CD-PA1616D GNSS patch antenna module Data Sheet

1.1 Product description
The CDTop CD-PA1616D module utilizes the MediaTek new generation GNSS Chipset MT3333  that support various location and navigation applications, including autonomous GPS, GLONASS, GALILEO, QZSS, SBAS(note) ranging (WAAS, EGNOS, GAGAN, MSAS),QZSS,DGPS(RTCM) and AGPS. It support up to 210 PRN channels with 99 search channels and 33 simultaneous tracking channels. It is the industry’s highest level of sensitivity (-165dBm) and instant Time-to-First Fix (TTFF). Precise GNSS signal processing give the ultra-precise positioning under low receptive, high velocity conditions. Up to 12 multi-tone active interference canceller (ISSCC2011 award), customer can have more flexibility in system design. Power management design makes CD-PA1616D easily integrated into your system without extra voltage regulator. CD-PA1616D allows direct battery connection, no need any external LDO and gives customers plenty of choices for their application circuit. The excellent low power consumption of CD-PA1616D make it easier to applied to power sensitive devices, especially portable applications, need not worry about operating time anymore and user can get more fun. It also combined with many advanced features including AlwaysLocate™™, EASY™™, EPO™™, and logger function. Application: >> Asset management > Handheld DeviceくM2M applicationくSecurity industry > Surveillance >> Tablet PC/PLB/MID
1.2 Features
. Built-in 15x15x4.0mm ceramic patch antenna on the top of module Ultra-High Sensitivity: -165dBm (w/o patch antenna), up to 45dB C/N of SVs in open sky reception. . ● AlwaysLocate: Intelligent Algorithm (Advance Power Periodic Mode) for power saving . EASY: Self-Generated Orbit Prediction for instant positioning fix ● GPS Consumption current(@3.3V): Acquisition: 34mA Typical . . Tracking: 29mA Typical . High accuracy 1-PPS timing support for Timing Applications (±20ns jitter) . High Update Rate: up to 10Hz(note1) ●   Logger function Embedded(note2) Supports QZSS, SBAS(WAAS, EGNOS, GAGAN, MSAS) ranging . . Ultra-High Sensitivity: -165dBm ●    Automatic antenna switching function ●   Antenna Advisor function Note 1:  SBAS can only be enabled when update rate is less than or equal to 5Hz. Note2:  Some features need special firmware or command programmed by customer.
1.3 System Block Diagram
1.4 Multi-tone active interference canceller
Because different application (Wi-Fi , GSM/GPRS,3G/4G,Bluetooth )are integrated into navigation system , the harmonic of RF signal will influence the GPS reception , The multi-tone active interference canceller (abbr: MTAIC ) can reject external RF interference which come  from other active components on the main board , to improve the capacity of GPS reception without any needed HW change in the design .CD-PA1616D can cancel up to  12  independent channel interference continuous wave (CW).
1.5 1PPS
A pulse per second (1 PPS) is an electrical signal which precisely indicates the start of a second with the accuracy of ±20ns RMS (Root Mean Square). The PPS signal is provided through a designated output pin for many external applications. The pulse is not only limited to being active every second but is also allowed to set up the required duration, frequency, and active high/low through a programmable user- defined setting.
1.6 AGPS Support for Fast TTFF (EPO™)
The AGPS (EPO™) supply the predicated Extended Prediction Orbit data to speed TTFF  ,users can download the EPO data to GPS engine from the FTP server  by internet or wireless network ,the GPS engine will  use the EPO data to assist position calculation when the navigation information of satellites are not enough or weak signal zone .
1.7 AlwaysLocate™ (Advance Power Periodic Mode)
Embedded need to be executed fully all the time, the algorithm can be set by different necessary to decide the operation level of GPS function, reduce power consumption,  it will suffer positing accuracy to get the target of power saving and extend the usage time of product.
1.8 EASY™
The EASY™ is embedded assist system for quick positioning, the GPS engine will calculate and predict automatically the single ephemeris ( Max. up to 3 days )when power on, and save the predict  information into the memory , GPS engine will use these information for positioning if no enough information from satellites, so the function will be helpful for positioning and TTFF improvement under  indoor or urban condition, the Backup power (VBACKUP) is necessary. Please refer to the Fig 1-3, When GPS device great the satellite information from GPS satellites, the GPS engine automatically pre-calculate the predict orbit information for 3 days. The GPS device still can quickly do the positioning with EASY™ function under weak GPS signal.
1.9 Embedded Logger function(LOCUS)
The  Embedded Logger function(LOCUS)  don't need host CPU (MCU ) and external flash  to handle the operation , GPS Engine will use internal flash (embedded in GPS chipset ) to log the GPS data (Data format : UTC, Latitude , longitude, Valid ,Checksum ), the maximum log duration is up to two days under AlwaysLocate™.
2.1 Mechanical Dimension Dimension: (Unit: mm, Tolerance: +/- 0.2mm)
(Unit: mm, Tolerance: 0.1mm)
2.3 Pin Configuration
2.4 Pin Assignment

