OL2385LWPWRLF, Sub-GHz Low-Power Multi-Standard Wireless Platform - Leafleft

Robust, reliable
analog solutions
Sub-GHz Low-Power Multi-Standard
Wireless Platform
OL2385 Low-Power Multi-Channel UHF Transceiver
TARGET APPLICATIONS

Smart grid NAN

Smart metering

Building and home automation

Wireless sensor network

Machine-to-machine communication

Low-power wide area networking
OVERVIEW
The NXP® OL2385 radio frequency transceiver with
embedded microcontroller is designed for a wide range of
industrial and home applications requiring very high link
budget for bi-directional RF communication.
The embedded microcontroller in the OL2385 multi-standard
sub-GHz transceiver enables the implementation of complete
subsystem and lower layer driver functions. As a result,
package pre-processing and time-critical ACK responses are
simpler than the responses from standard transceiver devices
fully controlled by a host MCU.
The device is supplied with standard software stacks such as
IEEE802.15.4, W-MBus Data Link Layer and SIGFOX. These
software stacks are preprogrammed in the factory and are
controlled by a system host microcontroller via APIs available
through either UART or SPI. NXP’s Kinetis® microcontroller
is supplied with a driver library and the Kinetis software
development kit (SDK).
The transmitter has a high dynamic range of -25 dBm to +14
dBm and efficient power ramping PA. The excellent phase
noise of the transmitter conforms to ETSI, FCC and ARIB
standards.
Configured to operate with low active and standby power,
the transceiver is ideal for battery-powered applications.
FEATURES AND BENEFITS
Blocking performance at 1 MHz: 58 dBm
Key features
Phase noise at 1
MHz 868 MHz: -127 dBc
Single IC for bands (160–960 MHz)
at 100 kHz 868 MHz: -110 dBc
Ultra-low RX power below 11 mA
Image Rejection: 60 dB
Up to +14 dBm output power at 29 mA
Antenna Diversity
Sensitivity -128 dBm at 4 kHz
Two RF inputs are available for the receiver and allow
sequential antenna diversity to be performed, should one
antenna show a better performance in a given environment or
for a specific radio channel.
TRXSWITCH_RX
LNA
Q1
The attenuation factor of these attenuators can be
compensated in the digital domain, meaning that gain control
can be implemented throughout data reception without the
loss of any data bits. This strategy ensures system robustness
in the case of multi-path fading or narrowband jammers. Link
budget and system robustness are essential parameters for
modern automotive RF systems, and the OL2385 transceiver is
an industry benchmark in all respects:
P21
P22
37
38
39
P23
TEST
VDD_DIGL
40
Dem. Data Clock
Bit
Mixer
Filter
35
DMA
P17
Filter Recov. Proces.
34
Tx
Encoder
MSCL
Power
regulator
α
DMA
33
Internal
Temperature
Sensor
32
Interrupt
controller
DMA
controller
7
MDI
Timer0
MRK IIIe
CPU
Timer1
USART0
31
Main RC
oscillator
10
Port wake-up
logic
General
purpose ADC
Timer3,
RX timer
EROM
Crystal
oscillator
Watchdog
PLL subsystem
LO chain
VCO
Loop
filter
Lock Charge
DIV 2
Fractional-N
divider
÷
N÷M
11
27
P12
P13
VCO calibration
26
21
20
GND_DIG
VDD_3VOUT
19
18
VDD_LO
17
16
XTAL_P
28
P14
5V Voltage regulator
GND_LO
14
13
15
GND_XO
XTAL_N
VDD_XO
12
P11
Polling timer
detect pump
VDD_PA
29
System
Timer0
PFD
P10
RAM
Power &
system control
9
Bitmanipulation
registers
22
GND_PA
Port control
VDD_5VIN
8
VDD_IO
Timer2
Memory management unit
ROM
TXOUT
30
SPI UART LIN
Clock
generation
GND_PA_RF
RST_N
CRC coprocessor
USART1
24
6
SPI UART LIN
TRXSWITCH_TX
23
5
MSDA
25
P15
P16
GND_RF
4
Tx
Modulator
VDD_DIG
TRXSWITCH_ANT
Power Amplifier
A LEADER IN ANALOG SOLUTIONS:
Expanding on more than 30 years of innovation, our company
is a leading provider of high-performance products that use
SMARTMOS® technology, combining digital, power and
standard analog functions. NXP supplies analog and power
management ICs that are advancing the automotive, consumer,
industrial and networking markets. Analog solutions interface
with real-world signals to control and drive for complete
embedded systems.
RF front end noise figure: 5 dB
FSK sensitivity: -12 -128 dBm
www.nxp.com and imxcommunity.org
NXP, the NXP logo, Kinetis and SMARTMOS are trademarks of NXP B.V. All other product or service names are the property of their respective owners.
© 2016 NXP B.V.
Document Number: OL2385LWPWRLF REV 0
Filter
α
ADC
IQADC
VCO
P20
Digital receiver chain
RadioTx
GND_RF
VREGPA
The use of attenuators make advanced gain control possible.
The gain of the ‘active’ elements within the receive path, e.g.,
LNA, Mixer, etc., remains fixed. Control of the gain is achieved
by switching attenuators before and after the LNA. The gain
switch is then immediate and predictable, requiring no
settling time.
41
ADC
Low power RC
oscillator
RF Front End
GND_DIG
GND_ADC
43
IFP_DCBUS
44
Sigma-delta
GND_LO
Minimum image rejection of 50 dB is guaranteed over
temperature and supply. Using an NXP-patented onboard
generated pilot tone calibration technique in combination with
an onboard temperature sensor, calibration values are stored in
a look-up table, ensuring optimum settling time.
TIA
3
Switch
Image Rejection
Zero IF
36
Mixer
I1
2
TRX
FEATURE HIGHLIGHTS
Decim. IQcal
1
RF frontend
GND_RF
42
RF_IN_B
45
48
Operating temperature range: -40 °C to +85 °C
RF_IN_A
HVQFN48 package (7 x 7 mm²)
IFN_SENSE_IN
OL2385SIMPLIFIED
SIMPLIFIEDBLOCK
BLOCKDIAGRAM
DIAGRAM
OL2385
VDD_ADC
400 kbit/s 4(G)FSK, 200 kbit/s 2(G)FSK, ASK, OOK
46
WMBus2013, KNX, 802.15.4, T108, sub-GHz ZigBee®, SigFox
VDD_RF
Supported software standards:
47
Excellent phase noise