SI4461
TransceiverThe SI4461 is a transceiver from Silicon Laboratories. View the full SI4461 datasheet below including electrical characteristics.
Manufacturer
Silicon Laboratories
Category
Transceiver
Overview
Part: Si4463/61/60-C — Silicon Laboratories
Type: High-Performance, Low-Current Transceiver
Description: The Si446x devices are high-performance, low-current transceivers covering sub-GHz frequency bands from 142 to 1050 MHz, offering outstanding sensitivity of -129 dBm and up to +20 dBm output power (Si4463) with extremely low active and standby current consumption.
Operating Conditions:
- Supply voltage: 1.8 to 3.8 V
- Operating temperature: -40 to +85 °C
- Frequency range: 142-1050 MHz
- Data rate: 100 bps to 1 Mbps
Key Specs:
- Receive sensitivity: -129 dBm (500 bps, GFSK, 169 MHz)
- Max output power (Si4463): +20 dBm
- TX current (Si4463): 88 mA (+20 dBm, Class-E match, 915 MHz, 3.3 V)
- RX current (High Performance Mode): 13.7 mA (915 MHz, 40 kbps)
- Shutdown current: 30 nA
- Synthesizer frequency range: 142-1050 MHz
- Adjacent channel selectivity: -69 dB (169 MHz, 12.5 kHz channel spacing)
- Blocking (1 MHz offset): -79 dB
Features:
- (G)FSK, 4(G)FSK, (G)MSK, OOK modulation
- PA support for +27 or +30 dBm
- Ultra low current powerdown modes (30 nA shutdown)
- Preamble sense mode
- Fast wake and hop times
- Excellent selectivity performance
- Antenna diversity and T/R switch control
- Highly configurable packet handler with 64 byte TX and RX FIFOs
- Auto frequency control (AFC) and Automatic gain control (AGC)
- Low battery detector and Temperature sensor
- IEEE 802.15.4g and WMBus compliant
Applications:
- Smart metering (802.15.4g and WMBus)
- Remote control
- Home security and alarm
- Telemetry
- Garage and gate openers
- Remote keyless entry
- Home automation
- Industrial control
- Sensor networks
- Health monitors
- Electronic shelf labels
Package:
- 20-Pin QFN package
Features
- Frequency range = 142-1050 MHz
- Receive sensitivity = -129 dBm
- Modulation
(G)FSK, 4(G)FSK, (G)MSK
- OOK
- Max output power
- +20 dBm (Si4463)
- +16 dBm (Si4461)
- +13 dBm (Si4460)
- PA support for +27 or +30 dBm
- Low active power consumption
- 10/13 mA RX
- 18 mA TX at +10 dBm (Si4460)
- Ultra low current powerdown modes
- 30 nA shutdown, 40 nA standby
- Preamble sense mode
- 6 mA average RX current at 1.2 kbps
- 10 μA average RX current at 50 kbps and 1 sec sleep interval
- Fast preamble detection
- 1 byte preamble detection
- Data rate = 100 bps to 1 Mbps
- Fast wake and hop times
- Power supply = 1.8 to 3.8 V
- Excellent selectivity performance
- 69 dB adjacent channel
- 79 dB blocking at 1 MHz
- Antenna diversity and T/R switch control
- Highly configurable packet handler
- TX and RX 64 byte FIFOs
- 129 bytes dedicated Tx or Rx
- Auto frequency control (AFC)
- Automatic gain control (AGC)
- Low BOM
- Low battery detector
- Temperature sensor
- 20-Pin QFN package
- IEEE 802.15.4g and WMBus compliant
- Suitable for FCC Part 90 Mask D, FCC part 15.247, 15,231, 15,249, ARIB T-108, T-96, T-67, RCR STD-30, China regulatory
- ETSI Category I Operation EN300 220
Applications
- Smart metering (802.15.4g and WMBus)
- Remote control
