西博位置+

西博科技

ublox
网站首页 > 产品选型 > 高性能卫星定位 > UBLOX方案

    GMA25C

    GMA25C是一款高性能GNSS导航定位电子罗盘天线一体模组接收机,基于Ublox G8030 GNSS接收机芯片,支持GPS、GLONASS, BEIDOU, GALILEO,QZSS以及卫星增强系统SBAS。具有高灵敏度、低功耗优势,可广泛应用于高精度定位、无人机、车载设备、手持终端、行业领域等。

    1. 详细信息

    APPLICABLE PRODUCT P/NO OR PURCHASE CODE : 19-GMA25C0-00

     

    1.  OVERVIEW

     

    1.1 Description

    §   GMA25C is a GNSS receiver, build-in high sense -167dBm chip on board, with a 3-axis magnetic sensor integrated. Featuring Ublox single die high performance and low power consumption positioning M8 engine, GMA25C provides excellent sensitivity and short TTFF with no host interaction needed. It is suitable for vehicle or UAV products require for high sensitivity and need fast TTFF in weak signal environments.

    §   GMA25C integrates the QMC5883, which is an AEC-Q100 qualified complete 3-axis magnetic sensor with on-chip signal processing and integrated I2C bus suitable for use in UAV applications. The device can be connected directly to a microprocessor, eliminating the need for A/D converters or timing resources.

     

    1.2 GNSS Features

    §   UBLOX ultra high sensitivity solution

    §   72-Channel u-blox 8 engine with 2million effective correlators

    §   Supports Assisted GPS Online and offline Operation

    §   High Sensitivity acquisition, reacquisition and tracking sensitivity

    §   Supports standard NMEA-0183 and UBX protocol

    §   Supports standard RTCM 10402.3 ( RTCM stream automatically read and processed )

    §   Hybrid GPS/GLONASS/BEIDOU/SBAS engine ( WAAS, EGNOS, MSAS )

    §   High immunity to jamming

    §   Up to 10Hz update rate

    §   Built-In Back-up power supply for RTC

    §   Internal Patch ANT Size : (w)mm× (d)mm×4.0(h)mm

    §   RoHS Compliant ( lead-free )

     

    1.3 Magnetic Sensor Features

    §   AEC-Q100 Grade 2 Qualified

    §   Superior Dynamic Range and Accuracy

    §   ±8G FSR with 16bits operation, 0.25mG per LSB resolution, 0.6mG total RMS noise

    §   Enables heading accuracy of 1º, Max output data rate of 600Hz

    §   Industrial Standard Low profile package 3.0x3.0x1.0mm

    §   Degaussing with built-in SET/RESET function

    §   Eliminates thermal variation induced offset error (Null field output)

    §   Clears the residual magnetization resulting from strong external fields

    §   On-chip sensitivity compensation, temperature sensor

    §   Motion_Detection and Data_Ready Interrupt

    §   1µA power down current

    §   I2C Slave, FAST(≤400KHz) mode

     

    1.3 Product Applications

    §   UAV


    3.  GENERAL SPECIFICATION

     

    3.1 General specification

     

    No.

    ITEM

    SPEC

    1

    Receiving Frequency1

    GPS L1, GLONASS G1, BEIDOU B1

    2

      SBAS supported

    WAAS, EGNOS, MSAS, GAGAN

    3

      QZSS supported

    QZSS

    1  Ready to support Galileo E1B/C when available. The default configuration is GPS+GLONASS

     

    3.2 Accuracy

     

    No.

    ITEM

    SPEC

    1

    Horizontal position accuracy(-130dBm)

    2.5 meter CEP, 24hours static, without SA

    2.0 meter CEP, 24hours static, with SBAS

    2

    Velocity accuracy

    0.1 meter/second , without SA

     

    3.3 Datum

     

    No.

    ITEM

    SPEC

    1

    Datum

    WGS-84 (Default)

     

     

     

    3.4 Acquisition Rate

     

    No.

    ITEM

    SPEC

    1

    Hot start2

    1 s, Autonomous

    2

    Cold start2

    26 s, Autonomous

    2 6 SVs, All satellites at -130 dBm

     

    3.5 Sensitivity

     

    No.

    ITEM

    SPEC

    1

    Tracking Sensitivity

    -167dBm , Typical

    2

    Acquisition Sensitivity

    -148dBm , Typical

    3

    Reacquisition Sensitivity

    -160dBm , Typical

    4

    Hot start Sensitivity

    -156dBm, Typical

     

    3.6 Dynamic condition

     

    No.

