SI4355 SILABS [Silicon Laboratories], SI4355 Datasheet
SI4355
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SI4355 Summary of contents
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... The compact 3x3 mm package size combined with a low external BOM count makes the Si4355 both space efficient and cost effective. Excellent sensitivity of 116 dBm allows for a longer operating range, while the low current consumption active and 50 nA standby, provides for superior battery life ...
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... Si4355 Functional Block Diagram GPIO3 Synthesizer SDN Rx Chain RXp LNA RXn VDD 2 GPIO2 PGA ADC Rx Modem Battery Voltage Aux ADC Sensor Rev 1.0 XIN XOUT 25-32MHz XO nSEL SDI SDO SCLK nIRQ GPIO1 GPIO0 ...
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... Application Programming Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 5.4. Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 5.5. GPIO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 6. Data Handling and Packet Handler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26 6.1. RX FIFO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 6.2. Packet Handler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 7. Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 8. Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 9. Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 10. PCB Land Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 11. Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33 11.1. Si4355 Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 11.2. Top Marking Explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34 Rev 1.0 Si4355 Page 3 ...
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... Si4355 1. Electrical Specifications Table 1. Recommended Operating Conditions Parameter Symbol Ambient Temperature Supply Voltage I/O Drive Voltage V 1 Table 2. DC Characteristics Parameter Symbol Supply Voltage V DD Range Power Saving Modes RC oscillator, main digital regulator, and low power I Shutdown I Standby I Ready I SPI Active TUNE Mode Current ...
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... Rx BW (BER < 0.1%) (128 kbps, GFSK 0.5, f = 70 kHz 305 kHz Rx BW BER < 0.1%, 1 kbps, 185 kHz Rx BW, OOK, PN15 data BER < 0.1%, 40 kbps, 185 kHz Rx BW, OOK, PN15 data Rev 1.0 Si4355 Min Typ Max Units 283 — 350 MHz 425 — ...
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... Si4355 Table 4. Receiver AC Electrical Characteristics Parameter Symbol BER Variation vs Power P RX_RES 2 Level RSSI Resolution RES RSSI 1-Ch Offset Selectivity 2 C/I 1-CH 2-Ch Offset Selectivity 2 C/I 2-CH Blocking 200 kHz–1 MHz 200K BLOCK 2 1M Blocking 1 MHz Offset BLOCK 2 8M Blocking 8 MHz Offset BLOCK 2 Im Image Rejection ...
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... OHL I DRV<1:0> OHH I DRV<1:0> OLL I DRV<1:0> OLH I DRV<1:0> OHL I DRV<1:0> OHH 500 µA OH OUT 500 µA OL OUT = 2.7 VDC and V OH Rev 1.0 Si4355 1 Min Typ Max Units — 2.3 — ns — 2 — ns — 2 — 0.7 — — — — 0 – ...
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... Si4355 Table 7. Thermal Characteristics Parameter Thermal Resistance Junction to Ambient Junction Temperature Table 8. Absolute Maximum Ratings V to GND DD Voltage on Digital Control Inputs Voltage on Analog Inputs RX Input Power Operating Ambient Temperature Range T Storage Temperature Range T STG Note: Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only and functional operation of the device at or beyond these ratings in the operational sections of the specifications is not implied ...
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... External reference signal (XIN) = 1.0 V Production test schematic (unless noted otherwise) All RF input and output levels referred to the pins of the Si4355 (not the RF module) Qualification Test Conditions: –40 to +85 °C (typical = 25 °C) A ...
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... Si4355 2. Typical Applications Circuit VDD Figure 1. Si4355 Applications Circuit 10 30 MHz GND SDI 1 15 SDN SDO 2 14 SCLK RXp Si4355 3 13 RXn nIRQ GPIO1 100 p 100 n 1u Rev 1.0 SDN GP1 GP2 GP3 GP4 GP5 ...
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... Additional system features, such as 64 byte Rx FIFO, preamble detection, sync word detector and CRC, reduce overall current consumption, and allow for the use of lower-cost system MCUs. Power-on-reset (POR), and GPIOs further reduce overall system cost and size. The Si4355 is designed to work with an MCU, crystal, and a few passives to create a very compact and low-cost system. ...