- Home security and alarm
- Telemetry
- Garage and gate openers
Pin Configuration
| Pin | Pin Name | I/0 | Description |
|---|---|---|---|
| 1 | SDN | I | Shutdown Input Pin . 0-VDD V digital input. SDN should be = 0 in all modes except Shutdown mode. When SDN = 1, the chip will be completely shut down, and the contents of the registers will be lost. |
| 2 | RXp | I | Differential RF Input Pins of the LNA. See application schematic for example matching network. |
| 3 | RXn | I | Differential RF Input Pins of the LNA. See application schematic for example matching network. |
| 4 | TX | O | Transmit Output Pin. The PA output is an open-drain connection, so the L-C match must supply VDD (+3.3 VDC nominal) to this pin. |
| 5 | NC | It is recommended to connect this pin to GND per the reference design sche- matic. Not connected internally to any circuitry. | |
| 6 | VDD | VDD | +1.8 to +3.8 V Supply Voltage Input to Internal Regulators. The recommended VDD supply voltage is +3.3 V. |
| 7 | TXRAMP | O | Programmable Bias Output with Ramp Capability for External FET PA. See "5.4. Transmitter (TX)" on page 33. |
| 8 | VDD | VDD | +1.8 to +3.8 V Supply Voltage Input to Internal Regulators. The recommended VDD supply voltage is +3.3 V. |
| 9 | GPIO0 | I/O | General Purpose Digital I/O. |
| 10 | GPIO1 | I/O | May be configured through the registers to perform various functions including: Microcontroller Clock Output, FIFO status, POR, Wake-Up timer, Low Battery Detect, TRSW, AntDiversity control, etc. |
| 11 | nIRQ | O | General Microcontroller Interrupt Status Output. When the Si4463/61 exhibits any one of the interrupt events, the nIRQ pin will be set low = 0. The Microcontroller can then determine the state of the inter- rupt by reading the interrupt status. No external resistor pull-up is required, but it may be desirable if multiple interrupt lines are connected. |
| Pin | Pin Name | I/0 | Description |
| 12 | SCLK | I | Serial Clock Input. 0-VDD V digital input. This pin provides the serial data clock function for the 4-line serial data bus. Data is clocked into the Si4463/61 on positive edge tran- sitions. |
| 13 | SDO | O | 0-VDD V Digital Output. Provides a serial readback function of the internal control registers. |
| 14 | SDI | I | Serial Data Input. 0-VDD V digital input. This pin provides the serial data stream for the 4-line serial data bus. |
| 15 | nSEL | I | Serial Interface Select Input. 0-VDD V digital input. This pin provides the Select/Enable function for the 4-line serial data bus. |
| 16 | XOUT | O | Crystal Oscillator Output. Connect to an external 25 to 32 MHz crystal, or leave floating when driving with an external source on XIN. |
| 17 | XIN | I | Crystal Oscillator Input. Connect to an external 25 to 32 MHz crystal, or connect to an external source. |
| 18 | GND | GND | When using an XTAL, leave floating per the reference design schematic. When using a TCXO, connect to TCXO GND, which should be separate from the board's reference ground plane. |
| 19 | GPIO2 | I/O | General Purpose Digital I/O. |
