Rainbow Electronics MAX19995А User Manual

General Description

The MAX19995A dual-channel downconverter is designed to provide 8.7dB of conversion gain, +24.8dBm input IP3, +13.5dBm 1dB input compression point, and a noise figure of 9.2dB for 1700MHz to 2200MHz diversity receiver applications. With an optimized LO frequency range of 1750MHz to 2700MHz, this mixer is ideal for high-side LO injection architectures. Low-side LO injection is supported by the MAX19995, which is pin-pin and functionally compatible with the MAX19995A.

In addition to offering excellent linearity and noise performance, the MAX19995A also yields a high level of component integration. This device includes two doublebalanced passive mixer cores, two LO buffers, a dualinput LO selectable switch, and a pair of differential IF output amplifiers. Integrated on-chip baluns allow for single-ended RF and LO inputs. The MAX19995A requires a nominal LO drive of 0dBm and a typical supply current of 350mA at VCC= 5.0V, or 242mA at VCC= 3.3V.

The MAX19995/MAX19995A are pin compatible with the MAX19985/MAX19985A series of 700MHz to 1000MHz mixers and pin similar to 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 MAX19995A is available in a 6mm x 6mm, 36-pin thin QFN package with an exposed pad. Electrical performance is guaranteed over the extended temperature range (TC= -40°C to +85°C).

Applications

UMTS/WCDMA Base Stations

LTE/WiMAX™Base Stations

TD-SCDMA Base Stations

DCS1800/PCS1900 and GSM/EDGE Base Stations

cdma2000

Base Stations

Fixed Broadband Wireless Access

Wireless Local Loop

Private Mobile Radios

Military Systems

Features

♦ 1700MHz to 2200MHz RF Frequency Range

♦ 1750MHz to 2700MHz LO Frequency Range

♦ 50MHz to 500MHz IF Frequency Range

♦ 8.7dB Typical Conversion Gain

♦ 9.2dB Typical Noise Figure

♦ +24.8dBm Typical Input IP3

♦ +13.5dBm Typical Input 1dB Compression Point

♦ 64dBc Typical 2LO-2RF Spurious Rejection at

= -10dBm

♦ Dual Channels Ideal for Diversity Receiver

Applications

♦ 48dB 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 48dB LO-to-LO

Isolation and 50ns Switching Time

♦ Pin Compatible with the MAX19985/MAX19985A/

MAX19995 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/ReducedPerformance Mode

MAX19995A

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

Downconversion Mixer with LO Buffer/Switch

________________________________________________________________

Maxim Integrated Products

Ordering Information

19-4419; Rev 0; 1/09

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.

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

EP = Exposed pad.

T = Tape and reel.

WiMAX is a trademark of WiMAX Forum.

cdma2000 is a registered trademark of Telecommunications Industry Association.

PART TEMP RANGE PIN-PACKAGE

-40°C to +85°C 36 Thin QFN-EP*

Pin Configuration/Functional Diagram appears at end of data sheet.

MAX19995AETX+

MAX19995AETX+T

MAX19995A

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

Downconversion Mixer with LO Buffer/Switch

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

5.0V SUPPLY DC ELECTRICAL CHARACTERISTICS

(

Typical Application Circuit

, VCC= 4.75V to 5.25V, no input AC signals. TC= -40°C to +85°C, R1 = R4 = 681Ω, R2 = R5 = 1.5kΩ.

Typical values are at V

= 5.0V, TC= +25°C, unless otherwise noted. All parameters are production tested.)

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

= 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

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

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

LO1, LO2 to GND ..................................................-0.3V to +0.3V

LOSEL to GND ...........................................-0.3V to (V

+ 0.3V)

RFMAIN, RFDIV, and LO_ Input Power ..........................+15dBm

RFMAIN, RFDIV Current (RF is DC shorted to GND

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

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

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

(Notes 1, 3)...............................................................7.4°C/W

Operating Case Temperature Range (Note 4) ....-40°C to +85°C

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

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

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

PARAMETER

CONDITIONS

UNITS

Supply Voltage V

Supply Current I

Total supply current, VCC = 5.0V

LOSEL Input High Voltage V

LOSEL Input Low Voltage V

0.8 V

LOSEL Input Current

-10

µA

3.3V SUPPLY DC ELECTRICAL CHARACTERISTICS

(

Typical Application Circuit

, VCC= 3.0V to 3.6V, no input AC signals. TC= -40°C to +85°C, R1 = R4 = 909Ω, R2 = R5 = 1kΩ. Typical

values are at V

= 3.3V, TC= +25°C, unless otherwise noted. Parameters are guaranteed by design and not production tested.)

