EVA-8M - Ultra compact standalone GNSS module

The EVA-8M is a compact GNSS module, offering high sensitivity, minimal power consumption and superior anti-spoofing and anti-jamming.

The EVA-8M standard precision GNSS module features the reliable performance of the u-blox 8 positioning engine (receiving GPS, GLONASS, QZSS and SBAS signals). The EVA-8M delivers high sensitivity in the ultra compact EVA form factor.

The EVA-8M supports advanced Power Save Modes and provides message integrity protection, geofencing, spoofing detection, and odometer functionalities and is an ideal solution for cost and space-sensitive applications. It is easy to design-in, only requiring an external GNSS antenna in most applications. The layout of the EVA-8M is especially designed to ease the customer's design and limit near field interferences, since RF and digital domains are kept separated.

EVA-8M uses a crystal oscillator for lower system costs. Like other u-blox GNSS modules, the EVA-8M uses components selected for functioning reliably in the field over the full operating temperature range.

The module combines a high level of integration capability with flexible connectivity options in a miniature package. This makes it perfectly suited for industrial and massmarket end products with strict size and cost requirements. The DDC (I²C compliant) interface provides connectivity and enables synergies with most u-blox cellular modules.

Key Features:
  • Industry's smallest GPS/QZSS and GLONASS module
  • High sensitivity of -164 dBm
  • Cost‑efficient system
  • Minimal power consumption
  • Superior anti‑spoofing and anti‑jamming
  • Pin‑compatible to EVA‑7M

For sales and technical development support from our in-house engineering team, please contact the Alpha Micro team.

Parameters Specifications
Receiver type

72-channel u-blox 8 GNSS engine



Nav. update rate

Up to 18 Hz

Position accuracy
Autonomous 2.5m CEP 4.0m CEP
Cold starts 30s 33s
Aided starts 3s 3s
Reacquisition 1s 1s
Tracking & Nav. -164dBm -163dBm
Cold starts -147dBm -145dBm
Hot starts -156dBm -155dBm
Assistance GNSS

AssistNow Online

AssistNow Offline (up to 35 days)

AssistNow Autonomous(GPS only, up to 3 days)

OMA SUPL & 3GPP compliant



Real Time Clock

Can be derived either from onboard GNSS crystal or from external RTC Clock (Default mode, for lower battery current)

Anti jamming Active CW detection and removal
Memory On-board ROM
SQI Flash (optional) for:

AssistNow Offline

AssistNow Autonomous

Data logging

Supported antennas Active and passive¹
Antenna supervision Short and open circuit detection supported with external circuit
Raw data Code phase output
Odometer Integrated in navigation filter

Up to 4 circular areas

GPIO for waking up external CPU

Spoofing detection


Signal integrity Signature feature with SHA 256
Data logger² For position, velocity, time and odometer data
External LNA and SAW recommended for passive antenna applications
External Flash required
Serial interfaces



1 SPI (Optional)

1 DDC (I²C compliant)

1 SQI interface (for optional external Flash)

Digital I/O

Configurable timepulse

1 EXTINT input for Wakeup

Time pulse Configurable: 0.25 Hz to 10 MHz
Protocols NMEA, UBX binary, RTCM
Electrical data
Supply voltage

1.65 V to 3.6 V

Digital I/O voltage level

1.65 V to 3.6 V

Power consumption³

16 mA @ 3 V (Continuous)

3.7 mA @ 3V (Power Save mode, 1 Hz)

Backup supply 1.4 to 3.6 V
³ For default mode: GPS inc. QZSS, SBAS
Environmental data, quality & reliability
Operating temperature -40°C to +85°C
Storage temperature

-40°C to 105°C

RoHS compliant (lead free) and green (no halogens)
Qualification according to standard JESD47
Manufactured in ISO/TS 16949 certified production sites
Moisture sensitivity level 3



43 pin LGA (Land Grid Array): 7.0 x 7.0 x 1.1 mm, 0.13 g

Part Number Description Pack Size
EVA-8M u-blox 8 GNSS 43-pin LGA module, crystal, ROM, green (Professional grade), 7.0 x 7.0 mm
Reel of 500
Support Products
u-blox evaluation kit for EVA-8M (crystal), in single GNSS mode (GPS or GLONASS)

EVK-8/EVK-M8 evaluation kits enable simple evaluation of the high performance u-blox M8 positioning technology. The built-in USB interface provides both power supply and high-speed data transfer, and eliminates the need for an external power supply.AlphaMicro_u-blox_EVK-M8N

u-blox 8/M8 evaluation kits are compact, and their user-friendly interface and power supply make them ideally suited for use in laboratories, vehicles and outdoor locations. Furthermore, they can be used with a PDA or a notebook PC, making them the perfect companion through all stages of design-in projects.


  • Easy to use
  • Extensive visualization and evaluation features
  • Supports AssistNow Online and AssistNow Offline A-GNSS services
  • 1 USB port, 1 UART port, 1 I2C/SPI port (switchable)
  • All ports accessible outside
  • Power supply and data transfer over USB (USB V2.0 compatible)

Kit includes:

  • Compact 105 x 64 x 26 mm EVK‑M8 or EVK‑8 unit
  • USB cable
  • EVK‑M8: Active GPS / GLONASS / BeiDou antenna
  • EVK‑8: Active GPS / GLONASS antenna
  • Quick Start reference card

u-center GPS/GNSS evaluation software

The EVK-8/EVK-M8 download includes u-center, which is an interactive tool for configuration, testing, visualization and data analysis of positioning chips and modules. u-center provides useful assistance during all phases of a system integration project.

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Last updated: 23 August 2016