MAXIM MAX2657, MAX2658 Technical data

General Description

The MAX2657/MAX2658 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 an ultra-low-noise figure while maximizing the
input-referred 1dB compression point and the 3rd-order
intercept point.

The MAX2657/MAX2658 operate from a +1.6V to +3.3V
single supply. The MAX2657 is optimized for low current.
The MAX2658 is optimized for high linearity. The shut­down feature in the device reduces the supply current to
be less than 1µA. The MAX2657/MAX2658 are available
in a very small, lead-free, RoHS-compliant, 0.86mm x

1.26mm x 0.65mm, wafer-level package (WLP).

Applications

Automotive Navigation

Location-Enabled Mobile Devices

Telematics (Asset Tracking and Management)

Personal Navigation Devices (PNDs)

Cellular Phones with GPS

Notebook PCs/Ultra-Mobile PCs

Recreational, Marine Navigation

Avionics

Watches

Features

♦ High-Power Gain: 19dB (MAX2657)

♦ Ultra-Low-Noise Figure: 0.8dB

♦ Integrated 50Ω Output Matching Circuit

♦ Low Supply Current: 4.1mA (MAX2657)

♦ Wide Supply Voltage Range: 1.6V to 3.3V

♦ Low Bill of Materials: One Inductor, Two

Capacitors

♦ Small Footprint: 0.86mm x 1.26mm

♦ Thin Profile: 0.65mm

♦ 0.4mm-Pitch Wafer-Level Package (WLP)

MAX2657/MAX2658

GPS/GNSS Low-Noise Amplifiers

________________________________________________________________

Maxim Integrated Products

1

Pin Configuration/Typical Application Circuit

Ordering Information

19-4956; Rev 0; 9/09

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.

T = Tape and reel.

PART TEMP RANGE

PIN-PACKAGE

MAX2657EWT+T

-40°C to +85°C 6 WLP

MAX2658EWT+T

-40°C to +85°C 6 WLP

EVALUATION KIT

AVAILABLE

RF

INPUT

C1

SHDN

L1

+

RFIN

GND

L1 = 6.2nH (MAX2657)
C1 = 820pF (MAX2657)
C2 = 33nF

MAX2657

A1

B1

C1

MAX2658

BIAS

L1 = 2.7nH (MAX2658)
C1 = 1500pF (MAX2658)

RFOUT

A2

V

B2

C2

CC

GND

RF
OUTPUT

V

CC

C2

MAX2657/MAX2658

GPS/GNSS Low-Noise Amplifiers

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(MAX2657/MAX2658 EV kit. VCC= 1.6V to 3.3V, TA= -40°C to +85°C, no RF signals are applied. Typical values are at VCC= 2.85V
and T

A

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

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 +3.6V

Other Pins to GND .................-0.3V to (+ Operating V

CC

+ 0.3V)

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

Continuous Power Dissipation (T

A

= +70°C)

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

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

Lead Temperature (soldering, 10s)..........Reflow Profile (Note 1)

AC ELECTRICAL CHARACTERISTICS

(MAX2657/MAX2658 EV kit. VCC= 1.6V to 3.3V, TA= -40°C to +85°C, f

RFIN

= 1575.42MHz. Typical values are at VCC= 2.85V and

T

A

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

Note 1: Refer to Application Note 1891:

Wafer-Level Packaging (WLP) and Its Applications

.

CAUTION! ESD SENSITIVE DEVICE

Supply Voltage 1.6 2.85 3.3 V

Supply Current

Digital Input Logic-High 1.2 V

Digital Input Logic-Low 0.45 V

Digital Input Current 1µA

PARAMETER CONDITIONS MIN TYP MAX UNITS

SHDN = high

Shutdown mode, SHDN = low 1 µA

MAX2657 4.1

MAX2658 7.7

RF Frequency L1 band 1575.42 MHz

Power Gain

Noise Figure

In-Band 3rd-Order Input Intercept
Point

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

PARAMETER CONDITIONS MIN TYP MAX UNITS

VCC = 2.85V

V

= 1.6V

CC

(Note 3)

(Note 4)

MAX2657 19.5

MAX2658 17.7

MAX2657 19.4

MAX2658 17.6

VCC = 1.8V 0.8

= 3.3V 0.8

V

CC

MAX2657 -3.5

MAX2658 +4.5

MAX2657 +2.5

MAX2658 +8

mA

dB

dB

dBm

dBm

MAX2657/MAX2658

GPS/GNSS Low-Noise Amplifiers

_______________________________________________________________________________________ 3

AC ELECTRICAL CHARACTERISTICS (continued)

(MAX2657/MAX2658 EV kit. VCC= 1.6V to 3.3V, TA= -40°C to +85°C, f

RFIN

= 1575.42MHz. Typical values are at VCC= 2.85V and

T

A

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

Note 2: Min and max limits guaranteed by test at TA= +85°C and guaranteed by design and characterization at TA= -40°C and

T

A

= +25°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

MAX2657 and -27dBm/tone for MAX2658.

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

(MAX2657/MAX2658 EV kit. Typical values are at VCC= 2.85V, TA= +25°C, and f

RFIN

= 1575.42MHz, unless otherwise noted.)

