TAU1312-datasheet

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TAU1312 Multi-Band GNSS RTK Module

Feature

  • Supports GPS, BDS, GLONASS, Galileo, and QZSS
  • Compact size for high precision industry
  • Integrated Real Time Kinematics (RTK)
  • State-of-art low power consumption
  • Supports multi-band multi-system high-precision raw data output, easy for 3rd party integration
  • Highly integrated module, the best cost-effective high precision GNSS solution
  • Compact size 12*16mm

Table 1 TAU1312 P/N


Product photo

Block diagram

Specifications

Table 2

Parameter Specifications
Constellations BDS, GPS, QZSS, GLONASS, Galileo, NavIC, SBAS
Channel 40
Update rates PVT 10Hz
RTK 5Hz Max
Position accuracy GNSS 2.5m CEP
SBAS <1.0m CEP
RTK 1.5 cm + 1 ppm (H)
6.5 cm + 1 ppm (V)
Velocity & Time accuracy GNSS 0.1 m/s CEP
1PPS 20ns RMS
TTFF Hot start 2s
Cold start 24s
RTK Convergence time <10s
Reliability >99.9%
Sensitivity Cold start -148 dBm
Hot start -158 dBm
Reacquisition -160 dBm
Tracking & navigation -162 dBm
Protocol NMEA-0183 V4.00/4.10
RTCM 3.X
Baudrate 115200 bps, by default
Operating condition Main supply 2.0V to 3.6V
Digital I/O supply 1.8V to 3.6V
Backup supply 1.8V to 3.6V
Power consumption Tracking GNSS 34 mA @ 3.3V
Single system 22 mA @ 3.3V
Standby Data backup 12 uA
RTC 1.4 uA
Serial interface UART 1
SPI 1
I2C 1
Operating limit Velocity 515 m/s
Altitude 18,000m
Environmental conditions Operating temp. -40°C to +85°C
Storage temp. -40°C to +90°C
Humidity 95% RH
Size 16.0×12.2×2.4 mm, 24pin LCC

GNSS Reception

Table 3 GNSS reception table

P/N OPTIONS GPS/QZSS BDS GLONASS GALILEO IRNSS
L1C/A L1C L2C L5 L6 B1I B1C B2I B2a B3I L1 L2 E1 E5 E6 L5
TAU1312-1216A00 A,L1+L5 * * * * * * *
B,L1+L2 * * * * * * *

PIN DESCRIPTION

Pin Assignment

Figure 3 Pin assignment (top view)

Detailed Pin Descriptions

Table 4 Detailed pin descriptions

ELECTRICAL CHARACTERISTICS

Absolute Maximum Rating

Table 5 Absolute rating

Symbol Parameter Min. Max. Unit
VDD Power input for the main power domain -0.5 3.63 V
AVDD_BAK Power input for the backup power domain -0.5 3.63 V
AVDUSB USB supply voltage -0.5 3.6 V
T storage Storage temperature -40 85 °C
T solder Solder reflow temperature -- 260 °C

IO Characteristics

PRRSTX and PRTRG

Table 6 PRRSTX and PRTRG

Symbol Parameter Condition Min. Typ. Max. Unit
I IZ Input leakage current -- -- -- +/-1 uA
V IH Input high voltage -- AVDD_BAK*0. 7 -- AVDD_BAK V
V IL Input low voltage -- 0 -- AVDD_BAK*0.3 V
C i Input capacitance -- -- -- 10 pF
R PU Pull-up resistance -- 18 -- 84 kOhm

USB I/O

Table 7 USB signal

Others

Table 8 Others

DC Characteristics

Operating Conditions

Table 9 Operating Conditions

Power Consumption

Table 10 Power consumption

HARDWARE DESCRIPTION

Connecting Power

Power on/off Sequence

Initial system power on

Main power supply off/on in application

Antenna design

Reset and mode control

Default Serial interfaces

Table 11 Default message

Interface Settings
UART output 115200 baud, 8 data bits, no parity bit, 1 stop bitConfigured to transmit both NMEA and HD Binary protocols, but only the following
NMEA (and no HD Binary sentence) messages have been activated at start-up:
GGA, GSA, GSV, RMC, ZDA, TXT-ANT
UART input 115200 baud, 8 data bits, no parity bit, 1 stop bit, autobauding disabled
Automatically accepts following protocols without need of explicit configuration:
HD binary sentence, NMEA, RTCM
The GNSS receiver supports interleaved HD binary and NMEA messages.
Timepulse,(1Hz Nav) 1 pulse per second, synchronized at rising edge, pulse length 100ms

5 MECHANICAL SPECIFICATION

Dimensions

Figure 6 Dimensions

Table 12 Dimensions

Symbol Min.(mm) Typ.(mm) Max.(mm)
A 12.0 12.2 12.4
B 15.8 16.0 16.2
C 2.2 2.4 2.6
D 0.9 1.0 1.3
E 1.0 1.1 1.2
F 2.9 3.0 3.1
H -- 0.8 --
K 0.4 0.5 0.6
M 0.8 0.9 1.0
N 0.7 0.8 0.9

REFERENCE DESIGN

Minimal design

This is a minimal design for TAU1312 GNSS module. The 82nH inductor is used only when an active antenna is connected, and no need with a passive antenna. The characteristic impedance from RF_IN pin to the antenna connector should be 50Ω.

Figure-7-application-disgram

PCB Footprint Reference

Figure-7-application-disgram

Layout

(1) A decoupling capacitor should be placed close to VDD pin of the module, and the width of power routing should be more than 0.5mm.

(2) The width of RF routing between RF port to antenna interface should be wider than 0.2mm. The characteristic impedance of RF routing between RF port to antenna interface should be controlled to 50Ω.

(3) It is recommended that the routing from RF port to antenna interface refers to the second layer,and no routing are recommended on the layer.

(4) Do not place the module close to any EMI source, like antenna, RF routing, DC/DC or power conductor, clock signal or other high-frequency switching signal, etc.

PRODUCT PACKANG AND HANDLING

Packaging

Packing Notes

TAU1312 is a Moisture Sensitive Device (MSD) and Electrostatic Sensitive Device (ESD). During the packing and shipping, it is strictly required to take appropriate MSD handling instructions and precautions. The table below shows the general packing hierarchy for the standard shipment.

Tape and Reel

Shipment Packaging

Storage

ESD Handling Precautions

ESD protection measures

Moisture sensitivity level

The Moisture Sensitivity Level (MSL) of the GNSS module is MSL4.


LABELING AND ORDERING INFORMATION

Labeling

Ordering info

Table 15 P/N