Linx Technologies EVM-GPS-F4 User Manual

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F4 Series

Evaluation Module

User's Guide

Page 2

Warning: Some customers may want Linx radio frequency (“RF”)

products to control machinery or devices remotely, including machinery or devices that can cause death, bodily injuries, and/or property damage if improperly or inadvertently triggered, particularly in industrial settings or other applications implicating life-safety concerns (“Life and Property Safety Situations”).

Table of Contents

1 Description 2 Ordering Information 2 ElectricalSpecications

NO OEM LINX REMOTE CONTROL OR FUNCTION MODULE SHOULD EVER BE USED IN LIFE AND PROPERTY SAFETY SITUATIONS. No OEM Linx Remote Control or Function Module

should be modiﬁed for Life and Property Safety Situations. Such modiﬁcation cannot provide sufﬁcient safety and will void the product’s regulatory certiﬁcation and warranty.

Customers may use our (non-Function) Modules, Antenna and Connectors as part of other systems in Life Safety Situations, but only with necessary and industry appropriate redundancies and in compliance with applicable safety standards, including without limitation, ANSI and NFPA standards. It is solely the responsibility of any Linx customer who uses one or more of these products to incorporate appropriate redundancies and safety standards for the Life and Property Safety Situation application.

Do not use this or any Linx product to trigger an action directly from the data line or RSSI lines without a protocol or encoder/ decoder to validate the data. Without validation, any signal from

another unrelated transmitter in the environment received by the module could inadvertently trigger the action.

All RF products are susceptible to RF interference that can prevent communication. RF products without frequency agility or hopping

implemented are more subject to interference. This module does not have a frequency hopping protocol built in.

3 Pin Assignments 3 Pin Descriptions 4 Schematic 5 PCB Layout 5 Power Supply Requirements

Do not use any Linx product over the limits in this data guide. Excessive voltage or extended operation at the maximum voltage could cause product failure. Exceeding the reﬂow temperature proﬁle could cause product failure which is not immediately evident.

Do not make any physical or electrical modiﬁcations to any Linx product. This will void the warranty and regulatory and UL certiﬁcations

and may cause product failure which is not immediately evident.

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F4 Series GPS Receiver

Evaluation Module

User's Guide

Figure 1: F4 Series Evaluation Module

Description

The F4 Series GPS receiver module is a self-contained high-performance GPS receiver with an on-board LNA and SAW ﬁlter. Based on the SiRFstar IV chipset, it provides exceptional sensitivity, even in dense foliage and urban canyons. The module’s very low power consumption helps maximize runtimes in battery powered applications. With over 200,000 effective correlators, the F4 Series receiver can acquire and track up to 48 satellites simultaneously in just seconds, even at the lowest signal levels. These features, along with the module’s standard NMEA data output, make it easy to integrate, even by engineers without previous RF or GPS experience. The Linx F4 Series GPS modules offer a simple, efﬁcient and costeffective method of adding GPS capabilities to any product.

The evaluation module contains the surface mount F4 Series GPS module, an SMA connector, a 1.8V regulator, voltage level shifters (voltage level protection for RXM and TXM lines), a microcontroller (performs F4 power up sequence), a power source switch (switches to VBACKUP when VCC is removed) and a ferrite bead (used to supply power to an external active antenna, such as the Linx SH Series active GPS antenna), all on a single board with through-hole headers. This small board makes prototyping with the F4 Series module very easy.

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Revised 3/18/2015

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Ordering Information

Pin Assignments

Ordering Information

Part Number Description

EVM-GPS-F4 F4 Series Evaluation Module

RXM-GPS-F4 F4 Series GPS Receiver Module

Figure 2: Ordering Information

ElectricalSpecications

Ordering Information

Parameter Designation Min. Typ. Max. Units Notes

POWER SUPPLY

Supply Voltage V

Input Pin Voltage 3.6 VDC

Output Pin Voltage 1.8 VDC

Supply Current I

Peak 130 mA 1

Acquisition 46 mA 1

Tracking 27.5 mA 1

Hibernate 20 µA 2

Ready-to-Start 9 µA 2

ANTENNA PORT

RF Input Impedance R

ENVIRONMENTAL

Operating Temperature Range –30 +85 °C

Storage Temperature Range –40 +85 °C

Notes:

1. VCC = 1.8V

2. Initial state after power us applied

Figure 3: Electrical Speciﬁcations

Warning: This product incorporates numerous static-sensitive

components. Always wear an ESD wrist strap and observe proper ESD handling procedures when working with this device. Failure to observe this precaution may result in module damage or failure.

1.71 1.8 1.89 VDC

50 Ω

GND GPIOD GPIOE

TXM

RXM

1PPS

RESET

RFPWRUP

ON_OFF

GND

Figure 4: EVM-GPS-F4 Pin Assignments

Pin Descriptions

Pin Number Name I/O Description

1 GPIOD I/O General Purpose I/O. 3.6V tolerant.

2 GPIOE I/O General Purpose I/O. 3.6V tolerant.

3 1PPS O 1 Pulse Per Second. 1.8V level.

4 TX O Serial output (default NMEA)

5 RX I Serial input (default NMEA). 3.6V tolerant.

6 GPIOC I/O General Purpose I/O. 3.6V tolerant.

7, 11 P1, P2 I Pull to 1.8V VCC through 2.2k resistors.

8 /RESET I

9 RFPWRUP O Power State Indicator

10 ON_OFF I

12 VCC P Supply Voltage

13 G1 I Pull to GND through a 100k resistor.

14 GPIOA I/O General Purpose I/O. 3.6V tolerant.

15 GPIOB I/O General Purpose I/O. 3.6V tolerant.

16, 17 NC − No electrical connection.

