Rainbow Electronics MAX19999 User Manual

General Description

The MAX19999 dual-channel downconverter provides

8.3dB of conversion gain, +24dBm input IP3, +11.4dBm
1dB input compression point, and a noise figure of

10.5dB for 3000MHz to 4000MHz WiMAX™ and LTE
diversity receiver applications. With an optimized LO fre­quency range of 2650MHz to 3700MHz, this mixer is
ideal for low-side LO injection architectures.

In addition to offering excellent linearity and noise per­formance, the MAX19999 also yields a high level of
component integration. This device includes two dou­ble-balanced passive mixer cores, two LO buffers, and
a pair of differential IF output amplifiers. Integrated on­chip baluns allow for single-ended RF and LO inputs.

The MAX19999 requires a nominal LO drive of 0dBm
and a typical supply current of 388mA at VCC= +5.0V
or 279mA at VCC= +3.3V.

The MAX19999 is pin compatible with the MAX19997A
1800MHz to 2900MHz mixer and pin similar with the
MAX19985/MAX19985A and MAX19995/MAX19995A
series of 700MHz to 2200MHz mixers, making this
entire family of downconverters ideal for applications
where a common PCB layout is used across multiple
frequency bands.

The MAX19999 is available in a compact 6mm x 6mm,
36-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

3.5GHz WiMAX and LTE Base Stations

Fixed Broadband Wireless Access

Microwave Links

Wireless Local Loop

Private Mobile Radios

Military Systems

Features

o 3000MHz to 4000MHz RF Frequency Range
o 2650MHz to 3700MHz LO Frequency Range
o 50MHz to 500MHz IF Frequency Range
o 8.3dB Conversion Gain
o +24dBm Input IP3
o 10.5dB Noise Figure
o +11.4dBm Input 1dB Compression Point
o 74dBc Typical 2 x 2 Spurious Rejection at

P

RF

= -10dBm

o Dual Channels Ideal for Diversity Receiver

Applications

o Integrated LO Buffer
o Integrated LO and RF Baluns for Single-Ended

Inputs

o Low -3dBm to +3dBm LO Drive
o Pin Compatible with the MAX19997A 1800MHz to

2900MHz Mixer

o Pin Similar to the MAX9995/MAX9995A and

MAX19995/MAX19995A 1700MHz to 2200MHz
Mixers and the MAX9985/MAX9985A and
MAX19985/MAX19985A 700MHz to 1000MHz
Mixers

o 39dB Channel-to-Channel Isolation
o Single +5.0V or +3.3V Supply
o External Current-Setting Resistors Provide Option

for Operating Device in Reduced-Power/Reduced­Performance Mode

MAX19999

Dual, SiGe High-Linearity, 3000MHz to

4000MHz Downconversion Mixer with LO Buffer

________________________________________________________________

Maxim Integrated Products

1

Ordering Information

19-4293; Rev 0; 10/08

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

MAX19999ETX+ -40°C to +85°C 36 Thin QFN-EP*

MAX19999ETX+T -40°C to +85°C 36 Thin QFN-EP*

WiMAX is a trademark of WiMAX Forum.

+

Denotes a lead-free/RoHS-compliant package.

*

EP = Exposed pad.

T = Tape and reel.

Pin Configuration/Functional Diagram and Typical
Application Circuit appear at end of data sheet.

MAX19999

Dual, SiGe High-Linearity, 3000MHz to
4000MHz Downconversion Mixer with LO Buffer

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

+5.0V SUPPLY DC ELECTRICAL CHARACTERISTICS

(

Typical Application Circuit

, no input RF or LO signals applied, VCC= +4.75V to +5.25V, TC= -40°C to +85°C. Typical values are at

V

CC

= +5.0V, TC= +25°C, unless otherwise noted. R1 = R4 = 750Ω, R2 = R5 = 698Ω.)

+3.3V SUPPLY DC ELECTRICAL CHARACTERISTICS

(

Typical Application Circuit

, no input RF or LO signals applied, TC= -40°C to +85°C. Typical values are at

V

CC

= +3.3V, TC= +25°C, unless otherwise noted. R1, R4 = 1.1kΩ; R2, R5 = 845Ω.) (Note 5)

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.

