BK4819 BEKEN | Alldatasheet
Document overview
- Manufacturer or author: Provided By alldatasheet.com(free datasheet download site)
- PDF pages: 22
Technical content
Features
World wide band: 18 MHz ~ 660 MHz,
840 MHz ~1300 MHz
12.5/25/6.25/20 kHz channel spacing On chip 7 dBm RF PA 2.6 V to 3.6 V power supply CTCSS tone receiver with tail CTCSS frequency detector 23/24 bit programmable DCS code Standard DTMF and programmable in-band dual tone SELCALL and programmable in-band single tone FSK data modem Frequency inversion scrambler Voice activated switch (VOX) RF Signal strength measurement TX Audio signal strength indication and RX audio signal strength indication 3-wires interface with MCU with maximum 8 Mbps clock rate QFN 4x4 32-Pin package
Applications
Personal Radio Service Baby Monitor Toys General Description The BK4819 is a half duplex TDD FM transceiver operating within 18 MHz ~ 660 MHz, 840 MHz ~1300 MHz band range for worldwide personal radio. Besides speech communication, the BK4819 on-chip FSK data modem supports F2D and F1W emission to be used in both FRS and DPMR band for text message and GPS information exchange. The BK4819 is a complete, small form factor solution optimized for low-power, low-cost, and highly integrated mobile and portable consumer electronic devices, requiring only a few external decoupling capacitors and an external inductor for input matching. QFN 20 Pin Assignments (Top View) Functional Block Diagram
1 Functional Description
Figure 1. Functional Block Diagram
1.1 Overview
tone generator and detector enable a secure link and digital signaling.
1.2 RF Transceiver
3) Several SMD capacitors for decoupling and DC blocking.
1.2.1 FM Receiver
implemented in order to eliminate the external SAW filters. automatically adjust the gain of LNA and the gain of VGA. Figure 2. Radio Block Diagram
1.2.2 FM Transmitter
through 3-wire SPI interface.
1.2.3 RF Frequency Synthesizer
synthesizer is shown in Figure 2. In RX mode, the RF frequency synthesizer generates unmodulated LO signal. the RF frequency synthesizer. In RX mode, the locked frequency of the synthesizer is equal to Ndiv x (fwanted-fIF). While in TX mode, the locked frequency of the synthesizer is equal to Ndiv x fwanted. synthesizer takes less than 0.3m sec to settle. should be within 2.5ppm to keep a reliable communication.
1.2.4 Input/output Matching
matching is shown in Figure 3. Figure 3. Schematic of Input/Output matching L1 is used for impedance transformation. The recommended value of L1 is NC. As for output matching, capacitor C2 is used for DC-blocking, too.
1.2.5 Crystal Oscillator
BK4819 integrates a low-power amplitude-regulated 26MHz crystal oscillator. 26MHz crystal oscillator is shown in Figure 4. Figure 4. Circuit Diagram of the 26MHz Crystal Oscillator input capacitance. The value of Cpar is about 1pF.
1.2.6 Power Supply Decoupling
are very important to achieve the best performance in an application.
1.3 SPI Interface
while SDATA is bi-direction pin. Figure 5. Three-wires Interface Timing
2 Electrical Specifications
2.1 Absolute Maximum Ratings
absolute maximum ratings for BK4819. Table 1. Absolute Maximum Ratings
2.2 Recommended Operating Conditions
within. The operating conditions for BK4819 are defined in Table 2. Table 2. Recommended Operating Conditions
otherwise stated. Parameters are tested in production unless otherwise stated. For QFN4x4 24pin package, VDD range is 2.6-3.6V. frequency tolerance of the crystal should be within +/-2.5ppm during all operating conditions.