    ITEM

    SPEC

    1

    Velocity

    500m/s (Max)

    2

    Altitude

    50000m

    3

    Acceleration

    4g

     

    3.7 DC power

     

    No.

    ITEM

    SPEC

    1

    Main Power

    +3.0V ~ +5.5V  DC, typical 5.0V

    3

    Supply Current

    45mA @ 5.0V   DC typical

     

    3.8 Serial Port

     

    No.

    ITEM

    SPEC

    1

    Electrical Interface

    Full duplex serial communication

    2

    Baud rate

    9600bps (Default), 1Hz update

    3

    Protocol Message

    NMEA-0183 (Default) and UBX protocol

     

     

    3.9 Magnetic Sensor Performance

     

    Characteristics

    Conditions

    Min

    Typ

    Max

    Units

    Field Range (Each Axis)

    Total applied field


    8


    G

     

    Supply Voltage

    VDD

    2.16

    2.5

    3.6

    V

    VDDIO(I2Interface and INT)

    1.62

    1.8

    3.6

    V

    Supply Voltage rise time




    5.0

    ms

     

    Supply Current1

    (7 measurements/second)

    BW=00


    100


    µA

    BW=01


    50


    µA

    BW=10


    25


    µA

    BW=11


    10


    µA

    Power Down Current



    1.0


    µA

    Operating Temperature


    -40


    105

    C

    Storage Temperature


    -55


    125

    C

    Linearity Error

    (Best fit straight line)

    FS=±8G

    Happlied=±4G


    0.2


    %FS

    Hysteresis

    3 sweeps across ±8G


    0.2


    %FS

    Repeatability Error

    3 sweeps across ±8G


    0.2


    %FS

    Alignment Error



    1.0

    3.0

    Degrees

    Transverse Sensitivity



    2.0


    %

     

    Total RMS Noise

    BW=00


    0.4


    mG

    BW=01


    0.6


    mG

    BW=10


    1.0


    mG

    BW=11


    1.2


    mG

    Output resolution



    16


    Bits

     

    Max Output data rate

    BW=00


    100


    Hz

    BW=01


    200


    Hz

    BW=10


    400


    Hz

    BW=11


    600


    Hz

    Heading accuracy2



    1.0


    Degrees

    Sensitivity

    8 G


    5


    %



    4096


    counts/G

    Sensitivity Change Over Temperature3

    -40~105

    Delta from 25

    8 G


    8


    %

     

    Null Field Output



    0.1


    G



    32768


    Counts

    Temperature Sensor Output



    0.8


    C/Count

    Disturbing Field4



    36


    G

    Maximum Exposed Field




    10,000

    G

    1  Supply current is proportional to how many measurements performed per second

    2  MEMSIC product enables users to utilize heading accuracy to be 1.0 degree typical when using MEMSIC’s proprietary software or algorithm

    3 Determined by 77pcs x 3 lot characterization

    4 This is the magnitude of external field that can be tolerated without changing the sensor characteristics. If the disturbing field is exceeded, a SET/RESET operation is required to restore proper sensor operation

     

     

     

     

    4.  ELECTRICAL CHARACTERISTICS

     

    4.1   Absolute Maximum Ratings

     

    Parameter

    Symbol

    Min

    Max

    Units

    Power Supply Voltage

    VDD

    0

    6.0

    V

    Serial Port Input Voltage

    Vin

    -0.5

    3.6

    V

    ESD Contact

    Vesd


    2000

    V

    Storage Temperature

    Ts

    -40℃

    +85℃

     

     

    4.2 Electrical characteristics

    ( Test temp :   25℃ )

     

    Characteristics

    Symbol

    Min

    Typ

    Max

    Units

    Power Supply Voltage

    VDD

    3.0

    5.0

    5.5

    V

    Supply Peak Current (Tracking)

    Icc

    -

    -

    50

    mA

    Supply Peak Current (Acquisition)

    Icc

    -

    -

    70

    mA

    Operation Temperature

    T

    -30℃

    +25

    +80℃

     

     

    4.3 Basic Physical characteristics

     

    Characteristics

    Symbol

    Min

    Typ

    Max

    Units

    Length

    L

    -

    35.0

    -

    mm

    Width

    W

    -

    35.0

    -

    mm

    MAX High

    H

    -

    -

    8.8

    mm

    Tolerance: ±0.3mm


    Powered by MetInfo 5.3.13 ©2008-2017 www.metinfo.cn