LTP5902-IPM_15 Datasheet, PDF (22/32 Pages) Linear Technology – SmartMesh IP Node 2.4GHz 802.15.4e Wireless Mote Module

LTP5901-IPM/LTP5902-IPM
Operation
The LTP5901-IPM/LTP5902-IPM is the world’s most energy
efficient IEEE 802.15.4 compliant platform, enabling bat-
tery and energy harvested applications. With a powerful
32-bit ARM Cortex-M3, best-in-class radio, flash, RAM
and purpose-built peripherals, Eterna provides a flexible,
scalable and robust networking solution for applications
demanding minimal energy consumption and data reliability
in even the most challenging RF environments.
Shown in Figure 9, Eterna integrates purpose-built periph-
erals that excel in both low operating-energy consump-
tion and the ability to rapidly and precisely cycle between
operating and low-power states. Items in the gray shaded
region labeled Analog Core correspond to the analog/RF
components.
Power Supply
Eterna is powered from a single pin, VSUPPLY, which
powers the I/O cells and is also used to generate internal
supplies. Eterna’s two on-chip DC/DC converters minimize
Eterna’s energy consumption while the device is awake. To
conserve power the DC/DC converters are disabled when
the device is in low power state. Eterna’s power supply
conditioning architecture, including the two integrated DC/
DC converters and three integrated low dropout regula-
tors, provides excellent rejection of supply noise. Eterna’s
operating supply voltage range is high enough to support
direct connection to lithium-thionyl chloride (Li-SOCl₂)
sources and wide enough to support battery operation
over a broad temperature range.
32kHz
DIGITAL CORE
SRAM
72kB
FLASH
512kB
FLASH
CONTROLLER
CODE
SYSTEM
TIMERS
SCHED
PMU/
CLOCK
CONTROL
AES
AUTO
MAC
32kHz, 20MHz
PRIMARY
DC/DC
CONVERTER
RELAXATION
OSCILLATOR
802.15.4
MOD
802.15.4
FRAMING
DMA
802.15.4
DEMOD
PoR
DAC
LPF
ADC
LIMITER BPF
ANALOG CORE
VOLTAGE REFERENCE
CORE REGULATOR
CLOCK REGULATOR
ANALOG REGULATOR
PA
DC/DC
CONVERTER
20MHz
PA
PLL
PPF
LNA
IPCS
SPI
SLAVE
CLI
UART
(2-PIN)
API
UART
(6-PIN)
ADC
CTRL
AGC
RSSI
10-BIT
ADC
VGA
PTAT
4-BIT
DAC
22
Figure 9. Eterna Block Diagram
For more information www.linear.com/LTP5901-IPM or www.linear.com/LTP5902-IPM
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