2.3 Power Consumption Specification
Table 3. Power Consumption Specification
2.4 Receiver Characteristics
Table 4. Receiver Characteristics
- 1st adjacent channel (12.5kHz)
- According to ETSI standard (EN 300 296-1 V1.4.1)
- 1kHz tone, 1.5kHz deviation
2.5 Transmitter Characteristics
Table 5. Transmitter Characteristics
- Depend on output matching and register settings
2.6 SPI Control Interface Characteristics
Table 6. SPI Control Interface Characteristics Parameter Symbol Min. Typ. Max. Figure 6. 3-Wire Control Interface Write Timing Diagram Figure 7. 3-Wire Control Interface Read Timing Diagram
3 Pin Assignment
Figure 8. BK4819 Pin Assignment (Top View) Table 7. BK4819 4mmx4mm 20-Pin Definition
1 GPIO5 I/O General purpose input/output - there is internal pull-down on this
2 GPIO6 I/O General purpose input/output - there is internal pull-down on this
4 XO Output Crystal oscillator port, output
5 XI Input Crystal oscillator port, input
6 NC 7 NC 8 EARO Output Earpiece output
13 MICN Input Microphone input, negative
14 MICP Input Microphone output, positive
15 LNAIN Input Input of low noise amplifier
16 NC 17 PAOUT Output Output of power amplifier
18 VRAM
19 NC 20 NC 21 NC 22 NC 23 NC 24 NC 25 SCK Input SPI clock
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26 SCN Input SPI enable
27 SDATA I/O SPI data
28 GPIO0 I/O General purpose input/output - there is internal pull-down on this
port.
29 GPIO1 I/O General purpose input/output - there is internal pull-down on this
port.
30 GPIO2 I/O General purpose input/output - there is internal pull-down on this
port.
31 GPIO3 I/O General purpose input/output - there is internal pull-down on this
port.
32 GPIO4 I/O General purpose input/output - there is internal pull-down on this
port.
4 Typical Application Schematic
Figure 9. BK4819 Application
5 Package Information
Figure 10. QFN 4x4 32 Pin Package diagram
Table 8. QFN 4x4 32 Pin Package dimensions
- Calculated shelf life in vacuum sealed bag 12 months at<40℃ and 90% relative
- Peak package body temperature 260℃.
- After vacuum sealed bag is opened ,devices that will be subjected to reflow solder or
a) Mounted within 168 hours of factory conditions<40℃/60%.
6 Tape and Reel Information
All dimensions are in millimeters by default.
6.1 Tape Information
The figure below shows the dimensions of the tape for the BK4819 QFN. Figure 11. Tape Dimensions
- 10 sprocket hole pitch cumulative
- Camber in compliance with EIA 481.
- Pocket position relative to sprocket
6.2 Cover Information
Figure 12. Cover Dimensions
- Reel to contain 300 meters of splice free material.
- Material: Polyester film with antistatic coating and adhesive coating.
- Color: Transparent, natural
6.3 Reel Information
Figure 13. Reel Dimensions
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7 Solder Reflow Profile
Timet 25C to Peak TemperatureTs(min)Ts(max)TLTPTP(min)TP(max)tSPreheattLtPRamp UpRamp DownCritical ZonetLto tP Fi gure 14. Classification Reflow Profile Profile Feature Specification Average Ramp-Up Rate (tsmax to tp) 3°C/second max. Pre_heat Temperature Min (Tsmin) 150°C Temperature Max (Tsmax) 200°C Time (ts) 60-180 seconds Time Maintained above Temperature (TL) 217°C Time (tL) 60-150 seconds Peak/Classification Temperature (Tp) 260°C Time within 5°C of Actual Peak Temperature (tp) 20-40 seconds Ramp-Down Rate 6 6°C/second max. Time 25°C to Peak Temperature 8 8 minutes max. RoHS Compliant The product does not contain lead, mercury, cadmium, hexavalent chromium, PBB&PBDE content in accordance with directive 2002/95/EC(RoHS). ESD Sensitivity Integrated circuits are ESD sensitive and can be damaged by static electricity. Proper ESD techniques should be used when handling these devices.
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8 Order Information
Part number Package Packing MOQ (ea) BK4819 QFN Tape Reel 3 k Remark: MOQ: Minimum Order Quantity
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9 Additional Reference Resources
Application Notes Register Table Schematic & Layout
Proprietary and Confidential Page 21 of 22 Version Change Summary Date Author Rev.1.0 Initial Release 2020/8/18 Rev.1.1 Rev.1.2 Rev.1.3
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11 Contact Information
Beken Corporation Technical Support Center Website: www.bekencorp.com Email: info@bekencorp.com Shanghai Headquarters: Building 41, Capital of Tech Leaders, 1387 Zhangdong Road, Zhangjiang High-Tech Park, Pudong New District, Shanghai, China Phone: 86-21-51086811, 60871276 Fax: 86-21-60871277 Postal Code: 201203 Shenzhen Branch: Room 310, HKUST SZ IER Building, No. 9 Yuexing 1st Rd., Nanshan Hi-Tech Park, Shenzhen, China Phone: 86-755-2655 1063 Postal Code: 518057 Taipei Branch: Taipei City, Taiwan Phone: 886-2-26275780