Specifications

L70 Hardware Design
L70_HD_V1.0 - 10 -
Time-To-First-Fix(EASY
disabled)
 Cold Start (Autonomous) 35s average@-130dBm
 Warm Start (Autonomous) 30s average@-130dBm
 Hot Start (Autonomous) 1s@-130dBm
Horizontal Position
Accuracy(@-130dBm)
 <2.5 m CEP
Max Update Rate
 Up to 10Hz,1Hz by default
Accuracy of 1PPS Signal
 Typical accuracy <15ns (Not support time service)
 Time pulse width 100ms
Velocity Accuracy
 Without Aid 0.1 m/s
Acceleration Accuracy
 Without Aid 0.1 m/s²
Dynamic Performance
 Maximum Altitude 18,000 m
 Maximum Velocity 515 m/s Maximum
 Acceleration 4 G
UART Port
 UART Port: TXD1 and RXD1
 Supports baud rate from 4800bps to 115200bps，9600bps with
default
 UART Port is used for NMEA output, MTK proprietary
messages input and firmware upgrade
Temperature range
 Normal operation: -40°C ~ +85°C
 Storage temperature: -45°C ~ +125°C
Physical Characteristics
Size: 10.1±0.15 x 9.7±0.15 x 2.5±0.15mm
Weight: Approx. 0.6g
2.2. Block diagram
The following figure shows a block diagram of L70 module. It consists of a single chip GPS IC which
includes RF part and Baseband part, a SAW filter, a TCXO and a crystal oscillator.
Serial
Flash
RF F r on t - E nd
In t e g r a t e d L NA
Fractional-N
Syntheszer
GPS Engine
ROM
Saw
filter
In t e g r a t e d
LDO
&PMU
ARM7
Processor
Peripheral
controller
RTC
RAM
RF_IN
Active
Interference
Cancellation
TCXO
32.768K XTAL
VCC
V_BCKP
UART
NRESET
EXTINT
1PPS
VCC_RF
ANTON
Figure 1: Module block diagram
Quectel
Confidential