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

RF_, LO to GND.....................................................-0.3V to +0.3V

IFM_, IFD_, IFM_SET, IFD_SET, LO_ADJ_M,

LO_ADJ_D to GND.................................-0.3V to (V

CC

+ 0.3V)

RF_, LO Input Power ......................................................+15dBm

RF_, LO Current (RF and LO are DC shorted to GND

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

Continuous Power Dissipation (Note 1) ..............................8.7W

θ

JA

(Notes 2, 3)..............................................................+38°C/W

θ

JC

(Note 3).....................................................................7.4°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

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.

RECOMMENDED AC OPERATING CONDITIONS

Supply Voltage VCC 4.75 5 5.25 V

Supply Current ICC Total supply current 388 420 mA

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Supply Voltage V

Supply Current I

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

CC

CC

(Note 6) 3 3.3 3.6 V

Total supply current 279 mA

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, 7) 3000 4000 MHz

(Notes 5, 7) 2650 3700 MHz

Using Mini-Circuits TC4-1W-17 4:1
transformer as defined in the Typical
Application Circuit, IF matching
components affect the IF frequency range
(Notes 5, 7)

Using alternative Mini-Circuits TC4-1W-7A
4:1 transformer, IF matching components
affect the IF frequency range (Notes 5, 7)

(Note 7) -3 +3 dBm

100 500

50 250

MHz

MAX19999

Dual, SiGe High-Linearity, 3000MHz to

4000MHz Downconversion Mixer with LO Buffer

_______________________________________________________________________________________ 3

+5.0V SUPPLY AC ELECTRICAL CHARACTERISTICS

(

Typical Application Circuit

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

P

RF

= -5dBm, fRF= 3200MHz to 3900MHz, fLO= 2800MHz to 3600MHz, fIF= 350MHz, fRF> fLO, TC= -40°C to +85°C. Typical val-

ues are at V

CC

= +5.0V, PRF= -5dBm, PLO= 0dBm, fRF= 3550MHz, fLO= 3200MHz, fIF= 350MHz, TC= +25°C, unless otherwise

noted.) (Note 8)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Conversion Gain G

Conversion Gain Flatness

Gain Variation Over Temperature TC

Input Compression Point IP

Third-Order Input Intercept Point IIP3

Third-Order Input Intercept Point
Variation Over Temperature

Noise Figure NF

Noise Figure Temperature
Coefficient

Noise Figure Under Blocking
Conditions

2RF-2LO Spurious Rejection 2 x 2

3RF-3LO Spurious Rejection 3 x 3

RF Input Return Loss

LO Input Return Loss

IF Output Impedance Z

TC = +25°C (Notes 6, 9) 7.3 8.3 9.3 dB

C

f

= 3200MHz to 3900MHz, over any

TC

NF

CG

1dB

SSB

NF

IF

RF

100MHz band

fRF = 3200MHz to 3900MHz, TC = -40°C to
+85°C

(Notes 6, 9, 10) 9.8 11.4 dBm

f

- f

RF1

(Notes 6, 9)

f

RF

P

RF

(Notes 6, 9)

f

RF1

Single sideband, no blockers present
(Notes 5, 6)

Single sideband, no blockers present,
f

RF

Single sideband, no blockers present,
T

C

f

BLOC KE R

f

RF

B

V

C C

f

RF

3150MHz, f
175MHz, T

f

RF

3150MHz, f

116.67MHz, T

LO on and IF terminated into a matched
impedance

RF and IF terminated into a matched
impedance

Nominal differential impedance at the IC’s
IF outputs

= 1MHz, PRF = -5dBm per tone

RF2

= 3550MHz, f

= -5dBm per tone, TC = +25°C

- f

= 1MHz, TC = -40°C to +85°C ±0.3 dBm

RF2

= 3500MHz, TC = +25°C (Notes 5, 6)

= -40°C to +85°C

= 3700M H z, P

= 3450M H z, fLO = 3100M H z, P LO = 0d Bm,

= 5.0V, TC = + 25°C ( Notes 5, 6, 11)

= 3500MHz, fLO =

SPUR

= +25°C

C

= 3500MHz, fLO =

SPUR

RF1

= fLO +

= fLO +

= +25°C

C

- f

= 1MHz,

RF2

BLOC KE R

PRF = -10dBm,
(Notes 5, 6)

P
(Notes 6, 9)

PRF = -10dBm,
(Notes 5, 6)

