MAXIM MAX2667, MAX2669 Technical data

19-5518; Rev 0; 9/10

EVALUATION KIT

AVAILABLE

GPS/GNSS Ultra-Low-Noise-Figure LNAs

General Description

The MAX2667/MAX2669 high-gain, low-noise amplifiers
(LNAs) are designed for GPS L1, Galileo, and GLONASS
applications. Designed in Maxim’s advanced SiGe pro­cess, the devices achieve a high gain and our lowest
noise figure, while maximizing the input-referred 1dB
compression point and the 3rd-order intercept point.

The devices operate from a +1.6V to +3.3V single sup­ply. The MAX2667 is optimized for low current. The
MAX2669 is optimized for high linearity. The shutdown
feature in the device reduces the supply current to be
less than 10μA. The devices are available in a very small,
lead-free, RoHS-compliant, 0.86mm x 1.26mm x 0.65mm
wafer-level package (WLP).

Features

S 19dB High-Power Gain (MAX2667)

S

Ultra-Low Noise Figure: 0.65dB

S

Integrated 50Ω Output Matching Circuit

S

Low 4.1mA Supply Current (MAX2667)

S

Wide 1.6V to 3.3V Supply Voltage Range

S

Low Bill of Materials: Two Inductors, Three

Capacitors, and One Resistor

S Small Footprint: 0.86mm x 1.26mm

S

Thin Profile: 0.65mm

S

0.4mm-Pitch Wafer-Level Package (WLP)

MAX2667/MAX2669

Applications

Automotive Navigation

Location-Enabled Mobile Devices

Telematics (Asset Tracking and Management)

Personal Navigation Devices (PNDs)

Cellular Phones with GPS

Ordering Information

PART TEMP RANGE PIN-PACKAGE

MAX2667EWT+T -40°C to +85°C 6 WLP
MAX2669EWT+T -40°C to +85°C 6 WLP

+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.

Notebook PCs/Ultra-Mobile PCs

Recreational, Marine Navigation

Avionics

Watches

Typical Application Circuit

SHDN

RF OUTPUT

C2

RF INPUT

RFIN

+

MAX2667
MAX2669

A1

BIAS

B1

RFOUT

A2

V

CC

B2

25kΩ

V

CC

C3

BIAS

L2

C1

L1

GNDAC

L2 = 100nH
C3 = 39pF

_______________________________________________________________ Maxim Integrated Products 1

C1

L1 = 6.2nH (MAX2667)
C1 = 100nF (MAX2667)
C2 = 39pF

C2

GNDDC

L1 = 3.3nH (MAX2669)
C1 = 100nF (MAX2669)

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.

GPS/GNSS Ultra-Low-Noise-Figure LNAs

ABSOLUTE MAXIMUM RATINGS

VCC to GND_ ........................................................-0.3V to +3.6V

RFOUT and BIAS to GND_ ..... -0.3V to (Operating V

Maximum RF Input Power ............................................... +5dBm

Continuous Power Dissipation (T

WLP (derates 10.5mW/°C above +70°C) ....................840mW

Note 1: Refer to Application Note 1891: Wafer-level packaging (WLP) and its applications.

CAUTION! ESD SENSITIVE DEVICE

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.

= +70°C)

A

+ 0.3V)

CC

DC ELECTRICAL CHARACTERISTICS

(MAX2667/MAX2669 EV kit. VCC = 1.6V to 3.3V, no RF signals are applied, TA = -40°C to +85°C. Typical values are at VCC = 2.85V
and T

= +25°C, unless otherwise noted.) (Note 2)

MAX2667/MAX2669

A

PARAMETER CONDITIONS MIN TYP MAX UNITS

Supply Voltage 1.6 2.85 3.3 V

Supply Current

Digital Input Logic-High T
Digital Input Logic-Low T

SHDN = high

Shutdown mode, SHDN = low

= +25°C 1.2 V

A

= +25°C 0.45 V

A

Maximum Current into RF Input .........................................10mA

Operating Temperature Range .......................... -40°C to +85°C

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

Storage Temperature Range ............................ -65°C to +160°C

Soldering Temperature (reflow) (Note 1) ........................+260°C

MAX2667 4.1
MAX2669 7.7

10

mA

FA

AC ELECTRICAL CHARACTERISTICS

(MAX2667/MAX2669 EV kit. VCC = 1.6V to 3.3V, f
T

= +25°C, unless otherwise noted.) (Note 2)

A

PARAMETER CONDITIONS MIN TYP MAX UNITS

RF Frequency L1 band 1575.42 MHz

= 2.85V

V

CC

Power Gain

V

= 1.6V

CC

Noise Figure

In-Band 3rd-Order Input
Intercept Point

Out-of-Band 3rd-Order Input
Intercept Point

Input 1dB Compression Point (Note 5)

