Si4012
Si4012 C
RYSTAL
-
LESS
R F T
RANS MITTER
Features
Frequency range
27–960 MHz
Output Power Range
–13 to +10 dBm
Low Power Consumption
OOK
14.2 mA @ +10 dBm
FSK
19.8 mA @ +10 dBm
Data Rate = 0 to 100 kbaud FSK
FSK and OOK modulation
Power Supply = 1.8 to 3.6 V
Crystal-less operation
±150 ppm: 0 to 20° C
±250 ppm: –40 to 85° C
Optional crystal input for higher
tolerances
Low power shutdown mode
Integrated voltage regulator
256 byte FIFO
Low battery detector
SMBus Interface
–40 to +85 °C temperature range
10-Pin MSOP Package, Pb-free
RoHs compliant
Low BOM
Ordering Information:
See page 53.
Pin Assignments
Si4012
Applications
Wireless MBus T1-mode
Remote control
Home security & alarm
Personal data logging
Toy control
Wireless PC peripherals
Remote meter reading
Remote keyless entry
Home automation
Industrial control
Sensor networks
Health monitors
GPIO0/XTAL 1
GND 2
TXM 3
TXP 4
VDD 5
Si4012
10 SDA
9 SCL
8 SDN
7 nIRQ
6 LED
Description
Silicon Laboratories’ Si4012 is a fully integrated crystal-less CMOS high-data rate
RF transmitter designed for the sub-GHz ISM band. This chip is optimized for
battery powered applications requiring low standby currents and high output
transmit power.
The device offers advanced radio features including continuous frequency
coverage from 27–960 MHz, adjustable output power of up to +10 dBm, and data
rates up to 100 kbaud in FSK mode. The Si4012’s high level of integration offers
reduced BOM cost while simplifying the overall system design.
Patents pending
Functional Block Diagram
Si4012
DIGITAL LOGIC
SDA
SCL
SDN
nIRQ
ANTENNA
TUNE
OOK
FSK
MODULATOR
LCOSC
DIVIDER
PA
AUTO
TUNE
TXP
TXM
RF ANALOG CORE
SMBus
INTERFACE
TX
256 BYTE
DATA FIFO
LED
GPIO0/XTAL
DIGITAL
CONTROLLER
REGISTER
BANK
LPOSC
VA
SLP
TMR
XTAL
OSC
VD
LDO
POR
BANDGAP
BATTERY
MONITOR
VDD
GND
Rev 0.1 7/10
Copyright © 2010 by Silicon Laboratories
Si4012
This information applies to a product under development. Its characteristics and specifications are subject to change without notice.
Si4012
T
ABLE
Section
OF
C
ONTENTS
Page
1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.1. Definition of Test Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
2. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3. Pin Descriptions: Si4012 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
4. Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5. Package Outline: Si4012 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
6. PCB Land Pattern: Si4012 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Rev 0.1
3
Si4012
1. Electrical Specifications
Table 1. DC Characteristics
1
Parameter
Supply Voltage Range
Power Saving Modes
Symbol
V
DD
I
Shutdown
I
Idle
Conditions
Min
1.8
Typ
—
100
700
5
14.2
19.8
Max Units
3.6
—
—
—
—
—
V
nA
nA
mA
mA
mA
Lowest current mode
Register values retained, lowest current consumption idle
mode
Register values retained, LCOSC on fastest response to TX
mode
OOK, Manchester encoded
FSK
—
—
—
—
—
TUNE Mode Current
TX Mode Current @
10 dBm
I
Tune
I
TX_OOK
I
TX_FSK
Notes:
1.
All specification guaranteed by production test unless otherwise noted. Production test conditions and max limits are
listed in the "Production Test Conditions" section on page 9.
2.
Guaranteed by qualification. Qualification test conditions are listed in the "Production Test Conditions" section on
page 9.
Table 2. Absolute Maximum Ratings
1,2
Parameter
Supply Voltage
Input Current
3
Input Voltage
4
Junction Temperature
Storage Temperature
Symbol
V
DD
I
IN
V
IN
T
OP
T
STG
Value
–0.5 to 3.9
10
–0.3 to (V
DD
+ 0.3)
–40 to 90
–55 to 125
Unit
V
mA
V
C
C
Notes:
1.
Permanent device damage may occur if the absolute maximum ratings are exceeded. Functional operation should be
restricted to the conditions as specified in the operational sections of this data sheet. Exposure beyond recommended
operating conditions for extended periods may affect device reliability.
2.
Handling and assembly of these devices should only be done at ESD-protected workstations.
3.
All input pins besides V
DD
.
4.
For GPIO pins configured as inputs.
4
Rev 0.1
Si4012
Table 3. Si4012 RF Transmitter Characteristics
(TA = 25° C, VDD = 3.3 V, RL = 550
,
unless otherwise noted)
Parameter
Frequency Range
1
Frequency Noise (rms)
2
Phase Noise @ 915 MHz
Symbol
F
RF
Test Condition
Allen deviation, measured
across 1 ms interval
10 kHz offset
100 kHz offset
1 MHz offset
Min
27
—
—
—
—
—
—
—
—
—
—
Typ
—
0.3
–70
–100
–105
5
315
390
433.92
868
915
Max
960
—
—
—
—
—
—
—
—
—
—
+150
+250
Unit
MHz
ppm
dBc/Hz
dBc/Hz
dBc/Hz
ms
MHz
MHz
MHz
MHz
MHz
ppm
ppm
kHz
kHz
kHz
kHz
kHz
kHz
kHz
kHz
kHz
kHz
ppm
Frequency Tuning Time
Selected Frequencies in
Range of 27–960 MHz
Discrete frequencies
Carrier Frequency Accuracy
0°C
≤
T
A
≤
70° C
–40°C
≤
T
A
≤
85° C
F
RF
= 100 MHz
0°C
≤
T
A
≤
70° C
F
RF
= 100 MHz
–40°C
≤
T
A
≤
85° C
F
RF
= 315 MHz
0°C
≤
T
A
≤
70° C
F
RF
= 315 MHz
–40°C
≤
T
A
≤
85° C
F
RF
= 433.92 MHz
0°C
≤
T
A
≤
70° C
F
RF
= 433.92 MHz
–40°C
≤
T
A
≤
85° C
F
RF
= 868 MHz
0°C
≤
T
A
≤
70° C
F
RF
= 868 MHz
–40°C
≤
T
A
≤
85° C
F
RF
= 915 MHz
0°C
≤
T
A
≤
70° C
F
RF
= 915 MHz
–40°C
≤
T
A
≤
85° C
–150
–250
–15
–25
–47.3
–78.8
–65.1
–108
–130
–217
–137
–229
–10
—
—
—
—
—
—
—
—
—
—
—
15
25
47.3
78.8
65.1
108
130
217
137
229
+10
Frequency Error
Contribution with External
Crystal
Notes:
1.
The frequency range is continuous over the specified range.
2.
The frequency step size is limited by the frequency noise.
3.
Optimum differential load is equal to 4 V/(11.5mA/2 * 4/PI) = 550
Therefore
the antenna load resistance in parallel
with the Si4012 differential output resistance should equal 600
Rev 0.1
5
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