MAXIM MAX19995A Technical data

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 V

CC

= 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

P

RF

= -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

1

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*

-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

CC

= 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

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

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

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

CC

+ 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

θ

JA

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

θ

JC

(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

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

CC

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

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Supply Voltage V

Supply Current I

LOSEL Input High Voltage V

LOSEL Input Low Voltage V

LOSEL Input Current I

CC

CC

IH and IIL

Total supply current, VCC = 5.0V 350 410 mA

IH

IL

4.75 5 5.25 V

2V

0.8 V

-10 +10 µA

Supply Voltage V

Supply Current I

LOSEL Input High Voltage V

LOSEL Input Low Voltage V

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

CC

CC

Total supply current 242 300 mA

IH

IL

3.0 3.3 3.6 V

2V

0.8 V

MAX19995A

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

Downconversion Mixer with LO Buffer/Switch

_______________________________________________________________________________________ 3

RECOMMENDED AC OPERATING CONDITIONS

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,

P

LO

= -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

CC

= 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)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

RF Frequency f

LO Frequency f

IF Frequency f

LO Drive Level P

RF

LO

IF

LO

(Note 5) 1700 2200 MHz

(Note 5) 1750 2700 MHz

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)

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)

100 500

50 250

-3 +3 dBm

Conversion Gain G

Conversion Gain Flatness ΔG

Gain Variation Over Temperature TC

Input Compression Point IP

Input Third-Order Intercept Point IIP3

Input Third-Order Intercept Point
Variation Over Temperature

Noise Figure (Note 10) NF

Noise Figure Temperature
Coefficient

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

6.5 8.7 10.4

TC = +25°C (Note 7) 7.1 8.7 9.9

C

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

Flatness over any one of three frequency

TC

TC

CG

1dB

IIP3

SSB

NF

bands:
f

= 1710MHz to 1785MHz

RF

C

fRF = 1850MHz to 1910MHz -0.03

fRF = 1920MHz to 1980MHz -0.13

fRF = 1700MHz to 2000MHz,
f

= 2050MHz to 2350MHz,

LO

= -40°C to +85°C

T

C

fRF = 1850MHz (Notes 7, 9) 9.5 13.5 dBm

f

- f

RF1

f

RF1

T

C

f

RF1

T

C

Single sideband, no blockers present 9.2 11.1

f

RF

P

LO

present

Single sideband, no blockers present,
T

C

= 1MHz, PRF = -5dBm per tone 21.5 24.8

RF2

- f

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

RF2

= +25°C

- f

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

RF2

= -40°C to +85°C

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

= 0dBm, single sideband, no blockers

= -40°C to +85°C

+0.07

-0.011 dB/°C

22 24.8

0.006 dBm/°C

9.2 9.8

0.016 dB/°C

MHz

dB

dB

dBm

dB

MAX19995A

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

Downconversion Mixer with LO Buffer/Switch

4 _______________________________________________________________________________________

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,

P

LO

= -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

CC

= 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)

Noise Figure with Blocker NF

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

2LO-2RF Spur Rejection
(Note 10)

3LO-3RF Spur Rejection
(Note 10)

RF Input Return Loss

LO Input Return Loss

IF Output Impedance Z

IF Output Return Loss

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

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

2LO Leakage at RF Port (Note 8) -17.5 -14 dBm

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

2 x 2

3 x 3

IF

P

BLOCKER

f

LO

B

P

LO

(Notes 10, 11)