PARAMETER CONDITIONS MIN TYP MAX UNITS

Input 1dB Compression point (Note 5)

Input Return Loss 10 dB

Output Return Loss 15 dB

Reverse Isolation 30 dB

MAX2657 -12.5

MAX2658 -10

dBm

INPUT RETURN LOSS vs. FREQUENCY

0

-5

-10

-15

|S11| (dB)

-20

-25

-30

-35
500 2500

MAX2657

FREQUENCY (MHz)

MAX2658

200015001000

MAX2657 toc01

25

20

15

10

GAIN (dB)

5

0

-5

-10
500 2500

GAIN vs. FREQUENCY

MAX2657

MAX2658

200015001000

FREQUENCY (MHz)

REVERSE ISOLATION vs. FREQUENCY

-20

MAX2657 toc02

|S12| (dB)

-30

-40

-50

-60

-70

MAX2658

MAX2657

500 2500

FREQUENCY (MHz)

MAX2657 toc03

200015001000

MAX2657/MAX2658

GPS/GNSS Low-Noise Amplifiers

4 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(MAX2657/MAX2658 EV kit. Typical values are at VCC= 2.85V, TA= +25°C, and f

RFIN

= 1575.42MHz, unless otherwise noted.)

OUTPUT RETURN LOSS vs. FREQUENCY

0

-5
MAX2657

-10
MAX2658

|S22| (dB)

-15

-20

-25

500 2500

FREQUENCY (MHz)

200015001000

MAX2657 toc04

IIP3 (dBm)

MAX2657 OUT-OF-BAND IIP3 vs.

SUPPLY VOLTAGE AND TEMPERATURE

(TONE 1 AT 1713MHz, -25dBm;

TONE 2 AT 1851MHz, -49dBm)

3

2

+25˚C

1

IIP3 (dBm)

0

+85˚C

-40˚C

MAX2657 IN-BAND IIP3 vs.

SUPPLY VOLTAGE AND TEMPERATURE

(TWO TONES LOCATED AT 1MHz AND

2MHz OFFSET WITH -35dBm/TONE)

0

-1

-2

-3

-4

-5

-40˚C

+25˚C

+85˚C

1.6 3.2
SUPPLY VOLTAGE (V)

MAX2657 toc07

3.02.82.62.42.22.01.8

MAX2658 IN-BAND IIP3 vs.

SUPPLY VOLTAGE AND TEMPERATURE

(TWO TONES LOCATED AT 1MHz AND

2MHz OFFSET WITH -30dBm/TONE)

8

MAX2657 toc05

6

-40˚C

4

IIP3 (dBm)

2

+85˚C

0

1.6
SUPPLY VOLTAGE (V)

MAX2658 OUT-OF-BAND IIP3 vs.

SUPPLY VOLTAGE AND TEMPERATURE

(TONE 1 AT 1713MHz, -25dBm;

TONE 2 AT 1851MHz, -49dBm)

10

9

+85˚C

8

7

IIP3 (dBm)

6

-40˚C

5

+25˚C

+25˚C

3.02.82.62.42.22.01.8

MAX2657 toc08

MAX2657 toc06

3.2

-1

1.6
SUPPLY VOLTAGE (V)

3.2

3.02.82.62.42.22.01.8

4

SUPPLY VOLTAGE (V)

3.02.82.62.42.22.01.81.6 3.2

MAX2657/MAX2658

GPS/GNSS Low-Noise Amplifiers

_______________________________________________________________________________________

5

Typical Operating Characteristics (continued)

(MAX2657/MAX2658 EV kit. Typical values are at VCC= 2.85V, TA= +25°C, and f

RFIN

= 1575.42MHz, unless otherwise noted.)

MAX2657 INPUT P1dB COMPRESSION

vs. SUPPLY VOLTAGE AND TEMPERATURE

-11

-12

-13

-14

-15

INPUT P1dB (dBm)

-16

-17

-18

+85˚C

+25˚C

-40˚C

SUPPLY VOLTAGE (V)

MAX2657 toc09

3.02.82.62.42.22.01.81.6 3.2

MAX2658 INPUT P1dB COMPRESSION vs.

SUPPLY VOLTAGE AND TEMPERATURE

-9

-10

-11

-12

INPUT P1dB (dBm)

-13

-14

1.6 3.2

+85˚C

+25˚C

-40˚C

SUPPLY VOLTAGE (V)

MAX2657 toc10

3.02.82.62.42.22.01.8

MAX2657/MAX2658

GPS/GNSS Low-Noise Amplifiers

6 _______________________________________________________________________________________

Detailed Description

The MAX2657/MAX2658 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 MAX2657/MAX2658 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
input-matching 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

f

values. The MAX2657/MAX2658
integrate an on-chip 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.

Shutdown

The MAX2657/MAX2658 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.

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 VCCwith
decoupling capacitors located close to the device. For
long VCClines, it may be necessary to add decoupling
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
board where the ground is not on the component layer,
connect the GND pins to the board with multiple vias
close to the package.