| 20 | GPIO3 | I/O | May be configured through the registers to perform various functions, including Microcontroller Clock Output, FIFO status, POR, Wake-Up timer, Low Battery Detect, TRSW, AntDiversity control, etc. |
| PKG | PADDLE_GND | GND | The exposed metal paddle on the bottom of the Si446x supplies the RF and cir- cuit ground(s) for the entire chip. It is very important that a good solder connec- tion is made between this exposed metal paddle and the ground plane of the PCB underlying the Si446x. |
Electrical Characteristics
Table 1. DC Characteristics 1
| Parameter | Symbol | Test Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Supply Voltage Range | V DD | 1.8 | 3.3 | 3.8 | V | |
| Power Saving Modes | I Shutdown | RC Oscillator, Main Digital Regulator, and Low Power Digital Regulator OFF | - | 30 | 1300 | nA |
| Power Saving Modes | I Standby | Register values maintained and RC oscillator/WUT OFF | - | 40 | 2900 | nA |
| Power Saving Modes | I SleepRC | RC Oscillator/WUT ON and all register values main- tained, and all other blocks OFF | - | 740 | 3800 | nA |
| Power Saving Modes | I SleepXO | Sleep current using an external 32 kHz crystal | - | 1.7 | - | μA |
| Power Saving Modes | I Sensor -LBD | Low battery detector ON, register values maintained, and all other blocks OFF | - | 1 | - | μA |
| Power Saving Modes | I Ready | Crystal Oscillator and Main Digital Regulator ON, all other blocks OFF | - | 1.8 | - | mA |
| Preamble Sense Mode Current | I psm | Duty cycling during preamble search, 1.2 kbps, 4 byte preamble | - | 6 | - | mA |
| Preamble Sense Mode Current | I psm | Fixed 1 s wakeup interval, 50 kbps, 5 byte preamble | - | 10 | - | μA |
| TUNE Mode Current | I Tune_RX | RX Tune, High Performance Mode | - | 7.6 | - | mA |
| TUNE Mode Current | I Tune_TX | TX Tune, High Performance Mode | - | 7.8 | - | mA |
| RX Mode Current | I RXH | High Performance Mode (measured at 915 MHz and 40 kbps data rate) | - | 13.7 | 22 | mA |
| RX Mode Current | I RXL | Low Power Mode (measured at 315 MHz and 40 kbps data rate) | - | 10.9 | - | mA |
| TX Mode Current (Si4463) | I TX_+20 | +20 dBm output power, Class-E match, 915 MHz, 3.3 V | - | 88 | 108 | mA |
| TX Mode Current (Si4463) | +20 dBm output power, square-wave match, 169 MHz, 3.3 V | - | 68.5 | 80 | mA | |
| TX Mode Current (Si4463) | +13 dBm output power, Class-E match, 915 MHz, 3.3 V | - | 44.5 | 60 | mA | |
| TX Mode Current (Si4460) | I TX_+10 | +10 dBm output power, Class-E match, 915/868 MHz, 3.3 V 2 | - | 19.7 | - | mA |
| TX Mode Current (Si4460) | I TX_+10 | +10 dBm output power, Class-E match, 169 MHz, 3.3 V 2 | - | 18 | - | mA |
| TX Mode Current (Si4460) | I TX_+13 | +13 dBm output power, Class-E match, 915/868 MHz, 3.3 V | - | 24 | - | mA |
| TX Mode Current (Si4461) | I TX_+16 | +16 dBm output power, class-E match, 868 MHz, 3.3 V | - | 43 | 55 | mA |
| TX Mode Current (Si4461) | I TX_+13 | +13 dBm output power, switched-current match, 868 MHz, 3.3 V | - | 33.5 | 40 | mA |
Notes:
-
All minimum and maximum values are guaranteed across the recommended operating conditions of supply voltage and from -40 to +85 °C unless otherwise stated. All typical values apply at VDD = 3.3 V and 25 °C unless otherwise stated.
-
Measured on direct-tie RF evaluation board.
