Leadtek LR9101 Manuel utilisateur

LEADTEK GPS MODULE

LR9101

Specifications Sheet

Features:

SiRF StarIII low power single

chipset

Compact module size for easy

integration : 15 x 14 x 2.8 mm

Built-in high gain amplifier and

bandpass filter

RoHS compliance

ALL INFORMATION CONTAINED HEREIN IS THE SOLE PROPERTY OF LEADTEK RESEARCH AND CANNOT BE

DISSEMINATED WITHOUT THE EXPRESS WRITTEN CONSENT OF LEADTEK RESEARCH.

Revision History:

Revision

Release Date

Issuer

Change Description

1.5

2008/04/24

M. Huang

Add ESD spec.; modify recommended footprint

1.6

2008/05/22

M. Huang

Wording correction; modify operating temperature range &

recommended footprint

Add packing spec. & reflow profile

1.7

2008/08/07

J. Lee

Revise chip spec & add reflow condition

1.8

2008/12/30

J. Lee

Change default periods for protocol message

1.9

2009/03/17

J. Lee

Upgrade to FW3.5 and add RoHS soldering profile

2.0

2009/09/15

J. Lee

Modify the pin assignment

2.1

2009/10/05

S.Liao

Modify the pin assignment

Leadtek Confidential - Information is subject to change without prior notice.

LR9101 Specifications Sheet Rev. 2.0

1. Introduction

The Leadtek LR9101 module is a high sensitivity, high gain, low power and very

compact Surface Mount Device (SMD). This 20-channel global positioning system (GPS)

receiver is designed for a broad spectrum of OEM applications and is based on the fast

and deep GPS signal search capabilities of SiRFStarIII GSC3f/LP architecture. Leadtek

LR9101 is designed to allow quick and easy integration into GPS-related applications,

especially for compact size devices, such as:

PDA, Pocket PC and other computing devices

Fleet Management / Asset Tracking

AVL and Location-Based Services

Hand-held Device for Personal Positioning and Navigation

1.1 Features

1.1.1 Hardware and Software

Based on the high performance features of the SiRF Star III low power single chipset.

Built-in high gain amplifier and bandpass filter

RoHS compliant (lead-free)

Compact module size for easy integration: 15x14x2.8 mm (590.6x551.2x110.2 mil)

SMT pads allow for fully automatic assembly processes equipment and reflow soldering

SiRFLocTM Client AGPS support

1.1.2 Performance

Cold/Warm/Hot Start Time: 35 / 35 / 1 sec.

Reacquisition Time: 0.1 second

RF Metal Shield for best performance in noisy environments

Multi-path Mitigation Hardware

Leadtek Confidential - Information is subject to change without prior notice.

LR9101 Specifications Sheet Rev. 2.0

1.1.3 Interface

TTL level serial port for GPS communications interface

Protocol: NMEA-0183/SiRF Binary (default NMEA)

Baud Rate: 4800 bps

1.2 Advantages

Ideal for compact size devices

Data / Power / RF through surface mount pads

Cost saving through elimination of RF and board to board digital connectors

Flexible and cost effective hardware design for different application requirements

Secure SMD PCB mounting method

Leadtek Confidential - Information is subject to change without prior notice.

LR9101 Specifications Sheet Rev. 2.0

2. Technical specifications

2.1 Module architecture

SiRF GSC3f/LP

9101 Block Diagram

Leadtek Confidential - Information is subject to change without prior notice.

LR9101 Specifications Sheet Rev. 2.0

2.2 Hardware Features

Based on the high performance features of the SiRF Star III low power single

chipset

Built-in high gain amplifier and bandpass filter

Compact module size for easy integration: 15x14x2.8 mm (590.6x551.2x110.2 mil)

SMT pads allow for fully automatic assembly processes equipment and reflow soldering

RoHS compliant (lead-free)

2.3 Software Features

The firmware used on Leadtek 9101 module is GSW3.5, the software for SiRF StarIII

low power single chipset receivers, and the default configuration is as following

description:

Item

Description

Core of firmware

SiRF GSW3.5

Baud rate

4800 bps

Code type

NMEA-0183 ASCII

Datum

WGS-84

Protocol message

GGA(1s), GSA(5s), GSV(5s), RMC(1s),VTG(1s)

Output frequency

1 Hz

2.4 Mechanical specification

The Physical dimensions of the Leadtek 9101 GPS Module are as follow:

Items

Description

Length

15.0 ± 0.3 mm

Width

14.0 ± 0.3 mm

Height

2.80 ± 0.3 mm

Weight

1.8 g

Leadtek Confidential - Information is subject to change without prior notice.