Pin Description

BUMP

NAME FUNCTION

A1 SHDN Shutdown Input. A logic-low disables the device.

A2 RFOUT RF Output. RFOUT is internally matched to 50Ω and incorporates an internal DC-blocking capacitor.

B1 RFIN RF Input. Requires a DC-blocking capacitor and external matching components.

B2 V

CC

Supply Voltage. Bypass to ground with a 33nF capacitor as close as possible to the IC.

C1, C2

GND Ground. Connect to the PCB ground plane.

Table 1. MAX2657 Typical S-Parameter Values and K-Factor

FREQ.

S11 MAG

(dB)

S11

PHASE

S21 MAG

(dB)

S21

PHASE

S12 MAG

(dB)

S12

PHASE

(Degrees)

S22 MAG

(dB)

S22

PHASE

K

f

1000

-2.0 -47.7 6.0 -100.0 -47.5 -148.0 -1.0 -55.0 5.1

1100

3.8

1200

-2.2 -51.6 9.6 -107.3 -42.9 -153.5 -1.4 -65.4 3.1

1300

2.5

1400

-2.7 -58.6 14.0 -129.5 -37.0 -168.5 -3.6 -85.5 2.3

1500

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

1.8

1800

-5.2 -49.8 15.7 145.8 -33.8 121.6 -4.5 -2.4 1.6

1900

1.6

2000

-4.5 -46.7 12.7 127.3 -36.7 109.6 -1.8 -21.2 1.5

(MHz)

(Degrees)

(Degrees)

(Degrees)

-2.1 -48.6 7.4 -100.6 -45.7 -150.0 -1.0 -58.1

-2.4 -55.0 12.0 -117.2 -39.6 -160.2 -2.1 -74.1

-6.5 -61.9 16.2 -146.5 -34.1 178.5 -7.4 -100.0

-5.4 -55.3 17.1 165.5 -32.5 136.5 -9.5 10.0

-4.8 -47.3 13.9 135.2 -35.2 113.8 -2.7 -13.2

MAX2657/MAX2658

GPS/GNSS Low-Noise Amplifiers

_______________________________________________________________________________________ 7

Table 2. MAX2658 Typical S-Parameter Values and K-Factor

FREQ.

(MHz)

S11 MAG

(dB)

S11

PHASE

S21 MAG

(dB)

S21

PHASE

S12 MAG

(dB)

S12

PHASE

S22 MAG

(dB)

S22

PHASE

K

f

1000

-3.0 -57.0 10.8 -120.0 -43.0 -154.0 -1.3 -65.0 3.2

1100

3.3

1200

-3.5 -60.0 13.4 -134.6 -39.3 -160.5 -2.4 -79.6 2.8

1300

2.7

1400

-4.3 -63.3 15.9 -162.3 -35.4 -178.2 -7.3 -101.0 2.7

1500

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

2.3

1800

-5.3 -50.3 14.7 136.8 -34.2 142.5 -5.7 -2.8 2.2

1900

2.3

2000

-4.9 -46.3 12.7 123.9 -35.8 138.6 -3.0 -15.0 2.1

Table 3. MAX2657 Typical Noise Parameters (VCC= 2.85V, TA= +25°C)

FREQUENCY (MHz)

FMIN

(dB)

|Γ

OPT

||Γ

OPT

| ANGLE RN (Ω)

1550 0.68 0.44 47.7 8.39

1560 0.68 0.44 48.1 8.38

1570 0.68 0.44 48.3 8.37

1575 0.68 0.44 48.5 8.36

1580 0.68 0.44 48.6 8.36

1590 0.68 0.44 48.9 8.35

1600 0.68 0.44 49.2 8.34

Table 4. MAX2658 Typical Noise Parameters (VCC= 2.85V, TA= +25°C)

FREQUENCY (MHz)

FMIN

(dB)

|Γ

OPT

||Γ

OPT

| ANGLE RN (Ω)

1550 0.68 0.28 88.0 4.48

1560 0.68 0.28 88.4 4.48

1570 0.68 0.28 88.8 4.48

1575 0.68 0.28 89.0 4.48

1580 0.68 0.28 89.2 4.48

1590 0.69 0.28 89.6 4.47

1600 0.69 0.28 90.0 4.47

(Degrees)

-3.3 -58.2 11.6 -124.5 -42.1 -155.0 -1.6 -70.2

-3.8 -62.3 14.9 -148.0 -37.2 -168.3 -4.0 -90.0

-4.9 -62.0 16.6 -178.9 -33.9 171.0 -14.5 -100.6

-5.5 -53.7 15.8 149.3 -33.6 148.3 -9.0 3.6

-5.1 -48.0 13.4 130.0 -35.1 139.6 -4.0 -9.6

(Degrees)

(Degrees)

(Degrees)

MAX2657/MAX2658

GPS/GNSS Low-Noise Amplifiers

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.

8

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© 2009 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.

Package Information

For the latest package outline information and land patterns, go
to www.maxim-ic.com/packages

.

PACKAGE TYPE PACKAGE CODE DOCUMENT NO.

6 WLP W61B1+1

21-0217

Chip Information

PROCESS: SiGe BiCMOS