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

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Maxim Integrated Products

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

INPUT

SHDN

RFIN

GND

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

MAX2657

MAX2658

BIAS

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

RFOUT

GND

RF OUTPUT

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

= +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

+ 0.3V)

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

Continuous Power Dissipation (T

= +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

= +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

= 1.6V

(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

MAX2657 -3.5

MAX2658 +4.5

MAX2657 +2.5

MAX2658 +8

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

= +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

= +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

-5

-10

-15

|S11| (dB)

-20

-25

-30

-35 500 2500

MAX2657

FREQUENCY (MHz)

MAX2658

200015001000

MAX2657 toc01

GAIN (dB)

-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

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