SI1012-A-GM Silicon Laboratories Inc, SI1012-A-GM Datasheet - Page 267
![IC TXRX MCU + EZRADIOPRO](/photos/14/21/142131/42-qfn-series_sml.jpg)
SI1012-A-GM
Manufacturer Part Number
SI1012-A-GM
Description
IC TXRX MCU + EZRADIOPRO
Manufacturer
Silicon Laboratories Inc
Specifications of SI1012-A-GM
Package / Case
42-QFN
Frequency
240MHz ~ 960MHz
Data Rate - Maximum
256kbps
Modulation Or Protocol
FSK, GFSK, OOK
Applications
General Purpose
Power - Output
13dBm
Sensitivity
-121dBm
Voltage - Supply
1.8 V ~ 3.6 V
Current - Receiving
18.5mA
Current - Transmitting
30mA
Data Interface
PCB, Surface Mount
Memory Size
16kB Flash, 768B RAM
Antenna Connector
PCB, Surface Mount
Number Of Receivers
1
Number Of Transmitters
1
Wireless Frequency
240 MHz to 960 MHz
Interface Type
UART, SMBus, SPI, PCA
Output Power
13 dBm
Operating Supply Voltage
0.9 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Maximum Supply Current
4 mA
Minimum Operating Temperature
- 40 C
Modulation
FSK, GFSK, OOK
Protocol Supported
C2, SMBus
Core
8051
Program Memory Type
Flash
Program Memory Size
16 KB
Data Ram Size
768 B
Supply Current (max)
4 mA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Operating Temperature
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1871-5
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
SI1012-A-GMR
Manufacturer:
ROHM
Quantity:
12 000
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23.5.4. ADC
The amplified IQ IF signals are digitized using an Analog-to-Digital Converter (ADC), which allows for low
current consumption and high dynamic range. The bandpass response of the ADC provides exceptional
rejection of out of band blockers.
23.5.5. Digital Modem
Using high-performance ADCs allows channel filtering, image rejection, and demodulation to be performed
in the digital domain, resulting in reduced area while increasing flexibility. The digital modem performs the
following functions:
The digital channel filter and demodulator are optimized for ultra low power consumption and are highly
configurable. Supported modulation types are GFSK, FSK, and OOK. The channel filter can be configured
to support bandwidths ranging from 620 kHz down to 2.6 kHz. A large variety of data rates are supported
ranging from 0.123 up to 256 kbps. The AGC algorithm is implemented digitally using an advanced control
loop optimized for fast response time.
The configurable preamble detector is used to improve the reliability of the sync-word detection. The sync-
word detector is only enabled when a valid preamble is detected, significantly reducing the probability of
false detection.
The received signal strength indicator (RSSI) provides a measure of the signal strength received on the
tuned channel. The resolution of the RSSI is 0.5 dB. This high resolution RSSI enables accurate channel
power measurements for clear channel assessment (CCA), carrier sense (CS), and listen before talk (LBT)
functionality.
Frequency mistuning caused by crystal inaccuracies can be compensated by enabling the digital auto-
matic frequency control (AFC) in receive mode.
A comprehensive programmable packet handler including key features of Silicon Labs’ EZMAC is inte-
grated to create a variety of communication topologies ranging from peer-to-peer networks to mesh net-
works. The extensive programmability of the packet header allows for advanced packet filtering which in
turn enables a mix of broadcast, group, and point-to-point communication.
A wireless communication channel can be corrupted by noise and interference, and it is therefore impor-
tant to know if the received data is free of errors. 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 transmit-
ted packet and verified by the receiver to confirm that no errors have occurred. The packet handler and
CRC can significantly reduce the load on the microcontroller reducing the overall current consumption.
The digital modem includes the TX modulator which converts the TX data bits into the corresponding
stream of digital modulation values to be summed with the fractional input to the sigma-delta modulator.
This modulation approach results in highly accurate resolution of the frequency deviation. A Gaussian filter
is implemented to support GFSK, considerably reducing the energy in the adjacent channels. The default
bandwidth-time product (BT) is 0.5 for all programmed data rates, but it may be adjusted to other values.
Channel selection filter
TX modulation
RX demodulation
AGC
Preamble detector
Invalid preamble detector
Radio signal strength indicator (RSSI)
Automatic frequency compensation (AFC)
Packet handling including EZMAC
Cyclic redundancy check (CRC)
®
features
Rev. 1.0
Si1010/1/2/3/4/5
267
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