Rainbow-electronics MAX2670 Bedienungsanleitung PDF herunterladen

MAX2670

GPS/GNSS Front-End Amplifier

�� Maxim Integrated Products 1

Functional Diagram

Typical Operating Circuit appears at end of data sheet.

19-5655; Rev 0; 6/11

Ordering Information appears at end of data sheet.

For related parts and recommended products to use with this part, refer to www.maxim-ic.com/MAX2670.related.

*Without external input impedance match.

**First amplifier input is impedance matched (S

= -10dB).

Second amplifier set to high gain. Amplifiers cascaded without

interstage filter.

E V A L U A T I O N K I T A V A I L A B L E

General Description

The MAX2670 GPS/GNSS front-end amplifier IC is

designed for automotive and marine GPS/GNSS satellite

navigation antenna modules or for any application that

needs to compensate for cable losses from the antenna

to receiver. Two unconditionally stable low-noise amplifier

stages provide the high gain and integrated I/O matching

to minimize the need for external matching components

and eliminate the need for additional gain stages. The

device features the option to place a bandpass ceramic

or SAW filter between the two amplifier stages to provide

a narrow-band output to further improve the noise perfor-

mance of the GPS/GNSS receiver. Additionally, a 3.4dB

gain step is provided to compensate for cable loss varia-

tion between different applications.

The device is designed to operate across all GNSS fre-

quency standards with a 34.8dB typical cascaded gain

and a 25mA supply current. The two LNA stages allow

the use of a wide range of GNSS filter types for maxi-

mum flexibility in system design. The final RF output pin,

which drives the cable to the GNSS receiver, is also the

power-supply connection that accepts a DC supply in

the 3.0V to 5.5V range. Alternatively, the DC supply can

be applied to pin 4.

This GPS/GNSS front-end amplifier is designed on a low-

noise, advanced SiGe process and is available in a lead-

free, 10-pin TDFN surface-mount package (3mm x 3mm).

Features

S First Amplifier Noise Figure*: 1.0dB

S High Gain**: 34.8dB

S 3.4dB Gain Step

S Shared V

and RFOUT2 Pin

S Integrated 50I Output Matching

S 3.0V to 5.5V Supply Voltage Range

S Small, Low-Cost Package (3mm x 3mm)

S AEC-Q100 Qualified

S ESD Protected to ±2kV Human Body Model

Applications

Integrated Automotive and Marine GPS Receivers

Active Antennas

RFOUT1

GENERATION

GND

GAIN_SELECT

RFIN2

GND

EXTCAP/ALT_VCC

2 9

GNDGND

5 6

RFIN1RFOUT2/VCC

TDFN

TOP VIEW

AMP 2

AMP 1

MAX2670

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.

1 2 3 4 5 6 7 8 9

GPS/GNSS Front-End Amplifier 1

Inhaltsverzeichnis

Seite 1 - GPS/GNSS Front-End Amplifier

MAX2670GPS/GNSS Front-End Amplifier �� Maxim Integrated Products 1Functional Diagra

Seite 2

�� Maxim Integrated Products 2MAX2670GPS/GNSS Front-End Amplifier RFOUT1, RFOUT2,

Seite 3

�� Maxim Integrated Products 3MAX2670GPS/GNSS Front-End Amplifier Note 1: TA = +2

Seite 4

�� Maxim Integrated Products 4MAX2670GPS/GNSS Front-End AmplifierTypical Operating

Seite 5

�� Maxim Integrated Products 5MAX2670GPS/GNSS Front-End AmplifierTypical Operating

Seite 6

�� Maxim Integrated Products 6MAX2670GPS/GNSS Front-End Amplifier Pin DescriptionP

Seite 7

�� Maxim Integrated Products 7MAX2670GPS/GNSS Front-End Amplifier Detailed Descrip

Seite 8

�� Maxim Integrated Products 8MAX2670GPS/GNSS Front-End Amplifier Ordering Informa

Seite 9

MAX2670GPS/GNSS Front-End Amplifier Revision HistoryMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embod

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Inhaltsverzeichnis

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