package. TAis the ambient temperature of the device and PCB.

V

CC

to GND...........................................................-0.3V to +5.5V

RF, LO to GND.........................................................-0.3V to 0.3V

IF+, IF-, LOBIAS to GND ............................-0.3V to (V

CC

+ 0.3V)

RF, LO Input Power ........................................................+20dBm

RF, LO Current (RF and LO is DC shorted to GND

through balun).................................................................50mA

Continuous Power Dissipation (Note 1) ........................2100mW

θ

JA

(Notes 2, 3)..............................................................+33°C/W

θ

JC

(Note 3)........................................................................8°C/W

Operating Case Temperature Range

(Note 4) ...................................................T

C

= -40°C to +85°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

RECOMMENDED AC OPERATING CONDITIONS

Supply Voltage V

Supply Current I

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

CC

CC

Total supply current 105 130 mA

4.75 5 5.25 V

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

RF Frequency f

LO Frequency f

IF Frequency f

LO Drive Level P

RF

LO

IF

LO

(Notes 5, 6) 850 1550 MHz

(Note 5) 1200 2250 MHz

Meeting RF and LO frequency ranges; IF
matching components affect the IF
frequency range (Note 5)

50 1000 MHz

-3 +9 dBm

MAX2051

SiGe, High-Linearity, 850MHz to 1550MHz

Up/Downconversion Mixer with LO Buffer

_______________________________________________________________________________________ 3

AC ELECTRICAL CHARACTERISTICS (DOWNCONVERTER OPERATION)

(

Typical Application Circuit

, VCC= +4.75V to +5.25V, RF and LO ports are driven from 50Ω sources, PLO= -3dBm to +3dBm,

P

RF

= 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 V

CC

= +5.0V, PRF= 0dBm, PLO= 0dBm, fRF=1200MHz, fLO= 1700MHz, fIF= 500MHz, TC=+25°C, unless oth-

erwise noted.) (Note 7)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Conversion Power Loss L

Conversion Power Loss
Temperature Coefficient

Conversion Power Loss Variation
vs. Frequency

Noise Figure NF

Input 1dB Compression Point IP

Third-Order Input Intercept Point IIP3

2RF-LO Spurious Rejection 2 x 1

2LO-2RF Spurious Rejection 2 X 2

TC

ΔL

C

SSB

1dB

fRF = 1200MHz, fLO = 1700MHz,
f

= 500MHz, TC = +25°C (Notes 8, 9)

IF

TC = -40°C to +85°C 0.01 dB/°C

L

fLO = 1200MHz to 2250MHz ± 0.5 dB

C

Single sideband 7.8 dB

V

= + 5.0V ,

C C

f

= 1200M H z,

R F1

= 1201M H z,

f

R F2

P

= 0d Bm tone,

R F

= 1562M H z, P LO = 0d Bm , TC = +25°C,

f

LO

f

= 362M H z ( N otes 8, 9)

IF

Single tone, fRF =1200MHz,
f

= 192.5MHz to 857.5MHz,

IF

= 1392.5MHz to 2057.5MHz,

f

LO

P

= +3dBm, resultant

LO

= 1007.5MHz to 342.5MHz

f

SPUR

(Notes 8, 9, 10)

Single tone, f

= 857.5MHz to 1000MHz,

f

IF

f

= 2057.5MHz to 2200MHz,

LO

= +3dBm, resultant

P

LO

f

= 342.5MHz to 200MHz

SPUR

=1200MHz,

RF

(Notes 8, 9, 10)

Single tone, fRF =1200MHz,

= 97.5MHz to 430MHz,

f

IF

f

= 1297.5MHz to 1630MHz,

LO

= +3dBm, resultant

P

LO

f

= 195MHz to 860MHz

SPUR

(Notes 8, 9, 10)

Single tone, f
f

= 430MHz to 525MHz,

IF

= 1630MHz to 1725MHz,

f

LO

P

= +3dBm, resultant

LO

= 860MHz to 1050MHz

f

SPUR

=1200MHz,

RF

(Notes 8, 9, 10)