Input Return Loss 10 dB
Output Return Loss 15 dB
Reverse Isolation 30 dB

2

(Note 3)

(Note 4)

= 1575.42MHz, TA = -40°C to +85°C. Typical values are at VCC = 2.85V and

RFIN

MAX2667 15.0 19.5
MAX2669 14.6 17.7
MAX2667 14.8 19.4
MAX2669 14.3 17.6
V

= 1.8V 0.65

CC

= 3.3V 0.65

V

CC

MAX2667 -3.5
MAX2669 +4.5
MAX2667 +2.5
MAX2669 +8
MAX2667 -12.5
MAX2669 -10

dB

dB

dBm

dBm

dBm

GPS/GNSS Ultra-Low-Noise-Figure LNAs

AC ELECTRICAL CHARACTERISTICS (continued)

(MAX2667/MAX2669 EV kit. VCC = 1.6V to 3.3V, f
T

= +25°C, unless otherwise noted.) (Note 2)

A

= 1575.42MHz, TA = -40°C to +85°C. Typical values are at VCC = 2.85V and

RFIN

MAX2667/MAX2669

Note 2: Min and max limits guaranteed by test at T

= +25°C and guaranteed by design and characterization at TA = -40°C and

A

TA = +85°C.

Note 3: Measured with the two tones located at 1MHz and 2MHz offset from the center of the GPS band with -30dBm/tone for

MAX2667 and -27dBm/tone for MAX2669.

Note 4: Measured with input tones at 1713MHz (-25dBm) and 1851MHz (-49dBm).
Note 5: Measured with a tone located at 5MHz offset from the center of the GPS band.

Typical Operating Characteristics

(MAX2667/MAX2669 EV kit. Typical values are at VCC = 2.85V, f

INPUT RETURN LOSS vs. FREQUENCY

0

-5

-10

-15

|S11| (dB)

-20

-25

-30

-35
500 2500

MAX2667

FREQUENCY (MHz)

MAX2669

200015001000

MAX2667 toc01

25

20

15

10

GAIN (dB)

5

0

-5

-10
500 2500

GAIN vs. FREQUENCY

MAX2669

= 1575.42MHz, TA = +25°C, unless otherwise noted.)

RFIN

REVERSE ISOLATION vs. FREQUENCY

MAX2667 toc02

-20

-30

-40

|S12| (dB)

-50

-60

-70

MAX2669

500 2500

FREQUENCY (MHz)

MAX2667

200015001000

FREQUENCY (MHz)

MAX2667

200015001000

MAX2667 toc03

OUTPUT RETURN LOSS vs. FREQUENCY

0

-5
MAX2667

-10
MAX2669

|S22| (dB)

-15

-20

-25

500 2500

FREQUENCY (MHz)

200015001000

MAX2667 toc04

MAX2667 IN-BAND IIP3 vs.

SUPPLY VOLTAGE AND TEMPERATURE

(TWO TONES LOCATED AT 1MHz AND

2MHz OFFSET WITH -35dBm/TONE)

0

-1

-2

IIP3 (dBm)

-3

-4

-5

-40NC

+25NC

+85NC

1.6 3.2
SUPPLY VOLTAGE (V)

MAX2669 IN-BAND IIP3 vs.

SUPPLY VOLTAGE AND TEMPERATURE

(TWO TONES LOCATED AT 1MHz AND

2MHz OFFSET WITH -30dBm/TONE)

8

MAX2667 toc05

3.02.82.62.42.22.01.8

6

-40NC

4

IIP3 (dBm)

+25NC

2

+85NC

0

1.6
SUPPLY VOLTAGE (V)

MAX2667 toc06

3.2

3.02.82.62.42.22.01.8

3

GPS/GNSS Ultra-Low-Noise-Figure LNAs

Typical Operating Characteristics (continued)

(MAX2667/MAX2669 EV kit. Typical values are at VCC = 2.85V, f

= 1575.42MHz, TA = +25°C, unless otherwise noted.)

RFIN

MAX2667 OUT-OF-BAND IIP3 vs.

SUPPLY VOLTAGE AND TEMPERATURE

(TONE 1 AT 1713MHz, -25dBm;

TONE 2 AT 1851MHz, -49dBm)

3

2

+25NC

1

IIP3 (dBm)

0

+85NC

-40NC

MAX2667/MAX2669

-1

1.6
SUPPLY VOLTAGE (V)

MAX2667 INPUT P1dB COMPRESSION

vs. SUPPLY VOLTAGE AND TEMPERATURE

-11

-12

-13

-14

-15

INPUT P1dB (dBm)

-16

-17

-18

+85NC

+25NC

-40NC

SUPPLY VOLTAGE (V)

3.02.82.62.42.22.01.8

3.02.82.62.42.22.01.81.6 3.2

3.2

MAX2667 toc07

MAX2667 toc09

MAX2669 OUT-OF-BAND IIP3 vs.