Table 2. Synthesizer AC Electrical Characteristics
| Parameter | Symbol | Test Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Synthesizer Frequency Range | F SYN | 850 | - | 1050 | MHz | |
| Synthesizer Frequency Range | 350 | - | 525 | MHz | ||
| Synthesizer Frequency Range | 284 | - | 350 | MHz | ||
| Synthesizer Frequency Range | 142 | - | 175 | MHz | ||
| Synthesizer Frequency Resolution | F RES-960 | 850-1050 MHz | - | 28.6 | - | Hz |
| Synthesizer Frequency Resolution | F RES-525 | 420-525 MHz | - | 14.3 | - | Hz |
| Synthesizer Frequency Resolution | F RES-420 | 350-420 MHz | - | 11.4 | - | Hz |
| Synthesizer Frequency Resolution | F RES-350 | 283-350 MHz | - | 9.5 | - | Hz |
| Synthesizer Frequency Resolution | F RES-175 | 142-175 MHz | - | 4.7 | - | Hz |
| Synthesizer Settling Time | t LOCK | Measured from exiting Ready mode with XOSC running to any frequency. Including VCO Calibration. | - | 50 | - | μs |
| Phase Noise | L (f M ) | F = 10 kHz, 169 MHz, High Perf Mode | - | -117 | -108 | dBc/Hz |
| Phase Noise | F = 100 kHz, 169 MHz, High Perf Mode | - | -120 | -115 | dBc/Hz | |
| Phase Noise | F = 1 MHz, 169 MHz, High Perf Mode | - | -138 | -135 | dBc/Hz | |
| Phase Noise | F = 10 MHz, 169 MHz, High Perf Mode | - | -148 | -143 | dBc/Hz | |
| Phase Noise | F = 10 kHz, 915 MHz, High Perf Mode | - | -102 | -94 | dBc/Hz | |
| Phase Noise | F = 100 kHz, 915 MHz, High Perf Mode | - | -105 | -97 | dBc/Hz | |
| Phase Noise | F = 1 MHz, 915 MHz, High Perf Mode | - | -125 | -122 | dBc/Hz | |
| Phase Noise | F = 10 MHz, 915 MHz, High Perf Mode | - | -138 | -135 | dBc/Hz | |
| Note: All minimum and maximum values are guaranteed across the recommended operating conditions of supply voltage and from -40 to +85 °C unless otherwise stated. All typical values apply at VDD = 3.3 V and 25 °C unless otherwise stated. | Note: All minimum and maximum values are guaranteed across the recommended operating conditions of supply voltage and from -40 to +85 °C unless otherwise stated. All typical values apply at VDD = 3.3 V and 25 °C unless otherwise stated. | Note: All minimum and maximum values are guaranteed across the recommended operating conditions of supply voltage and from -40 to +85 °C unless otherwise stated. All typical values apply at VDD = 3.3 V and 25 °C unless otherwise stated. | Note: All minimum and maximum values are guaranteed across the recommended operating conditions of supply voltage and from -40 to +85 °C unless otherwise stated. All typical values apply at VDD = 3.3 V and 25 °C unless otherwise stated. | Note: All minimum and maximum values are guaranteed across the recommended operating conditions of supply voltage and from -40 to +85 °C unless otherwise stated. All typical values apply at VDD = 3.3 V and 25 °C unless otherwise stated. | Note: All minimum and maximum values are guaranteed across the recommended operating conditions of supply voltage and from -40 to +85 °C unless otherwise stated. All typical values apply at VDD = 3.3 V and 25 °C unless otherwise stated. | Note: All minimum and maximum values are guaranteed across the recommended operating conditions of supply voltage and from -40 to +85 °C unless otherwise stated. All typical values apply at VDD = 3.3 V and 25 °C unless otherwise stated. |
Table 2. Synthesizer AC Electrical Characteristics
Table 3. Receiver AC Electrical Characteristics 1,2
| Parameter | Symbol | Test Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| RX Frequency Range | F RX | 850 | - | 1050 | MHz | |
| RX Frequency Range | F RX | 350 | - | 525 | MHz | |
| RX Frequency Range | F RX | 284 | - | 350 | MHz | |
| RX Frequency Range | F RX | 142 | - | 175 | MHz | |
| Sensitivity 169 | P RX_0.5 | (BER < 0.1%) (500 bps, GFSK, BT = 0.5, f = 250Hz) | - | -129 | - | dBm |
| P RX_40 | (BER < 0.1%) (40 kbps, GFSK, BT = 0.5, f = 20 kHz) | - | -110 | -108 | dBm | |
| P RX_100 | (BER < 0.1%) (100 kbps, GFSK, BT = 0.5, f = 50 kHz) | - | -106 | -104 | dBm | |
| P RX_500 | (BER < 0.1%) (500 kbps, GFSK, BT = 0.5, f = 250 kHz) | - | -98 | -96 | dBm | |
| P RX_9.6 | (PER 1%) (9.6 kbps, 4GFSK, BT = 0.5, f = ±2.4 kHz) | - | -110 | - | dBm | |
| P RX_1M | (PER 1%) (1 Mbps, 4GFSK, BT = 0.5, inner deviation = 83.3 kHz) | - | -89 | - | dBm | |
| P RX_OOK | (BER < 0.1%, 4.8 kbps, 350 kHz BW, OOK, PN15 data) | - | -110 | -107 | dBm | |
| P RX_OOK | (BER < 0.1%, 40 kbps, 350 kHz BW, OOK, PN15 data) | - | -103 | -100 | dBm | |
| P RX_OOK | (BER < 0.1%, 120 kbps, 350 kHz BW, OOK, PN15 data) | - | -97 | -93 | dBm |
- All minimum and maximum values are guaranteed across the recommended operating conditions of supply voltage and from -40 to +85 °C unless otherwise stated. All typical values apply at VDD = 3.3 V and 25 °C unless otherwise stated.