18, 20, 21, 22 GND P Ground

19 RFIN I GPS RF signal input

Reset Input. Active low with an internal pull-up. Internal reset is preferred; external reset will clear all RAM. 3.6V tolerant.

Power Control Pin. Internal 10k pull-down resistor.

3.6V tolerant.

GND NC NC VCC NC VBACKUP GPIOC GPIOB GPIOA GND

Figure 5: F4 Series GPS Receiver Pin Descriptions

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Schematic

1.20”

(2.54)

ANT1

PCB Layout

GND

2-5

CONSMA001

GND

(47.24)

Ø0.04” x 10

(1.02)

VCCNC

VCC

1IN2

V1.8

TXM

4,7

TX_SHIFT

OUT

GND

MC74VHC1GT50

GND

1uF

Vout

GND

Vin

1uF

VCC

5S63,8

A1NC2D

VCC

V1.8NC

VCC

1IN2

GND

FDFMA2P857

VBACKUP

RX_SHIFT

VPP MCLR

OUT

GND

GND RXM

PGC

5NC6

PGC

VDD2GND

VPRG

MC74VHC1GT50

PGD

GND

Program Header

300ohm BEAD

VCC

18pF

GND

123456789

VCC

GND

123456789

GND

GPIOE

GPIOD

TX_SHIFT

V1.8

GND

GND GND

GND

GPIOA

GPIOBGPIOC

NC16NC

GND

GPIOA14GPIOB

GND

TXM

RXM

GND

V1.8

VPRG

VPPRFPWRUP

VCC

GP3/P

GP0/D1GND2GP1/C

GND

PGD

2.2K

/RESET

GP2

VCC ON_OFF

100K

12G113

VCC

RFPWRUP

100K

ON_OFF

100K

2.2K

RXM-GPS-F4

PGC

GND

RFIN

GPIOD1GPIOE21PPS3TX4RX5GPIOC6P17/RESET8RFPWRUP9ON_OFF

1PPS

GPIOE

GPIOD

GPIOB

GPIOA

GPIOC

/RESET

VBACKUP

1PPS

/RESET

ON_OFF

RX_SHIFT

RFPWRUP

GND

0.10”

(2.54)

1.10”

(27.94)

0.10”

(2.54)

1.00”

0.10”

Figure 6: EVM-GPS-F4 PCB Layout Dimensions

(25.40)

Power Supply Requirements

The transceiver incorporates a precision low-dropout regulator which allows operation over a wide input voltage range. Despite this regulator, it is still important to provide a supply

Vcc IN

that is free of noise. Power supply noise can signiﬁcantly affect the module’s performance, so providing a clean power supply for the module should be a high priority during design.

Figure 7: Supply Filter

A 10Ω resistor in series with the supply followed by a 10µF tantalum capacitor from Vcc to ground helps in cases where the quality of supply power is poor (Figure 7). This ﬁlter should be placed close to the module’s supply lines. These values may need to be adjusted depending on the noise present on the supply line.

Vcc TO MODULE

10Ω

10µF

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Linx Technologies

159 Ort Lane

Merlin, OR, US 97532

Phone: +1 541 471 6256

Fax: +1 541 471 6251

www.linxtechnologies.com

Disclaimer

Linx Technologies is continually striving to improve the quality and function of its products. For this reason, we reserve the right to make changes to our products without notice. The information contained in this Data Guide is believed to be accurate as of the time of publication. Speciﬁcations are based on representative lot samples. Values may vary from lot-to-lot and are not guaranteed. “Typical” parameters can and do vary over lots and application. Linx Technologies makes no guarantee, warranty, or representation regarding the suitability of any product for use in any speciﬁc application. It is the customer’s responsibility to verify the suitability of the part for the intended application. NO LINX PRODUCT IS INTENDED FOR USE IN ANY APPLICATION WHERE THE SAFETY

OF LIFE OR PROPERTY IS AT RISK.

Linx Technologies DISCLAIMS ALL WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL LINX TECHNOLOGIES BE LIABLE FOR ANY OF CUSTOMER’S INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING IN ANY WAY FROM ANY DEFECTIVE OR NON-CONFORMING PRODUCTS OR FOR ANY OTHER BREACH OF CONTRACT BY LINX TECHNOLOGIES. The limitations on Linx Technologies’

liability are applicable to any and all claims or theories of recovery asserted by Customer, including, without limitation, breach of contract, breach of warranty, strict liability, or negligence. Customer assumes all liability (including, without limitation, liability for injury to person or property, economic loss, or business interruption) for all claims, including claims from third parties, arising from the use of the Products. The Customer will indemnify, defend, protect, and hold harmless Linx Technologies and its ofﬁcers, employees, subsidiaries, afﬁliates, distributors, and representatives from and against all claims, damages, actions, suits, proceedings, demands, assessments, adjustments, costs, and expenses incurred by Linx Technologies as a result of or arising from any Products sold by Linx Technologies to Customer. Under no conditions will Linx Technologies be responsible for losses arising from the use or failure of the device in any application, other than the repair, replacement, or refund limited to the original product purchase price. Devices described in this publication may contain proprietary, patented, or copyrighted techniques, components, or materials. Under no circumstances shall any user be conveyed any license or right to the use or ownership of such items.

The stylized Linx logo, Wireless Made Simple, WiSE, CipherLinx and the stylized CL logo are trademarks of Linx Technologies.