SUPPLY VOLTAGE AND TEMPERATURE

(TONE 1 AT 1713MHz, -25dBm;

TONE 2 AT 1851MHz, -49dBm)

10

9

+85NC

8

7

IIP3 (dBm)

6

5

4

-40NC

SUPPLY VOLTAGE (V)

+25NC

MAX2669 INPUT P1dB COMPRESSION vs.

SUPPLY VOLTAGE AND TEMPERATURE

-9

-10

-11

-12

INPUT P1dB (dBm)

-13

-14

1.6 3.2

+85NC

+25NC

-40NC

SUPPLY VOLTAGE (V)

MAX2667 toc08

3.02.82.62.42.22.01.81.6 3.2

MAX2667 toc10

3.02.82.62.42.22.01.8

4

GPS/GNSS Ultra-Low-Noise-Figure LNAs

Bump Configuration

TOP VIEW

BUMP SIDE DOWN

MAX2667/MAX2669

1 2

+

MAX2667/MAX2669

A

B

C GNDDC

BIAS

RFIN V

GNDAC

RFOUT/

SHDN

CC

WLP

Bump Description

BUMP NAME FUNCTION

A1 BIAS

A2

B1 RFIN

B2 V

C1 GNDAC

C2 GNDDC

RFOUT/SHDN

CC

Provides Bias for LNA Input. Connect to B1 (RFIN) through a high-value inductor (100nH),
and bypass to ground close to the pin.

RF Output and SHDN Logic Input. RFOUT is internally matched to 50I and has an internal
DC-blocking capacitor. The SHDN logic input is coupled through a 25kI resistor.

RF Input. Connect to A1 through bias choke, and connect matching network and DC­blocking capacitor.

Supply Voltage. Bypass to ground with a capacitor close to the IC.

Ground of the RF Path. Connect to the 2nd-layer PCB ground plane with a via next to the pin
pad.

Ground of Bias Circuit. Connect to the 2nd-layer PCB ground plane with a separate via from
pin C1. Sharing a ground via with pin C1 might cause stability problems.

Detailed Description

The MAX2667/MAX2669 are LNAs designed for GPS
L1, Galileo, and GLONASS applications. The devices
feature a power-shutdown control mode to eliminate the
need for an external supply switch. The devices achieve
a high gain and an ultra-low noise figure.

Input and Output Matching

The devices require an off-chip input matching. Only
an inductor in series with a DC-blocking capacitor is

needed to form the input matching circuit. The Typical
Application Circuit shows the recommended input­matching network. These values are optimized for the
best simultaneous gain, noise figure, and return loss
performance. Tables 1 and 2 list typical device S param­eters and K

values. The devices integrate an on-chip

f

output matching to 50Ω at the output, eliminating the
need for external matching components. The value of the
input coupling capacitor affects IIP3. A smaller coupling
capacitor results in lower IIP3.

5

GPS/GNSS Ultra-Low-Noise-Figure LNAs

Shutdown

The devices include a shutdown feature to turn off the
entire chip. Apply a logic-high to the SHDN pin to place
the part in the active mode, and a logic-low to place the
part in the shutdown mode.

decoupling capacitors located close to the device. For
long V

lines, it may be necessary to add decoupling

CC

capacitors. Locate these additional capacitors further
away from the device package. Proper grounding of
the GND_ pins is essential. If the PCB uses a topside
RF ground, connect it directly to the GND_ pins. For a

Applications Information

A properly designed PCB is essential to any RF micro­wave circuit. Use controlled-impedance lines on all
high-frequency inputs and outputs. Bypass V

CC

with

board where the ground is not on the component layer,
connect the GND_ pins to the board with multiple vias
close to the package.

Table 1. MAX2667 Typical Device S-Parameter Values and K-Factor

FREQ.