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... A cyclic redundancy check (CRC) is used to detect the presence of erroneous bits in each packet. A CRC is computed and appended at the end of each transmitted packet and verified by the Si4355 receiver to confirm that no errors have occurred. The packet handler and CRC can significantly reduce the load on the system microcontroller allowing for a simpler and cheaper microcontroller ...
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... CHANNEL is 0 and so will be set to the base frequency if this argument is never used. 3.5. Crystal Oscillator The Si4355 includes an integrated crystal oscillator with a fast start-up time of less than 250 µs. The design is differential with the required crystal load capacitance integrated on-chip to minimize the number of external components ...
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... Figure 3. Capacitor Bank Frequency Offset Characteristics 3.6. Battery Voltage and Auxiliary ADC The Si4355 contains an integrated auxiliary 11-bit ADC used for the internal battery voltage detector or an external component via GPIO. The Effective Number of Bits (ENOB bits. When measuring external components, the input voltage range and the conversion rate is between 300 ...
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... Input Method Manual Fast Select Create Custom Configuration Configuration from Table Select Freq, Power, and Packet Handler Features Select Action Write New Code Run Sample Code Add new Open IDE with configuration to configuration sample code and array preloaded load on board Rev 1.0 Si4355 15 ...
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... Gaussian filter, limiting its spectral width result, the out of band components of the signal are reduced. The Si4355 also has an option for Manchester coding. This method provides a state transition at each bit and so allows for more reliable clock recovery. ...
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... The Si4355 allows the preamble length to be set between 3 to 255 bytes in length with a default length of 4 bytes. The preamble pattern for the Si4355 will always be 55h with a first bit of "0" if the packet handler capability is used. ...
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... Si4355 4.3. Configuration Commands The EZConfig Setup provides all of the code needed for basic radio configuration. Once the setup is completed in the GUI, the program outputs configuration array(s) that can be sent to the radio via the SPI interface. No additional setup coding is needed. The configuration command process is shown in Figure 6. The EZCONFIG_SETUP passes the configuration array to the device and the EZCONFIG_CHECK insures that all of the configuration data was written correctly ...
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... API Command SCLK The Si4355 contains an internal MCU which controls all the internal functions of the radio. For SPI read commands, a typical communication flow of checking clear-to-send (CTS) is used to make sure the internal MCU has executed the command and prepared the data to be output over the SDO pin. Figure 8 demonstrates the general flow of an SPI read command. Once the CTS value reads FFh, the read data is ready to be clocked out to the host MCU. The typical time for a valid FFh CTS reading is 20 µ ...
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... Si4355 Send Command nSEL SDO SDI ReadCmdBuff SCLK Figure 8. SPI Read Command—Check CTS Value nSEL SDO Response Byte 0 SDI SCLK Figure 9. SPI Read Command—Clock Out Read Data 20 Read CTS CTS Value 0x00 Rev 1.0 0xFF Retrieve Response CTS Response Byte n ...
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... Operating Modes and Timing The primary states of the Si4355 are shown in Figure 10. The shutdown state completely shuts down the radio, minimizing current consumption and is controlled using the SDN (pin 2). All other states are controlled using the API commands START_RX and CHANGE_STATE. Table 11 shows each of the operating modes with the time required to reach either RX state as well as the current consumption of each state ...
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... Si4355 5.2.1. Shutdown State The shutdown state is the lowest current consumption state of the device and is entered by driving SDN (Pin 2) high. In this state, all register contents are lost and there is no SPI access. To exit this mode, drive SDN low. The device will then initiate a power on reset (POR) along with internal calibrations. Once this POR period is complete, the POWER_UP command is required to initialize the radio and the configuration can then be loaded into the device. The SDN pin must be held high for at least 10 µ ...
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... LDOs, start up the crystal oscillator, enable PLL, calibrate VCO, enable receiver circuits, and enable receive mode. The device will also automatically set up all receiver features such as packet handling based upon the initial configuration of the device. Table 12. POR Timing Description Rev 1.0 Si4355 Min Typ Max Units 10 ...
