MAX2678

GPS/GNSS Front-End Amplifier

Dual-Stage, Low-Noise Amplifier Solution Includes Gain-Step Control


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说明

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 amplifier 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.

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.

This GPS/GNSS front-end amplifier is available in a lead-free, 10-pin TDFN surface-mount package (3mm × 3mm). Electrical performance is guaranteed over the extended -40°C to +105°C temperature range.
MAX2678: Functional Diagram MAX2678: Functional Diagram 放大+

关键特性

  • First Amplifier Noise Figure: 0.9dB
  • High Gain:* 35dB
  • 3.4dB Gain Step
  • Shared VCC and RFOUT2 Pin
  • Integrated 50Ω Output Matching
  • AMP 2 includes 50Ω Input Matching
  • 3.0V to 5.25V Supply Voltage Range
  • Small (3mm × 3mm) Low-Cost Package
  • AEC-Q100 Qualified
  • ESD Protected to ±2kV Human Body Model
  • -40°C to +105°C Ambient Temperature Range

*First amplifier input is impedance matched (S11 = -10dB).
Second amplifier is set to high gain. Amplifiers are cascaded without interstage filter.

应用

  • 有源天线
  • 集成汽车与航海GPS接收器
Part NumberRF Freq.
(MHz)
RF Freq.
(MHz)
Noise Figure
(dB)
Gain
(dB)
Input IP3
(dBm)
ISUPPLY
(mA)
Footprint
(mm x mm)
Package/PinsBudgetary
Price
minmaxSee Notes
MAX2678 15751575134.8-12253.0 x 3.0
TDFN/10
$1.20 @1k
查看所有Low-Noise Amplifiers (42)
Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。


MAX2678EVKIT: Evaluation Kit for the MAX2678

质量和环境数据

申请可靠性报告: MAX2678 
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CAD Symbols and Footprints

  • MAX2678GTB/V+
  • MAX2678GTB/V+T
  • 型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

    备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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