LR9101 Specifications Sheet Rev. 2.0

2.5 Recommended GPS Antenna Specification

This LR9101 receiver is designed for use with passive antenna.

Parameter

Specification

Antenna Type

Right-hand circular polarized passive antenna

Frequency Range

1575.42 ± 1.023 MHz

2.6 Environmental Specification

Item

Description

Operating temperature rang

-30 deg. C to +85 deg. C

Storage temperature range

-55 deg. C to +100 deg. C

Humidity

up to 95% non-condensing or a wet

bulb temperature of +35 deg. C

Altitude

18,000 meters (60,000 feet) max.

Velocity

515 meters/second (1000 knots)

max.

Jerk

20 meters/second3, max.

Acceleration

4g, max.

2.7 ESD Specification

Air Discharge: 2 ; 4 ; 8KV ( direct )

Contact Discharge: 2 ; 4 KV ( direct / indirect )

Leadtek Confidential - Information is subject to change without prior notice.

LR9101 Specifications Sheet Rev. 2.0

2.8 Reference design

All ground pads attach directly to ground plane by way of via.

All components are reference only.

Recommendation for the external antenna: antennas over 16dB.

Leadtek Confidential - Information is subject to change without prior notice.

LR9101 Specifications Sheet Rev. 2.0

3. Performance Characteristics

3.1 Position and velocity accuracy

Accuracy

Position

10 meters, 2D RMS

5 meters 2D RMS, WAAS corrected

<5meters(50%)

Velocity

0.1 meters/second

Time

1 microsecond synchronized to GPS time

3.2 Dynamic constrains

Dynamic

Conditions

Altitude

18,000 meters (60,000 feet) max.

Velocity

515 meters/second (1000 knots) max.

Acceleration

4g, max.

Jerk

20 meters/second3, max.

3.3 Acquisition time 1

Mode

Leadtek 9101

GPS Module

TTFF Hot

(valid almanac, position, time & ephemeris)

1 s

TTFF Warm

(valid almanac, position, & time)

35 s

TTFF Cold

(valid almanac)

35 s

re-acquisition

(<10 s obstruction with valid almanac, position,

time & ephemeris)

100 ms

Note 1: Open Sky and Stationary Environments.

Leadtek Confidential - Information is subject to change without prior notice.

LR9101 Specifications Sheet Rev. 2.0

3.4 Timing 1PPS output

The 1PPS pulse width is 1 μs, this 1PPS is NOT suited to steer various oscillators

(timing receivers, telecommunications system, etc).

3.5 Sensitivity

Parameter

Description

Tracking Sensitivity

-159 dBm

Acquisition Sensitivity

-155 dBm

3.6 Battery backup (SRAM/RTC backup)

During ‘Powered down’ condition, the SRAM and RTC (Real Time Clock may be kept

operation by supplying power from VBATT. The Leadtek 9101 GPS module can accept

slow VBATT supply rise time (unlike many other SiRFstarII based receivers) due to an

on-board voltage detector.

3.7 Differential aiding

3.7.1 Differential GPS (DGPS) Optional

DGPS specification improves the Leadtek 9101 GPS Module horizontal position

accuracy to <4M 2dRMS.

3.7.2 Satellite Based augmentation System (WASS/EGONS) Optional

The Leadtek 9101 GPS Module is capable of receive SBAS(WASS and EGONS)

differential corrections. SBAS improves horizontal position accuracy by correcting GPS

signal errors caused by ionospheric Disturbances, timing and satellite orbit errors.

Both SBAS and DGPS should improve position accuracy. However, other factors can

affect accuracy, such as GDOP, multipath, distance from DGPS reference station and

latency of corrections.

Leadtek Confidential - Information is subject to change without prior notice.

LR9101 Specifications Sheet Rev. 2.0

4 Hardware Interface Power supply

Parameter

Leadtek 9101 GPS Module

Input voltage

3.2~ 5.0 VDC

Current (typ.) at full power (3.3V)

45mA

Battery backup voltage

1.65~5.0 VDC

4.1 Power Consumption

Status

Power Consumption

Acquisitioning

45 mA

Tracking

45 mA

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