- For PER tests, 48 preamble symbols, 4 byte sync word, 10 byte payload and CRC-32 was used.
- Measured over 50000 bits using PN9 data sequence and data and clock on GPIOs. Sensitivity is expected to be better if reading data from packet handler FIFO especially at higher data rates.
Table 3. Receiver AC Electrical Characteristics 1,2 (Continued)
| Parameter | Symbol | Test Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| RX Sensitivity 915/868 MHz 3 | P RX_0.5 | (BER < 0.1%) (500 bps, GFSK, BT = 0.5, f = 250Hz) | - | -127 | - | dBm |
| RX Sensitivity 915/868 MHz 3 | P RX_40 | (BER < 0.1%) (40 kbps, GFSK, BT = 0.5, f = 20 kHz) | - | -109 | -107 | dBm |
| RX Sensitivity 915/868 MHz 3 | P RX_100 | (BER < 0.1%) (100 kbps, GFSK, BT = 0.5, f = 50 kHz) | - | -104 | -102 | dBm |
| RX Sensitivity 915/868 MHz 3 | P RX_500 | (BER < 0.1%) (500 kbps, GFSK, BT = 0.5, f = 250 kHz) | - | -97 | -92 | dBm |
| RX Sensitivity 915/868 MHz 3 | P RX_9.6 | (PER 1%) (9.6 kbps, 4GFSK, BT = 0.5, f = kHz) | - | -109 | - | dBm |
| RX Sensitivity 915/868 MHz 3 | P RX_1M | (PER 1%) (1 Mbps, 4GFSK, BT = 0.5, inner deviation = 83.3 kHz) | - | -88 | - | dBm |
| RX Sensitivity 915/868 MHz 3 | P RX_OOK | (BER < 0.1%, 4.8 kbps, 350 kHz BW, OOK, PN15 data) | - | -108 | -104 | dBm |
| RX Sensitivity 915/868 MHz 3 | P RX_OOK | (BER < 0.1%, 40 kbps, 350 kHz BW, OOK, PN15 data) | - | -101 | -97 | dBm |
| RX Sensitivity 915/868 MHz 3 | P RX_OOK | (BER < 0.1%, 120 kbps, 350 kHz BW, OOK, PN15 data) | - | -96 | -91 | dBm |
| RX Channel Bandwidth | BW | 1.1 | - | 850 | kHz | |
| RSSI Resolution | RES RSSI | Valid from -110 dBm to -90 dBm | - | ±0.5 | - | dB |
| 1-Ch Offset Selectivity, 169 MHz 3 | C/I 1-CH | Desired Ref Signal 3 dB above sensitiv- ity, BER < 0.1%. Interferer is CW, and desired is modulated with 2.4 kbps F = 1.2 kHz GFSK with BT = 0.5, RX channel BW = 4.8 kHz, channel spacing = 12.5 kHz | - | -69 | -59 | dB |
| 1-Ch Offset Selectivity, 450 MHz 3 | C/I 1-CH | Desired Ref Signal 3 dB above sensitiv- ity, BER < 0.1%. Interferer is CW, and desired is modulated with 2.4 kbps F = 1.2 kHz GFSK with BT = 0.5, RX channel BW = 4.8 kHz, channel spacing = 12.5 kHz | - | -60 | -50 | dB |
| 1-Ch Offset Selectivity, 868 / 915 MHz 3 | C/I 1-CH | Desired Ref Signal 3 dB above sensitiv- ity, BER < 0.1%. Interferer is CW, and desired is modulated with 2.4 kbps F = 1.2 kHz GFSK with BT = 0.5, RX channel BW = 4.8 kHz, channel spacing = 12.5 kHz | - | -55 | -45 | dB |
