SI4330-B1-FMR Silicon Laboratories Inc, SI4330-B1-FMR Datasheet - Page 14

• Manufacturer Part Number: SI4330-B1-FMR
• Description: IC RX ISM 240-960MHZ 20VQFN
• Manufacturer: Silicon Laboratories Inc

Specifications of SI4330-B1-FMR

• Frequency: 240MHz ~ 960MHz
• Sensitivity: -121dBm
• Data Rate - Maximum: 256 kbps
• Modulation Or Protocol: FSK, GFSK, OOK
• Applications: Remote Control, RKE, Security Systems
• Current - Receiving: 18.5mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Features: RSSI Equipped
• Voltage - Supply: 1.8 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-VQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -

Si4330-B1
2. Functional Description
The Si4330 is an ISM wireless receiver with continuous frequency tuning over the specified bands which
encompasses from 240–960 MHz. The wide operating voltage range of 1.8–3.6 V and low current consumption
makes the Si4330 an ideal solution for battery powered applications.
The Si4330 receiver uses a single-conversion mixer to downconvert the 2-level FSK/GFSK/OOK modulated
receive signal to a low IF frequency. Following a programmable gain amplifier (PGA) the signal is converted to the
digital domain by a high performance  ADC allowing filtering, demodulation, slicing, and packet handling to be
performed in the built-in DSP increasing the receiver’s performance and flexibility versus analog based
architectures. The demodulated signal is then output to the system MCU through a programmable GPIO or via the
standard SPI bus by reading the 64-byte RX FIFO.
A high precision local oscillator (LO) is generated by an integrated VCO and  Fractional-N PLL synthesizer. The
synthesizer is designed to support configurable data rates, output frequency and frequency deviation at any
frequency between 240–960 MHz.
The Si4330 supports frequency hopping and antenna diversity switch control to extend the link range and improve
performance. Antenna diversity is completely integrated into the Si4330 and can improve the system link budget by
8–10 dB, resulting in substantial range increases depending on the environmental conditions.
The Si4330 is designed to work with a microcontroller, crystal, and a few external components to create a very low
cost system. Voltage regulators are integrated on-chip which allows for a wide operating supply voltage range from
+1.8 to +3.6 V. A standard 4-pin SPI bus is used to communicate with an external microcontroller. Three
configurable general purpose I/Os are available. A complete list of the available GPIO functions is shown in "8.
Auxiliary Functions" on page 40 and includes microcontroller clock output, Antenna Diversity, Antenna Switch,
POR, and various interrupts. A complete list of the available GPIO functions is shown in AN467: Si4330 Register
Descriptions.”
14
Supply Voltage
100 p
C3
C1
C2
L1
100 n
C4
Figure 1. RX Application Example
1 u
C5
Programmable load capacitors for X1 are integrated.
L1, C1, and C2 values depend on frequency band, and antenna
impedance.
VDD_RF
RXn
NC
RFp
NC
Rev 1.0
1
3
2
4
5
30 MHz
Si4330
X1
15
14
13
12
11
1 u
C6
SCLK
SDI
SDO
VDD_D
NC
GP1
GP2
GP3
GP4
GP5
Microcontroller
VDD
VSS