fRF = 1850MHz,
f

LO

f

SPUR

f

RF

f

LO

f

SPUR

P

LO

T

C

fRF = 1850MHz,
f

LO

f

SPUR

f

RF

f

LO

f

SPUR

P

LO

T

C

LO and IF terminated into matched
impedance, LO on

LO port selected, RF and IF terminated into
matched impedance

LO port unselected, RF and IF terminated
into matched impedance

Nominal differential impedance of the IF
outputs

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

Application Circuit

= +8dBm, fRF = 1850MHz,

= 2200MHz, f

= 0dBm, VCC = 5.0V, TC = +25°C

= 2200MHz,

= 2025MHz

= 1850MHz,

= 2200MHz,

= 2025MHz,

= 0dBm, VCC = 5.0V,

= +25°C

= 2200MHz,

= 2083.33MHz

= 1850MHz,

= 2200MHz,

= 2083.33MHz,

= 0dBm, VCC = 5.0V,

= +25°C

BLOCKER

= 1725MHz,

PRF = -10dBm 54 64

P

= -5dBm 49 59

RF

PRF = -10dBm 57 64

P

= -5dBm 52 59

RF

PRF = -10dBm 70 80

P

= -5dBm 60 70

RF

PRF = -10dBm 71 80

P

= -5dBm 61 70

RF

19.7 23.4 dB

21 dB

20

22

200 Ω

11.5 dB

dBc

dBc

dB

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,

f

RF

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

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,

P

LO

= -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

CC

= 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)

Channel Isolation (Note 7)

LO-to-LO Isolation

LO Switching Time

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

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

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

P

= +3dBm, P

LO1

f

= 2200MHz, f

LO1

50% of LOSEL to IF settled within
2 degrees

= +3dBm,

LO2

= 2201MHz (Note 7)

LO2

40 48

40 48

40 48 dB

50 ns

Conversion Gain G

Conversion Gain Flatness ΔG

Gain Variation Over Temperature TC

Input Compression Point IP

Input Third-Order Intercept Point IIP3 f

Input Third-Order Intercept Point
Variation Over Temperature

Noise Figure NF

Noise Figure Temperature
Coefficient

2LO-2RF Spur Rejection 2 x 2

3LO-3RF Spur Rejection 3 x 3

RF Input Return Loss

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

(Note 8) 8.4 dB

C

Flatness over any one of three frequency

TC

TC

CG

1dB

IIP3

SSB

NF

bands:

= 1710MHz to 1785MHz

f

RF

C

fRF = 1850MHz to 1910MHz -0.03

fRF = 1920MHz to 1980MHz -0.13

TC = -40°C to +85°C -0.013 dB/°C

(Note 9) 10.2 dBm

- f

RF1

f

RF1

T

C

Single sideband, no blockers present 9 dB

Single sideband, no blockers present,
T

C

PRF = -10dBm 65

P

RF

PRF = -10dBm 77

P

RF

LO and IF terminated into matched
impedance, LO on

= 1MHz 22.5 dBm

RF2

- f

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

RF2

= -40°C to +85°C

= -40°C to +85°C

= -5dBm 60

= -5dBm 67

+0.07

0.0017 dBm/°C

0.016 dB/°C

25 dB

dB

dB

dBc

dBc

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,

f

RF

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

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

IF

= 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

.

LO Input Return Loss

IF Output Return Loss

RF-to-IF Isolation 36 dB

LO Leakage at RF Port -40 dBm

2LO Leakage at RF Port -23 dBm

LO Leakage at IF Port -37 dBm

Channel Isolation

LO-to-LO Isolation

LO Switching Time 50% of LOSEL to IF settled within 2 degrees 50 ns

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

LO port selected, RF and IF terminated into
matched impedance

LO port unselected, RF and IF terminated
into matched impedance

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

Application Circuit

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

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

P

= +3dBm, P

LO1

= 2200MHz, f

f

LO1

= +3dBm,

LO2

= 2201MHz

LO2

22

16

11.5 dB

48

48

47 dB

dB

dB

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

7

8

9

10

6

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

7

8

9

10

6

1700 2200

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

CONVERSION GAIN vs. RF FREQUENCY

MAX19995A toc03

RF FREQUENCY (MHz)

CONVERSION GAIN (dB)

2100200019001800

7

8

9

10

6

1700 2200

VCC = 4.75V, 5.0V, 5.25V

INPUT IP3 vs. RF FREQUENCY

MAX19995A toc04

RF FREQUENCY (MHz)

INPUT IP3 (dBm)

2100200019001800

23

24

25

26

22

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

23

24

25

26

22

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

23

24

25

26

22

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

7

8

11

9

12

10

6

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

7

8

11

9

12

10

6

1700 2200

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

NOISE FIGURE vs. RF FREQUENCY

MAX19995A toc09

RF FREQUENCY (MHz)

NOISE FIGURE (dB)

2100200019001800

7

8

11

9

12

10

6

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,

f

LO

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

_______________________________________________________________________________________ 7