P
(Notes 6, 9)

= 8d Bm,

= -5dBm,

RF

= -5dBm,

RF

21.6 24.3

22 24.3

68 74

63 69

77 86

67 76

0.15 dB

-0.01 dB/°C

10.5 13

10.5 11.5

0.018 dB/°C

21 25 dB

15.4 dB

14 dB

200 Ω

dBm

dB

dBc

dBc

MAX19999

Dual, SiGe High-Linearity, 3000MHz to
4000MHz Downconversion Mixer with LO Buffer

4 _______________________________________________________________________________________

+3.3V SUPPLY AC ELECTRICAL CHARACTERISTICS

(

Typical Application Circuit,

typical values are at VCC= +3.3V, PRF= -5dBm, PLO= 0dBm, fRF= 3550MHz, fLO= 3200MHz,

f

IF

= 350MHz, TC= +25°C, unless otherwise noted.) (Note 8)

+5.0V SUPPLY AC ELECTRICAL CHARACTERISTICS (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

= -5dBm, fRF= 3200MHz to 3900MHz, fLO= 2800MHz to 3600MHz, fIF= 350MHz, fRF> fLO, TC= -40°C to +85°C. Typical val-

ues are at V

CC

= +5.0V, PRF= -5dBm, PLO= 0dBm, fRF= 3550MHz, fLO= 3200MHz, fIF= 350MHz, TC= +25°C, unless otherwise

noted.) (Note 8)

IF Output Return Loss

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

RF-to-IF Isolation 28 dB

LO Leakage at RF Port (Notes 6, 9) -31 -24 dBm

2LO Leakage at RF Port -30 dBm

LO Leakage at IF Port -23 dBm

Channel Isolation

Conversion Gain G

Conversion Gain Flatness

Gain Variation Over Temperature TC

Input Compression Point IP

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

RF terminated into 50Ω, LO driven by a 50Ω
source, IF transformed to 50Ω using
external components shown in the Typical

Application Circuit

RFMAIN (RFDIV ) converted power
measured at IFDIV (IFMAIN), relative to
IFMAIN (IFDIV), all unused ports terminated
to 50Ω (Notes 6, 9)

C

f

= 3200MHz to 3900MHz, over any

RF

100MHz band

fRF = 3200MHz to 3900MHz, TC = -40°C to

CG

+85°C

1dB

36 39 dB

18 dB

8.0 dB

0.15 dB

-0.01 dB/°C

8.4 dBm

Third-Order Input Intercept Point IIP3 f

Third-Order Input Intercept
Variation Over Temperature

Noise Figure NF

Noise Figure Temperature
Coefficient

2RF-2LO Spurious Rejection 2 x 2 f

3RF-3LO Spurious Rejection 3 x 3 f

RF Input Return Loss

LO Input Return Loss

TC

SSB

NF

- f

RF1

f

RF1

Single sideband, no blockers present 10.5 dB

Single sideband, no blockers present,
T

C

SPUR

SPUR

LO on and IF terminated into a matched
impedance

RF and IF terminated into a matched
impedance

= 1MHz, PRF = -5dBm per tone 20.3 dBm

RF2

- f

= 1MHz, TC = -40°C to +85°C ±0.3 dBm

RF2

= -40°C to +85°C

= fLO + 175MHz

= fLO + 116.67MHz

PRF = -10dBm 74

= -5dBm 69

P

RF

PRF = -10dBm 75

= -5dBm 65

P

RF

0.018 dB/°C

16 dB

15.5 dB

dBc

dBc

MAX19999

Dual, SiGe High-Linearity, 3000MHz to

4000MHz Downconversion Mixer with LO Buffer

_______________________________________________________________________________________ 5

+3.3V SUPPLY AC ELECTRICAL CHARACTERISTICS (continued)

(

Typical Application Circuit,

typical values are at VCC= +3.3V, PRF= -5dBm, PLO= 0dBm, fRF= 3550MHz, fLO= 3200MHz,

f

IF

= 350MHz, TC= +25°C, unless otherwise noted.) (Note 8)

Note 5: Not production tested.
Note 6: Guaranteed by design and characterization.
Note 7: Operation outside this range is possible, but with degraded performance of some parameters. See the

Typical Operating

Characteristics

section.