2.5 Description of I/O Pin
Pin1, (VCC)
The main DC power supply of the module, the voltage should be kept between from 3.0V to 4.3V. The Vcc ripple must be controlled under 50mVpp (Typical: 3.3V)
Pin2, (NRESET)
With a low level, it causes the module to reset. If not used, keep floating. Pin3, 8, 12, 19, (GND) Ground1
Pin4, (VBACKUP)
This connects to the backup power of the GPS module. Power source (such as battery) connected to this pin will help the GPS chipset in keeping its internal RTC running when the main power source is removed. The voltage should be kept between 2.0V~4.3V, Typical 3.0V. If VBACKUP power was not reserved, the GPS module will perform a lengthy cold start every time it is powered-on because previous satellite information is not retained and needs to be re- transmitted. If not used, keep floating.
Pin5, (3D-FIX)
The 3D  FIX is assigned as a fix flag output. The timing behavior of this pin can be configured by custom firmware for different applications (Example: waking up host MCU). If not used, keep floating. ■ Before 2D Fix The pin should continuously output one-second high-level with one-second low-level signal ■ After 2D or 3D Fix The pin should continuously output low-level signal Low
Pin6, 7, 17, 18, 20, (NC)
This pin is not connected, keep floating.
Pin9, (TX)
This is the UART transmitter of the module. It is used for aiding. If not used, keep floating.
Pin10, (RX)
This is the UART receiver of the module. It is used for aiding. If not used, keep floating.
Pin11, (EX_ANT)
DC power from VCC and provide for external active antenna (Recommendation: 3.3V). When a 4mA or higher current is detected, the detect circuit will acknowledge the external antenna as being present and uses external antenna for reception. In the event of short circuit occurring at external antenna, the module will limit the drawn current to a safe level. The 3.0V for the GNSS external antenna is limited to 25mA. The 3.3V for the GNSS external antenna is limited to 28mA. The 3.6V for the GNSS external antenna is limited to 31mA.
Pin13, (1PPS)
This pin provides one pulse-per-second output from the module and synchronizes to GPS time. Keep floating if not used.
Pin14, (RX1)
This is the UART1 recevicer of the module. It is used for aiding. If not used, keep floating. Pin15, (TX1) This is the UART1 transmitter of the module. It is used for aiding. If not used, keep floating.

2.7 Absolute Maximum Ratings
The voltage applied for VCC should not exceed 4.3VDC.

2.9 GPS/GLONASS External Antenna Specification(Recommended)
It is important that the antenna gets a clear view of the sky and is positioned on a surface level to the horizon for best results. The following specification has to meet for the use reference design.