(MHz)

MAX2667/MAX2669

1000 -2.0 -47.7 6.0 -100.0 -47.5 -148.0 -1.0 -55.0 5.1
1100 -2.1 -48.6 7.4 -100.6 -45.7 -150.0 -1.0 -58.1 3.8
1200 -2.2 -51.6 9.6 -107.3 -42.9 -153.5 -1.4 -65.4 3.1
1300 -2.4 -55.0 12.0 -117.2 -39.6 -160.2 -2.1 -74.1 2.5
1400 -2.7 -58.6 14.0 -129.5 -37.0 -168.5 -3.6 -85.5 2.3
1500 -6.5 -61.9 16.2 -146.5 -34.1 178.5 -7.4 -100.0 2.8
1575 -4.3 -62.3 17.1 -164.2 -32.9 162.8 -15.3 -100.8 2.1
1600 -4.6 -61.6 17.3 -170.6 -32.8 156.6 -20.6 -78.9 2.0
1700 -5.4 -55.3 17.1 165.5 -32.5 136.5 -9.5 10.0 1.8
1800 -5.2 -49.8 15.7 145.8 -33.8 121.6 -4.5 -2.4 1.6
1900 -4.8 -47.3 13.9 135.2 -35.2 113.8 -2.7 -13.2 1.6
2000 -4.5 -46.7 12.7 127.3 -36.7 109.6 -1.8 -21.2 1.5

S11 MAG

(dB)

S11

PHASE

(Degrees)

S21 MAG

(dB)

S21

PHASE

(Degrees)

S12 MAG

(dB)

S12

PHASE

(Degrees)

S22 MAG

(dB)

S22

PHASE

(Degrees)

K

f

Table 2. MAX2669 Typical Device S-Parameter Values and K-Factor

FREQ.

(MHz)

1000 -3.0 -57.0 10.8 -120.0 -43.0 -154.0 -1.3 -65.0 3.2
1100 -3.3 -58.2 11.6 -124.5 -42.1 -155.0 -1.6 -70.2 3.3
1200 -3.5 -60.0 13.4 -134.6 -39.3 -160.5 -2.4 -79.6 2.8
1300 -3.8 -62.3 14.9 -148.0 -37.2 -168.3 -4.0 -90.0 2.7
1400 -4.3 -63.3 15.9 -162.3 -35.4 -178.2 -7.3 -101.0 2.7
1500 -4.9 -62.0 16.6 -178.9 -33.9 171.0 -14.5 -100.6 2.6
1575 -5.3 -59.7 16.6 168.0 -33.5 161.7 -19.6 -26.0 2.5
1600 -5.4 -58.5 16.5 163.9 -33.6 157.5 -16.7 -6.0 2.5
1700 -5.5 -53.7 15.8 149.3 -33.6 148.3 -9.0 3.6 2.3
1800 -5.3 -50.3 14.7 136.8 -34.2 142.5 -5.7 -2.8 2.2
1900 -5.1 -48.0 13.4 130.0 -35.1 139.6 -4.0 -9.6 2.3
2000 -4.9 -46.3 12.7 123.9 -35.8 138.6 -3.0 -15.0 2.1

6

S11 MAG

(dB)

S11

PHASE

(Degrees)

S21 MAG

(dB)

S21

PHASE

(Degrees)

S12 MAG

(dB)

S12

PHASE

(Degrees)

S22 MAG

(dB)

S22

PHASE

(Degrees)

K

f

GPS/GNSS Ultra-Low-Noise-Figure LNAs

Table 3. MAX2667 Typical Noise Parameters (VCC = 2.85V, TA = +25°C)

FREQUENCY (MHz) FMIN (dB) |G

1550 0.54 0.48 39.9 8.43
1560 0.55 0.48 40.2 8.42
1570 0.55 0.48 40.5 8.41
1575 0.55 0.48 40.7 8.41
1580 0.55 0.48 40.9 8.40
1590 0.55 0.48 41.2 8.39
1600 0.55 0.48 41.5 8.38

| |G

OPT

| ANGLE RN (I)

OPT

MAX2667/MAX2669

Table 4. MAX2669 Typical Noise Parameters (V

FREQUENCY (MHz) FMIN (dB) |G

1550 0.57 0.29 76.1 4.53
1560 0.57 0.29 76.6 4.53
1570 0.57 0.29 77.0 4.53
1575 0.57 0.29 77.3 4.52
1580 0.57 0.29 77.5 4.52
1590 0.57 0.29 78.0 4.52
1600 0.57 0.29 78.5 4.52

OPT

Chip Information

PROCESS: SiGe BiCMOS

= 2.85V, TA = +25°C)

CC

| |G

| ANGLE RN (I)

OPT

Package Information

For the latest package outline information and land patterns,
go to www.maxim-ic.com/packages. Note that a “+”, “#”, or
“-” in the package code indicates RoHS status only. Package
drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.

PACKAGE

TYPE

6 WLP W61B1+1

PACKAGE

CODE

OUTLINE

NO.

21-0217

LAND

PATTERN NO.

—

7

GPS/GNSS Ultra-Low-Noise-Figure LNAs

Revision History

REVISION

NUMBER

0 9/10 Initial release —

REVISION

DATE

MAX2667/MAX2669

DESCRIPTION

PAGES

CHANGED

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.
Maxim reserves the right to change the circuitry and specifications without notice at any time.

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