| Blocking 1 MHz Offset | 1M BLOCK | Desired Ref Signal 3 dB above sensitiv- ity, BER = 0.1%. Interferer is CW, and desired is modulated with 2.4 kbps, F = 1.2 kHz GFSK with BT = 0.5, RX channel BW = 4.8 kHz | - | -79 | -68 | dB |
| Blocking 8 MHz Offset | 8M BLOCK | Desired Ref Signal 3 dB above sensitiv- ity, BER = 0.1%. Interferer is CW, and desired is modulated with 2.4 kbps, F = 1.2 kHz GFSK with BT = 0.5, RX channel BW = 4.8 kHz | - | -86 | -75 | dB |
- All minimum and maximum values are guaranteed across the recommended operating conditions of supply voltage and from -40 to +85 °C unless otherwise stated. All typical values apply at VDD = 3.3 V and 25 °C unless otherwise stated.
- For PER tests, 48 preamble symbols, 4 byte sync word, 10 byte payload and CRC-32 was used.
- Measured over 50000 bits using PN9 data sequence and data and clock on GPIOs. Sensitivity is expected to be better if reading data from packet handler FIFO especially at higher data rates.
Package Information
Figure 19 illustrates the package details for the Si446x. Table 17 lists the values for the dimensions shown in the illustration.
Figure 19. 20-Pin Quad Flat No-Lead (QFN)
Table 17. Package Dimensions
| Dimension | Min | Nom | Max |
|---|---|---|---|
| A | 0.80 | 0.85 | 0.90 |
| A1 | 0.00 | 0.02 | 0.05 |
| A3 | 0.20 REF | 0.20 REF | 0.20 REF |
| b | 0.18 | 0.25 | 0.30 |
| D | 4.00 BSC | 4.00 BSC | 4.00 BSC |
| D2 | 2.45 | 2.60 | 2.75 |
| e | 0.50 BSC | 0.50 BSC | 0.50 BSC |
| E | 4.00 BSC | 4.00 BSC | 4.00 BSC |
| E2 | 2.45 | 2.60 | 2.75 |
| L | 0.30 | 0.40 | 0.50 |
| aaa | 0.15 | 0.15 | 0.15 |
| bbb | 0.15 | 0.15 | 0.15 |
| ccc | 0.10 | 0.10 | 0.10 |
| ddd | 0.10 | 0.10 | 0.10 |
| eee | 0.08 | 0.08 | 0.08 |
- All dimensions are shown in millimeters (mm) unless otherwise noted.
- Dimensioning and tolerancing per ANSI Y14.5M-1994.
- This drawing conforms to the JEDEC Solid State Outline MO-220, Variation VGGD-8.
- Recommended card reflow profile is per the JEDEC/IPC J-STD-020 specification for Small Body Components.
Related Variants
The following components are covered by the same datasheet.
| Part Number | Manufacturer | Package |
|---|---|---|
| SI4460 | Silicon Laboratories | — |
| SI4463 | Silicon Laboratories | QFN-20 |
| SI4463-C2A-GM | Silicon Laboratories | QFN- Pb-free |
| SI4463/61 | Silicon Laboratories | — |
| SI4463/61/60 | Silicon Laboratories | — |
| SI4463/61/60-C | Silicon Laboratories | — |
| SI446X | Silicon Laboratories | — |
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