PARAMETER

CONDITIONS

Supply Voltage V

3.0 3.3 3.6 V

Supply Current I

Total supply current

300 mA

LOSEL Input High Voltage V

LOSEL Input Low Voltage V

0.8 V

SYMBOL

MIN TYP MAX

4.75

350 410

5.25

IH and IIL

SYMBOL

MIN TYP MAX UNITS

242

+10

MAX19995A

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

Downconversion Mixer with LO Buffer/Switch

_______________________________________________________________________________________ 3

RECOMMENDED AC OPERATING CONDITIONS

PARAMETER

CONDITIONS

RF Frequency f

(Note 5)

LO Frequency f

(Note 5)

U si ng M i ni - C i r cui ts TC 4- 1W- 17 4:1 tr ansfor m er as d efi ned i n the Typ i cal Ap p l i cati on C i r cui t, IF m atchi ng com p onents affect the IF fr eq uency r ang e ( N ote 5)

500

IF Frequency f

U si ng al ter nati ve M i ni - C i r cui ts TC 4- 1W- 7A 4:1 tr ansfor m er as d efi ned i n the Typ i cal Ap p l i cati on C i r cui t, IF m atchi ng com p onents affect the IF fr eq uency r ang e ( N ote 5)

50 250

LO Drive Level P

-3 +3

PARAMETER

CONDITIONS

6.5 8.7

TC = +25°C (Note 7) 7.1 8.7 9.9

Conversion Gain G

TC = +25°C, fRF = 1850MHz (Note 8) 7.7 8.7 9.7

Flatness over any one of three frequency bands: f

= 1710MHz to 1785MHz

fRF = 1850MHz to 1910MHz

Conversion Gain Flatness ΔG

fRF = 1920MHz to 1980MHz

fRF = 1700MHz to 2000MHz, f

= 2050MHz to 2350MHz,

= -40°C to +85°C

Input Compression Point IP

1dBfRF

= 1850MHz (Notes 7, 9) 9.5

RF1

- f

RF2

= 1MHz, PRF = -5dBm per tone

IIP3

TC = +25°C

Input Third-Order Intercept Point Variation Over Temperature

IIP3

TC = -40°C to +85°C

Single sideband, no blockers present 9.2

Noise Figure (Note 10) NF

SSB

PLO = 0dBm, single sideband, no blockers present

9.2 9.8

Noise Figure Temperature Coefficient

Single sideband, no blockers present, T

= -40°C to +85°C

5.0V SUPPLY AC ELECTRICAL CHARACTERISTICS

(

Typical Application Circuit

, R1 = R4 = 681Ω, R2 = R5 = 1.5kΩ, VCC= 4.75V to 5.25V, RF and LO ports are driven from 50Ω sources,

= -3dBm to +3dBm, PRF= -5dBm, fRF= 1700MHz to 2000MHz, fLO= 2050MHz to 2350MHz, fIF= 350MHz, fRF< fLO, TC= -40°C

to +85°C. Typical values are at V

= 5.0V, PRF= -5dBm, PLO= 0dBm, fRF= 1850MHz, fLO= 2200MHz, fIF= 350MHz, TC= +25°C.

All parameters are guaranteed by design and characterization, unless otherwise noted.) (Note 6)

SYMBOL

MIN TYP MAX UNITS

1700 2200 MHz

1750 2700 MHz

100

SYMBOL

MIN TYP MAX UNITS

10.4

MHz

dBm

Gain Variation Over Temperature

Input Third-Order Intercept Point

- f

RF1

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

RF2

- f

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

RF2

= 1850M H z, fLO = 2200M H z, TC = + 25° C ,

21.5 24.8

+0.07

-0.03

-0.13

-0.011 dB/°C

13.5 dBm

24.8

0.006 dBm/°C

11.1

0.016 dB/°C

dBm

MAX19995A

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

Downconversion Mixer with LO Buffer/Switch

4 _______________________________________________________________________________________

PARAMETER

CONDITIONS

Noise Figure with Blocker NF

BLOCKER

= +8dBm, fRF = 1850MHz,

= 2200MHz, f

BLOCKER

= 1725MHz,

= 0dBm, VCC = 5.0V, TC = +25°C

(Notes 10, 11)

54 64

fRF = 1850MHz, f

= 2200MHz,

SPUR

= 2025MHz

= -5dBm 49 59

57 64

2LO-2RF Spur Rejection (Note 10)

2 x 2

= 1850MHz,

= 2200MHz,

SPUR

= 2025MHz,

TC = +25°C

= -5dBm 52 59

dBc

70 80

fRF = 1850MHz, f

= 2200MHz,

SPUR

= 2083.33MHz

= -5dBm 60 70

71 80

3LO-3RF Spur Rejection (Note 10)

