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SX1231J Schematic ( PDF Datasheet ) - Semtech Corporation

Teilenummer SX1231J
Beschreibung Low Power Integrated UHF Transceiver
Hersteller Semtech Corporation
Logo Semtech Corporation Logo 




Gesamt 30 Seiten
SX1231J Datasheet, Funktion
SX1231J
WIRELESS & SENSING
SX1231J Transceiver
Low Power Integrated UHF Transceiver
DATASHEET
RFIO
VBAT1&2
VR_ANA
VR_DIG
Power Distribution System
LNA
Σ/Δ
Single to
Mixers
Modulators
Differential
RC
Oscillator
GND
VR_PA
PA_BOOST
PA0
Ramp &
Control
PA1&2
Tank
Inductor
Loop
Filter
Division by
2, 4 or 6
Frac-N PLL
Synthesizer
XO
32 MHz
XTAL
RSSI
AFC
GND
RESET
SPI
RXTX
DIO0
DIO1
DIO2
DIO3
DIO4
DIO5
GENERAL DESCRIPTION
The SX1231J is an ARIB compliant highly integrated RF
transceiver which operates over all Japanese sub-GHz
frequency bands. Its highly integrated digital architecture
minimizes external components and provides flexibility for
optimizing the system parameters and performance. The
high sensitivity and exceptional blocking performance
combined with optimized IIP3 maximizes the range in
harshest environments. The industries lowest sleep current,
fastest wake times, and low receive current extend the
battery life for any application. The transmit output power is
programmable up to +17dBm and delivers constant
performance over the battery voltage lifetime. TrueRF™
technology enables a low-cost external component count
(eliminating SAW filter) while still satisfying ARIB, FCC, and
ETSI regulations. The device supports IEEE 15.4d/g
mandatory modes.
APPLICATIONS
Š Smart metering and IEEE15.4d/g
Š Wireless sensor networks
Š Home and building automation
Š Wireless alarm and security systems
Š Industrial monitoring and control
Š Active RFID tags
Š Remote keyless entry (RKE) and automotive
KEY PRODUCT FEATURES
Š High Sensitivity: down to -120 dBm at 1.2 kbps
Š Robust Selectivity: 42dB at 25kHz offset
Š Bullet-proof front end: IIP3 = -18 dBm, IIP2 = +35 dBm,
80 dB Blocking Immunity, no Image Frequency response
Š Low current receive mode = 16 mA
Š Low current sleep mode with register retention =100nA
Š Programmable TX Power: -18 to +17 dBm in 1dB steps
Š Constant RF performance over VDD voltage range
Š FSK bit rates up to 300 kb/s
Š Fully integrated synthesizer with a resolution of 61 Hz
Š FSK, GFSK, MSK, GMSK and OOK modulations
Š Built-in bit synchronizer for clock recovery
Š Incoming sync word recognition
Š 115 dB+ dynamic range RSSI
Š Automatic RF sense with ultra-fast AFC
Š Packet engine with CRC, AES-128, and 66-byte FIFO
Š Built-in temperature sensor and low battery indicator
ORDERING INFORMATION
Part Number Package Delivery MOQ / Multiple
MARKETS
Š Japan: ARIB STD-T67 from 426 to 470 MHz
Š Japan: ARIB STD-T108 from 915 to 930 MHz
SX1231JIMLTRT QFN24
Tape &
Reel
3000 pieces
Š Pb-free, Halogen free, RoHS/WEEE compliant product
Rev 2 - April 2012
Page 1
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SX1231J Datasheet, Funktion
WIRELESS & SENSING
1.2. Pin and Marking Diagram
The following diagram shows the pin arrangement of the SX1231J, top view.
SX1231J
DATASHEET
Figure 2. Pin Diagram (not to scale)
Notes yyww refers to the date code
xxxxxx refers to the lot number
Figure 3. Marking Diagram
Rev 2 - April 2012
Page 6
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6 Page









SX1231J pdf, datenblatt
SX1231J
WIRELESS & SENSING
DATASHEET
2.4.5. Digital Specification
Conditions: Temp = 25°C, VDD = 3.3V, FXOSC = 32 MHz, unless otherwise specified.
Table 8 Digital Specification
Symbol
VIH
VIL
VOH
VOL
FSCK
tch
tcl
trise
tfall
tsetup
thold
tnsetup
tnhold
tnhigh
T_DATA
Description
Digital input level high
Digital input level low
Digital output level high
Digital output level low
SCK frequency
SCK high time
SCK low time
SCK rise time
SCK fall time
MOSI setup time
MOSI hold time
NSS setup time
NSS hold time
NSS high time between SPI
accesses
DATA hold and setup time
Conditions
Min Typ Max Unit
0.8 -
- VDD
- - 0.2 VDD
Imax = 1 mA
0.9 -
- VDD
Imax = -1 mA
- - 0.1 VDD
- - 10 MHz
50 -
- ns
50 -
- ns
- 5 - ns
- 5 - ns
from MOSI change to SCK rising
edge
from SCK rising edge to MOSI
change
from NSS falling edge to SCK rising
edge
from SCK falling edge to NSS rising
edge, normal mode
30
60
30
30
20
-
-
-
-
-
- ns
- ns
- ns
- ns
- ns
250 -
- ns
Rev 2 - April 2012
Page 12
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12 Page





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