SI4031-B1-FM Silicon Laboratories Inc, SI4031-B1-FM Datasheet - Page 51

• Manufacturer Part Number: SI4031-B1-FM
• Description: IC TX 240-930MHZ -8-13DB 20VQFN
• Manufacturer: Silicon Laboratories Inc
• Type: ISM Transmitterr

Specifications of SI4031-B1-FM

• Package / Case: 20-VQFN
• Frequency: 240MHz ~ 930MHz
• Applications: General Purpose
• Modulation Or Protocol: FSK, GFSK, OOK
• Data Rate - Maximum: 256 kbps
• Power - Output: 13dBm
• Current - Transmitting: 30mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 1.8 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Operating Frequency: 240 MHz to 930 MHz
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 1.8 V to 3.6 V
• Supply Current: 30 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

12. Pin Descriptions: Si4030/31/32
PKG
Pin
3–6
10
12
13
14
15
16
17
18
19
20
11
1
2
7
8
9
PADDLE_GND
Pin Name
VDD_DIG
VDD_RF
VR_DIG
GPIO_0
GPIO_1
GPIO_2
XOUT
SCLK
nSEL
nIRQ
SDO
SDN
SDI
XIN
NC
NC
TX
GND
VDD
VDD
I/O
I/O
I/O
I/O
—
—
O
O
O
O
O
I
I
I
I
I
+1.8 to +3.6 V supply voltage input to all analog +1.7 V regulators. The recommended V
is +3.3 V.
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.
No Connect.
General Purpose Digital I/O that 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. See the SPI GPIO Configuration Registers, Address 0Bh, 0Ch, and 0Dh for
more information.
Regulated Output Voltage of the Digital 1.7 V Regulator. A 1 µF decoupling capacitor is required.
Internally this pin is tied to the paddle of the package. This pin should be left unconnected or connected to
GND only.
+1.8 to +3.6 V supply voltage input to the Digital +1.7 V Regulator. The recommended V
is +3.3 V.
0–V
Serial Data input. 0–V
bus.
Serial Clock input. 0–V
serial data bus. Data is clocked into the Si4030/31/32 on positive edge transitions.
Serial Interface Select input. 0– V
line serial data bus. The signal is also used to signify burst read/write mode.
General Microcontroller Interrupt Status output. When the Si4030/31/32 exhibits anyone of the Interrupt
Events the nIRQ pin will be set low=0. Please see the Control Logic registers section for more information
on the Interrupt Events. The Microcontroller can then determine the state of the interrupt by reading a cor-
responding SPI Interrupt Status Registers, Address 03h and 04h. No external resistor pull-up is required,
but it may be desirable if multiple interrupt lines are connected.
Crystal Oscillator Output. Connect to an external 30 MHz crystal or to an external source. If using an
external source with no crystal then dc coupling with a nominal 0.8 VDC level is recommended with a min-
imum amplitude of 700 mVpp.
Crystal Oscillator Input. Connect to an external 30 MHz crystal or leave floating when driving with an
external source on XOUT.
Shutdown input pin. 0–V
SDN =1 the chip will be completely shutdown and the contents of the registers will be lost.
The exposed metal paddle on the bottom of the Si4030/31/32 supplies the RF and circuit ground(s) for the
entire chip. It is very important that a good solder connection is made between this exposed metal paddle
and the ground plane of the PCB underlying the Si4030/31/32.
DD
V digital output that provides a serial readback function of the internal control registers.
VDD_RF
NC
NC
NC
TX
DD
2
3
4
5
1
6
DD
DD
V digital input. This pin provides the serial data stream for the 4-line serial data
V digital input. This pin provides the serial data clock function for the 4-line
20
7
V digital input. SDN should be = 0 in all modes except Shutdown mode. When
Rev 1.1
19
8
GND
PAD
DD
18
9
V digital input. This pin provides the Select/Enable function for the 4-
17
10
16
11
15 SCLK
14
13
12
Description
SDI
SDO
VDD_DIG
NC
Si4030/31/32-B1
DD
DD
supply voltage
supply voltage
51