3 x 3

= 1850MHz,

= 2200MHz,

SPUR

= 2083.33MHz,

TC = +25°C

= -5dBm 61 70

dBc

RF Input Return Loss

LO and IF terminated into matched impedance, LO on

21 dB

LO port selected, RF and IF terminated into matched impedance

LO Input Return Loss

LO port unselected, RF and IF terminated into matched impedance

IF Output Impedance Z

Nominal differential impedance of the IF outputs

IF Output Return Loss

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

Application Circuit

RF-to-IF Isolation (Note 8) 31 35 dB

LO Leakage at RF Port (Note 8) -35 -25

2LO Leakage at RF Port (Note 8)

-14

LO Leakage at IF Port (Note 8) -32 -22

5.0V SUPPLY AC ELECTRICAL CHARACTERISTICS (continued)

(

Typical Application Circuit

, R1 = R4 = 681Ω, R2 = R5 = 1.5kΩ, VCC= 4.75V to 5.25V, RF and LO ports are driven from 50Ω sources,

= -3dBm to +3dBm, PRF= -5dBm, fRF= 1700MHz to 2000MHz, fLO= 2050MHz to 2350MHz, fIF= 350MHz, fRF< fLO, TC= -40°C

to +85°C. Typical values are at V

= 5.0V, PRF= -5dBm, PLO= 0dBm, fRF= 1850MHz, fLO= 2200MHz, fIF= 350MHz, TC= +25°C.

All parameters are guaranteed by design and characterization, unless otherwise noted.) (Note 6)

SYMBOL

MIN TYP MAX UNITS

19.7 23.4

= 0dBm, VCC = 5.0V,

PRF = -10dBm

200

11.5

-17.5

dBm

MAX19995A

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

Downconversion Mixer with LO Buffer/Switch

_______________________________________________________________________________________ 5

3.3V SUPPLY AC ELECTRICAL CHARACTERISTICS

(

Typical Application Circuit

, R1 = R4 = 909Ω, R2 = R5 = 1kΩ. Typical values are at VCC= 3.3V, PRF= -5dBm, PLO= 0dBm,

= 1850MHz, fLO= 2200MHz, fIF= 350MHz, TC= +25°C, unless otherwise noted.) (Note 6)

PARAMETER

CONDITIONS

Conversion Gain G

(Note 8) 8.4 dB

Flatness over any one of three frequency bands: f

= 1710MHz to 1785MHz

fRF = 1850MHz to 1910MHz

Conversion Gain Flatness ΔG

fRF = 1920MHz to 1980MHz

TC = -40°C to +85°C

Input Compression Point IP

1dB

(Note 9)

IIP3 f

RF1

- f

RF2

= 1MHz

Input Third-Order Intercept Point Variation Over Temperature

IIP3

TC = -40°C to +85°C

Noise Figure NF

SSB

Single sideband, no blockers present 9 dB

Noise Figure Temperature Coefficient

Single sideband, no blockers present, T

= -40°C to +85°C

PRF = -10dBm 65

2LO-2RF Spur Rejection 2 x 2

= -5dBm 60

dBc

PRF = -10dBm 77

3LO-3RF Spur Rejection 3 x 3

= -5dBm 67

dBc

RF Input Return Loss

LO and IF terminated into matched impedance, LO on

25 dB

PARAMETER

CONDITIONS

RFMAIN converted power measured at IFDIV relative to IFMAIN, all unused ports terminated to 50

40 48

Channel Isolation (Note 7)

RFDIV converted power measured at IFMAIN relative to IFDIV, all unused ports terminated to 50

40 48

LO-to-LO Isolation

LO1

= +3dBm, P

LO2

= +3dBm,

40 48 dB

LO Switching Time

50% of LOSEL to IF settled within 2 degrees

50 ns

5.0V SUPPLY AC ELECTRICAL CHARACTERISTICS (continued)

(

Typical Application Circuit

, R1 = R4 = 681Ω, R2 = R5 = 1.5kΩ, VCC= 4.75V to 5.25V, RF and LO ports are driven from 50Ω sources,

= -3dBm to +3dBm, PRF= -5dBm, fRF= 1700MHz to 2000MHz, fLO= 2050MHz to 2350MHz, fIF= 350MHz, fRF< fLO, TC= -40°C

to +85°C. Typical values are at V

= 5.0V, PRF= -5dBm, PLO= 0dBm, fRF= 1850MHz, fLO= 2200MHz, fIF= 350MHz, TC= +25°C.