3.1NMEA Output Sentences
Table-1 lists each of the NMEA output sentences specifically developed and defined by MTK for use within MTK products
Note: GP is a short term of “GPS”; GL is “GLONASS”; GA is “Galileo” and GN is “multi-system”
Table-3 contains the values for the following example  : $GNGGA,165006.000,2241.9107,N,12017.2383,E,1,14,0.79,22.6,M,18.5,M,,*42
When inputting the command $PMTK353,1,0,0,0*2A, $GNGGA will change to $GPGGA (For GPS)
Table-5 contains the values for the following example  : $GPGSA,A,3,17,19,11,30,01,28,08,22,07,,,,1.31,0.79,1.04*03 $GLGSA,A,3,75,70,76,85,87,,,,,,,,1.31,0.79,1.04*10
Table-8 contains the values for the following example  : $GPGSV,3,1,12,01,61,025,44,30,49,248,30,11,48,026,48,28,45,336,45*72 $GPGSV,3,2,12,22,41,101,20,07,41,208,35,03,39,132,24,17,24,292,46*76 $GPGSV,3,3,12,40,22,255,,08,20,062,41,19,07,276,41,193,,,*75
Table-9 contains the values for the following example  : $GLGSV,3,1,10,76,74,276,33,75,43,170,32,86,39,359,21,87,33,283,42*6D $GLGSV,3,2,10,77,20,330,,71,15,103,,70,07,056,35,72,06,150,*65 $GLGSV,3,3,10,85,05,043,32,88,01,249,*64
Table-10 contains the values for the following example  : $GNRMC,064951.000,A,2307.1256,N,12016.4438,E,0.03,165.48,260406,3.05,W,A*2C
When inputting the commend $PMTK353,1,0,0,0*2A : $GNRMC will change to $GPRMC (for GPS).
Table-10 contains the values for the following example:
inputting the commend $PMTK353,1,0,0,0*2A : $GNVTG will change to $GPVTG (For GPS).
3.2 Antenna Status Command Protocols(Antenna Advisor)
PCD—Status of antenna Table-10 contains the values for the following list: $PCD,11,value*checksum Example: $PCD,11,1 *66 $PCD,11,2 *65 Value: 1=> Using Internal Antenna 2=> Using Active Antenna 3=> Active Antenna Shorted $PCD,11,3 *64
Enable Antenna Status command: $CDCMD,33,1*7C Disable Antenna Status command: $CDCMD,33,0*7D
3.3 MTK NMEA Command Protocols
Packet Type: 103 PMTK_CMD_COLD_START Packet Meaning: Cold Start  :  Don't use Time, Position, Almanacs and Ephemeris data at re-start. Example: $PMTK103*30<CR><LF>
This chapter introduces the reference schematic design for the best performance. Additional tips and cautions on design are well documented on Application Note, which is available upon request.
Note:
1. Ferrite bead L1 is added for power noise reduction. 2. C1 and C2 bypass should be put near the module. Damping resistors R2,R3,R4 could be modified based on system application for EMI. 3. 4. If you need more support and information on antenna implementation, please directly contact us at sales@cdtop-tech.com  for further services.
4.1 Reference Design Circuit
Cautionary Notes on Reflow-Soldering Process:
1. Module must be pre-baked before going through SMT solder reflow process. 2. The usage of solder paste should follow “First-in-First out” principle. Opened solder paste needs to be monitored and recorded in a timely manner (refer to IPQC standards for related documentation and examples). 3. Temperature and humidity must be controlled within SMT production line and storage area. Temperature of 23°C, 60±5% RH humidity is recommended. (please refer to IPQC standards for related documentation and examples) 4. When performing solder paste printing, please notice if the amount of solder paste is in excess or insufficient, as both conditions may lead to defects such as electrical shortage, empty solder and etc. 5. Make sure the vacuum mouthpiece is able to bear the weight of the GNSS module to prevent positional shift during the loading process. Before the PCBA is going through the reflow-soldering process, the operators should check with 6. his/her own eyes to see if there are positional offset to the module. 7. The reflow temperature and its profile data must be measured before the SMT process and match the levels and guidelines set by IPQC. If SMT protection line is running a double-sided process for PCBA, please process GNSS module during the 8. second pass only to avoid repeated reflow exposures of the GNSS module. Please contact CDTop beforehand if you must process GNSS module during the 1 st pass of double-side process.
One Reel : 250pcs
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