LTC5800-IPR View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LTC5800-IPR Datasheet PDF : 28 Pages
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Advanced Information
2.0 Introduction
Eterna is the world’s most energy-efficient IEEE 802.15.4 compliant platform enabling battery and energy harvested
endpoint, routing and network management solutions. 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 both minimal energy consumption and data reliability in even the most challenging RF environments.
Shown in Figure 1, Eterna integrates purpose-built peripherals that excel in both low operating-energy consumption and the
ability to rapidly and precisely cycle between operating and low-power states. Items in the shaded region correspond to the
analog/RF components.
32 kHz
SRAM
72 KB
Flash
512 KB
Flash
Controller
Code
Cortex-M3
System
Timers
Sched.
PMU /
Clock
Control
AES
Auto
MAC
802.15.4
Mod
802.15.4
Framing
DMA
32 kHz, 20 MHz
Primary
DC/DC
Converter
Relaxation
Oscillator
PoR
PA
DC/DC
Converter
Voltage Reference
Core Regulator
Clock Regulator
Analog Regulator
DAC LPF
PA
PLL
802.15.4
Demod
ADC
Limiter BPF
PPF LNA
IPCS
SPI
Slave
CLI
UART
(2 pin)
API
UART
(6-pin)
ADC
Ctrl.
10-bit
ADC
AGC
RSSI
VGA S
PTAT
4-bit
DAC
Bat.
Load
Figure 1 Eterna Block Diagram
2.1
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 prevent power
from being wasted the DC/DC converter is disabled when the device is in low-power state. Eterna’s rejection of supply noise
is substantial owing to the two integrated DC/DC converters and three integrated low-dropout regulators. Eterna’s operating
supply range is high enough to support direct connection to Li-SClO2 sources and wide enough to support battery operation
over a broad temperature range.
Eterna Datasheet
Linear Technology / Dust Networks
5
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