PRF =

-14dBm

PRF =

-10dBm

P

=

RF

0dBm

PRF =

-14dBm

PRF =

-10dBm

P

=

RF

0dBm

PRF =

-14dBm

PRF =

-10dBm

=

P

RF

0dBm

PRF =

-14dBm

PRF =

-10dBm

P

=

RF

0dBm

33 35 dBm

73 88

69 84

59 74

74 78

70 74

60 64

68 79

64 75

54 65

71.5 77.4

67.5 73.4

57.5 63.4

7.4 9 dB

24 dBm

dBc

dBc

MAX2051

SiGe, High-Linearity, 850MHz to 1550MHz
Up/Downconversion Mixer with LO Buffer

4 _______________________________________________________________________________________

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,

P

RF

= 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 V

CC

= +5.0V, PRF= 0dBm, PLO= 0dBm, fRF=1200MHz, fLO= 1700MHz, fIF= 500MHz, TC=+25°C, unless oth-

erwise noted.) (Note 7)

3LO-3RF Spurious Rejection 3 x 3

LO Leakage at RF Port PLO = +3dBm (Notes 6, 8) -33.5 -27.5 dBm

LO Leakage at IF Port PLO = +3dBm (Notes 8, 9) -26.3 -22.9 dBm

RF-to-IF Isolation f

RF Input Impedance Z

RF Input Return Loss

LO Input Impedance Z

LO Input Return Loss

IF Output Impedance Z

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Single tone, f
50MHz < f
1250MHz < f
(Notes 8, 9)

= 1200M H z, P

R F

RF

LO on and IF terminated with a matched
impedance

LO

RF and IF terminated with a matched
impedance (Note 11)

Nominal differential impedance at the IC’s

IF

IF outputs

= 1200MHz,

RF

< 1000MHz,

IF

< 2200MHz

LO

L O

= + 3d Bm ( N otes 8, 9) 24 51 dB

PRF =

-14dBm

PRF =

-10dBm

P

= 0dBm 59.5 73

RF

87.5 101

79.5 93

50 Ω

12 dB

50 Ω

11 dB

50 Ω

dBc

IF Output Return Loss

RF ter m i nated i nto 50Ω , LO d r i ven b y 50Ω
sour ce, IF tr ansfor m ed to 50Ω si ng l e- end ed
usi ng exter nal com p onents show n i n the

Typ i cal Ap p l i cati on C i r cui t

15 dB

MAX2051

SiGe, High-Linearity, 850MHz to 1550MHz

Up/Downconversion Mixer with LO Buffer

_______________________________________________________________________________________ 5

AC ELECTRICAL CHARACTERISTICS (UPCONVERTER OPERATION)

(

Typical Application Circuit

, RF and LO ports are driven from 50Ω sources, fRF< fLO. Typical values are at VCC= +5.0V, PIF= 0dBm,

P

LO

= 0dBm, fRF= 1250MHz, fLO= 1600MHz fIF= 350MHz, TC=+25°C, unless otherwise noted.) (Note 7)

Note 5: Operation outside this range is possible, but with degraded performance of some parameters. See the

Typical Operating

Characteristics

section.

Note 6: Not production tested.
Note 7: All values reflect losses of external components, including a 0.6dB loss at f

IF

= 350MHz and a 0.8dB loss at

f

IF

= 1000MHz due to the 1:1 transformer. Output measurements were taken at IF outputs of the

Typical Application Circuit

.

Note 8: Guaranteed by design and characterization.
Note 9: 100% production tested for functionality.
Note 10: Additional improvements (of up to 4dB to 6dB) in spurious responses can be made by increasing the LO drive to +6dBm.
Note 11: The LO return loss can be improved by tuning C9 to offset any parasitics within the specific application circuit. Typical

range of C9 is 10pF to 50pF.

Conversion Power Loss L

Third-Order Input Intercept
Point

LO-2IF Spurious Rejection 61 dBc

LO+2IF Spurious Rejection 63.3 dBc

LO-3IF Spurious Rejection 78 dBc

LO+3IF Spurious Rejection 79 dBc

LO Leakage at RF Port PLO = +3dBm -35.7 dBm

IF Leakage at RF Port -52 dBm

RF Return Loss 12.3 dB

IF Input Return Loss fLO = 1200MHz 18 dB

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

7.5 dB

C

IIP3 f

= 350M H z, f

IF1

= 351M H z, P IF = 0d Bm /tone 33.4 dBm

IF2