Note 8: All limits reflect losses of external components, including a 0.9dB loss at f

IF

= 350MHz due to the 4:1 impedance trans-

former. Output measurements were taken at IF outputs of the

Typical Application Circuit

.

Note 9: 100% production tested for functional performance.
Note 10: Maximum reliable continuous input power applied to the RF or IF port of this device is +12dBm from a 50Ω source.
Note 11: Measured with external LO source noise filtered so the noise floor is -174dBm/Hz. This specification reflects the effects of

all SNR degradations in the mixer, including the LO noise as defined in Application Note 2021:

Specifications and

Measurement of Local Oscillator Noise in Integrated Circuit Base Station Mixers

.

IF Output Impedance Z

IF Output Return Loss

RF-to-IF Isolation 28 dB

LO Leakage at RF Port -36 dBm

2LO Leakage at RF Port -34 dBm

LO Leakage at IF Port -27 dBm

Channel Isolation

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Nominal differential impedance at the IC’s

IF

IF outputs

RF terminated into 50Ω, LO driven by a 50Ω
source, IF transformed to 50Ω using
external components shown in the Typical

Application Circuit

RFM AIN ( RFD IV ) conver ted p ow er
m easur ed at IFD IV ( IFM AIN ) , r el ati ve to
IFM AIN ( IFD IV ) , al l unused p or ts ter m i nated
to 50Ω

200 Ω

19 dB

38.5 dB

Typical Operating Characteristics

(

Typical Application Circuit

, VCC= +5.0V, LO is low-side injected for a 350MHz IF, PLO= 0dBm, PRF= -5dBm, TC=+25°C, unless

otherwise noted.)

MAX19999

Dual, SiGe High-Linearity, 3000MHz to
4000MHz Downconversion Mixer with LO Buffer

6 _______________________________________________________________________________________

CONVERSION GAIN vs. RF FREQUENCY

10

9

TC = +25°C

8

CONVERSION GAIN (dB)

7

6

3000 4000

RF FREQUENCY (MHz)

INPUT IP3 vs. RF FREQUENCY

27

PRF = -5dBm/TONE

26

25

24

INPUT IP3 (dBm)

23

TC = +85°C

TC = +25°C

TC = -30°C

TC = +85°C

TC = -30°C

CONVERSION GAIN vs. RF FREQUENCY

10

MAX19999 toc01

3800360034003200

9

8

CONVERSION GAIN (dB)

7

6

PLO = -3dBm, 0dBm, +3dBm

3000 4000

RF FREQUENCY (MHz)

3800360034003200

MAX19999 toc02

INPUT IP3 vs. RF FREQUENCY

27

PRF = -5dBm/TONE

MAX19999 toc04

26

25

24

INPUT IP3 (dBm)

23

PLO = -3dBm, 0dBm, +3dBm

MAX19999 toc05

CONVERSION GAIN vs. RF FREQUENCY

10

9

8

CONVERSION GAIN (dB)

7

6

3000 4000

VCC = 4.75V, 5.0V, 5.25V

RF FREQUENCY (MHz)

INPUT IP3 vs. RF FREQUENCY

27

PRF = -5dBm/TONE

26

25

24

INPUT IP3 (dBm)

23

VCC = 4.75V, 5.0V, 5.25V

MAX19999 toc03

3800360034003200

MAX19999 toc06

MAX19999 toc08

NOISE FIGURE (dB)

22

3000 4000

RF FREQUENCY (MHz)

NOISE FIGURE vs. RF FREQUENCY

13

12

11

10

VCC = 4.75V, 5.0V, 5.25V

9

8

7

3200 3375 3550 3725 3900

RF FREQUENCY (MHz)

22

3000 4000

RF FREQUENCY (MHz)

NOISE FIGURE vs. RF FREQUENCY

13

TC = +85°C

12

11

10

NOISE FIGURE (dB)

9

8

7

3200 3900

TC = +25°C

TC = -30°C

372535503375

RF FREQUENCY (MHz)

22

3800360034003200

3000 4000

RF FREQUENCY (MHz)

3800360034003200

NOISE FIGURE vs. RF FREQUENCY

13

12

MAX19999 toc07

11

10

PLO = -3dBm, 0dBm, +3dBm

9

NOISE FIGURE (dB)

8

7

3200 3375 3550 3725 3900

RF FREQUENCY (MHz)

3800360034003200

MAX19999 toc09