Datasheet > MAX2678

MAX2678

更新时间： 2024-11-06 01:09:59

品牌	Logo	应用领域
美信 - MAXIM		全球定位系统
页数	文件大小	规格书
10页	413K
描述
GPS/GNSS Front-End Amplifier

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中文翻译

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MAX2678 数据手册

EVALUATION KIT AVAILABLE

MAX2678

GPS/GNSS Front-End Ampliﬁer

General Description

Features

● First Amplifier Noise Figure: 0.9dB

The MAX2678 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

IC features the option to place a bandpass ceramic or

surface acoustic wave (SAW) filter between the two amplifi-

er stages for improved immunity to out-of-band interferers.

Additionally, a 3.4dB-gain step is provided to compensate

for cable loss variation between different applications.

● High Gain:* 35dB

● 3.4dB Gain Step

● Shared V

and RFOUT2 Pin

● Integrated 50Ω Output Matching

● AMP 2 includes 50Ω Input Matching

● 3.0V to 5.25V Supply Voltage Range

● Small (3mm x 3mm) Low-Cost Package

● AEC-Q100 Qualified

● ESD Protected to ±2kV Human Body Model

● -40°C to +105°C Ambient Temperature Range

The device is designed to operate across all GNSS

frequency standards with a 35dB typical cascaded gain

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

the use of a wide range of GNSS filter types for maximum

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

5.25V range. Alternatively, the DC supply can be applied

to pin 4.

Applications

● Integrated Automotive and Marine GPS Receivers

● Active Antennas

*First amplifier input is impedance matched (S = -10dB).

Second amplifier is set to high gain. Amplifiers are cascaded

without interstage filter.

This GPS/GNSS front-end amplifier is available in a lead-

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

Electrical performance is guaranteed over the extended

-40°C to +105°C temperature range.

Ordering Information and Typical Operating Circuit appear at end of data

sheet.

Functional Diagram

TOP VIEW

RFIN2

GND

10 RFOUT1

MAX2678

GND

AMP 2

GND

AMP 1

EXTCAP/ALT_V

GAIN_SELECT

RFIN1

RFOUT2/V

GENERATION

TDFN

19-8660; Rev 1; 11/18

12 3 4 5 6 7...10

中文翻译

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与MAX2678相关器件

型号	品牌	获取价格	描述	数据表
MAX2678GTB	MAXIM	获取价格	GPS/GNSS Front-End Amplifier
MAX2678GTB/V+	MAXIM	获取价格	Telecom Circuit,
MAX2678GTBV	MAXIM	获取价格	GPS/GNSS Front-End Amplifier
MAX2678GTBVT	MAXIM	获取价格	GPS/GNSS Front-End Amplifier
MAX2679	MAXIM	获取价格	GPS/GNSS Ultra-Low Current Low-Noise Amplifier
MAX2679	ADI	获取价格	GPS/GNSS超低电流、低噪声放大器
MAX2679B	MAXIM	获取价格	GPS/GNSS Ultra-Low Current Low-Noise Amplifier
MAX2679B	ADI	获取价格	GPS/GNSS超低电流、低噪声放大器
MAX2679BENS	MAXIM	获取价格	GPS/GNSS Ultra-Low Current Low-Noise Amplifier
MAX2679BENST	MAXIM	获取价格	GPS/GNSS Ultra-Low Current Low-Noise Amplifier

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