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... Si4355 5.3. Application Programming Interface An Application Programming Interface (API) is embedded inside the device and is used for communications with the host MCU. API commands are used to configure the device, control the chip during operation, and retrieve its status. Available commands are shown in Table 13. The complete list of commands and their descriptions are provided in application note, “ ...
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... Interrupts The Si4355 is capable of generating an interrupt signal when certain events occur. The chip notifies the microcontroller that an interrupt event has occurred by setting the nIRQ output pin LOW = 0. This interrupt signal will be generated when any one (or more) of the interrupt events occur. The nIRQ pin will remain low until the microcontroller reads the Interrupt Status Registers ...
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... A 64-byte RX FIFO is integrated into the chip. Reading from command register 77h reads data from this RX FIFO. 6.2. Packet Handler The Si4355 includes integrated packet handler features such as preamble and sync word detection as well as CRC calculation. This allows the chip to qualify and synchronize with legitimate transmissions independent of the microcontroller ...
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... V) – SDN = 1, part will be in shutdown mode and contents DD V)—Provides serial data clock for 4-line serial data DD V)— Provides serial data readback function of DD V)—Serial data stream input for 4-line serial data bus DD Rev 1.0 Si4355 nSEL SDI SDO SCLK nIRQ GPIO1 27 ...
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... Si4355 Pin Pin Name I/O Serial Interface Select Input (0 – nSEL I 4-line serial data bus Crystal Oscillator Output 17 XOUT O Crystal Oscillator Input—No DC bias required, but if used, should be set XIN I General Purpose Digital I/O 19 GPIO2 I/O General Purpose Digital I/O 20 GPIO3 I/O 28 Description V) – ...
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... Ordering Information * Part Number Si4355-B1A-FM *Note: Add an “R” at the end of the device part number to denote tape and reel option. Description EZRadio Receiver Rev 1.0 Si4355 Package Type Operating Temperature 3x3 QFN-20 – °C Pb-free 29 ...
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... Si4355 9. Package Outline 30 Figure 14. 20-pin QFN Package Rev 1.0 ...
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... Table 15. Package Diagram Dimensions Dimension Min A 0. 0. 0.30 aaa bbb ccc ddd eee fff Note: All dimensions shown are in millimeters (mm) unless otherwise noted. Rev 1.0 Nom Max 0.85 0.90 0.02 0.05 0.20 REF 0.25 0.30 0.30 0.35 3.00 BSC. 1.70 1.85 0.50 BSC. 3.00 BSC. 1.70 1.85 2.40 BSC. 0.40 0.50 0.15 0.10 0.10 0.05 0.08 0.10 Si4355 31 ...
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... Si4355 10. PCB Land Pattern Figure 15. 20-pin QFN PCB Land Pattern Table 16. PCB Land Pattern Dimensions Dimension Note: : All dimensions shown are in millimeters (mm) unless otherwise noted. 32 Min Max 3.00 3.00 0.50 REF 0.25 0.35 1.65 1.75 0.85 0.95 1.65 1.75 0.37 0.47 2.40 REF 0.25 0.35 Rev 1.0 ...
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... Line 2 Marking: Die Revision TTTT = Trace Code Line 3 Marking: Circle = 0.5 mm Diameter (Bottom-Left Justified Year WW = Workweek Figure 16. Si4355 Top Marking 4355A Internal tracking number Assigned by the Assembly House. Corresponds to the last significant digit of the year and work week of the mold date. Rev 1.0 Si4355 33 ...
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... Si4355 C I ONTACT NFORMATION Silicon Laboratories Inc. 400 West Cesar Chavez Austin, TX 78701 Tel: 1+(512) 416-8500 Fax: 1+(512) 416-9669 Toll Free: 1+(877) 444-3032 Please visit the Silicon Labs Technical Support web page: https://www.silabs.com/support/pages/contacttechnicalsupport.aspx and register to submit a technical support request. The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without notice. ...