All parameters are guaranteed by design and characterization, unless otherwise noted.) (Note 6)

SYMBOL

= 2200MHz, f

LO1

= 2201MHz (Note 7)

LO2

MIN TYP MAX UNITS

SYMBOL

MIN TYP MAX UNITS

Gain Variation Over Temperature

Input Third-Order Intercept Point

- f

RF1

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

RF2

+0.07

-0.03

-0.13

-0.013 dB/°C

10.2 dBm

22.5 dBm

0.0017 dBm/°C

0.016 dB/°C

MAX19995A

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

Downconversion Mixer with LO Buffer/Switch

6 _______________________________________________________________________________________

3.3V SUPPLY AC ELECTRICAL CHARACTERISTICS (continued)

(

Typical Application Circuit

, R1 = R4 = 909Ω, R2 = R5 = 1kΩ. Typical values are at VCC= 3.3V, PRF= -5dBm, PLO= 0dBm,

= 1850MHz, fLO= 2200MHz, fIF= 350MHz, TC= +25°C, unless otherwise noted.) (Note 6)

PARAMETER

CONDITIONS

LO port selected, RF and IF terminated into matched impedance

LO Input Return Loss

LO port unselected, RF and IF terminated into matched impedance

IF Output Return Loss

RF terminated into 50

Ω, LO driven by 50Ω

source, IF transformed to 50Ω using external components shown in the Typical

Application Circuit

RF-to-IF Isolation 36 dB

LO Leakage at RF Port -40

2LO Leakage at RF Port -23

LO Leakage at IF Port -37

RFMAIN converted power measured at IFDIV relative to IFMAIN, all unused ports terminated to 50

Channel Isolation

RFDIV converted power measured at IFMAIN relative to IFDIV, all unused ports terminated to 50

LO-to-LO Isolation

LO1

= +3dBm, P

LO2

= +3dBm,

LO1

= 2200MHz, f

LO2

= 2201MHz

47 dB

LO Switching Time

50 ns

Note 5: Not production tested. Operation outside this range is possible, but with degraded performance of some parameters.

See the

Typical Operating Characteristics

Note 6: All limits reflect losses of external components, including a 0.9dB loss at f

= 350MHz due to the 4:1 transformer. Output

measurements were taken at IF outputs of the

Typical Application Circuit

Note 7: 100% production tested. Note 8: 100% production tested for functionality. Note 9: Maximum reliable continuous input power applied to the RF or IF port of this device is +12dBm from a 50Ω source. Note 10: Not production tested. 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

SYMBOL

MIN TYP MAX UNITS

50% of LOSEL to IF settled within 2 degrees

11.5

dBm

MAX19995A

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

Downconversion Mixer with LO Buffer/Switch

_______________________________________________________________________________________ 7

CONVERSION GAIN vs. RF FREQUENCY

MAX19995A toc01

RF FREQUENCY (MHz)

CONVERSION GAIN (dB)

2100200019001800

1700 2200

TC = -30°C

TC = +25°C

TC = +85°C

CONVERSION GAIN vs. RF FREQUENCY

MAX19995A toc02

RF FREQUENCY (MHz)

CONVERSION GAIN (dB)

2100200019001800

1700 2200

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

CONVERSION GAIN vs. RF FREQUENCY

MAX19995A toc03

RF FREQUENCY (MHz)

CONVERSION GAIN (dB)

2100200019001800

1700 2200

VCC = 4.75V, 5.0V, 5.25V

INPUT IP3 vs. RF FREQUENCY

MAX19995A toc04

RF FREQUENCY (MHz)

INPUT IP3 (dBm)

2100200019001800

1700 2200

TC = +85°C

PRF = -5dBm/TONE

TC = +25°C

TC = -30°C

INPUT IP3 vs. RF FREQUENCY

MAX19995A toc05

RF FREQUENCY (MHz)

INPUT IP3 (dBm)

2100200019001800

1700 2200

PLO = 0dBm

PLO = -3dBm

PLO = +3dBm

PRF = -5dBm/TONE

INPUT IP3 vs. RF FREQUENCY

MAX19995A toc06

RF FREQUENCY (MHz)

INPUT IP3 (dBm)

2100200019001800

1700 2200

PRF = -5dBm/TONE

VCC = 4.75V

VCC = 5.25V

VCC = 5.0V

NOISE FIGURE vs. RF FREQUENCY

MAX19995A toc07

RF FREQUENCY (MHz)

NOISE FIGURE (dB)

2100200019001800

1700 2200

TC = -30°C

TC = +25°C

TC = +85°C

NOISE FIGURE vs. RF FREQUENCY

MAX19995A toc08

RF FREQUENCY (MHz)

NOISE FIGURE (dB)

2100200019001800

1700 2200

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

NOISE FIGURE vs. RF FREQUENCY

MAX19995A toc09

RF FREQUENCY (MHz)

NOISE FIGURE (dB)

2100200019001800

1700 2200

VCC = 4.75V, 5.0V, 5.25V

Typical Operating Characteristics

(

Typical Application Circuit

, R1 = R4 = 681Ω, R2 = R5 = 1.5kΩ, VCC= 5.0V, PRF= -5dBm, PLO= 0dBm, fRF= 1850MHz,

= 2200MHz, fIF= 350MHz, TC= +25°C, unless otherwise noted.)

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